nx_wasm_craft.nx source
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1// nx_wasm_craft.nx -- NISHI CRAFT: a GENERATED 3D VOXEL WORLD, playable first-person. The operator's
2// 2026-05-19 vision ("build minecraft equivalent on the lowest possible hardware") finally EMITTING:
3// procedural terrain (integer value-noise heightmap, biome banding, water, trees) in a 64x32x64 block
4// grid, rendered by a per-pixel integer DDA raycast (true 3D: block faces, face shading, distance fog,
5// sky), walked in first person (collision, auto-step-up, water float), and EDITED live (break/place at
6// the crosshair). Every pixel and every world byte is NishiLang; base-relative so the identical code
7// runs natively (gate, PNG proof) and as wasm (browser page); input arrives through nx_input_abstract
8// (keyboard/gamepad/touch all work on day one).
9//
10// Controls (via the input layer's semantic actions): W/S or Up/Down = walk, A/D or Left/Right = turn,
11// R/F = look up/down (bound to the MENU/PAUSE bits -- the 8-action mask is fully spent; widening it
12// to 16 actions is the filed follow-up), E = break block, B = place stone. Touch d-pad works: center
13// tap = break.
14//
15// license_tier: ORIGINAL
16import "nx_syscalls.nx"
17import "nx_itrig.nx"
18import "nx_input_abstract.nx"
19import "nx_atmosphere.nx"
20import "nx_weather_lib.nx"
21import "nx_softbind.nx"
22import "nx_skeleton.nx"
23import "nx_skin_ita.nx"
24import "nx_nxa_anim_lib.nx" // GE31/GE23: the ONE NXA clip evaluator -- the cast's joint rows are computed HERE, not in page JS
25import "nx_morf_draw_core.nx"
26import "nx_nxa_morf_draw_admit.nx"
27import "_hdl_build/nx_entity_store.nx"
28import "_hdl_build/nx_gamesave_core.nx"
29import "nx_indoorgen_data.nx"
30// GE14a: the PURE staged-terrain core (six parameter fields -> spline -> relief/erosion).
31// Allocator-free and syscall-free, which is the only reason it can live in this wasm target --
32// nx_worldpipe's hydrology and erosion BAKES allocate and stay NAS-side (rung GE14b).
33import "nx_worldpipe_core.nx"
34// THE ONE GEN-TIME RECIPE ALLOWLIST (2026-09-04): init_impl_v's gok9 chain, nx_world_snap and nx_game_page_emit's
35// NXGP passes all read genp_gen_ok from this lib, so an index admitted to the engine reaches the instrument and
36// the page in the same edit. Pure arithmetic, wasm-safe. nx_wasm_craft_gate T90 pins every P_* slot to it.
37import "nx_genp_allow_lib.nx"
38// GE32: frame-budget telemetry -- the window, percentiles and spike count are computed HERE from the raw
39// rAF interval the page feeds through perf_frame, so the served HUD and the pacing referee gate read ONE
40// ruler. Allocation-free and syscall-free like everything else in this target.
41import "nx_perf_lib.nx"
42import "nx_beach_release_recipe.nx"
43import "nx_beach_contact_sweep.nx"
44const WATER_MAGIC_16777216: i64 = 16777216
45const EJRN_HASH_MUL: i64 = 40503
46const WATER_MAGIC_33554431: i64 = 33554431
47const TERRAIN_HASH_X: i64 = 374761393
48const TERRAIN_HASH_Z: i64 = 668265263
49const TERRAIN_HASH_SEED: i64 = 1442695041
50const SAVE_CK_MASK: i64 = 4611686018427387903
51const TERRAIN_HASH_MIX: i64 = 1274126177
52const RAY_HUGE: i64 = 1099511627776
53const WATER_MAGIC_65536: i64 = 65536
54const WATER_MAGIC_4096: i64 = 4096
55const WATER_MAGIC_1048576: i64 = 1048576
56const WATER_MAGIC_1536: i64 = 1536
57const WATER_MAGIC_6144: i64 = 6144
58const GENE_MASK_TEMPERAMENT: i64 = 57344
59const SAVE_CK_SEED: i64 = 1469598103
60const SAVE_CK_PRIME: i64 = 1099511
61const WATER_MAGIC_2400: i64 = 2400
62const WATER_MAGIC_2500: i64 = 2500
63const WATER_MAGIC_1400: i64 = 1400
64const CRAFT_DEFAULT_SEED: i64 = 20260728
65
66// ★4K-CLASS NATIVE, SCALED TO THE HARDWARE (operator 2026-08-14: "significantly worse ... up and
67// beyond 4k resolution ... scaling to the available hardware"). The WebGL path used to render at true
68// device resolution while this rasteriser was pinned at 480x300 and CSS-stretched to 1920 -- a 4x linear
69// upscale, which is exactly what "significantly worse" was.
70// W/H are the FRAMEBUFFER, and the renderer derives rw=W/q, rh=H/q, foc=W/(2q) -- so FOV is invariant
71// under q BY CONSTRUCTION and the adaptive controller is the thing that scales to the hardware.
72// 1920x1200 keeps the old 16:10 aspect EXACTLY, so framing is unchanged -- it is 4x the linear detail
73// and 16x the AREA of the 480x300 this replaces.
74// ★THE SAFETY PROPERTY THAT MAKES THIS NON-REGRESSIVE: at q=8 this is rw=240, rh=150, foc=120 --
75// byte-for-byte the old default. The initial q is 8, so the first frame costs what it always did; the
76// controller only refines toward q=1 (one ray per pixel) when frames measure under 11ms.
77// ★CEILING CHOSEN FROM THE MEMORY ENVELOPE, NOT TASTE: pixels are i64 because this language has no
78// 32-bit pointer type (MEASURED: 0 hits for `as *u32` across 23,072 sources, coverage complete), so
79// the framebuffer costs W*H*8 = 18.4 MB. A 3840x2400 ceiling would cost 73.7 MB to expose a q=1 that
80// is unreachable anyway -- 9.2M DDA rays per frame is seconds, not milliseconds. Real 4K needs 4-byte
81// pixels plus SIMD, not a bigger constant here; raising W alone buys memory, not detail.
82// ★THE CEILING IS BOUNDED BY THE WASM LINEAR MEMORY, AND THAT BOUND IS NOT NEGOTIABLE BY TASTE.
83// The WAT backends size linear memory FROM THIS MODULE (2026-08-18): they read the
84// `static nx_wasm_pages_req` contract row below at emit time, so the page count has ONE
85// owner (this file) instead of the three drifting copies that shipped 192-vs-364 and
86// fail-closed the lane. (The AHEAD reconciliation that gated this: the 21 "lost" strings
87// were superseded rewords of nx_parse diagnostics, proven live by fixture.) A 1920x1200 framebuffer at O_FB needs
88// 3,590,528 + 18,432,000 = 22,022,528 bytes, i.e. 9.4 MB PAST THE END, so every render trapped with
89// "index out of bounds" and /craft went black. Shipped and caught in production 2026-08-14.
90// 1200x750 keeps the 16:10 aspect and needs 3,590,528 + 7,200,000 = 10,790,528, leaving 1,792,384
91// bytes of headroom inside the same 192 pages. It is still 2.5x the linear detail and 6.25x the AREA
92// of the 480x300 this replaced.
93// ★AND IT KEEPS EXACT PARITY WITH THE OLD DEFAULT: at Q_START=5, rw = 1200/5 = 240, rh = 750/5 = 150,
94// foc = 1200/(2*5) = 120 -- byte-for-byte the pre-change frame, so no machine is worse off.
95// WASM_MEM_BYTES below mirrors the backend's page count so nx_wasm_craft_gate can REFUSE a ceiling
96// that does not fit; the real remedy is for the backend to size pages from the module's own arena
97// rather than a constant, and that is owed.
98// ★THE RENDER CEILING IS THE PAGE'S OWN DISPLAY CAP, NOT A TASTE (operator 2026-08-17: "why these
99// arbitrary resolution rates"): the emitted page has always capped the canvas at min(98vw,1920px) --
100// the ceiling below and that cap were TWO constants describing ONE thing, and at 1200 the render
101// ceiling silently bound first on every desktop display. Now the ceiling IS the cap (1920 wide at
102// the shipped 16:10 aspect); which fraction of it a device actually renders is decided PER DEVICE by
103// the adaptive controller against that device's own measured budget -- no resolution number below
104// this line is chosen by hand.
105const W: i64 = 1920
106const H: i64 = 1200
107const WASM_PAGE_BYTES: i64 = 65536
108// pages = ceil(CRAFT_TOTAL / page) + the previously PROVEN slack. ceil alone is 339 (339*65536 =
109// 22,216,704 >= CRAFT_TOTAL 22,216,352); the +25 pages carry forward the old configuration's
110// measured-working headroom class (~1.6MB) as the runtime/shim allowance -- honestly UNMEASURED
111// whether anything needs it, so it is kept, named, and gate T60 pins the fit while the wasm-vm
112// gate's PAINTS tooth proves the module actually runs inside what it declares.
113const WASM_PAGES: i64 = 364
114const WASM_MEM_BYTES: i64 = WASM_PAGES * WASM_PAGE_BYTES
115// MODULE-OWNED PAGE SIZING, BLOCKED AT THE ENCODER (2026-08-18): the WAT backends
116// (wat_mem_pages in nx_wasm/nx_wasm_scalararm) READ a module-declared
117// `static nx_wasm_pages_req: i64 = WASM_PAGES` and size linear memory from it --
118// mechanism shipped and bite-proven. But nxasm_x86 refuses ANY nonzero-init
119// writable static (G3_NONZERO_INIT_STATIC_UNSUPPORTED_BOTH_LANES: GNU .rodata
120// would fault the first write, nxasm ignores .data wholesale), so declaring it
121// here breaks every NATIVE importer of this engine (the gate). Until nxasm
122// grows .data placement (debt filed with this exact spec), the page count rides
123// the backends' WAT_MEM_PAGES_DEFAULT and the vm-gate's FITS tooth is the
124// drift catcher -- it refused the 192-era wasm and will refuse the next drift.
125// DO NOT re-add the static until `nx_sov_build_run nx_wasm_craft_gate` compiles.
126const RES: i64 = 2 // ray per RESxRES pixel block (240x150 rays)
127const RW: i64 = 240
128const RH: i64 = 150
129const FOC: i64 = 120 // ~90 degree fov at RW=240
130// ★THE ADAPTIVE RANGE, WIDENED AT BOTH ENDS so "scale to the hardware" is real in both directions.
131// q divides the framebuffer: q=1 is 1920x1200 (one ray per pixel) and q=24 is 80x50.
132// Q_START=8 reproduces the OLD default exactly (1920/8=240 x 1200/8=150 rays, foc 1920/16=120), so
133// weak hardware is never worse off than it was and strong hardware can now actually be used.
134const Q_MAX: i64 = 24
135const Q_START: i64 = 5
136
137// ★A DEPTH BUFFER THAT COSTS ZERO BYTES. The compare board's skinned-characters-in-world row names its
138// blocker as "seed a depth buffer from the voxel pass so terrain occludes limbs correctly".
139// ⚠THE CONTRACT SYMBOL IS DELIBERATELY NOT SPELLED HERE. The compare generator measures whether the
140// symbol EXISTS in source, and it does not strip comments -- so naming it in prose flipped the published
141// row to LANDED with no capability behind it (measured: coverage jumped 500 to 525 permil on a comment).
142// A completion signal that keys on a name rewards writing the name; a scanner that does not skip comments
143// measures the documentation, not the code. Ship the function, then the row flips honestly.
144// A separate buffer cannot exist here: the WAT backend emits 192 wasm pages = 12,582,912
145// bytes and the arena already uses 10,790,528, leaving 1,792,384 -- while a full-resolution depth plane
146// would need another W*H*8 = 7,200,000. Shipping one would black out /craft exactly as the 1920x1200
147// framebuffer did on 2026-08-14.
148// The room was already there: a pixel is an i64 carrying a 24-bit packed colour, so 40 bits sit unused
149// every frame. The voxel pass ALREADY computes the crossing-t it needs for shading and then throws it
150// away. Depth now rides bits 32..55 of the same word and is stripped in one pass before the frame is
151// published, so no consumer -- page blit, gate frame scans, PNG proof -- ever sees a changed format.
152const FB_COLOR_MASK: i64 = 16777215
153const FB_DEPTH_SHIFT: i64 = 32
154const FB_DEPTH_MAX: i64 = 16777215
155
156// ★THE WIDTH THE HUD PIXEL SIZES WERE AUTHORED AT. Every HUD length below is scaled by rw/HUD_DESIGN_W
157// rather than held as a raw pixel count, for the same reason mob_draw's billboard cap is a fraction: a
158// constant pixel size means a different FRACTION OF THE SCREEN at every resolution, and the canvas is
159// sized to rw x rh and upscaled by the browser, so the fraction is what the player actually sees.
160const HUD_DESIGN_W: i64 = 480
161const HUD_PIP_MAX: i64 = 24
162const HUD_HOTBAR_N: i64 = 7
163
164const WX: i64 = 128 // world blocks (v2: 4x the area, taller)
165const WY: i64 = 48
166const WZ: i64 = 128
167const WATER_H: i64 = 9
168
169// FARMING-LIFE blocks (roadmap B1/B2): wetness lives IN the id and crops are separate stage ids,
170// so the v6 save format is UNTOUCHED -- voxels + the edit journal already persist every farm cell.
171const B_FARM: i64 = 12 // tilled farmland, dry
172const B_CROP0: i64 = 13 // crop sprout (placed by SEEDS onto farmland)
173const B_CROP1: i64 = 14 // crop growing
174const B_CROP2: i64 = 15 // crop MATURE -- breaking it is the HARVEST
175const B_FARMW: i64 = 16 // farmland, wet (rain or water within the 5x5 ring)
176
177// ★THE FRAMEBUFFER MOVED TO THE END OF THE ARENA so it can GROW without shifting a single other
178// offset. Every block below (O_ST .. O_GENP) keeps its absolute address, which is what makes a 16x
179// resolution change a 4-constant edit instead of a 12-offset relayout nobody could verify.
180// The 1,152,000 bytes at offset 0 are now unused and reclaimable -- stated, not hidden.
181const O_FB: i64 = 3592832 // W*H i64 packed R|G<<8|B<<16 (at the arena tail; see CRAFT_TOTAL)
182const O_ST: i64 = 1152000 // 64 state slots
183const O_INPUT: i64 = 1152512 // nx_input_abstract arena (64 words)
184const O_VOX: i64 = 1153024 // WX*WY*WZ u8 blocks
185const O_MOBS: i64 = 1939456 // nx_entity_store arena (certified part): en_bytes(16,7)=1632
186const MOB_CAP: i64 = 16
187const MOB_NCOMP: i64 = 7
188const MOB_BYTES: i64 = 1632
189const O_SPEC: i64 = 1941120 // GAME SPEC block (64 words) -- AFTER the arena's 1632B end
190const O_EJRN: i64 = 1941760 // EDIT JOURNAL: 8192 packed i64 hash slots at ABSOLUTE world
191 // coords (v6 streaming). Reuses the pre-v6 save staging spot.
192const EJRN_SLOTS: i64 = 8192
193const EJRN_BYTES: i64 = 65536
194const O_SAVE: i64 = 2730336 // v6 save image (relocated past MOBAUX): 128B header + voxels
195 // + mob arena + edit journal. The page reads save_off() so the
196 // relocation is invisible to every surface.
197const SAVE_HDR: i64 = 128
198const SAVE_BODY: i64 = 853600 // WX*WY*WZ + MOB_BYTES + EJRN_BYTES
199const SAVE_BODY_V5: i64 = 788064 // pre-streaming body (load-compat: v5 saves still open)
200const SAVE_LEN: i64 = 853728 // SAVE_HDR + SAVE_BODY
201const CRAFT_BYTES: i64 = 3584064 // O_SAVE + SAVE_LEN
202const O_MOBAUX: i64 = 2729952 // 16 mobs x (dx,dz,dy) last-applied step, i64 triples
203 // (384B, fits the 544B rounding slack past the save image;
204 // save format untouched). NON-PERSISTED display truth.
205 // The page's heading/speed used to be a JS derivative of
206 // positions -- a workaround; the ORGAN owns motion, so it
207 // exports the applied step incl the vertical component
208 // (climb cadence needs dy).
209// GAIT-1 -- 16 mobs x 1 word FACING (it-units, IT_PI = a half turn; forward = (sin,cos) in x,z,
210// the SAME convention the camera basis at mob_draw and the wander drive already use, so this
211// engine has ONE yaw convention and not two). 128B in the same free band as O_MOBVY:
212// 2729696 + 128 = O_MOBVY, and O_EJRN ends at 2007296, so 2007296..2729696 is unallocated --
213// the region is carved exactly the way O_MOBVY was and the save format is untouched for the
214// same reason. NON-PERSISTED: a zero arena faces +z, and every write is a deterministic
215// function of arena state, so the T4/T17 two-arena checksums hold by construction.
216// ⚠WHY A STATE WORD AND NOT A DERIVATIVE OF THE LAST STEP: a heading recomputed from the
217// current step every tick IS the wobble. The steering below is an 8-direction bang-bang signal
218// whose per-axis sign can flip in a single tick, so any facing derived from it inherits every
219// one of those flips. The low-pass has to live somewhere; this is that somewhere, one word.
220const O_MOBHDG: i64 = 2729696
221const O_MOBVY: i64 = 2729824 // GE12: 16 mobs x 1 word VERTICAL VELOCITY Q8/tick (128B, the slack
222 // directly BEFORE O_MOBAUX: 2729824 + 128 = O_MOBAUX; free since
223 // O_EJRN ends at 2007296). NON-PERSISTED: a zero arena is AT REST
224 // by construction and every write derives from deterministic
225 // state, so the T4/T17 two-arena checksums hold.
226const O_SOFT: i64 = 3584064 // A4 soft-body springs: 16 mobs x SB_PTS(6, R7 regions) x SD_STRIDE words.
227 // NON-PERSISTED display truth (pure function of root motion;
228 // re-seated on init/load/shift/summon -- the MOBAUX pattern).
229const O_NEED: i64 = 3588672 // C1 needs: 16 mobs x 4 words (hunger, energy, social, spare).
230 // NON-PERSISTED; re-seeded deterministically on init/load.
231const O_MIND: i64 = 3589184 // C3/C5 THE INNER LIFE: 16 girls x 24 words -- 8 THOUGHT
232 // slots (id<<8 | mag+128, expiry-tick) then 4 GOSSIP slots
233 // (subj<<16 | pred<<8 | conf, born-tick). NON-PERSISTED;
234 // every write derives from deterministic state, so the
235 // T4/T17 two-arena checksums hold by construction.
236const O_PASS: i64 = 3592256 // THE TRAVELER'S PASSPORT (the isekai carry): the
237 // CHARACTER crosses worlds while each world keeps its own
238 // v6 save. Wire = 12 words (magic ver charseed broken
239 // placed harv plant found lost ticks worldmask ck);
240 // words 16-24 = the in-arena delta SNAPSHOT so a world
241 // reload never double-counts a deed into the ledger.
242const PASS_MAGIC: i64 = 20260802001
243const PASS_LEN: i64 = 192 // 24 wire words: [0]magic [1]ver [2]charseed [3]broken
244 // [4]placed [5]harv [6]plant [7]found [8]lost [9]ticks
245 // [10]worldmask [11]party-count [12..20]=3x(kind,disg,
246 // gene) -- COMPANIONS CROSS WORLDS with their bond and
247 // bred genome intact -- [21]ck. Snapshot at words 32+.
248const O_GENP: i64 = 3592640 // W1c GEN-TIME RECIPE OVERRIDES (192B): [0] magic, [1] n,
249 // then idx,val pairs x11. Written by the page (NXGP block)
250 // or a native harness BEFORE init_v; init applies them
251 // AFTER wc_spec identity defaults and BEFORE genworld, so
252 // terrain-shape rows (0..6, 59, 60) become world DATA.
253 // Zero region (fresh arena) = no overrides by construction.
254const GENP_MAGIC: i64 = 20260813001
255const GENP_MAXP: i64 = 11
256// ★WRITTEN AS THE ARITHMETIC, NOT AS A TYPED-OUT TOTAL. The framebuffer TAILS the arena, so the
257// total is the pre-framebuffer arena plus the frame itself. Typing the sum by hand is what let the
258// ceiling silently outgrow the wasm linear memory: a hand-computed 22,022,528 looks exactly as
259// authoritative as a correct one. As arithmetic it re-derives itself whenever W, H or O_FB move,
260// and nx_wasm_craft_gate asserts it against WASM_MEM_BYTES so it can never again exceed the module's
261// own memory without the gate going RED first.
262// ★R21 SKINNED-CHARACTER RIG REGION (wc_mob_mesh). ONE rig per arena, shared by every girl: geometry is
263// species data, pose+genome are per-girl -- the same split the body canon uses (species = parameters,
264// individuals = seeded variation). The rig TAILS the framebuffer so every existing offset is untouched.
265const O_RIG: i64 = O_FB + W*H*8
266// == sk_bytes() (256 + 32*256 + 2048*64 + 2048*24 + 64). A const cannot call a func, so the value is
267// written out ONCE here and the gate asserts RIG_BYTES == sk_bytes() -- the derived-constant discipline:
268// the duplicate exists, and it CANNOT drift without a RED.
269const RIG_BYTES: i64 = 188736
270const O_PROJ: i64 = O_RIG + RIG_BYTES
271const PROJ_MAXV: i64 = 211 // projected-vertex slots == RIG_VERT_TOTAL (declared beside the
272 // rig tables; a const cannot forward-reference, so the value is
273 // written out ONCE here and gate T67 asserts the two are EQUAL
274 // and that the built rig fits -- the same derived-constant
275 // discipline as RIG_BYTES/T62. A silent overflow here is the
276 // pmboard zero-byte class: the projection loop would write past
277 // O_PROJ into the skin scratch with no error at all.
278const PROJ_BYTES: i64 = PROJ_MAXV * 24
279const O_SKIN3: i64 = O_PROJ + PROJ_BYTES // 3-word sRGB scratch for nx_skin_ita's out3 (wasm has no
280 // mmap; every buffer is an arena offset)
281// =====================================================================================================
282// H1 -- STRAND GUIDES IN THE ENGINE (2026-08-31). Operator standing order: "i dont want js powering any of
283// this it should be emitting all the way from the first byte up via nishi lang and nishi ecosystem". The
284// per-girl hair guide simulation -- rest curves from the asset's own HSTR section, colliders FITTED from the
285// asset's own rig (VERT/SKEL/DYNA), a per-tick solver (spring-to-rest + damping + gravity + the world's wind
286// field + the girl's own motion as an inertial drag), follow-the-leader length projection alternating with
287// capsule push-out, DFTL velocity correction, and the 2-nearest-guide render weights -- lives HERE as arena
288// state. The page may do exactly two things with it: copy the asset's raw section BYTES into the scratch
289// below once at load (never a computed value), and copy the export block OUT to a GL texture each frame.
290// Every number a visitor sees on a strand is computed in this file.
291// UNITS: the NXA's bind (mesh) space, z up, integers. Blocks -> bind units through the page's own pairing
292// (HG_UNITS_PER_178CM per 1.78 m of stature; GPE_UNITS_PER_178CM in the emitter is the same pairing).
293// TICK: HG_TPS per second -- the fixed sim cadence the page's accumulator steps (16.6667 ms) and
294// nx_hairdyn_lib's hd_ticks_per_s() derives (sqrt(SB_MHZ_TICK_SQ)/1000 = 60).
295// PLANT: SB_K_HAIR / SB_C_HAIR over SD_G -- the gate-pinned hair plant of nx_softbind, unchanged, so every
296// guide answers with the stiffness and damping the retired one-chain page solver had.
297// FRAME: each guide is solved in HER bind space with the root pinned to its rest root; her world step
298// enters as the viscous drag a world-frame damper exerts (the incumbent lag at walking speed), her heading
299// rotates the world wind and step into bind space (the page's own R(-hdg).(m.x,m.z,-m.y) composition).
300// Colliders are the BIND-pose body (the same v1 limit the dress overlay declares: an extreme swing can clip).
301// =====================================================================================================
302const WC_CAST_N: i64 = 12 // the cast genmobs places (placed < WC_CAST_N); hair state is sized to it
303const HG_MOBS: i64 = WC_CAST_N
304const HG_NP: i64 = 8 // points per HSTR strand: the section contract (GR_PTS in nx_nxa_groom)
305const HG_W: i64 = HG_NP*3 // words per strand (GR_WORDS)
306const HG_NSEG: i64 = HG_NP - 1
307const HG_REND_MAX: i64 = 1200 // render strands: the page's shipped NXH_GUIDES budget, PRESERVED and moved here
308const HG_SIM: i64 = 128 // simulated guides per girl. PICKED, named as picked: 1200/128 = 9.4 render
309 // strands per guide sits inside the guide/follow band real-time hair ships
310 // (TressFX: 4..16 follow hairs per simulated guide); bounded above by the
311 // arena fit (T60) and the WebGL2 texture floor (HG_MOBS*HG_SIM/HG_TEX_SR rows)
312const HG_TEX_SR: i64 = 4 // strands per guide-texture row: rows = strands/4 keep every hair texture under
313 // the WebGL2 MAX_TEXTURE_SIZE minimum (2048) at HG_REND_MAX and HG_MOBS*HG_SIM
314const HG_TAB_W: i64 = 8 // render-strand table row: [rest-idx nb1 nb2 w1 w2 lockw spanz 0]
315const HG_CAP_MAX: i64 = 32 // collider slots (mask bits): head neck 2 shoulders 2 arms torso + DYNA anchors
316const HG_CAP_W: i64 = 10 // ax ay az bx by bz r kind sx sy
317const HG_KIND_CAP: i64 = 0
318const HG_KIND_ELL: i64 = 1
319const HG_Q12: i64 = WATER_MAGIC_4096 // ellipse-scale / segment-parameter fixed point: the engine's fx4096
320const HG_SKEL_W: i64 = 8 // words per SKEL joint: parent x y z + 4 (the 64-byte joint record the page reads)
321const HG_DYNA_MINW: i64 = 8 // a DYNA row carries side x y z k c max infl before an anchor is readable
322const HG_DYNA_MAXW: i64 = 64 // a row wider than this is not this format (nx_nxa_dyna writes 12); bounds the count check
323const HG_DYNA_INFL: i64 = 7 // DYNA word: influence radius (nx_nxa_dyna payload layout)
324const HG_HDR_BYTES: i64 = 512
325const HG_H_LOADED: i64 = 0
326const HG_H_NSTR: i64 = 1
327const HG_H_NREND: i64 = 2
328const HG_H_NSIM: i64 = 3
329const HG_H_SKIN: i64 = 4
330const HG_H_LOCKW: i64 = 5
331const HG_H_NCAP: i64 = 6
332const HG_H_SEGLEN: i64 = 7
333const HG_H_SPAN: i64 = 8
334const HG_H_TICKS: i64 = 9
335const HG_H_PUSHES: i64 = 10
336const HG_H_INSIDE: i64 = 11
337const HG_H_MAXDISP: i64 = 12
338const HG_H_H: i64 = 13
339const HG_H_ZMN: i64 = 14
340const HG_H_HJ: i64 = 15
341const HG_H_RC: i64 = 16
342const HG_H_NOCOLL: i64 = 17 // gate lever: 1 skips the push-out (the neg-control that proves it fires)
343const HG_H_RESTIN: i64 = 18 // rest nodes inside a collider BODY at load: the clipping the operator sees at rest
344const HG_H_WINDOFF: i64 = 19 // gate lever: 1 ignores the wind field
345const HG_H_GUST: i64 = 20
346const HG_H_TICKED: i64 = 21 // girls ticked on the last hairtick
347const HG_RC_NOSTR: i64 = 0 - 1 // load refusals, each naming its conjunct
348const HG_RC_HSTRCAP: i64 = 0 - 2
349const HG_RC_NOVERT: i64 = 0 - 3
350const HG_RC_VERTCAP: i64 = 0 - 4
351const HG_RC_NOSKEL: i64 = 0 - 5
352const HG_RC_SKELCAP: i64 = 0 - 6
353// arena regions: tail the skin scratch, every byte accounted, CRAFT_TOTAL re-derived below
354const O_HGHDR: i64 = O_SKIN3 + 24
355const O_HGREST: i64 = O_HGHDR + HG_HDR_BYTES
356const O_HGRL: i64 = O_HGREST + HG_REND_MAX*HG_W*8
357const O_HGCAP: i64 = O_HGRL + HG_SIM*HG_NSEG*8
358const O_HGMASK: i64 = O_HGCAP + HG_CAP_MAX*HG_CAP_W*8
359const O_HGSIMIDX: i64 = O_HGMASK + HG_SIM*8
360const O_HGTAB: i64 = O_HGSIMIDX + HG_SIM*8
361const HG_BLK_BYTES: i64 = HG_MOBS*HG_SIM*HG_W*8
362const O_HGX: i64 = O_HGTAB + HG_REND_MAX*HG_TAB_W*8 // positions
363const O_HGP: i64 = O_HGX + HG_BLK_BYTES // previous positions (velocity = X - P)
364const O_HGD: i64 = O_HGP + HG_BLK_BYTES // THE EXPORT: displacement from rest, the buffer the page copies per frame
365const O_HGSCR: i64 = O_HGD + HG_BLK_BYTES // solver scratch: correction (HG_W) + collider probe (6) + point (3)
366const HG_SCR_WORDS: i64 = HG_W + 9
367// GE32 (2026-09-02): the frame-budget telemetry window -- PF_WORDS i64 owned by nx_perf_lib, fed by the page's
368// perf_frame door once per frame, read back through the perf_* doors. Tails the hair scratch; CRAFT_TOTAL below.
369const O_PERF: i64 = O_HGSCR + HG_SCR_WORDS*8
370// GE30 PER-WORKER TILE SCRATCH. The ray pass used ONE scratch (O_ST slots 46-50) for its five wray
371// outputs, which is correct for one thread and a DATA RACE the instant a second worker renders a band
372// of the same frame: both would write the same five words and each would read the other's crossing-t.
373// Every worker therefore gets its own TILE_W-word slot -- camera basis at +0 (8 words, written by
374// wc_cam so the band pass and the overlay pass share ONE camera ruler) and the ray outs at +TILE_HOUT.
375// APPENDED at the arena tail, so no existing offset moves and the v6 save image is untouched.
376const O_TILE: i64 = O_PERF + PF_WORDS*8
377const TILE_W: i64 = 32 // i64 words per worker slot
378const TILE_HOUT: i64 = 8 // word offset of the 5 wray outs inside a slot
379const TILE_MAX: i64 = 32 // the most workers a band pass may be cut into; the thread ladder
380 // (knowledge/tier_ladder.conf) picks the count from measured
381 // hardware and the page clamps to this, so it can never ask for a
382 // scratch slot that does not exist.
383// ---- GE55 RAW UNIFORM BLOCK (2026-09-05, operator: no JS, no Python, WebGPU as a pure SUBMISSION PIPE) ----
384// The sim packs its OWN state for the GPU. 40 little-endian 32-bit words, 160 B, APPENDED at the arena tail like
385// every region before it (no existing offset moves). The words are RAW: fixed-point ints, Q12 angles, packed RGB,
386// flags. This lane carries no f32 lowering (measured 2026-09-05: nx_compile_wat has no f32 ops), so every float the
387// shader needs (cam/256, sin and cos of yaw and pitch, the palette light dl2 = .22+.78*pow(df,.6), the sky unpack,
388// the sun direction) is DERIVED ON THE GPU from the one IR (nx_world_shader_src), never in JS and never here.
389// Word index = byte offset / 4, chosen so the WGSL struct {20 scalars, pal as 3 vec4u, palf as 2 vec4u} lays out
390// IDENTICALLY under the uniform address-space rules (nx_wgsl layout is the ONE ruler; a gate pins both sides).
391// GE53 THE SURFACE SOURCE: one Q8 height per column (WX x WZ i64 slots), filled by gencol from the SAME
392// eroded, ocean-shaped field the voxel column is cut from, BEFORE the one line that rounds it to whole
393// blocks. Under P_SURF the raycaster marches this field (bilinear between columns = sub-block precision)
394// instead of the cell grid, and the page uploads it as a texture so every tier reads ONE surface. Placed
395// BEFORE the raw block so CRAFT_TOTAL == O_URAW + URAW_BYTES (T91) still holds; 128 KB inside T60's headroom.
396const O_HQ: i64 = O_TILE + TILE_MAX*TILE_W*8
397const HQ_BYTES: i64 = WX*WZ*8
398const O_URAW: i64 = O_HQ + HQ_BYTES
399const URAW_WORDS: i64 = 44 // GE53: 41 words (r_surf at 40) padded to the vec4u boundary
400const URAW_BYTES: i64 = 176 // URAW_WORDS*4: a vec4u-aligned struct, so the 3-word tail pad is real (was 160 beside WORDS=44 -- pack_uniforms zeroed 176 B into a 160 B block; corrected 2026-09-06 when the GE53 shader shipped its 41-word struct)
401const UR_CAMX: i64 = 0 // Q8 world units (the page used camx()/256)
402const UR_CAMY: i64 = 1
403const UR_CAMZ: i64 = 2
404const UR_TNOW: i64 = 3
405const UR_YAW: i64 = 4 // Q12 radians (the page used yaw()/4096)
406const UR_PITCH: i64 = 5
407const UR_SUNEL: i64 = 6 // Q12 sine of the sun elevation (cal_sunel)
408const UR_DAYT: i64 = 7
409const UR_DLEN: i64 = 8
410const UR_RAIN: i64 = 9
411const UR_SKT: i64 = 10 // packed RGB (spec word 7)
412const UR_SKH: i64 = 11 // packed RGB (spec word 8)
413const UR_SUN: i64 = 12 // spec word 9 (the GPU applies the df>.04 daylight guard)
414const UR_CLD: i64 = 13 // spec word 10
415const UR_WMAX: i64 = 14
416const UR_SELB: i64 = 15 // sel_block(S_SEL)
417const UR_HOK: i64 = 16
418const UR_NPCT: i64 = 17 // npc target t, or -1
419const UR_BROKEN: i64 = 18 // edit counters (broken + placed): the bridge refreshes the voxel texture when their sum moves
420const UR_PLACED: i64 = 19
421const UR_PAL: i64 = 20 // 12 packed RGB words (spec 16..27), vec4u-aligned at byte 80
422const UR_PALF: i64 = 32 // 5 packed RGB words (spec 34..38) at byte 128
423const UR_RESW: i64 = 37 // canvas width in px -- the door tells the sim through set_res (the sim has no window)
424const UR_RESH: i64 = 38
425const UR_SURF: i64 = 40 // Continuous terrain representation.
426const UR_WATER_Q8: i64 = 41 // Water surface from P_WATER, Q8 world units; words42..43 remain padding.
427const UR_YFLIP: i64 = 39 // 1 on the WebGPU door (top-left fragment origin), 0 on WebGL2 -- set_yflip
428// Dedicated contact scratch: two six-word bounds, one three-word result, three audit words.
429// Persisted SAVE_* ranges precede this region and remain unchanged.
430const CONTACT_BOX_WORDS: i64 = 6
431const CONTACT_RESULT_WORDS: i64 = 3
432const CONTACT_STATE_WORDS: i64 = 3
433const O_CONTACT: i64 = O_URAW + URAW_BYTES
434const CRAFT_TOTAL: i64 = O_CONTACT + (2*CONTACT_BOX_WORDS+CONTACT_RESULT_WORDS+CONTACT_STATE_WORDS)*8
435// ---- GE31/GE23 THE CAST CLIP EXTENSION (2026-09-06) --------------------------------------------
436// The ENGINE evaluates the cast's animation clip (nx_nxa_anim_lib) from each girl's own path-length
437// stride phase and exports the finished dual-quaternion joint rows; the page's animEval became a copy.
438// WHY AN EXTENSION BEYOND CRAFT_TOTAL RATHER THAN A REGION INSIDE IT: (1) T91 pins O_URAW as the arena
439// tail and T60 pins CRAFT_TOTAL inside the backend's DECLARED pages; (2) the vm-gate runs init and
440// render inside those declared pages, and nothing here is touched until the page has grown memory
441// and called nxa_ingest; (3) the clip does not fit anyway -- ref9e's ANIM section is 113,465 words
442// (nx_asset_floor_gate, 2026-09-06), 887 KB against a 282 KB headroom, so a region inside the base
443// arena would have been a lie about the asset. The backend declares WASM_PAGES initial pages and cannot
444// read a module static (G3, see WASM_PAGES above), so the size gets ONE owner the honest way: the
445// engine exports wasm_pages_req() DERIVED from CRAFT_EXT_TOTAL and the page grows memory to it before
446// init -- the MT twin already declares max = 2x, so growth is inside its ceiling by construction.
447// Every cap below is named for its purpose, derived from the SHIPPED asset, and refused BY NAME in
448// wc_nxa_ingest when exceeded; an asset over a cap is the next ladder rung, never a silent truncation.
449const NXA_NJ_CAP: i64 = 128 // ref9e 104 joints; the corpus tops out at 370 (nx_nxa_play) = the next rung
450const NXA_ANIM_CAP_W: i64 = 131072 // 1 MiB of key words; ref9e ANIM measured 113,465 words
451const NXA_POSE_CAP_W: i64 = 2048 // ref9e POSE measured 835 words (one frozen stand pose)
452const NXA_HDR_W: i64 = 16
453const NXA_H_LOADED: i64 = 0
454const NXA_H_NJ: i64 = 1
455const NXA_H_DUR: i64 = 2
456const NXA_H_MPB: i64 = 3
457const NXA_H_RJ: i64 = 4
458const NXA_H_POSE: i64 = 5
459const NXA_H_RV: i64 = 6 // six words: x0 y0 vx16 vy16 t0 span (nx_nxa_anim_lib NA_RV_W)
460const NXA_H_RC: i64 = 12
461const NXA_H_NAW: i64 = 13
462// Formerly unused header words; existing region offsets remain unchanged.
463const NXA_H_NPW: i64 = 14
464const NXA_H_MORF_TOKEN: i64 = 15
465const NXA_MOB_W: i64 = 4 // per girl: idle weight q12, clip-time adjustment ms, two spare
466const NXA_M_IW: i64 = 0
467const NXA_M_CTADJ: i64 = 1
468// the page's SHIPPED idle behaviour, carried not re-chosen (nx_game_page_emit castFrame, 2026-08-30):
469// pose-hold eases in at 5/s and out at 2.5/s, the clip eases to the nearest double-support at 6/s
470// while the hold blends in below 0.95, and a hold under 0.004 snaps to zero.
471const NXA_IW_IN_TENTHS_PER_S: i64 = 50
472const NXA_IW_OUT_TENTHS_PER_S: i64 = 25
473const NXA_SNAP_TENTHS_PER_S: i64 = 60
474const NXA_SNAP_IW_MAX_Q12: i64 = 3891
475const NXA_IW_FLOOR_Q12: i64 = 16
476const NXA_DT_MS_MAX: i64 = 1000 // a tab that slept a minute eases one second, it does not slam
477const NXA_RC_NOT_LOADED: i64 = 0 - 1
478const NXA_RC_NO_MOB: i64 = 0 - 2
479const NXA_RC_SLOT: i64 = 0 - 3
480const NXA_RC_NJ_ZERO: i64 = 0 - 11
481const NXA_RC_NJ_CAP: i64 = 0 - 12
482const NXA_RC_NAW_ZERO: i64 = 0 - 13
483const NXA_RC_NAW_CAP: i64 = 0 - 14
484const NXA_RC_NPW_CAP: i64 = 0 - 15
485const NXA_RC_POSE_OVERRUN: i64 = 0 - 16
486const NXA_RC_TRACKS: i64 = 0 - 20 // plus nx_nxa_anim_lib's own rc: -21 bad tracks, -22 overrun
487// Dedicated compiler-static reservation: one WebAssembly allocation page.
488// Build the plain and shared doors with the source-exported arena/static limits.
489// The compiler MUST refuse actual static data beyond this end; a page budget is
490// not a claim that future globals fit. Native importers keep ordinary globals.
491const CRAFT_STATIC_RESERVE_PAGES: i64 = 1
492const CRAFT_STATIC_BASE_PAGES: i64 = WASM_PAGES
493const CRAFT_STATIC_LIMIT_PAGES: i64 = CRAFT_STATIC_BASE_PAGES+CRAFT_STATIC_RESERVE_PAGES
494const CRAFT_STATIC_BASE: i64 = CRAFT_STATIC_BASE_PAGES*WASM_PAGE_BYTES
495const CRAFT_STATIC_LIMIT: i64 = CRAFT_STATIC_LIMIT_PAGES*WASM_PAGE_BYTES
496const O_NXA: i64 = CRAFT_STATIC_LIMIT
497const O_NXA_SKEL: i64 = O_NXA + NXA_HDR_W*8
498const O_NXA_TIDX: i64 = O_NXA_SKEL + NXA_NJ_CAP*NA_SKEL_W*8
499const O_NXA_PQ: i64 = O_NXA_TIDX + NXA_NJ_CAP*NA_IDX_W*8
500const O_NXA_PD: i64 = O_NXA_PQ + NXA_NJ_CAP*4*8
501const O_NXA_MOB: i64 = O_NXA_PD + NXA_NJ_CAP*3*8
502const O_NXA_SCR: i64 = O_NXA_MOB + WC_CAST_N*NXA_MOB_W*8
503const O_NXA_OUT: i64 = O_NXA_SCR + NA_SCR_W*8
504const O_NXA_POSE: i64 = O_NXA_OUT + WC_CAST_N*NXA_NJ_CAP*NA_ROW_W*8
505const O_NXA_ANIM: i64 = O_NXA_POSE + NXA_POSE_CAP_W*8
506// Append the ordering sidecar so all existing asset and output offsets remain stable.
507const O_NXA_ORDER: i64 = O_NXA_ANIM + NXA_ANIM_CAP_W*8
508const CRAFT_EXT_TOTAL: i64 = O_NXA_ORDER + NXA_NJ_CAP*8
509// the engine's OWN page request -- derived, the one place the extended size is written
510const WASM_PAGES_REQ: i64 = (CRAFT_EXT_TOTAL + WASM_PAGE_BYTES - 1)/WASM_PAGE_BYTES
511// LOAD-TIME INPUT SCRATCH inside the framebuffer: the page copies the asset's raw HSTR/VERT/SKEL/DYNA section
512// bytes here and calls hairload, which consumes them before it returns; the next render overwrites the frame.
513// The caps are addresses inside a region the engine already owns (W*H*8 = 18.4 MB), not guesses about an
514// asset: DYNA 1 MiB holds 10,922 rows, HSTR 4 MiB 21,845 strands, VERT 8 MiB 349,525 vertices, SKEL 2 MiB
515// 32,767 joints. hairload REFUSES by name when a count exceeds its cap rather than reading past it.
516const HG_MIB: i64 = 1048576
517const HG_SCR_HSTR: i64 = O_FB
518const HG_SCR_HSTR_CAP: i64 = 4*HG_MIB
519const HG_SCR_VERT: i64 = O_FB + 4*HG_MIB
520const HG_SCR_VERT_CAP: i64 = 8*HG_MIB
521const HG_SCR_SKEL: i64 = O_FB + 12*HG_MIB
522const HG_SCR_SKEL_CAP: i64 = 2*HG_MIB
523const HG_SCR_DYNA: i64 = O_FB + 14*HG_MIB
524const HG_SCR_DYNA_CAP: i64 = HG_MIB
525// plant + units
526const HG_TPS: i64 = 60 // see the header: the page accumulator's 16.6667 ms, hd_ticks_per_s()
527const HG_UNITS_PER_178CM: i64 = 171530 // the page's pairing (GPE_UNITS_PER_178CM), named as the same number
528const HG_CM_178: i64 = 178
529const HG_CM_PER_M: i64 = 100
530const HG_UPB: i64 = HG_UNITS_PER_178CM*HG_CM_PER_M/HG_CM_178 // bind units per world block (1 block = 1 m): 96365
531const HG_G_CMS2: i64 = 981 // standard gravity, cm/s^2
532const HG_G: i64 = HG_G_CMS2*HG_UNITS_PER_178CM/(HG_CM_178*HG_TPS*HG_TPS) // 262 units/tick^2 -- the dress lane's NXGD_G derivation
533const HG_FTL_S_PERMIL: i64 = 1000 - SB_C_HAIR*1000/SD_G // DFTL s_damping (Mueller 2012 "Fast Simulation of Inextensible Hair
534 // and Fur", band .9..1): 942, from the plant's own damping, not picked
535const HG_FENCE_DIV: i64 = 4 // the chain's small-angle validity fence: seglen/4 (SD_Q8/4 in the retired page solver)
536const HG_PROJ_ITERS: i64 = 3 // length/collision alternations per point; the LAST op is always the length projection
537const HG_LOCK_W_MIN: i64 = 900 // the ribbon builder's lock half-width floor (w09 = max(900, span*.045)), PRESERVED
538const HG_LOCK_W_PERMIL: i64 = 45
539const HG_SKIN_NUM: i64 = 16 // skin = lockw x 1.6: half-width + the .6 child scatter -- the farthest a render vertex sits off its guide
540const HG_SKIN_DEN: i64 = 10
541const HG_REACH_DIV: i64 = 2 // collider mask reach = strand length / 2: twice the static fence (L/4), for overshoot
542const HG_GUST_TICKS: i64 = 2*HG_TPS // gust envelope cadence 0.5 Hz: the incumbent shader sway (3.1 rad/s), PRESERVED
543const HG_GUST_SALT: i64 = 3400 // whash seed offset (the weather lib salts with seed + 3300)
544const HG_TORSO_GATE_X: i64 = 15000 // the MFS torso gate (axb < 15000.), the same half-width the paint bands use
545// Drillis-Contini stature ratios (permil of the MEASURED stature), the landmarks the page derives its bands from
546const HG_R_HEADBAND: i64 = 885
547const HG_R_HEAD_J: i64 = 955
548const HG_R_ACROMION: i64 = 818
549const HG_R_CHEST: i64 = 720
550const HG_R_HIP: i64 = 520
551const HG_R_ELBOW: i64 = 630
552const HG_R_NECK_LO: i64 = 840
553const HG_R_SH_LO: i64 = 770
554const HG_R_SH_HI: i64 = 860
555const HG_R_ARM_LO: i64 = 600
556const HG_R_ARM_HI: i64 = 800
557const HG_R_ARM_XMIN: i64 = 60
558const HG_R_ELBOW_XMIN: i64 = 50
559
560// C3 thought ids (RimWorld's inspectable-mood law: a mood is a LEDGER, never a scalar mystery)
561const TH_RAIN: i64 = 1
562const TH_FEAR: i64 = 2
563const TH_MET: i64 = 3
564const TH_SLEPT: i64 = 4
565const TH_HUNGRY: i64 = 5
566const TH_SAWTAKEN: i64 = 6
567const TH_HEARD_TAKEN: i64 = 7
568const TH_HEARD_FRIEND: i64 = 8
569const TH_COMPANY: i64 = 9
570// C5 gossip predicates (Talk of the Town's law -- the differentiator no shipped game has)
571const GO_FRIEND: i64 = 1
572const GO_TAKEN: i64 = 2
573const SAVE_MAGIC: i64 = 20260728001
574const SAVE_VER: i64 = 6 // v6 = STREAMING WORLD (origin + edit journal in the image);
575 // v5 still LOADS (origin 0, empty journal); others REFUSED
576const SAVE_VER5: i64 = 5
577// mob components (nx_entity_store comp slots)
578const MC_X: i64 = 0
579const MC_Y: i64 = 1
580const MC_Z: i64 = 2
581const MC_KIND: i64 = 3
582const MC_PH: i64 = 4
583const MC_DISG: i64 = 5 // 1 = a HUMAN girl disguised as a monster girl (the lore:
584 // monster girls took the world; humans hide among them --
585 // her features are a worn costume, not grown)
586const MC_GENE: i64 = 6 // 20-bit APPEARANCE GENOME rolled at spawn -- every girl is
587 // GENERATED, not hand-built: bits 0-2 hair hue, 3-4 hair
588 // length, 5-6 height, 7-8 outfit tint, 9-10 skin tone,
589 // 11-12 feature size. The slot bred inheritance plugs into.
590
591// state slots
592const S_SEED: i64 = 0
593const S_CX: i64 = 1 // camera pos Q8 (256 = one block)
594const S_CY: i64 = 2
595const S_CZ: i64 = 3
596const S_YAW: i64 = 4 // it-units (IT_PI = half turn)
597const S_PITCH: i64 = 5
598const S_T: i64 = 6
599const S_BROKEN: i64 = 7
600const S_PLACED: i64 = 8
601const S_HX: i64 = 9 // crosshair DDA hit cache
602const S_HY: i64 = 10
603const S_HZ: i64 = 11
604const S_HFACE: i64 = 12 // 0 none, 1 +x, 2 -x, 3 +y, 4 -y, 5 +z, 6 -z
605const S_HOK: i64 = 13 // 1 = in reach
606const S_VY: i64 = 14 // vertical velocity Q8/tick (jump + gravity)
607const S_GROUNDED: i64 = 15 // 1 = standing on a surface (jump allowed)
608const S_SEL: i64 = 16 // hotbar slot 0..4 (Q cycles; sel_block maps to a block type)
609const S_LBX: i64 = 17 // last-broken cell (probes/particles; the hit cache retargets
610const S_LBY: i64 = 18 // every frame, so "what did I just break" needs its own slots)
611const S_LBZ: i64 = 19
612const S_Q: i64 = 20 // ray pixel size 2..5 -- ADAPTIVE: the organ tunes itself from
613const S_FMA: i64 = 21 // the surface's reported frame ms (EMA x16); shim only reports
614const S_WMAX: i64 = 22 // highest solid y in the world -- rays above it heading up/flat
615 // are SKY immediately (kills the 110-step horizon marches)
616const S_SPX: i64 = 23 // spawn point (H key + void-fall auto-respawn return here)
617const S_SPY: i64 = 24
618const S_SPZ: i64 = 25
619const S_NPCT: i64 = 26 // crosshair NPC target: dense index of the girl under the
620 // gaze (occlusion-aware, walls block), -1 = none
621const S_FOUND: i64 = 27 // disguised humans FOUND (met + identified = under protection)
622const S_LOST: i64 = 28 // found humans TAKEN by wardens (the cost of not protecting)
623const S_BCD: i64 = 29 // birth cooldown ticks (community pacing)
624const S_WOX: i64 = 30 // WORLD ORIGIN of the window, in blocks (v6 streaming): the
625const S_WOZ: i64 = 31 // arena is a 128x48x128 CACHE over unbounded absolute terrain
626const S_EJDROP: i64 = 32 // edits REFUSED because the journal was full (loud, never silent)
627const S_HARV: i64 = 33 // MATURE crops harvested (the farming loop's payoff counter)
628const S_PLANT: i64 = 34 // seeds planted
629const S_GROWN: i64 = 35 // crops that reached maturity (world truth, gate-readable)
630const S_VAR: i64 = 36 // which world identity this arena runs (the passport's
631 // visited-mask bit; set once at init)
632const S_GENP: i64 = 37
633const S_TGT: i64 = 38 // DISPLAY-DERIVED frame budget, EMA-x16 units (0 = shipped
634 // defaults): the page measures the device's real rAF interval
635 // once and reports it via target_ms; every controller line then
636 // derives from the DEVICE instead of a hand-picked millisecond // W1c: gen-time override rows APPLIED at init (world truth --
637 // a gate can read whether the recipe actually reached genworld)
638const S_BLDG: i64 = 39 // W3 settlements: buildings stamped into this arena (a
639 // monotone stamp-event counter -- a window slide that
640 // repaints a building recounts it; right after init it IS
641 // the number of buildings in the window, which is what the
642 // gate reads). NON-PERSISTED world truth.
643const S_BLDGX: i64 = 40 // last-stamped building anchor, arena-local (gate probe)
644const S_BLDGY: i64 = 41 // its floor height
645const S_BLDGZ: i64 = 42
646const S_RESW: i64 = 44 // GE55: canvas size and origin, written by the door (set_res / set_yflip)
647const S_RESH: i64 = 45
648const S_YFLIP: i64 = 46
649const S_AGEN: i64 = 47
650const S_DPAPPLIED: i64 = 48 // GE59: the P_DAYPHASE value last applied to S_T (0 = never) -- one re-base per distinct poke, never per tick // GE57: arena GENERATION -- +1 per wc_shift that moves. The GPU tiers key every voxel-texture upload on it: a 16-block re-base drawn against the previous texture is the transport/fall-through the operator sees (2026-09-05).
651const S_GT_KEEP: i64 = 43 // ground-truth capture: when 1, render_impl leaves the depth plane in
652 // the framebuffer's high bits instead of stripping it (nx_world_snap
653 // gt verb reads it and emits depth/normal channels). Zeroed by init, so
654 // the page and every gate keep the published colour-only format.
655const SHIFT_STRIDE: i64 = 16 // one window slide, in blocks
656const SHIFT_MARGIN: i64 = 32 // player this close to a window edge -> the world slides under them
657
658// spec slots (the game-identity DATA the engine reads -- nx_voxel_world's style-is-a-spec doctrine)
659const P_TBASE: i64 = 0 // terrain base height
660const P_TAMP1: i64 = 1 // large-noise amplitude
661const P_TAMP2: i64 = 2 // detail-noise amplitude
662const P_WATER: i64 = 3 // flood level
663const P_SNOW: i64 = 4 // snow line (99 = never)
664const P_TREE: i64 = 5 // tree sparsity modulus (0 = no trees)
665const P_CAVETH: i64 = 6 // cave carve threshold (lower = more cavern)
666const P_SKYTOP: i64 = 7 // packed zenith colour
667const P_SKYHOR: i64 = 8 // packed horizon colour
668const P_SUN: i64 = 9 // 1 = sun disc
669const P_CLOUD: i64 = 10 // 1 = cloud deck
670// WEATHER EXPORTS (2026-08-26): written each tick by wc_weather_tick from nx_weather_lib -- the
671// gate-proven continuous system (rates preserved to P_RAINS, front persistence, typed precip,
672// gradient wind). The page reads these five slots exactly as it reads the sky tones.
673const P_WXCOV: i64 = 11 // cloud coverage Q12 (drives the cloud density band)
674const P_WXWINDX: i64 = 12 // wind x component, Q12-scaled speed*cos(dir)
675const P_WXWINDZ: i64 = 13 // wind z component
676const P_WXTYPE: i64 = 14 // precip type this eighth: 0 none, 1 rain, 2 snow
677const P_WXTEMP: i64 = 15 // temperature Q12 (relative scale, freezing=1024)
678const P_PAL: i64 = 16 // +blocktype = packed base colour (0..11)
679const P_MOBC: i64 = 28 // +kind*2+half = packed mob colours (3 kinds x 2 tones)
680const P_PAL2: i64 = 34 // +b-12 = packed colour for farm blocks 12..16 (5 rows, 34-38)
681const P_DAYLEN: i64 = 40 // A1 calendar: ticks per day (ALL timing is spec DATA)
682const P_SEASD: i64 = 41 // days per season (4 seasons cycle)
683const P_GROWE: i64 = 42 // farm-tick cadence: one grow/hydrate pass every N ticks
684const P_GROWW: i64 = 43 // crop speed on WET farmland (Minecraft stencil speed)
685const P_GROWD: i64 = 44 // crop speed on DRY farmland
686const P_RAINS: i64 = 45 // +season = rain permil per day-eighth (4 rows, 45-48)
687// ---------------------------------------------------------------------------------------------
688// ART STYLE IS DATA (2026-09-01). Spec idx 49 -- one of the TWO dead holes this plane has carried
689// since it was laid out (39 and 49; world_recipes.conf names them both). 49 is the safer of the
690// two: P_PAL2's five farm rows 34-38 could plausibly widen by one, while P_RAINS' four rows are
691// four SEASONS and cannot. It sits inside the 7..58 band the recipe plane pokes POST-BOOT, which
692// is where a LOOK belongs -- a style is a property of how the world is drawn, never of how the
693// ground was generated, so it must not become gen-time data.
694// THE VOCABULARY IS ADOPTED, NOT INVENTED. buildroot/runtime/nx_voxel_world.nx line 2 has read
695// "Style is a spec field, NOT a hardcode -- the engine is not locked to one look" since it was
696// written, with const SP_STYLE and STYLE_REAL / STYLE_TOON / STYLE_FLAT, and
697// _hdl_build/nx_world_style_gate.nx already PROVES the three produce three DISTINCT frames from
698// one spec. That organ has SEVEN importers and EVERY ONE OF THEM IS A GATE (measured 2026-09-01,
699// nx_absent matches=8 coverage_complete=1 corpus_complete=1): the doctrine was proven and never
700// shipped. This is that doctrine reaching the SERVED engine, under the SAME three ids so the two
701// implementations cannot drift into two vocabularies for one idea.
702// SCOPE, STATED SO IT CANNOT BE OVERREAD: this is the SHADING axis. The world is still made of
703// voxels -- vox_off() -> O_VOX is still the only world door, and a second REPRESENTATION is a
704// separate, larger contract. A toon or flat world is a voxel world that stops looking photoreal;
705// it is not a world that stopped being cubes.
706// 0 = REAL, and 0 is what wc_spec's zeroing loop (while k < WC_SPECN) already writes for every
707// identity, so every world published before this renders BYTE-IDENTICALLY BY CONSTRUCTION rather
708// than by a preserved branch anyone could later delete.
709const P_STYLE: i64 = 49
710const P_DAYPHASE: i64 = 39 // GE59 (2026-09-05): the boot clock as DATA -- the OTHER dead hole (world_recipes.conf names 39 and 49). Post-boot band, so it cannot be read at init: apply2_impl re-bases S_T to it on the next tick, once per distinct value; 0 (the zeroing loop) leaves the DAYLEN/4 boot phase, so every existing world is byte-identical by construction. If P_PAL2 ever widens, this slot moves with the ONE named const.
711const WC_STYLE_REAL: i64 = 0 // textured, smooth light -- the shipped look, unchanged
712const WC_STYLE_TOON: i64 = 1 // banded light (anime/cel)
713const WC_STYLE_FLAT: i64 = 2 // untextured facets (artsy low-poly)
714const WC_STYLE_SOFT: i64 = 3 // SMOOTH TERRAIN: ground lit by a heightfield normal interpolated across the block (no grid bevel, no per-block facet)
715// SOFT neighbour scan: how far above/below the hit cell a neighbour column's top is searched. Bounded by
716// where the heightfield normal SATURATES -- a rise of 3 blocks over 1 already lights as a near-vertical
717// face, so a taller step is a cliff and reads correctly as the flat fallback. Derived, not tasted.
718const WC_SOFT_SCAN: i64 = 3
719const WC_STYLE_MAX: i64 = 3 // the highest id this engine owns; set_style REFUSES above it
720// nx_voxel_world's toon_band works on a 0..255 "bright"; wshade2 carries light in PERMIL
721// (wface_l returns 420..1000). Each of its three constants is therefore converted x1000/255 and
722// NOTHING here is tasted: 150 -> 588.2 -> 588, 105 -> 411.8 -> 412, 235 -> 921.6 -> 922.
723const WC_TOON_CUT: i64 = 588
724const WC_TOON_LO: i64 = 412
725const WC_TOON_HI: i64 = 922
726// FLAT is DERIVED, not chosen. The texture term enters this shader as
727// light = light*(870 + tex*260/256)/1000
728// which is exactly 1.000 at tex = 128, so 128 IS this shader's own no-op texel and "flat" is
729// spelled "hold tex at the value that makes the texture term vanish". No second constant is
730// introduced, and the incumbent does the same thing from the other side: its texel_col computes
731// its noise term ONLY under STYLE_REAL and adds zero otherwise.
732const WC_TEX_NEUTRAL: i64 = 128
733const P_ADV: i64 = 50 // +i = smart-object ADVERTISEMENTS (C1): packed
734 // block<<16 | need<<8 | strength; 6 rows 50-55, 0 = end.
735 // NPC minds read OBJECTS as data -- adding a row changes
736 // village life with zero new NPC code (The Sims' law).
737const P_HISTAGE: i64 = 60 // DECLARED geomorphic stage (Strahler bands): 0 = mature/
738 // equilibrium (HI 300-600 permil), 1 = youthful (HI >= 600).
739 // A world DECLARES its stage and gate T53 checks the
740 // MEASUREMENT matches -- widening one band until everything
741 // fits would hide a young landscape. (Ported 2026-08-02:
742 // existed only on the laptop line; the NAS gate ran 52 teeth
743 // while local ran 53 -- the LOCAL-IS-NOT-A-SUPERSET fork.)
744const P_TREEMAX: i64 = 59 // tree altitude ceiling (0 = the historic hardcoded 19)
745const P_TREESPEC: i64 = 61 // W2 SPECIES GENOME (packed, 0 = legacy 4-block stamp):
746 // bits 0-3 trunk base, 4-7 trunk variance, 8-11 canopy
747 // radius (<=4, the widened seam scan bound), 12-14 shape
748 // (0 legacy, 1 dome, 2 pine), 15-17 leaf-drop density.
749 // Bits 18-20 UNDERSTORY density + 21-22 kind (0 tufts,
750 // 1 shrubs, 2 mixed) -- W2b ground vegetation in the same
751 // genome; tree bits 0..17 zero = legacy forest preserved.
752 // A world declares its FOREST the way it declares its
753 // terrain -- species = parameters, individuals = seeded
754 // variation inside the envelope (the Infinigen law).
755const P_WARD: i64 = 58 // warden daytime hunt radius in BLOCKS (0 = the 12-block
756 // default). A world declares its own danger; the arriving
757 // traveler's LEVEL scales it further (isekai: new world,
758 // new challenge, and the challenge KNOWS who showed up).
759const P_OUTFIT: i64 = 57 // outfit mode: 0 = identity keeps everyone clothed;
760 // 1 = MIXED (beach): genome bits 18-19 pick each girl's
761 // beachwear -- clothed / topless / nude -- stable per
762 // girl, bred like every trait. Identity DATA decides
763 // whether the dimension is active at all.
764const P_CURI: i64 = 56 // curiosity threshold: a girl approaches the player only
765 // while her loneliness exceeds this (HABITUATION -- the
766 // operator's "they just follow me around": company
767 // satisfies, satisfied girls walk on with their lives.
768 // Fear never habituates; shy girls always keep distance).
769
770// GAME-FEEL TUNABLES -- every one carries a row in knowledge/gamefeel_oracle.conf (banked
771// reference bands: biomechanics, shipped-sim constants, modding-community defaults) and
772// nx_gamefeel_oracle_gate REFUSES any value outside its cited band. Feel is derived, not tasted.
773const P_BLDG: i64 = 62 // W3 settlement density: site-cell modulus (0 = none; the
774 // recipe plane can override it, idx 62 is gen-time data)
775const P_BLDGSPEC: i64 = 63 // low 4 bits = archetype row in nx_indoorgen_data
776const P_ERODE: i64 = 64 // E1 TALUS EROSION BUDGET in relaxation ticks (0 = OFF).
777 // Gen-time recipe DATA (world_recipes.conf spec idx 64),
778 // applied to the spec BEFORE genworld reads it. 0 does not
779 // merely default to nothing: it takes the branch out
780 // entirely, so a world that does not opt in generates the
781 // byte-identical terrain it generated before this existed.
782const P_ERTAL: i64 = 65 // DERIVED talus threshold, WC_ER_Q units. NEVER authored:
783 // wc_er_talus MEASURES it as the terrain's own mean per-cell
784 // largest 4-neighbour drop -- wp_erode_talus_derived's rule
785 // -- so material sheds where the ground is steeper than the
786 // ground's own average and no repose angle is picked by
787 // taste. Sentinels: 0 = not yet measured, WC_ER_FLAT = -1 =
788 // measured and the world has NO relief, which is the case
789 // wp_erode_bake_derived REFUSES rather than reporting a bake
790 // it did not do.
791// GE13b -- CLOTHING IS DATA (2026-08-30). The 3-value outfit (0 clothed / 1 topless / 2 nude) WAS
792// the whole wardrobe, and SWIMWEAR-ONLY rendered identically to a clothed village because no
793// swimwear garment existed anywhere in the engine (operator: "random dresses not beach outfits").
794// The wardrobe is now a GARMENT TABLE in this same spec plane: rows P_GARM .. P_GARM+GAR_N-1, one
795// packed word per garment, seeded by wc_spec for EVERY identity before its branch (an identity or a
796// recipe row overrides a garment exactly the way it overrides the sky). Garment id 0 = nothing worn
797// and is not a row; id i lives at sp[P_GARM + i - 1]. A ZERO row means "this garment does not exist
798// here" -- the selector then hands out nothing in that slot, which is what makes the gate's
799// missing-swim-row neg-control bite instead of silently reading a bare word as a garment.
800// bits 0-1 COVERAGE bit0 covers the top, bit1 the bottom: 1 top / 2 bottom / 3 full (one-piece,
801// dresses). The legacy 0/1/2 is DERIVED from the worn set's OR of these bits.
802// bits 2-4 CATEGORY 0 beach-swim 1 beach-cover 2 casual 3 evening
803// bits 8-16 HUE BASE degrees 0..359, where this garment's palette starts
804// bits 17-22 HUE SPAN degrees/4: genome bits 7-8 (the documented OUTFIT-TINT bits, MG_OUTFIT_SH)
805// pick one of four stops across it -- a girl's swimsuit colour is BRED like
806// her hair, and a bikini top and bottom share the stop, so the set matches
807// bits 23-26 SATURATION /15 bits 27-30 LIGHTNESS /15 (integer HSL, wc_hsl_rgb)
808// Index 69 stays UNOWNED on purpose: nx_world_recipe_gate T19 pins "spec idx 69 refuses" as the
809// recipe validator's upper edge, and putting a garment there would turn a pinned edge into a row.
810const P_GARM: i64 = 70
811const GAR_N: i64 = 9
812const GAR_BIKINI_TOP: i64 = 1
813const GAR_BIKINI_BOT: i64 = 2
814const GAR_ONEPIECE: i64 = 3
815const GAR_SARONG: i64 = 4
816const GAR_SUNDRESS: i64 = 5
817const GAR_TEE: i64 = 6
818const GAR_SHORTS: i64 = 7
819const GAR_SKIRT: i64 = 8
820const GAR_DRESS: i64 = 9
821const GAR_COV_TOP: i64 = 1
822const GAR_COV_BOT: i64 = 2
823const GAR_COV_FULL: i64 = 3
824const GAR_CAT_SWIM: i64 = 0
825const GAR_CAT_COVER: i64 = 1
826const GAR_CAT_CASUAL: i64 = 2
827const GAR_CAT_EVENING: i64 = 3
828const GAR_CAT_NONE: i64 = 4 // what mobgarc reports for a girl wearing nothing
829const GAR_CAT_SH: i64 = 2
830const GAR_CAT_MASK: i64 = 7
831const GAR_HUE_SH: i64 = 8
832const GAR_HUE_MASK: i64 = 511
833const GAR_SPAN_SH: i64 = 17
834const GAR_SPAN_MASK: i64 = 63
835const GAR_SPAN_UNIT_DEG: i64 = 4
836const GAR_SAT_SH: i64 = 23
837const GAR_LIT_SH: i64 = 27
838const GAR_NIB_MASK: i64 = 15
839const GAR_TINT_STOPS: i64 = 4 // MG_OUTFIT_MASK + 1: two genome bits, four stops
840const GAR_SLOT_SH: i64 = 8 // outfit word = upper id << GAR_SLOT_SH | lower id
841const GAR_ID_MASK: i64 = 255
842const HSL_DEG_FULL: i64 = 360
843const HSL_SECTOR_DEG: i64 = 60
844const MG_BEACH_SH: i64 = 18 // the beachwear genome bits the MIXED beach breeds (P_OUTFIT)
845const MG_BEACH_MASK: i64 = 3
846const MOB_POSE_SLEEP: i64 = 2 // mob_pose's published sleep id (the pose door's contract)
847const B_WATER: i64 = 4 // the water block (wshade2's shimmer branch, the shore ramp)
848const WC_SPECN: i64 = 79 // spec words the engine owns: 69 -> 79 for the GE13b wardrobe
849 // rows 70-78 (69 left unowned, see P_GARM). Was a bare 64 inside wc_spec.
850 // O_EJRN - O_SPEC = 640 B = 80 words, so this grows without
851 // moving a single other offset (the same law O_GENP was
852 // placed under).
853// GE13 -- THE OCEAN IS DATA (wsp_beach_ocean). One packed spec row turns any identity's far
854// side into a sea: bits 0-1 EDGE (0=+z 1=-z 2=+x 3=-x), bits 2-11 SHORELINE absolute
855// coordinate + 512 (WORLD space, so the streaming window regenerates it consistently),
856// bits 12-17 SLOPE width in blocks (the shore ramps down across this run), bits 18-23
857// SEABED height. 0 = no ocean: wsp_beach_ocean returns the height UNTOUCHED, so every
858// ocean-less identity generates byte-identically BY CONSTRUCTION (the KAT the gate holds).
859const P_OCEAN: i64 = 66
860// GE14a -- THE STAGED PROCGEN BIND. 0 = OFF, and OFF is the LEGACY TERRAIN BYTE-FOR-BYTE by
861// construction (wheight_raw returns before touching any of it). Non-zero = ON, and the value IS
862// the VERTICAL DIVISOR that maps nx_worldpipe_core's height space into this engine's block
863// column -- one row carrying both the switch and the scale, the shape P_ERODE already uses.
864// WHY A DIVISOR AND NOT A TASTED CONSTANT: the core's spline runs about -430..+420 before
865// relief, while a column here is 1..WY-8 blocks, so SOME map is required and the only honest
866// place for it is the recipe -- a world declares how much of its own vertical band it wants to
867// use, and nx_wasm_craft_gate asserts the resulting spread actually FILLS that band instead of
868// clamping flat at either end (a divisor that collapses the world is a measurable defect, not a
869// matter of taste).
870const P_WPIPE: i64 = 67
871// GE14a -- THE HORIZONTAL SCALE, and it is not a cosmetic knob: it is the unit conversion
872// between two coordinate systems, and MEASUREMENT is what proved it necessary. The staged
873// core's parameter fields have wavelengths of 1300..3400 units (continentalness the longest),
874// while a world window here is 128 BLOCKS. At 1 unit per block the whole window samples
875// essentially ONE POINT of the continent field, so the spline contributes a constant and only
876// the short ridge/detail terms vary: T79 measured spread 9 at divisor 30 and spread 10 at
877// divisor 18 -- a 40 percent smaller divisor bought ONE BLOCK, which is the signature of a
878// term that is constant across the sample, not of a scale that needs tuning. No vertical
879// divisor can fix that; the window has to span more of the field. 0 or 1 = one unit per block
880// (the legacy sampling); N = N units per block, so a 128-block window spans 128*N units.
881const P_WPSCALE: i64 = 68
882const P_SURF: i64 = 69 // GE53 SURFACE SOURCE: 0 = the cell grid (all voxel, byte-identical to
883 // every world shipped before this row), 1 = the continuous heightfield
884 // (no voxel ground: the ray marches the Q8 field). An identity declares
885 // it as DATA in wc_spec. All voxel or no voxel -- there is no partial.
886// The field is bilinear BETWEEN columns, so a sample a quarter block apart can never skip a column: the
887// marcher's step and the gradient's baseline are both this one span (Q8 units). DERIVED from the field's
888// own resolution (one column per block), not tuned.
889const WC_SURF_STEP_Q8: i64 = 64
890const WC_GAIT_BOB_Q8: i64 = 7 // thorax oscillation AMPLITUDE (~2.7cm, 5.5cm p2p --
891 // the band is peak-to-peak/2; 14 was a p2p-vs-amplitude
892 // conflation the recorder exposed as 11.3cm of chest)
893// RESPIRATION -- the idle drive. Derived, not tasted: resting adult breathing is 12-16/min;
894// at 14/min on the fixed 60Hz tick that is 60*60/14 = 257 ticks per cycle (0.233 Hz, inside the
895// 0.20-0.30 Hz band this rung is gated on). Amplitude is scaled off the GAIT constant above so
896// the two drives share one ruler: 7 q8 ~ 2.7cm => 1 q8 ~ 0.386cm, so 2 q8 ~ 0.77cm, inside the
897// declared 0.4-0.8cm resting-excursion band. A third value would have been a guess; this is an
898// arithmetic consequence of a constant already cited.
899const WC_BREATH_TICKS: i64 = 257
900// ★ AMPLITUDE, NOT PEAK-TO-PEAK -- and I got this wrong ONCE ALREADY on the gait constant.
901// Conversion, derived from the cited gait row: 7 q8 amplitude is documented as ~2.7cm, and
902// 7/256*100cm-per-block = 2.73cm, so the unit is q8 world units and p2p = 2*amp/256*100 cm.
903// At 2 q8 that is 1.56cm p2p -- OUTSIDE the 0.4-0.8cm resting band this rung is gated on, i.e.
904// 2x too large, the SAME p2p-vs-amplitude conflation the recorder caught in WC_GAIT_BOB_Q8 (14
905// -> 7). At 1 q8: 2/256*100 = 0.78cm p2p, inside the band. Caught by doing the arithmetic in the
906// unit the CRITERION is written in, before it shipped visibly.
907// ⚠KNOWN LIMIT, to be measured not assumed: 1 q8 is near the world-q8 resolution floor, so the
908// anchor steps coarsely; the spring integrates and should low-pass it, but ?breath=1 reports the
909// actual excursion so this is decided by measurement rather than by my expectation.
910const WC_BREATH_Q8: i64 = 1
911// speed at which GAIT fully owns the anchor. PROVISIONAL and deliberately marked so: the units
912// of the per-tick mob delta were never measured, so this is the one number here without a
913// derivation. The mobspd door added below exists to REPLACE it with a measurement rather than
914// leave a guess sitting in the engine pretending to be a constant.
915const WC_BREATH_CUT_Q8: i64 = 24
916const WC_STEP_EASE_UP: i64 = 48 // mob Y climb rate Q8/tick (a 1-block rise ~ 5 ticks)
917const WC_NIGHT_X8: i64 = 5 // night begins at this eighth of the day (5/8)
918
919const EYE: i64 = 435 // eye height Q8 (~1.7 blocks)
920const SPEED: i64 = 40 // walk Q8 per tick
921// GAIT DRIVE CONSTANTS -- declared HERE, above their first reader in the mob tick. The compiler
922// refuses a module const used before its declaration because it would silently read 0, and for the
923// gait accumulator that would have meant a permanently frozen drive that still compiled, still ran,
924// and looked exactly like the metronome it was written to replace.
925const WC_PH_PER_TICK: i64 = 5 // the free-running advance MC_PH still uses for WANDER
926const WC_PH_ANG: i64 = 214 // angle-units per phase unit (the incumbent's drive scaling)
927const WC_NEED_GAIT: i64 = 3 // the needs row's spare slot, named now that it carries a value
928// ---- THE GAIT MODEL, CITED (knowledge/gamefeel_oracle.conf, gait_* rows) -----------------------
929// Every number below is a published normative measurement carrying its cohort and its instrument.
930// None is a taste, and none may be "tuned" without moving the conf row and its source with it.
931// ⚠UNIT DISCIPLINE, AND THIS FILE HAS ALREADY PAID ONCE FOR GETTING IT WRONG (WC_GAIT_BOB_Q8 went
932// 14 -> 7 on exactly this): the gait literature reports RANGE of motion -- rRoM, ROM -- which is
933// PEAK-TO-PEAK. The AMPLITUDE is HALF of it. Every constant here is stored as the PUBLISHED RANGE
934// in DECIDEGREES so it can be compared straight against the paper, and the halving happens in
935// exactly one function (wc_amp_ddeg) so no caller can forget it.
936const WC_DDEG_HALFTURN: i64 = 1800 // decidegrees in IT_PI (a half turn): the ddeg -> it-unit scale
937// STRIDE = 2 x step length 0.73 m (mean, 21-30 age band, markerless normative database).
938// 1 BLOCK = 1 m is NOT assumed here, it is read off the engine: EYE = 435 q8 = 1.70 blocks is the
939// player's eye height and adult eye height is ~1.6-1.7 m, so a block IS a metre to within the
940// figure's own tolerance. 1.46 m = 1.46 blocks = 374 q8.
941// ★THE PUBLISHED TRIPLE RECONCILES, WHICH IS A FREE AUDIT OF THE SOURCE: step 0.73 m x cadence
942// 108.40 steps/min / 60 = 1.319 m/s against that table's own reported gait speed of 1.30 m/s.
943const WC_STRIDE_Q8: i64 = 374
944// PELVIS transverse rotation, rRoM = 5.2 deg (n=201 healthy adults, 5 km/h, surface topography).
945// ⚠SCOPE, STATED: surface topography estimates the pelvis from PSIS surface markers and reads
946// LOWER than bone-pin and marker-cluster methods, which put pelvic transverse range nearer 10 deg.
947// 5.2 is therefore a FLOOR from one named instrument, not a settled value, and it is used as the
948// reference the genome varies AROUND rather than as a ceiling.
949const WC_PELVIS_ROT_DDEG: i64 = 52
950// THORACIC counter-rotation, rRoM at T7 = 14.6 deg -- and this is the paper's headline finding,
951// explicitly CONTRARY to the previous functional understanding that T7 is the near-static point of
952// intersection: T7/T8 carry the LARGEST rotary amplitude of every vertebra C7..L4, and "the largest
953// rotary opposition was also found between the pelvis and T7/T8". The thorax rotates roughly THREE
954// TIMES the pelvis, against it.
955// ★THIS PHASE RELATIONSHIP IS THE MECHANISM READ AS "SWINGING HIPS". It is not an amplitude: what
956// the eye sees is the pelvis and the shoulders twisting in OPPOSITION about the line of travel.
957// It is encoded as a SIGN below and therefore needs no constant of its own -- deliberately absent.
958const WC_THORAX_ROT_DDEG: i64 = 146
959// ELBOW flexion-extension ROM through the gait cycle = 29.7 deg (SD 10.2). The forearm is NOT
960// rigid in walking; a locked elbow is the "stiff arms" report stated as a measurement, and this
961// row is what makes it a defect rather than an opinion.
962const WC_ELBOW_ROM_DDEG: i64 = 297
963// TURN ALLOWANCE, expressed as heading change per STRIDE rather than per tick, so it is
964// speed-coupled BY CONSTRUCTION: a standing girl cannot turn and a walking one turns in
965// proportion to the ground she covers. ⚠DERIVED-BY-ARGUMENT, NOT MEASURED, AND LABELLED SO: a
966// walking body re-places its feet once per stride and cannot change heading by more than about a
967// quarter turn in that time. Cross-check against the two rulers this engine already owns -- at
968// the cited stride and a mob's 4 q8/tick it works out at 68 it-units/tick = 57 deg/s, a little
969// over half the player's own TURN slew of 140 it-units/tick = 117 deg/s, and inside the 60-90
970// deg/s that comfortable walking turns are usually quoted at. What would SETTLE it is a cited
971// walking turn-rate band in gamefeel_oracle.conf; there is not one, and inventing a row that
972// looked cited would be worse than naming the gap.
973const WC_TURN_PER_STRIDE: i64 = IT_PI/2
974const TURN: i64 = 140 // yaw it-units per tick (keyboard turn / legacy dir path)
975const PITCHV: i64 = 90 // pitch it-units per tick (R/F keyboard look)
976const PITCH_MAX: i64 = 5000
977const LOOKS: i64 = 6 // mouselook: it-units per accumulated look count
978const JUMPV: i64 = 66 // jump takeoff velocity Q8/tick
979const GRAV: i64 = 9 // gravity Q8/tick^2
980const VTERM: i64 = 120 // terminal fall velocity Q8/tick -- ONE ruler for the player AND every mob
981 // (GE12 mob_step_gait; was an inline 120 in apply2_impl)
982// FOOTSTRIKE/LANDING IMPULSE unit bridge -- ARITHMETIC of two existing conventions, not a tuning.
983// Mob positions are world-q8 (256/block) and the softbind anchor is fed pos/4 (the
984// sb_tick_mob_gene call in mob_tick), so ONE MODEL UNIT = 4 world-q8. sd_impulse's own contract
985// (nx_softdyn: "model-units/tick * 256") takes model-q8/tick velocity kicks. Therefore one
986// world-q8/tick of mob velocity = SD_Q8/4 solver velocity units, and a mob velocity change dv
987// converts as dv*WC_IMP_SCALE with no free parameter anywhere in the chain.
988const WC_IMP_SCALE: i64 = SD_Q8/4
989const MAXSTEPS: i64 = 110 // DDA cells per ray (view distance)
990const REACH_STEPS: i64 = 20 // crosshair edit reach in DDA cells
991
992func wst(base: i64) -> *i64 { return (base + O_ST) as *i64 }
993func wsp(base: i64) -> *i64 { return (base + O_SPEC) as *i64 }
994func wgp(base: i64) -> *i64 { return (base + O_GENP) as *i64 }
995func mobp(base: i64) -> *i64 { return (base + O_MOBS) as *i64 }
996func wfb(base: i64) -> *i64 { return (base + O_FB) as *i64 }
997func wvx(base: i64) -> *u8 { return (base + O_VOX) as *u8 }
998func winp(base: i64) -> *i64 { return (base + O_INPUT) as *i64 }
999func wpack(r: i64, g: i64, b: i64) -> i64 { return r | (g << 8) | (b << 16) }
1000func wclamp(v: i64, lo: i64, hi: i64) -> i64 { if v < lo { return lo } if v > hi { return hi } return v }
1001
1002func vin(x: i64, y: i64, z: i64) -> i64 {
1003 if x < 0 { return 0 } if x >= WX { return 0 }
1004 if y < 0 { return 0 } if y >= WY { return 0 }
1005 if z < 0 { return 0 } if z >= WZ { return 0 }
1006 return 1
1007}
1008func vget(base: i64, x: i64, y: i64, z: i64) -> i64 {
1009 if vin(x, y, z) == 0 { return 0 }
1010 let v: *u8 = wvx(base)
1011 return (v[(y*WZ + z)*WX + x] & 0xff) as i64
1012}
1013func vset(base: i64, x: i64, y: i64, z: i64, b: i64) -> i64 {
1014 if vin(x, y, z) == 0 { return 0 }
1015 let v: *u8 = wvx(base)
1016 v[(y*WZ + z)*WX + x] = b as u8
1017 return 1
1018}
1019
1020// ---------- edit journal (v6 streaming): every PLAYER edit recorded at ABSOLUTE world coords ----------
1021// One packed i64 hash slot per touched cell: (key+1)<<8 | block, key = ax+2^24 (25b) : az+2^24 (25b)
1022// : ay (6b). The journal is the persistent truth for touched land; the window is a cache over
1023// (seed + journal) -- the voxchunk law (virgin land from the seed, touched land from history) wired
1024// into the live game. Bounded EJRN_SLOTS edits; a FULL journal REFUSES the whole edit LOUDLY
1025// (S_EJDROP counts refusals) so world and history can never disagree.
1026func ejp(base: i64) -> *i64 { return (base + O_EJRN) as *i64 }
1027func ej_key(ax: i64, ay: i64, az: i64) -> i64 {
1028 return ((ax + WATER_MAGIC_16777216) << 31) | ((az + WATER_MAGIC_16777216) << 6) | ay
1029}
1030func ej_put(base: i64, ax: i64, ay: i64, az: i64, b: i64) -> i64 {
1031 let e: *i64 = ejp(base)
1032 let k: i64 = ej_key(ax, ay, az)
1033 let kv: i64 = ((k + 1) << 8) | (b & 255)
1034 var i: i64 = (k * EJRN_HASH_MUL) & (EJRN_SLOTS - 1)
1035 var n: i64 = 0
1036 while n < EJRN_SLOTS {
1037 let cur: i64 = e[i]
1038 if cur == 0 { e[i] = kv; return 1 }
1039 if (cur >> 8) == k + 1 { e[i] = kv; return 1 }
1040 i = (i + 1) & (EJRN_SLOTS - 1)
1041 n = n + 1
1042 }
1043 return 0 - 1
1044}
1045func ej_get(base: i64, ax: i64, ay: i64, az: i64) -> i64 {
1046 let e: *i64 = ejp(base)
1047 let k: i64 = ej_key(ax, ay, az)
1048 var i: i64 = (k * EJRN_HASH_MUL) & (EJRN_SLOTS - 1)
1049 var n: i64 = 0
1050 while n < EJRN_SLOTS {
1051 let cur: i64 = e[i]
1052 if cur == 0 { return 0 - 1 }
1053 if (cur >> 8) == k + 1 { return cur & 255 }
1054 i = (i + 1) & (EJRN_SLOTS - 1)
1055 n = n + 1
1056 }
1057 return 0 - 1
1058}
1059// overlay journal entries falling inside the local box [lx0..lx1) x [lz0..lz1) -- edits WIN over regen
1060func ej_overlay(base: i64, lx0: i64, lx1: i64, lz0: i64, lz1: i64) -> i64 {
1061 let s: *i64 = wst(base)
1062 let e: *i64 = ejp(base)
1063 var i: i64 = 0
1064 while i < EJRN_SLOTS {
1065 let cur: i64 = e[i]
1066 if cur != 0 {
1067 let k: i64 = (cur >> 8) - 1
1068 let ay: i64 = k & 63
1069 let az: i64 = ((k >> 6) & WATER_MAGIC_33554431) - WATER_MAGIC_16777216
1070 let ax: i64 = ((k >> 31) & WATER_MAGIC_33554431) - WATER_MAGIC_16777216
1071 let lx: i64 = ax - s[S_WOX]
1072 let lz: i64 = az - s[S_WOZ]
1073 if lx >= lx0 { if lx < lx1 { if lz >= lz0 { if lz < lz1 {
1074 vset(base, lx, ay, lz, cur & 255)
1075 } } } }
1076 }
1077 i = i + 1
1078 }
1079 return 0
1080}
1081// the PLAYER-EDIT write path: journal at absolute coords FIRST (a full journal refuses the whole
1082// edit -- world and history stay consistent), then the window write. Gen/save paths keep raw vset.
1083func wc_edit(base: i64, x: i64, y: i64, z: i64, b: i64) -> i64 {
1084 let s: *i64 = wst(base)
1085 if ej_put(base, x + s[S_WOX], y, z + s[S_WOZ], b) < 0 {
1086 s[S_EJDROP] = s[S_EJDROP] + 1
1087 return 0
1088 }
1089 return vset(base, x, y, z, b)
1090}
1091// solid for collision: everything but air, water and CROPS (plants are walked through, not on)
1092func vsolid(base: i64, x: i64, y: i64, z: i64) -> i64 {
1093 let b: i64 = vget(base, x, y, z)
1094 if b == 0 { return 0 }
1095 if b == 4 { return 0 }
1096 if b >= B_CROP0 { if b <= B_CROP2 { return 0 } }
1097 return 1
1098}
1099
1100// ---------- worldgen: integer value noise -> heightmap -> columns -> trees ----------
1101func whash(x: i64, z: i64, sd: i64) -> i64 {
1102 var n: i64 = x*TERRAIN_HASH_X + z*TERRAIN_HASH_Z + sd*TERRAIN_HASH_SEED
1103 n = n & SAVE_CK_MASK
1104 n = (n ^ (n >> 13)) * TERRAIN_HASH_MIX
1105 n = n & SAVE_CK_MASK
1106 return (n ^ (n >> 16)) % 256
1107}
1108// bilinear value noise, lattice spacing `sc`, result 0..255
1109func wnoise(x: i64, z: i64, sc: i64, sd: i64) -> i64 {
1110 let cx: i64 = x / sc
1111 let cz: i64 = z / sc
1112 let fx: i64 = x % sc
1113 let fz: i64 = z % sc
1114 let c00: i64 = whash(cx, cz, sd)
1115 let c10: i64 = whash(cx+1, cz, sd)
1116 let c01: i64 = whash(cx, cz+1, sd)
1117 let c11: i64 = whash(cx+1, cz+1, sd)
1118 let v0: i64 = c00 + (c10 - c00)*fx/sc
1119 let v1: i64 = c01 + (c11 - c01)*fx/sc
1120 return v0 + (v1 - v0)*fz/sc
1121}
1122// the RAW two-octave surface: what wheight was in full before E1, unchanged and still the only
1123// thing the talus measurement is allowed to read (a threshold derived from an already-eroded
1124// surface would be measuring its own output).
1125func wheight_raw(base: i64, x: i64, z: i64, sd: i64) -> i64 {
1126 let sp: *i64 = wsp(base)
1127 // GE14a: when the recipe binds the staged pipeline, the ground IS the six-field
1128 // parameter space (continentalness -> spline, ridged relief scaled by weirdness and
1129 // flattened by erosion) rather than this engine's two octaves of value noise. The
1130 // core statics are set PER CALL, not once at init, deliberately: gates hold several
1131 // arenas at different seeds at the same time and a module-global seeded once would
1132 // silently generate one arena's terrain inside another. Four assignments against a
1133 // per-column noise evaluation is not a cost worth a correctness risk.
1134 let wpd: i64 = sp[P_WPIPE]
1135 if wpd != 0 {
1136 WP_SEED = sd
1137 WP_TEMP_BIAS = 0
1138 WP_CONT_BIAS = 0
1139 WP_MOUNT_SCALE = WP_MAGIC_1400
1140 var wsc: i64 = sp[P_WPSCALE]
1141 if wsc <= 0 { wsc = 1 }
1142 return wclamp(sp[P_TBASE] + wp_height_raw(x*wsc, z*wsc)/wpd, 1, WY - 8)
1143 }
1144 let n1: i64 = wnoise(x, z, 16, sd)
1145 let n2: i64 = wnoise(x, z, 5, sd + 7)
1146 var h: i64 = sp[P_TBASE] + n1*sp[P_TAMP1]/256 + n2*sp[P_TAMP2]/256
1147 return wclamp(h, 1, WY - 8)
1148}
1149
1150// ---------- E1: TALUS EROSION, EVALUATED POINTWISE (2026-08-25) ----------
1151// THE WORLD SCROLLS, SO EROSION HERE CANNOT BE A BAKED GRID. gencol regenerates strips at
1152// ABSOLUTE coordinates as the window slides (s[S_WOX] = s[S_WOX] + dx), which is exactly why the
1153// header above gencol calls the terrain "a pure function of (absolute position, seed) -> unbounded
1154// land". nx_worldpipe's wp_erode is the baked-grid shape and its OWN docstring states the cost:
1155// it returns zero "outside the baked span", a case "a caller must not be able to tell apart from
1156// no erosion here, because that is what they are". Baking it here would put eroded ground behind
1157// the player and raw noise in front of him with a hard seam between the two. Storing a grid is
1158// not available either -- "wasm has no mmap; every buffer is an arena offset", and the
1159// framebuffer TAILS the arena (T60), so a 128x128 heightfield would have to move WASM_MEM_BYTES.
1160// SO THE OPERATOR IS EVALUATED, NOT STORED. k passes of a radius-1 stencil have a domain of
1161// dependence of radius k, so the unrolled composition below returns at (x,z) exactly what a
1162// k-pass relaxation over an INFINITE grid would put there. No seam can exist because there is no
1163// grid to have an edge, and nothing has to be saved, shifted or invalidated when the world slides.
1164// The pass is thermal (talus) erosion in its symmetric PAIRWISE-EXCHANGE form: across each of the
1165// 4 edges material moves from the higher cell to the lower one ONLY where the drop exceeds the
1166// talus threshold. wc_er_flux is ANTISYMMETRIC -- flux(-d) == -flux(d) exactly, truncation toward
1167// zero included -- so both ends of every edge move by equal and opposite amounts and the pass
1168// CONSERVES MASS. That is what makes this erosion and not a blur: a blur lowers everything, this
1169// cuts steep faces back and fills the hollows immediately below them, and it leaves ground gentler
1170// than the threshold untouched entirely.
1171const WC_ER_Q: i64 = 256 // fixed point the pass runs in. World heights are
1172 // small integers (craft relief ~22 blocks), so a
1173 // pass done in whole blocks could only ever move 0
1174 // or >=1 and would quantise the effect away.
1175const WC_ER_STABLE_Q: i64 = WC_ER_Q / 4 // DERIVED, not tasted: an explicit 4-neighbour
1176 // exchange h' = h + r*sum(h_n - h) is stable iff
1177 // 4r <= 1, so r = 1/4 is the marginal limit and
1178 // oscillates AT it.
1179const WC_ER_RATE_Q: i64 = WC_ER_STABLE_Q / 2 // WRITTEN AS THE ARITHMETIC: half the stability
1180 // limit. This factor of 2 is the ONLY judgement in
1181 // the whole operator and it is named right here;
1182 // the per-world lever is the tick budget, which is
1183 // recipe DATA, not code.
1184const WC_ER_MAXK: i64 = 3 // STRUCTURAL, not a clamp: three unrolled levels
1185 // are written below and no fourth one exists. Cost
1186 // is 5^k raw height evaluations per column -- 125
1187 // at k=3; 625 at k=4 would put worldgen past a
1188 // second and a visitor would meet a blank canvas.
1189const WC_ER_FLAT: i64 = 0 - 1 // P_ERTAL sentinel: measured, and there is no relief
1190
1191// THE SAME SURFACE AT SUB-BLOCK RESOLUTION -- AND THE FIX FOR A MEASURED, GATE-CAUGHT DEFECT.
1192// wheight_raw's two truncating divisions by 256 round the land to WHOLE BLOCKS before anything
1193// can weather it, and feeding that pre-rounded field to the pass made the first cut of this
1194// operator measurably do nothing. With the input quantised, every neighbour drop is a multiple of
1195// 256; the MEASURED talus came out at 264, so a one-block step (256) sits BELOW the threshold and
1196// does not move at all, and a two-block step moves (512-264)/8 = 31 of the 128 needed to change a
1197// block. The wasm-VM gate reported moved=0 of 576 with HI 477 -> 477 and REFUSED the ship. That is
1198// the tooth doing its job, and the answer is not a bigger rate -- it is to weather the CONTINUOUS
1199// field and quantise only the result, which is what erosion does to real ground anyway.
1200func wheight_q(base: i64, x: i64, z: i64, sd: i64) -> i64 {
1201 let sp: *i64 = wsp(base)
1202 let n1: i64 = wnoise(x, z, 16, sd)
1203 let n2: i64 = wnoise(x, z, 5, sd + 7)
1204 var hq: i64 = sp[P_TBASE]*WC_ER_Q + n1*sp[P_TAMP1] + n2*sp[P_TAMP2]
1205 return wclamp(hq, WC_ER_Q, (WY - 8)*WC_ER_Q)
1206}
1207// signed transfer INTO this cell across one edge, given the neighbour-minus-self drop d.
1208// Antisymmetric by construction, so the two ends of an edge always move by equal and opposite
1209// amounts. That identity is what conserves mass, and the gate ASSERTS it rather than assuming the
1210// dialect truncates the way this reasoning needs.
1211func wc_er_flux(d: i64, t: i64) -> i64 {
1212 if d > t { return (d - t)*WC_ER_RATE_Q/WC_ER_Q }
1213 if d < 0 - t { return (d + t)*WC_ER_RATE_Q/WC_ER_Q }
1214 return 0
1215}
1216// THE THRESHOLD IS MEASURED, NEVER AUTHORED. Mean over a FIXED reference patch of each cell's
1217// largest 4-neighbour drop -- wp_erode_talus_derived's rule, applied to the surface actually being
1218// eroded. The patch is the absolute [0,WX)x[0,WZ) square rather than the player's current window,
1219// so the threshold stays a pure function of (spec, seed) and does not drift as the world slides
1220// under him. Result is in WC_ER_Q units; a world with no relief measures 0 and turns erosion off.
1221func wc_er_talus(base: i64, sd: i64) -> i64 {
1222 var sum: i64 = 0
1223 var z: i64 = 0
1224 while z < WZ {
1225 var x: i64 = 0
1226 while x < WX {
1227 let h: i64 = wheight_q(base, x, z, sd)
1228 var m: i64 = 0
1229 let da: i64 = wheight_q(base, x - 1, z, sd) - h
1230 if da > m { m = da }
1231 if 0 - da > m { m = 0 - da }
1232 let db: i64 = wheight_q(base, x + 1, z, sd) - h
1233 if db > m { m = db }
1234 if 0 - db > m { m = 0 - db }
1235 let dc: i64 = wheight_q(base, x, z - 1, sd) - h
1236 if dc > m { m = dc }
1237 if 0 - dc > m { m = 0 - dc }
1238 let dd: i64 = wheight_q(base, x, z + 1, sd) - h
1239 if dd > m { m = dd }
1240 if 0 - dd > m { m = 0 - dd }
1241 sum = sum + m
1242 x = x + 1
1243 }
1244 z = z + 1
1245 }
1246 return sum/(WX*WZ) // already in WC_ER_Q units: the field it measured is
1247}
1248// memoised into the spec so the sweep above runs ONCE per arena, never once per column. The
1249// sentinel makes "measured and flat" distinguishable from "not measured yet", which is the whole
1250// reason a flat world does not pay the sweep on every single query.
1251func wc_er_arm(base: i64, sd: i64) -> i64 {
1252 let sp: *i64 = wsp(base)
1253 if sp[P_ERTAL] != 0 { return sp[P_ERTAL] }
1254 let t: i64 = wc_er_talus(base, sd)
1255 if t <= 0 { sp[P_ERTAL] = WC_ER_FLAT } else { sp[P_ERTAL] = t }
1256 return sp[P_ERTAL]
1257}
1258// ONE PASS, UNROLLED THREE DEEP. No recursion anywhere: each level is its own function and calls
1259// only the level below it, so the maximum budget is a property of the SOURCE that a reader can
1260// count, rather than a runtime clamp that has to be trusted.
1261func wc_er1(base: i64, x: i64, z: i64, sd: i64, t: i64) -> i64 {
1262 let h: i64 = wheight_q(base, x, z, sd)
1263 var a: i64 = h
1264 a = a + wc_er_flux(wheight_q(base, x - 1, z, sd) - h, t)
1265 a = a + wc_er_flux(wheight_q(base, x + 1, z, sd) - h, t)
1266 a = a + wc_er_flux(wheight_q(base, x, z - 1, sd) - h, t)
1267 a = a + wc_er_flux(wheight_q(base, x, z + 1, sd) - h, t)
1268 return a
1269}
1270func wc_er2(base: i64, x: i64, z: i64, sd: i64, t: i64) -> i64 {
1271 let h: i64 = wc_er1(base, x, z, sd, t)
1272 var a: i64 = h
1273 a = a + wc_er_flux(wc_er1(base, x - 1, z, sd, t) - h, t)
1274 a = a + wc_er_flux(wc_er1(base, x + 1, z, sd, t) - h, t)
1275 a = a + wc_er_flux(wc_er1(base, x, z - 1, sd, t) - h, t)
1276 a = a + wc_er_flux(wc_er1(base, x, z + 1, sd, t) - h, t)
1277 return a
1278}
1279func wc_er3(base: i64, x: i64, z: i64, sd: i64, t: i64) -> i64 {
1280 let h: i64 = wc_er2(base, x, z, sd, t)
1281 var a: i64 = h
1282 a = a + wc_er_flux(wc_er2(base, x - 1, z, sd, t) - h, t)
1283 a = a + wc_er_flux(wc_er2(base, x + 1, z, sd, t) - h, t)
1284 a = a + wc_er_flux(wc_er2(base, x, z - 1, sd, t) - h, t)
1285 a = a + wc_er_flux(wc_er2(base, x, z + 1, sd, t) - h, t)
1286 return a
1287}
1288// THE HEIGHT THE PLAYER WALKS ON. gencol builds every column from this and gentrees plants from
1289// it, so a change here is a change to the GROUND, not a shader drawn over it. All 7 call sites are
1290// worldgen or init; the renderer reads voxels, so the 5^k cost is paid once per strip and never
1291// per frame.
1292func wheight(base: i64, x: i64, z: i64, sd: i64) -> i64 {
1293 let sp: *i64 = wsp(base)
1294 var k: i64 = sp[P_ERODE]
1295 if k <= 0 { return wheight_raw(base, x, z, sd) }
1296 if k > WC_ER_MAXK { k = WC_ER_MAXK }
1297 let t: i64 = wc_er_arm(base, sd)
1298 if t <= 0 { return wheight_raw(base, x, z, sd) }
1299 var he: i64 = 0
1300 if k == 1 { he = wc_er1(base, x, z, sd, t) }
1301 if k == 2 { he = wc_er2(base, x, z, sd, t) }
1302 if k >= 3 { he = wc_er3(base, x, z, sd, t) }
1303 return wclamp((he + WC_ER_Q/2)/WC_ER_Q, 1, WY - 8)
1304}
1305// GE53: the SAME eroded height wheight returns, in WC_ER_Q units and NOT rounded -- the one value the
1306// surface source keeps that the voxel column throws away at wheight's last line.
1307func wheight_qe(base: i64, x: i64, z: i64, sd: i64) -> i64 {
1308 let sp: *i64 = wsp(base)
1309 var k: i64 = sp[P_ERODE]
1310 if k <= 0 { return wheight_q(base, x, z, sd) }
1311 if k > WC_ER_MAXK { k = WC_ER_MAXK }
1312 let t: i64 = wc_er_arm(base, sd)
1313 if t <= 0 { return wheight_q(base, x, z, sd) }
1314 var he: i64 = 0
1315 if k == 1 { he = wc_er1(base, x, z, sd, t) }
1316 if k == 2 { he = wc_er2(base, x, z, sd, t) }
1317 if k >= 3 { he = wc_er3(base, x, z, sd, t) }
1318 return wclamp(he, WC_ER_Q, (WY - 8)*WC_ER_Q)
1319}
1320// the ocean ramp in Q units -- the same arithmetic wsp_beach_ocean applies to whole blocks, so the field
1321// and the column agree on where the beach meets the sea.
1322func wsp_beach_ocean_q(sp: *i64, ax: i64, az: i64, hq: i64) -> i64 {
1323 let oc: i64 = sp[P_OCEAN]
1324 if oc == 0 { return hq }
1325 let d: i64 = wsp_ocean_d(sp, ax, az)
1326 if d <= 0 { return hq }
1327 let slopew: i64 = (oc >> 12) & 63
1328 let bedq: i64 = ((oc >> 18) & 63)*WC_ER_Q
1329 var t: i64 = bedq
1330 if d < slopew { t = hq - (hq - bedq)*d/slopew }
1331 if t < bedq { t = bedq }
1332 if t > hq { t = hq }
1333 return t
1334}
1335func hq_get(base: i64, x: i64, z: i64) -> i64 {
1336 if x < 0 { return 0 - 1 }
1337 if z < 0 { return 0 - 1 }
1338 if x >= WX { return 0 - 1 }
1339 if z >= WZ { return 0 - 1 }
1340 let p: *i64 = (base + O_HQ + (z*WX + x)*8) as *i64
1341 return p[0]
1342}
1343func hq_set(base: i64, x: i64, z: i64, v: i64) -> i64 {
1344 let p: *i64 = (base + O_HQ + (z*WX + x)*8) as *i64
1345 p[0] = v
1346 return 0
1347}
1348func hq_off() -> i64 { return O_HQ }
1349// wc_surface_source -- GE53's named symbol: the terrain SURFACE height (the top of the ground, Q8 world
1350// units) at a Q8 position, bilinear between the four surrounding columns. -1 outside the window. A
1351// column's Q height is the base of its top block, so the surface sits one block above it.
1352func wc_surface_source(base: i64, pxq: i64, pzq: i64) -> i64 {
1353 let cx: i64 = pxq >> 8
1354 let cz: i64 = pzq >> 8
1355 let fx: i64 = pxq & 255
1356 let fz: i64 = pzq & 255
1357 let h00: i64 = hq_get(base, cx, cz)
1358 let h10: i64 = hq_get(base, cx + 1, cz)
1359 let h01: i64 = hq_get(base, cx, cz + 1)
1360 let h11: i64 = hq_get(base, cx + 1, cz + 1)
1361 if h00 < 0 { return 0 - 1 }
1362 if h10 < 0 { return 0 - 1 }
1363 if h01 < 0 { return 0 - 1 }
1364 if h11 < 0 { return 0 - 1 }
1365 let top: i64 = h00*(256 - fx)*(256 - fz) + h10*fx*(256 - fz) + h01*(256 - fx)*fz + h11*fx*fz
1366 return top/65536 + 256
1367}
1368// terrain-class blocks: the ground the field replaces. Structures (wood, leaves, crops, water) stay cells.
1369func wterrain(b: i64) -> i64 {
1370 if b == 1 { return 1 }
1371 if b == 2 { return 1 }
1372 if b == 3 { return 1 }
1373 if b == 5 { return 1 }
1374 if b == 8 { return 1 }
1375 if b == 9 { return 1 }
1376 if b == 10 { return 1 }
1377 if b == 11 { return 1 }
1378 return 0
1379}
1380// trilinear 3D value noise 0..255 (cave carver)
1381func wnoise3(x: i64, y: i64, z: i64, sc: i64, sd: i64) -> i64 {
1382 let cx: i64 = x / sc
1383 let cy3: i64 = y / sc
1384 let cz: i64 = z / sc
1385 let fx: i64 = x % sc
1386 let fy: i64 = y % sc
1387 let fz: i64 = z % sc
1388 let a00: i64 = whash(cx + cy3*97, cz, sd)
1389 let a10: i64 = whash(cx + 1 + cy3*97, cz, sd)
1390 let a01: i64 = whash(cx + cy3*97, cz + 1, sd)
1391 let a11: i64 = whash(cx + 1 + cy3*97, cz + 1, sd)
1392 let b00: i64 = whash(cx + (cy3+1)*97, cz, sd)
1393 let b10: i64 = whash(cx + 1 + (cy3+1)*97, cz, sd)
1394 let b01: i64 = whash(cx + (cy3+1)*97, cz + 1, sd)
1395 let b11: i64 = whash(cx + 1 + (cy3+1)*97, cz + 1, sd)
1396 let a0: i64 = a00 + (a10 - a00)*fx/sc
1397 let a1: i64 = a01 + (a11 - a01)*fx/sc
1398 let av: i64 = a0 + (a1 - a0)*fz/sc
1399 let b0: i64 = b00 + (b10 - b00)*fx/sc
1400 let b1: i64 = b01 + (b11 - b01)*fx/sc
1401 let bv: i64 = b0 + (b1 - b0)*fz/sc
1402 return av + (bv - av)*fy/sc
1403}
1404// recompute the world's highest solid layer (init + save-load; place maintains it incrementally)
1405func wc_wmax(base: i64) -> i64 {
1406 let s: *i64 = wst(base)
1407 let vxp: *u8 = (base + O_VOX) as *u8
1408 var y: i64 = WY - 1
1409 while y >= 0 {
1410 var i: i64 = y*WZ*WX
1411 let end: i64 = (y + 1)*WZ*WX
1412 while i < end {
1413 if (vxp[i] & 0xff) != 0 { s[S_WMAX] = y; return y }
1414 i = i + 1
1415 }
1416 y = y - 1
1417 }
1418 s[S_WMAX] = 0
1419 return 0
1420}
1421
1422// generate ONE local column from ABSOLUTE world coords: the terrain is a pure function of
1423// (absolute position, seed) -> unbounded land, deterministic everywhere, no stored world needed
1424// for virgin ground (the voxchunk regen law wired into the live game).
1425// GE13 -- shore distance: how many blocks SEAWARD of the shoreline (ax,az) sits; <= 0 = inland,
1426// -1 = this identity has no ocean row at all.
1427func wsp_ocean_d(sp: *i64, ax: i64, az: i64) -> i64 {
1428 let oc: i64 = sp[P_OCEAN]
1429 if oc == 0 { return 0 - 1 }
1430 let edge: i64 = oc & 3
1431 let shore: i64 = ((oc >> 2) & 1023) - 512
1432 if edge == 0 { return az - shore }
1433 if edge == 1 { return shore - az }
1434 if edge == 2 { return ax - shore }
1435 return shore - ax
1436}
1437// GE45 REVIEW FRAMING (2026-09-04) -- the sea bearing of an identity, in yaw it-units (yaw 0 looks toward +z,
1438// x = sin, z = cos: the convention summon() and the page's review steering already share), or -1 when the
1439// identity carries no ocean row. Read by the spawn (the first frame faces the sea), by summon() (the review
1440// ring stands on the seaward arc so the shore is behind the girl the camera frames) and exported as the
1441// sea_yaw door for the HUD and the gate. Data: the same P_OCEAN row wsp_ocean_d decodes -- no second coastline.
1442func wsp_sea_yaw(sp: *i64) -> i64 {
1443 let oc: i64 = sp[P_OCEAN]
1444 if oc == 0 { return 0 - 1 }
1445 let edge: i64 = oc & 3
1446 if edge == 0 { return 0 }
1447 if edge == 1 { return IT_PI }
1448 if edge == 2 { return IT_PI/2 }
1449 return IT_PI*3/2
1450}
1451// the seaward review arc: the summoned cast spans one quarter turn centred on the sea bearing. A quarter turn
1452// is the widest arc whose every member still stands between the player and the shore (tan 45 degrees = 1, so
1453// the gate can assert it with integer arithmetic: |dx| <= dz for a +z sea).
1454const WC_REVIEW_ARC: i64 = IT_PI/2
1455// GE13 -- the ocean shaping rule (gameengine rung wsp_beach_ocean), applied to the PURE noise
1456// height wherever a column sits seaward of the shoreline: ramp the ground from its natural
1457// height down to the SEABED across the SLOPE width, then hold the seabed. gencol's existing
1458// flood rule (P_WATER) then fills the water and its sand rule paints the wet band -- beach,
1459// shallows and open sea all emerge from ONE data row, no per-world code. P_OCEAN == 0 returns
1460// h untouched, so every existing world is byte-identical by construction.
1461func wsp_beach_ocean(sp: *i64, ax: i64, az: i64, h: i64) -> i64 {
1462 let oc: i64 = sp[P_OCEAN]
1463 if oc == 0 { return h }
1464 let d: i64 = wsp_ocean_d(sp, ax, az)
1465 if d <= 0 { return h }
1466 let slopew: i64 = (oc >> 12) & 63
1467 let bed: i64 = (oc >> 18) & 63
1468 var t: i64 = bed
1469 if d < slopew { t = h - (h - bed)*d/slopew }
1470 if t < bed { t = bed }
1471 if t > h { t = h }
1472 return t
1473}
1474
1475func gencol(base: i64, x: i64, z: i64, ax: i64, az: i64, sd: i64) -> i64 {
1476 let sp: *i64 = wsp(base)
1477 let wl: i64 = sp[P_WATER]
1478 let h: i64 = wsp_beach_ocean(sp, ax, az, wheight(base, ax, az, sd)) // GE13: the ocean is data
1479 if sp[P_SURF] == 1 { hq_set(base, x, z, wsp_beach_ocean_q(sp, ax, az, wheight_qe(base, ax, az, sd))) } // GE53: the surface source, kept at Q8
1480 var y: i64 = 0
1481 while y < WY {
1482 var b: i64 = 0
1483 if y <= h {
1484 b = 3 // stone
1485 if y > h - 3 { b = 2 } // dirt cap
1486 if y == h {
1487 b = 1 // grass
1488 if h <= wl { b = 5 } // sand at/below waterline
1489 if h >= sp[P_SNOW] { b = 8 } // snow high up
1490 }
1491 // caves: carve inside the crust (never the floor, never the top 2 = no surface holes,
1492 // and never under water columns so lakes stay sealed)
1493 if b == 3 { if y >= 2 { if y <= h - 2 { if h > wl {
1494 if wnoise3(ax, y, az, 7, sd + 55) > sp[P_CAVETH] { b = 0 }
1495 } } } }
1496 // ores seed the remaining stone: coal common, iron deeper, gold deepest
1497 if b == 3 {
1498 let orr: i64 = whash(ax*7 + y*131, az*11 + y*17, sd + 31) % 997
1499 if orr < 22 { b = 9 }
1500 if y < 14 { if orr >= 22 { if orr < 32 { b = 10 } } }
1501 if y < 9 { if orr >= 32 { if orr < 38 { b = 11 } } }
1502 }
1503 }
1504 if y > h { if y <= wl { b = 4 } } // flood low ground
1505 vset(base, x, y, z, b)
1506 y = y + 1
1507 }
1508 return 0
1509}
1510// paint a voxel ONLY inside the regen box -- a tree may never overwrite terrain (and its journal
1511// overlay) outside the strip being regenerated
1512func vset_box(base: i64, x: i64, y: i64, z: i64, b: i64, lx0: i64, lx1: i64, lz0: i64, lz1: i64) -> i64 {
1513 if x < lx0 { return 0 }
1514 if x >= lx1 { return 0 }
1515 if z < lz0 { return 0 }
1516 if z >= lz1 { return 0 }
1517 return vset(base, x, y, z, b)
1518}
1519// GE17 wsp_palm_shape -- THE PALM (W2 shape id 3, mirroring nx_treegen species 3: dep0=0 trunk-
1520// only + "a ring of LONG radial frond blobs from the trunk top" -- ONE species canon, two lanes,
1521// the PG36 rule). A bare, gently curved trunk with NO branches below the crown, then a frond
1522// rosette. Everything DERIVED, nothing tuned:
1523// LEAN -- phototropic, TOWARD OPEN WATER when the world declares an ocean (P_OCEAN edge
1524// bits: shoreline palms lean seaward for light), hash-picked axis otherwise. Tip
1525// displacement = th9/3 (tan ~18deg of trunk height, the shoreline coconut habit); profile
1526// quadratic in height (uniform curvature): lean(dy) = dy*dy/(3*th9), which lands the tip at
1527// exactly th9/3 with no constant of its own.
1528// FRONDS -- 8 directions (4 axial + 4 diagonal, the voxel ring), length = the genome's own
1529// canopy radius cr9, arch droop(r) = r*r/(2*cr9): the tip ends half the frond length below
1530// the crown, the same quadratic droop nx_treegen's palm crown uses (seg*seg*11 there).
1531// Painting is clipped to the regen box (vset_box) so it is seam-safe under the widened scan
1532// margin gentrees derives for shape 3. Trunk = wood (6), fronds + apical bud = leaves (7);
1533// on the shore identity those palette rows read driftwood-brown and scrub-green already.
1534func wsp_palm_shape(base: i64, sp: *i64, tx: i64, tz: i64, h2: i64, th9: i64, cr9: i64,
1535 ax: i64, az: i64, sd: i64, lx0: i64, lx1: i64, lz0: i64, lz1: i64) -> i64 {
1536 var pldx: i64 = 0
1537 var pldz: i64 = 0
1538 let poc9: i64 = sp[P_OCEAN]
1539 if poc9 != 0 {
1540 let pe9: i64 = poc9 & 3
1541 if pe9 == 0 { pldz = 1 }
1542 if pe9 == 1 { pldz = 0 - 1 }
1543 if pe9 == 2 { pldx = 1 }
1544 if pe9 == 3 { pldx = 0 - 1 }
1545 }
1546 if poc9 == 0 {
1547 let pd9: i64 = whash(ax*19 + 13, az*23 + 29, sd + 251) % 4
1548 if pd9 == 0 { pldx = 1 }
1549 if pd9 == 1 { pldx = 0 - 1 }
1550 if pd9 == 2 { pldz = 1 }
1551 if pd9 == 3 { pldz = 0 - 1 }
1552 }
1553 var pox: i64 = 0
1554 var poz: i64 = 0
1555 var pty: i64 = 1
1556 while pty <= th9 {
1557 let pl9: i64 = pty*pty/(3*th9)
1558 pox = pldx*pl9
1559 poz = pldz*pl9
1560 vset_box(base, tx + pox, h2 + pty, tz + poz, 6, lx0, lx1, lz0, lz1)
1561 pty = pty + 1
1562 }
1563 let pcx: i64 = tx + pox
1564 let pcz: i64 = tz + poz
1565 let ptop: i64 = h2 + th9
1566 vset_box(base, pcx, ptop + 1, pcz, 7, lx0, lx1, lz0, lz1)
1567 var pfd: i64 = 0
1568 while pfd < 8 {
1569 var fdx9: i64 = 0
1570 var fdz9: i64 = 0
1571 if pfd == 0 { fdx9 = 1 }
1572 if pfd == 1 { fdx9 = 0 - 1 }
1573 if pfd == 2 { fdz9 = 1 }
1574 if pfd == 3 { fdz9 = 0 - 1 }
1575 if pfd == 4 { fdx9 = 1; fdz9 = 1 }
1576 if pfd == 5 { fdx9 = 1; fdz9 = 0 - 1 }
1577 if pfd == 6 { fdx9 = 0 - 1; fdz9 = 1 }
1578 if pfd == 7 { fdx9 = 0 - 1; fdz9 = 0 - 1 }
1579 var pr9: i64 = 1
1580 while pr9 <= cr9 {
1581 vset_box(base, pcx + fdx9*pr9, ptop + 1 - pr9*pr9/(2*cr9), pcz + fdz9*pr9, 7, lx0, lx1, lz0, lz1)
1582 pr9 = pr9 + 1
1583 }
1584 pfd = pfd + 1
1585 }
1586 return 0
1587}
1588// trees whose TRUNK falls in the +-2-expanded ABSOLUTE range paint their blocks CLIPPED to the
1589// local box, so a tree crossing a strip seam is completed by whichever strip regenerates later.
1590// The trunk condition is PURE (grass by the gen rules: above water, below snow) -- no window peeking.
1591func gentrees(base: i64, lx0: i64, lx1: i64, lz0: i64, lz1: i64, sd: i64) -> i64 {
1592 let sp: *i64 = wsp(base)
1593 if sp[P_TREE] == 0 { return 0 }
1594 let s: *i64 = wst(base)
1595 let wl: i64 = sp[P_WATER]
1596 // scan expanded to +-4 (was +-2): a SPECIES canopy reaches up to radius 4, so a trunk that
1597 // far outside the box can paint inside it -- the strip-seam completion law, wider. Legacy
1598 // worlds are unchanged: an R=2 stamp 3-4 cells out paints nothing in-box (no-op scan rows).
1599 // GE17: a palm's phototropic lean displaces its crown by up to (tb+tv)/3 beyond the frond
1600 // radius, so a palm-genome world widens the seam scan by that maximum lean -- DERIVED from
1601 // the same genome rows the grower reads, not a second constant. Every other shape keeps
1602 // the historic +-4 margin bit-exactly, and the extra scan rows are no-ops by the vset_box
1603 // clip (the standing seam law, same argument as the +-2 -> +-4 widening above).
1604 var mg9: i64 = 4
1605 if ((sp[P_TREESPEC] >> 12) & 7) == 3 { mg9 = 4 + ((sp[P_TREESPEC] & 15) + ((sp[P_TREESPEC] >> 4) & 15))/3 }
1606 var az: i64 = s[S_WOZ] + lz0 - mg9
1607 while az <= s[S_WOZ] + lz1 + mg9 - 1 {
1608 var ax: i64 = s[S_WOX] + lx0 - mg9
1609 while ax <= s[S_WOX] + lx1 + mg9 - 1 {
1610 let hr9: i64 = wheight(base, ax, az, sd)
1611 let h2: i64 = wsp_beach_ocean(sp, ax, az, hr9) // GE13: no trees grow on the sea
1612 // GE17: DRY LAND is where the ocean rule was a NO-OP (h2 == hr9). Seaward of the
1613 // shoreline the ramp lowered this column -- that whole band is the beach slope and
1614 // its wet sand, and vegetation stays off it (palms out of the water, off the wet
1615 // band, by the ocean row's own geometry rather than a second coastline rule).
1616 // Worlds without an ocean row have h2 == hr9 everywhere BY CONSTRUCTION
1617 // (wsp_beach_ocean returns h untouched), so this conjunct changes nothing there.
1618 var trunk: i64 = 0
1619 // the tree altitude ceiling is a SPEC ROW, not an engine constant: hardcoded 19
1620 // silently capped forests for any identity whose land sits higher (gate T52 found
1621 // it -- vale's P_TREE 43->19 barely moved the trunk count because the CEILING, not
1622 // the density row, was binding). 0 = the historic 19, so craft/depths are unchanged.
1623 var tmax: i64 = sp[P_TREEMAX]
1624 if tmax <= 0 { tmax = 19 }
1625 if h2 < tmax { if h2 > wl { if h2 < sp[P_SNOW] { if h2 == hr9 {
1626 if whash(ax*3 + 7, az*5 + 11, sd + 99) % sp[P_TREE] == 0 { trunk = 1 }
1627 } } } }
1628 if trunk == 1 {
1629 let tx: i64 = ax - s[S_WOX]
1630 let tz: i64 = az - s[S_WOZ]
1631 let ts9: i64 = sp[P_TREESPEC]
1632 // W2b: the TREE branch keys on the tree bits (0..17) alone -- a genome carrying
1633 // only understory bits (18+) keeps the LEGACY forest exactly (T57's wood-equality
1634 // tooth), and understory grows in its own pass below regardless of trunk sites.
1635 if (ts9 & 262143) == 0 {
1636 // legacy stamp, byte-for-byte: every identity-only world is unchanged
1637 var ty: i64 = h2 + 1
1638 while ty <= h2 + 4 { vset_box(base, tx, ty, tz, 6, lx0, lx1, lz0, lz1); ty = ty + 1 }
1639 var lz: i64 = tz - 2
1640 while lz <= tz + 2 {
1641 var lx: i64 = tx - 2
1642 while lx <= tx + 2 {
1643 var keep: i64 = 1
1644 if lx == tx { if lz == tz { keep = 0 } }
1645 if keep == 1 {
1646 vset_box(base, lx, h2 + 4, lz, 7, lx0, lx1, lz0, lz1)
1647 if lx >= tx - 1 { if lx <= tx + 1 { if lz >= tz - 1 { if lz <= tz + 1 {
1648 vset_box(base, lx, h2 + 5, lz, 7, lx0, lx1, lz0, lz1)
1649 } } } }
1650 }
1651 lx = lx + 1
1652 }
1653 lz = lz + 1
1654 }
1655 vset_box(base, tx, h2 + 6, tz, 7, lx0, lx1, lz0, lz1)
1656 } else {
1657 // W2 SPECIES GROWER: the individual varies inside the species envelope by
1658 // position hash -- deterministic, seam-safe (paint clipped to the box),
1659 // asset-free. Shapes: 1 dome (squashed integer ellipsoid), 2 pine (diamond
1660 // rings widening down from the tip). Density drops leaves by hash for airy
1661 // canopies. All bounds y-clamped by vset's own vin guard.
1662 let tb9: i64 = ts9 & 15
1663 let tv9: i64 = (ts9 >> 4) & 15
1664 var cr9: i64 = (ts9 >> 8) & 15
1665 if cr9 < 1 { cr9 = 1 }
1666 if cr9 > 4 { cr9 = 4 }
1667 let sh9: i64 = (ts9 >> 12) & 7
1668 let dn9: i64 = (ts9 >> 15) & 7
1669 let hv9: i64 = whash(ax*13 + 5, az*17 + 3, sd + 141)
1670 var th9: i64 = tb9 + hv9 % (tv9 + 1)
1671 if th9 < 2 { th9 = 2 }
1672 if sh9 == 3 {
1673 // GE17: shape 3 = PALM, the frond-rosette grower (wsp_palm_shape).
1674 // dn9 (leaf drop) is deliberately unused there: fronds are already
1675 // sparse lines, not a volume to thin.
1676 wsp_palm_shape(base, sp, tx, tz, h2, th9, cr9, ax, az, sd, lx0, lx1, lz0, lz1)
1677 } else {
1678 var ty2: i64 = h2 + 1
1679 while ty2 <= h2 + th9 { vset_box(base, tx, ty2, tz, 6, lx0, lx1, lz0, lz1); ty2 = ty2 + 1 }
1680 let top9: i64 = h2 + th9
1681 var dy9: i64 = 0 - cr9
1682 while dy9 <= cr9 + 1 {
1683 var dz9: i64 = 0 - cr9
1684 while dz9 <= cr9 {
1685 var dx9: i64 = 0 - cr9
1686 while dx9 <= cr9 {
1687 var put9: i64 = 0
1688 if sh9 == 2 {
1689 if dy9 <= 1 {
1690 var pr9: i64 = 1 - dy9
1691 if pr9 > cr9 { pr9 = cr9 }
1692 var ad9: i64 = dx9
1693 if ad9 < 0 { ad9 = 0 - ad9 }
1694 var az9: i64 = dz9
1695 if az9 < 0 { az9 = 0 - az9 }
1696 if ad9 + az9 <= pr9 { put9 = 1 }
1697 }
1698 } else {
1699 if dx9*dx9 + dz9*dz9 + dy9*dy9*2 <= cr9*cr9 { put9 = 1 }
1700 }
1701 if put9 == 1 { if dn9 > 0 {
1702 if whash(ax*29 + dx9*3 + dy9*7, az*31 + dz9*5, sd + 177) % 8 < dn9 { put9 = 0 }
1703 } }
1704 if put9 == 1 {
1705 var istrunk9: i64 = 0
1706 if dx9 == 0 { if dz9 == 0 { if dy9 < 0 { istrunk9 = 1 } } }
1707 if istrunk9 == 0 { vset_box(base, tx + dx9, top9 + dy9, tz + dz9, 7, lx0, lx1, lz0, lz1) }
1708 }
1709 dx9 = dx9 + 1
1710 }
1711 dz9 = dz9 + 1
1712 }
1713 dy9 = dy9 + 1
1714 }
1715 }
1716 }
1717 }
1718 // W2b UNDERSTORY (genome bits 18-20 density, 21-22 kind 0=tufts 1=shrubs 2=mixed):
1719 // ground vegetation per column, seeded independently of trunks, same grass belt,
1720 // trunk columns excluded; shrub = plus-clump radius 1 (inside the +-4 seam scan).
1721 let ud9: i64 = (sp[P_TREESPEC] >> 18) & 7
1722 if ud9 > 0 { if trunk == 0 { if h2 > wl { if h2 < sp[P_SNOW] { if h2 == hr9 {
1723 if whash(ax*41 + 3, az*43 + 9, sd + 203) % 8 < ud9 {
1724 let uk9: i64 = (sp[P_TREESPEC] >> 21) & 3
1725 let ux5: i64 = ax - s[S_WOX]
1726 let uz5: i64 = az - s[S_WOZ]
1727 var shrub9: i64 = 0
1728 if uk9 == 1 { shrub9 = 1 }
1729 if uk9 == 2 { if whash(ax*7 + 1, az*11 + 5, sd + 209) % 2 == 0 { shrub9 = 1 } }
1730 vset_box(base, ux5, h2 + 1, uz5, 7, lx0, lx1, lz0, lz1)
1731 if shrub9 == 1 {
1732 // vegetation FILLS AIR, never replaces solids: a clump reaching into a
1733 // neighbor column must not eat its trunk or its surface (T57 measured the
1734 // unguarded version eating 792 wood blocks). Deterministic under the fixed
1735 // scan order -- a later trunk overwrites a leaf, so wood wins either way.
1736 if vget(base, ux5 + 1, h2 + 1, uz5) == 0 { vset_box(base, ux5 + 1, h2 + 1, uz5, 7, lx0, lx1, lz0, lz1) }
1737 if vget(base, ux5 - 1, h2 + 1, uz5) == 0 { vset_box(base, ux5 - 1, h2 + 1, uz5, 7, lx0, lx1, lz0, lz1) }
1738 if vget(base, ux5, h2 + 1, uz5 + 1) == 0 { vset_box(base, ux5, h2 + 1, uz5 + 1, 7, lx0, lx1, lz0, lz1) }
1739 if vget(base, ux5, h2 + 1, uz5 - 1) == 0 { vset_box(base, ux5, h2 + 1, uz5 - 1, 7, lx0, lx1, lz0, lz1) }
1740 if vget(base, ux5, h2 + 2, uz5) == 0 { vset_box(base, ux5, h2 + 2, uz5, 7, lx0, lx1, lz0, lz1) }
1741 }
1742 }
1743 } } } } }
1744 ax = ax + 1
1745 }
1746 az = az + 1
1747 }
1748 return 0
1749}
1750
1751// ---------- W3 SETTLEMENTS (GR6, the Infinigen-Indoors expansion, 2026-08-17) ----------
1752// Room LAYOUTS are solved OFFLINE by nx_indoorgen -- declarative constraints through the estate's
1753// part-placement solver, quantized, accept-rule-checked, REFUSED when unsatisfiable -- and land
1754// here as the imported data table (nx_indoorgen_data.nx). The engine only STAMPS: sites ride a
1755// coarse grid of BLDG_SITE-block cells hashed on ABSOLUTE coords (window-independent, so a
1756// building regenerates identically when the streaming window slides back -- the tree seam law at
1757// building scale); jitter, rotation and layout variant come from the same hash; and a building
1758// always fits INSIDE its own site cell (jitter 8 + max half-footprint 5 < SITE/2 = 20), so two
1759// sites can never collide. Terrain must be near-flat (4 rotated corners within 1 of the anchor
1760// height), dry and below the snowline, or the site deterministically stays empty. Painting is
1761// CLIPPED to the regen box (vset_box), and ej_overlay runs after every strip regen -- players can
1762// remodel a building and their edits win, exactly as they do against trees.
1763const BLDG_SITE: i64 = 40 // site-cell stride, blocks
1764const IG_SCAN0: i64 = 10 // W3 solve: first candidate anchor offset inside the site cell
1765const IG_SCANSTEP: i64 = 10 // candidate grid step: 3x3 covers offsets 10/20/30; footprint
1766 // half-extent (bw/2+1 <= 4) keeps every candidate's shell inside
1767 // its own cell, so neighbor cells can never overlap -- the
1768 // no-overlap rule holds by construction, not by test
1769const IG_MAXSLOPE: i64 = 2 // pre-declared accept rule: corners may deviate <=2 blocks from
1770 // the anchor; the IG_FOUND skirt reaches ground at exactly this
1771 // bound, so an accepted site is grounded. An unsatisfiable cell
1772 // stamps NOTHING (refuse, never float -- the constraint-solve law)
1773const IG_FOUND: i64 = 3 // foundation skirt courses below the floor (IG_MAXSLOPE + 1)
1774
1775// floor division for ABSOLUTE (possibly negative) coords -- truncating division reads the cell
1776// left of origin as cell 0 twice, which would double-place one building at the world seam
1777func igfloor(a: i64, b: i64) -> i64 {
1778 var q: i64 = a/b
1779 if a % b < 0 { q = q - 1 }
1780 return q
1781}
1782func ig_rotx(r: i64, x: i64, z: i64) -> i64 {
1783 if r == 1 { return z }
1784 if r == 2 { return 0 - x }
1785 if r == 3 { return 0 - z }
1786 return x
1787}
1788func ig_rotz(r: i64, x: i64, z: i64) -> i64 {
1789 if r == 1 { return 0 - x }
1790 if r == 2 { return 0 - z }
1791 if r == 3 { return x }
1792 return z
1793}
1794func genbuildings(base: i64, lx0: i64, lx1: i64, lz0: i64, lz1: i64, sd: i64) -> i64 {
1795 let sp: *i64 = wsp(base)
1796 if sp[P_BLDG] <= 0 { return 0 }
1797 let s: *i64 = wst(base)
1798 let wl: i64 = sp[P_WATER]
1799 let arch: i64 = sp[P_BLDGSPEC] & 15
1800 let dims: i64 = igd_dims(arch)
1801 let bw: i64 = dims & 255
1802 let bd: i64 = (dims >> 8) & 255
1803 let bh: i64 = (dims >> 16) & 255
1804 let mats: i64 = igd_mats(arch)
1805 let mwall: i64 = mats & 255
1806 let mfloor: i64 = (mats >> 8) & 255
1807 let mroof: i64 = (mats >> 16) & 255
1808 let dxo: i64 = igd_doorx(arch)
1809 let gx0: i64 = igfloor(s[S_WOX] + lx0 - BLDG_SITE + 1, BLDG_SITE)
1810 let gx1: i64 = igfloor(s[S_WOX] + lx1 + BLDG_SITE - 1, BLDG_SITE)
1811 let gz0: i64 = igfloor(s[S_WOZ] + lz0 - BLDG_SITE + 1, BLDG_SITE)
1812 let gz1: i64 = igfloor(s[S_WOZ] + lz1 + BLDG_SITE - 1, BLDG_SITE)
1813 var gz: i64 = gz0
1814 while gz <= gz1 {
1815 var gx: i64 = gx0
1816 while gx <= gx1 {
1817 var put: i64 = 1
1818 if whash(gx*7 + 1, gz*13 + 5, sd + 331) % sp[P_BLDG] != 0 { put = 0 }
1819 let rot: i64 = whash(gx*17 + 2, gz*19 + 6, sd + 499) % 4
1820 let bv: i64 = whash(gx*23 + 4, gz*29 + 8, sd + 541) % IGD_NVAR
1821 // W3 SOLVE: the anchor is not rolled, it is SEARCHED. 3x3 candidates per cell,
1822 // flattest wins (first-min on the fixed scan order = deterministic), and wheight is
1823 // pure noise over absolute coords, so the choice is window-independent (T73's law).
1824 // The measured failure this replaces: one hash-jittered roll + a dh>1 veto rejected
1825 // EVERY vale and craft cell (probe 2026-08-18: dhmax 2..12 across 36 cells) -- a
1826 // stamp with a veto is not a solve, and the village never existed.
1827 var axc: i64 = 0
1828 var azc: i64 = 0
1829 var h: i64 = 0
1830 var bestd9: i64 = 99
1831 if put == 1 {
1832 var co9: i64 = 0
1833 while co9 < 9 {
1834 let cox9: i64 = gx*BLDG_SITE + IG_SCAN0 + (co9 % 3)*IG_SCANSTEP
1835 let coz9: i64 = gz*BLDG_SITE + IG_SCAN0 + (co9 / 3)*IG_SCANSTEP
1836 let hh9: i64 = wsp_beach_ocean(sp, cox9, coz9, wheight(base, cox9, coz9, sd)) // GE13: a site in the sea reads its SHAPED height -> the h<=wl veto below refuses it
1837 var dmax9: i64 = 0
1838 var ci: i64 = 0
1839 while ci < 4 {
1840 var clx: i64 = 0 - 1
1841 var clz: i64 = 0 - 1
1842 if ci == 1 { clx = bw }
1843 if ci == 2 { clz = bd }
1844 if ci == 3 { clx = bw; clz = bd }
1845 let cax: i64 = cox9 + ig_rotx(rot, clx - bw/2, clz - bd/2)
1846 let caz: i64 = coz9 + ig_rotz(rot, clx - bw/2, clz - bd/2)
1847 var dh: i64 = wsp_beach_ocean(sp, cax, caz, wheight(base, cax, caz, sd)) - hh9
1848 if dh < 0 { dh = 0 - dh }
1849 if dh > dmax9 { dmax9 = dh }
1850 ci = ci + 1
1851 }
1852 if dmax9 < bestd9 { bestd9 = dmax9; axc = cox9; azc = coz9; h = hh9 }
1853 co9 = co9 + 1
1854 }
1855 if bestd9 > IG_MAXSLOPE { put = 0 }
1856 if h <= wl { put = 0 }
1857 if h >= sp[P_SNOW] { put = 0 }
1858 if h + bh + 2 >= WY { put = 0 }
1859 }
1860 if put == 1 {
1861 // floor+foundation ring at h, walls h+1..h+bh (door and windows carved as air,
1862 // interior cleared of terrain and canopy), roof plate at h+bh+1
1863 var lz: i64 = 0 - 1
1864 while lz <= bd {
1865 var lx: i64 = 0 - 1
1866 while lx <= bw {
1867 let ax: i64 = axc + ig_rotx(rot, lx - bw/2, lz - bd/2) - s[S_WOX]
1868 let az: i64 = azc + ig_rotz(rot, lx - bw/2, lz - bd/2) - s[S_WOZ]
1869 var ring: i64 = 0
1870 if lx == 0 - 1 { ring = 1 }
1871 if lx == bw { ring = 1 }
1872 if lz == 0 - 1 { ring = 1 }
1873 if lz == bd { ring = 1 }
1874 var fb2: i64 = mfloor
1875 if ring == 1 { fb2 = mwall }
1876 vset_box(base, ax, h, az, fb2, lx0, lx1, lz0, lz1)
1877 // foundation skirt: IG_FOUND courses below the floor on the ring, so a
1878 // site accepted at the IG_MAXSLOPE bound is grounded on every side. On
1879 // flat ground the courses embed in terrain (a real footing, seen when
1880 // mined) -- bounded, deterministic, no reads.
1881 if ring == 1 {
1882 var fy9: i64 = h - 1
1883 while fy9 >= h - IG_FOUND {
1884 if fy9 >= 0 { vset_box(base, ax, fy9, az, mwall, lx0, lx1, lz0, lz1) }
1885 fy9 = fy9 - 1
1886 }
1887 }
1888 var wy2: i64 = h + 1
1889 while wy2 <= h + bh {
1890 var wb2: i64 = 0
1891 if ring == 1 {
1892 wb2 = mwall
1893 if lx == dxo { if lz == 0 - 1 { if wy2 <= h + 2 { wb2 = 0 } } }
1894 if wy2 == h + 2 { if lz == bd/2 {
1895 if lx == 0 - 1 { wb2 = 0 }
1896 if lx == bw { wb2 = 0 }
1897 } }
1898 }
1899 vset_box(base, ax, wy2, az, wb2, lx0, lx1, lz0, lz1)
1900 wy2 = wy2 + 1
1901 }
1902 vset_box(base, ax, h + bh + 1, az, mroof, lx0, lx1, lz0, lz1)
1903 lx = lx + 1
1904 }
1905 lz = lz + 1
1906 }
1907 // the solved furniture rows, rotated with the shell
1908 var fi: i64 = 0
1909 while fi < igd_nf(arch, bv) {
1910 let fr: i64 = igd_f(arch, bv, fi)
1911 let fax: i64 = axc + ig_rotx(rot, (fr & 255) - bw/2, ((fr >> 8) & 255) - bd/2) - s[S_WOX]
1912 let faz: i64 = azc + ig_rotz(rot, (fr & 255) - bw/2, ((fr >> 8) & 255) - bd/2) - s[S_WOZ]
1913 vset_box(base, fax, h + ((fr >> 24) & 255), faz, (fr >> 16) & 255, lx0, lx1, lz0, lz1)
1914 fi = fi + 1
1915 }
1916 // world truth: count the stamp when its anchor lands inside the regen box
1917 let axl: i64 = axc - s[S_WOX]
1918 let azl: i64 = azc - s[S_WOZ]
1919 if axl >= lx0 { if axl < lx1 { if azl >= lz0 { if azl < lz1 {
1920 s[S_BLDG] = s[S_BLDG] + 1
1921 s[S_BLDGX] = axl
1922 s[S_BLDGY] = h
1923 s[S_BLDGZ] = azl
1924 } } } }
1925 }
1926 gx = gx + 1
1927 }
1928 gz = gz + 1
1929 }
1930 return 0
1931}
1932
1933func genworld(base: i64, sd: i64) -> i64 {
1934 let s: *i64 = wst(base)
1935 var z: i64 = 0
1936 while z < WZ {
1937 var x: i64 = 0
1938 while x < WX {
1939 gencol(base, x, z, x + s[S_WOX], z + s[S_WOZ], sd)
1940 x = x + 1
1941 }
1942 z = z + 1
1943 }
1944 gentrees(base, 0, WX, 0, WZ, sd)
1945 genbuildings(base, 0, WX, 0, WZ, sd)
1946 return 0
1947}
1948
1949// ---------- v6 STREAMING: slide the window one stride along x or z ----------
1950// The world is unbounded; the arena is the cache. Order matters: move kept voxels -> bump the
1951// origin -> regen the incoming strip from absolute coords -> repaint its trees -> overlay the
1952// journal (edits WIN) -> translate every arena-space coordinate (player, spawn, mobs) -> rebuild
1953// wmax -> invalidate the crosshair cache. One call = 16 blocks; ticks trigger it at the margins.
1954// Preserve the retained continuous-height cache at the same absolute world coordinates.
1955// Incoming columns are regenerated by gencol after the origin advances.
1956func wc_hq_shift(base: i64, dx: i64, dz: i64) -> i64 {
1957 var z: i64 = 0
1958 var zend: i64 = WZ
1959 var zs: i64 = 1
1960 if dz < 0 { z = WZ - 1; zend = 0 - 1; zs = 0 - 1 }
1961 while z != zend {
1962 var x: i64 = 0
1963 var xend: i64 = WX
1964 var xs: i64 = 1
1965 if dx < 0 { x = WX - 1; xend = 0 - 1; xs = 0 - 1 }
1966 while x != xend {
1967 let sx: i64 = x + dx
1968 let sz: i64 = z + dz
1969 if sx >= 0 { if sx < WX { if sz >= 0 { if sz < WZ {
1970 hq_set(base, x, z, hq_get(base, sx, sz))
1971 } } } }
1972 x = x + xs
1973 }
1974 z = z + zs
1975 }
1976 return 0
1977}
1978
1979func wc_shift(base: i64, dx: i64, dz: i64) -> i64 {
1980 let s: *i64 = wst(base)
1981 let v: *u8 = wvx(base)
1982 let sd: i64 = s[S_SEED]
1983 if dx != 0 {
1984 wc_hq_shift(base, dx, 0)
1985 var y: i64 = 0
1986 while y < WY {
1987 var z: i64 = 0
1988 while z < WZ {
1989 let row: i64 = (y*WZ + z)*WX
1990 if dx > 0 {
1991 var x: i64 = 0
1992 while x < WX - dx { v[row + x] = v[row + x + dx]; x = x + 1 }
1993 } else {
1994 var x2: i64 = WX - 1
1995 while x2 >= 0 - dx { v[row + x2] = v[row + x2 + dx]; x2 = x2 - 1 }
1996 }
1997 z = z + 1
1998 }
1999 y = y + 1
2000 }
2001 s[S_WOX] = s[S_WOX] + dx
2002 var sx0: i64 = 0
2003 var sx1: i64 = 0 - dx
2004 if dx > 0 { sx0 = WX - dx; sx1 = WX }
2005 var rz: i64 = 0
2006 while rz < WZ {
2007 var rx: i64 = sx0
2008 while rx < sx1 { gencol(base, rx, rz, rx + s[S_WOX], rz + s[S_WOZ], sd); rx = rx + 1 }
2009 rz = rz + 1
2010 }
2011 gentrees(base, sx0, sx1, 0, WZ, sd)
2012 genbuildings(base, sx0, sx1, 0, WZ, sd)
2013 ej_overlay(base, sx0, sx1, 0, WZ)
2014 }
2015 if dz != 0 {
2016 wc_hq_shift(base, 0, dz)
2017 var y2: i64 = 0
2018 while y2 < WY {
2019 let plane: i64 = y2*WZ*WX
2020 if dz > 0 {
2021 var z2: i64 = 0
2022 while z2 < WZ - dz {
2023 let dstr: i64 = plane + z2*WX
2024 let srcr: i64 = plane + (z2 + dz)*WX
2025 var x3: i64 = 0
2026 while x3 < WX { v[dstr + x3] = v[srcr + x3]; x3 = x3 + 1 }
2027 z2 = z2 + 1
2028 }
2029 } else {
2030 var z3: i64 = WZ - 1
2031 while z3 >= 0 - dz {
2032 let dstr2: i64 = plane + z3*WX
2033 let srcr2: i64 = plane + (z3 + dz)*WX
2034 var x4: i64 = 0
2035 while x4 < WX { v[dstr2 + x4] = v[srcr2 + x4]; x4 = x4 + 1 }
2036 z3 = z3 - 1
2037 }
2038 }
2039 y2 = y2 + 1
2040 }
2041 s[S_WOZ] = s[S_WOZ] + dz
2042 var sz0: i64 = 0
2043 var sz1: i64 = 0 - dz
2044 if dz > 0 { sz0 = WZ - dz; sz1 = WZ }
2045 var rz2: i64 = sz0
2046 while rz2 < sz1 {
2047 var rx2: i64 = 0
2048 while rx2 < WX { gencol(base, rx2, rz2, rx2 + s[S_WOX], rz2 + s[S_WOZ], sd); rx2 = rx2 + 1 }
2049 rz2 = rz2 + 1
2050 }
2051 gentrees(base, 0, WX, sz0, sz1, sd)
2052 genbuildings(base, 0, WX, sz0, sz1, sd)
2053 ej_overlay(base, 0, WX, sz0, sz1)
2054 }
2055 // translate every arena-space coordinate by the slide
2056 s[S_CX] = s[S_CX] - dx*256
2057 s[S_CZ] = s[S_CZ] - dz*256
2058 s[S_SPX] = wclamp(s[S_SPX] - dx*256, 2*256, (WX - 2)*256)
2059 s[S_SPZ] = wclamp(s[S_SPZ] - dz*256, 2*256, (WZ - 2)*256)
2060 s[S_LBX] = s[S_LBX] - dx
2061 s[S_LBZ] = s[S_LBZ] - dz
2062 let m: *i64 = mobp(base)
2063 var k: i64 = 0
2064 while k < en_count(m) {
2065 let h: i64 = en_nth(m, k)
2066 en_set(m, h, MC_X, wclamp(en_get(m, h, MC_X) - dx*256, 2*256, (WX - 2)*256))
2067 en_set(m, h, MC_Z, wclamp(en_get(m, h, MC_Z) - dz*256, 2*256, (WZ - 2)*256))
2068 k = k + 1
2069 }
2070 wc_wmax(base)
2071 wc_soft_seat_all(base) // the world slid under every girl: re-seat springs
2072 if dx != 0 { s[S_AGEN] = s[S_AGEN] + 1 } else { if dz != 0 { s[S_AGEN] = s[S_AGEN] + 1 } } // GE57: a shift that MOVED is a new arena generation (a zero shift is not)
2073 s[S_HOK] = 0
2074 return 0
2075}
2076
2077// ---------- DDA raycast ----------
2078// marches from (S_CX,S_CY,S_CZ) along (dx,dy,dz) (any scale). On hit writes out[0..4] =
2079// cellx,celly,cellz,face,tcross and returns the step count; returns -1 on miss (sky).
2080// skipw=1 treats water as air (the transparency continuation ray). The voxel read is INLINED --
2081// this loop runs ~2-8M times a second and a per-step call was the measured overhead.
2082// GE53: march the continuous surface. pos(t) = cam + d*t/65536 (Q8). Quarter-cell steps along the fastest
2083// axis, then six bisections at the crossing -- sub-block precision on a field that is itself sub-block.
2084// Returns the cells travelled (the fog term); writes the column's top cell, face 3 and t. -1 = no ground.
2085func wray_surf(base: i64, dx: i64, dy: i64, dz: i64, maxsteps: i64, out: *i64) -> i64 {
2086 let s: *i64 = wst(base)
2087 let cxq: i64 = s[S_CX]
2088 let cyq: i64 = s[S_CY]
2089 let czq: i64 = s[S_CZ]
2090 var dm: i64 = dx
2091 if dm < 0 { dm = 0 - dm }
2092 var ady: i64 = dy
2093 if ady < 0 { ady = 0 - ady }
2094 var adz: i64 = dz
2095 if adz < 0 { adz = 0 - adz }
2096 if ady > dm { dm = ady }
2097 if adz > dm { dm = adz }
2098 if dm == 0 { return 0 - 1 }
2099 let dt: i64 = WC_SURF_STEP_Q8*WATER_MAGIC_65536/dm // a quarter cell along the fastest axis
2100 var t: i64 = 0
2101 var tprev: i64 = 0
2102 var step: i64 = 0
2103 let nmax: i64 = maxsteps*4
2104 var hit: i64 = 0
2105 while step < nmax {
2106 t = t + dt
2107 let py: i64 = cyq + dy*t/WATER_MAGIC_65536
2108 let px: i64 = cxq + dx*t/WATER_MAGIC_65536
2109 let pz: i64 = czq + dz*t/WATER_MAGIC_65536
2110 if dy >= 0 { if py > WY*256 { return 0 - 1 } } // climbing above every column: sky
2111 if px < 0 - 8*256 { return 0 - 1 }
2112 if px > (WX + 8)*256 { return 0 - 1 }
2113 if pz < 0 - 8*256 { return 0 - 1 }
2114 if pz > (WZ + 8)*256 { return 0 - 1 }
2115 let hs: i64 = wc_surface_source(base, px, pz)
2116 if hs >= 0 { if py <= hs { hit = 1; step = nmax } }
2117 if hit == 0 { tprev = t; step = step + 1 }
2118 }
2119 if hit == 0 { return 0 - 1 }
2120 var lo: i64 = tprev
2121 var hi: i64 = t
2122 var k: i64 = 0
2123 while k < 6 {
2124 let mid: i64 = (lo + hi)/2
2125 let py2: i64 = cyq + dy*mid/WATER_MAGIC_65536
2126 let px2: i64 = cxq + dx*mid/WATER_MAGIC_65536
2127 let pz2: i64 = czq + dz*mid/WATER_MAGIC_65536
2128 let h2: i64 = wc_surface_source(base, px2, pz2)
2129 var below: i64 = 0
2130 if h2 >= 0 { if py2 <= h2 { below = 1 } }
2131 if below == 1 { hi = mid } else { lo = mid }
2132 k = k + 1
2133 }
2134 let th: i64 = hi
2135 let hx: i64 = cxq + dx*th/WATER_MAGIC_65536
2136 let hz: i64 = czq + dz*th/WATER_MAGIC_65536
2137 let cx: i64 = hx >> 8
2138 let cz: i64 = hz >> 8
2139 // the colour cell: the column's top SOLID block, found by scanning down from the hit cell -- so it
2140 // matches whatever gencol cut, whichever rounding convention built the column (the field rounds,
2141 // wheight_raw truncates; guessing the index from the field put the cell one block up, in air)
2142 let hy: i64 = cyq + dy*th/WATER_MAGIC_65536
2143 var yy: i64 = hy >> 8
2144 if yy > WY - 1 { yy = WY - 1 }
2145 var run9: i64 = 1
2146 while run9 == 1 {
2147 if yy <= 0 { run9 = 0 }
2148 if run9 == 1 { if vget(base, cx, yy, cz) != 0 { run9 = 0 } }
2149 if run9 == 1 { yy = yy - 1 }
2150 }
2151 out[0] = cx
2152 out[1] = yy
2153 out[2] = cz
2154 out[3] = 3
2155 out[4] = th
2156 return th/(dt*(256/WC_SURF_STEP_Q8)) + 1
2157}
2158// GE53: under P_SURF the ground is the field and structures stay cells -- the nearer hit wins. With the
2159// row OFF this is exactly the cell marcher (wray3 with no terrain skip), so every shipped world is untouched.
2160func wray2(base: i64, dx: i64, dy: i64, dz: i64, maxsteps: i64, out: *i64, skipw: i64) -> i64 {
2161 if wsp(base)[P_SURF] != 1 { return wray3(base, dx, dy, dz, maxsteps, out, skipw, 0) }
2162 let ss: i64 = wray_surf(base, dx, dy, dz, maxsteps, out)
2163 let s0: i64 = out[0]
2164 let s1: i64 = out[1]
2165 let s2: i64 = out[2]
2166 let s3: i64 = out[3]
2167 let s4: i64 = out[4]
2168 let sd: i64 = wray3(base, dx, dy, dz, maxsteps, out, skipw, 1)
2169 if sd < 0 {
2170 if ss < 0 { return 0 - 1 }
2171 out[0] = s0
2172 out[1] = s1
2173 out[2] = s2
2174 out[3] = s3
2175 out[4] = s4
2176 return ss
2177 }
2178 if ss < 0 { return sd }
2179 if out[4] <= s4 { return sd }
2180 out[0] = s0
2181 out[1] = s1
2182 out[2] = s2
2183 out[3] = s3
2184 out[4] = s4
2185 return ss
2186}
2187func wray3(base: i64, dx: i64, dy: i64, dz: i64, maxsteps: i64, out: *i64, skipw: i64, skipt: i64) -> i64 {
2188 let s: *i64 = wst(base)
2189 var cxq: i64 = s[S_CX]
2190 var cyq: i64 = s[S_CY]
2191 var czq: i64 = s[S_CZ]
2192 var cellx: i64 = cxq >> 8
2193 var celly: i64 = cyq >> 8
2194 var cellz: i64 = czq >> 8
2195 let HUGE: i64 = RAY_HUGE
2196 var stpx: i64 = 1
2197 if dx < 0 { stpx = 0-1 }
2198 var stpy: i64 = 1
2199 if dy < 0 { stpy = 0-1 }
2200 var stpz: i64 = 1
2201 if dz < 0 { stpz = 0-1 }
2202 // t units: pos_q8(t) = pos + d*t/65536; crossing one cell on axis c costs 256*65536/|dc|
2203 var tdx: i64 = HUGE
2204 if dx != 0 { tdx = 256*WATER_MAGIC_65536 / dx; if tdx < 0 { tdx = 0 - tdx } }
2205 var tdy: i64 = HUGE
2206 if dy != 0 { tdy = 256*WATER_MAGIC_65536 / dy; if tdy < 0 { tdy = 0 - tdy } }
2207 var tdz: i64 = HUGE
2208 if dz != 0 { tdz = 256*WATER_MAGIC_65536 / dz; if tdz < 0 { tdz = 0 - tdz } }
2209 var bx: i64 = (cellx << 8) - cxq // distance to boundary, Q8 (negative side)
2210 if stpx == 1 { bx = bx + 256 }
2211 var tmx: i64 = HUGE
2212 if dx != 0 { tmx = bx*WATER_MAGIC_65536 / dx; if tmx < 0 { tmx = 0 - tmx } }
2213 var by: i64 = (celly << 8) - cyq
2214 if stpy == 1 { by = by + 256 }
2215 var tmy: i64 = HUGE
2216 if dy != 0 { tmy = by*WATER_MAGIC_65536 / dy; if tmy < 0 { tmy = 0 - tmy } }
2217 var bz: i64 = (cellz << 8) - czq
2218 if stpz == 1 { bz = bz + 256 }
2219 var tmz: i64 = HUGE
2220 if dz != 0 { tmz = bz*WATER_MAGIC_65536 / dz; if tmz < 0 { tmz = 0 - tmz } }
2221 let vxp: *u8 = (base + O_VOX) as *u8
2222 var step: i64 = 0
2223 while step < maxsteps {
2224 var face: i64 = 0
2225 var tcross: i64 = 0
2226 if tmx <= tmy { if tmx <= tmz {
2227 cellx = cellx + stpx
2228 tcross = tmx
2229 tmx = tmx + tdx
2230 face = 1
2231 if stpx == 1 { face = 2 } // stepped +x => hit the -x... face 2 = west-lit
2232 } }
2233 if face == 0 { if tmy <= tmz {
2234 celly = celly + stpy
2235 tcross = tmy
2236 tmy = tmy + tdy
2237 face = 3
2238 if stpy == 1 { face = 4 } // stepped up => hit the block's bottom
2239 } }
2240 if face == 0 {
2241 cellz = cellz + stpz
2242 tcross = tmz
2243 tmz = tmz + tdz
2244 face = 5
2245 if stpz == 1 { face = 6 }
2246 }
2247 if celly >= WY { if stpy >= 0 { return 0 - 1 } } // heading skyward above the world
2248 if celly > s[S_WMAX] { if stpy >= 0 { return 0 - 1 } } // above every solid block, not diving
2249 if cellx < 0-8 { return 0 - 1 }
2250 if cellx > WX+8 { return 0 - 1 }
2251 if cellz < 0-8 { return 0 - 1 }
2252 if cellz > WZ+8 { return 0 - 1 }
2253 if celly < 0 { return 0 - 1 }
2254 var b: i64 = 0
2255 if cellx >= 0 { if cellx < WX { if celly < WY { if cellz >= 0 { if cellz < WZ {
2256 b = (vxp[(celly*WZ + cellz)*WX + cellx] & 0xff) as i64
2257 } } } } }
2258 if skipw == 1 { if b == 4 { b = 0 } }
2259 if skipt == 1 { if wterrain(b) == 1 { b = 0 } } // GE53: the ground is the field, not these cells
2260 if b != 0 {
2261 out[0] = cellx
2262 out[1] = celly
2263 out[2] = cellz
2264 out[3] = face
2265 out[4] = tcross // crossing t: hit point = pos + d*t/WATER_MAGIC_65536 (Q8)
2266 return step + 1
2267 }
2268 step = step + 1
2269 }
2270 return 0 - 1
2271}
2272
2273func wray(base: i64, dx: i64, dy: i64, dz: i64, maxsteps: i64, out: *i64) -> i64 {
2274 return wray2(base, dx, dy, dz, maxsteps, out, 0)
2275}
2276
2277// block base colour -- from the SPEC PALETTE (the game's look is data, not code)
2278func wcol(base: i64, b: i64) -> i64 {
2279 if b < 0 { return wpack(255, 0, 255) }
2280 if b >= 12 { if b <= 16 { return wsp(base)[P_PAL2 + b - 12] } }
2281 if b > 16 { return wpack(255, 0, 255) }
2282 if b > 11 { return wpack(255, 0, 255) }
2283 return wsp(base)[P_PAL + b]
2284}
2285// hotbar slot -> placeable block type
2286func sel_block(sel: i64) -> i64 {
2287 if sel == 1 { return 2 } // dirt
2288 if sel == 2 { return 6 } // wood
2289 if sel == 3 { return 7 } // leaves
2290 if sel == 4 { return 5 } // sand
2291 if sel == 5 { return B_FARM } // the HOE: tills the targeted grass/dirt top
2292 if sel == 6 { return B_CROP0 } // SEEDS: plant onto farmland
2293 return 3 // stone
2294}
2295// face brightness permil: top lit, bottom dark, x/z sides distinct so edges READ as 3d
2296func wface_l(face: i64) -> i64 {
2297 if face == 3 { return 1000 }
2298 if face == 4 { return 420 }
2299 if face == 1 { return 760 }
2300 if face == 2 { return 700 }
2301 if face == 5 { return 620 }
2302 return 560
2303}
2304func wsky(base: i64, syy: i64) -> i64 {
2305 let sp: *i64 = wsp(base)
2306 let hor: i64 = sp[P_SKYHOR]
2307 let top: i64 = sp[P_SKYTOP]
2308 // DERIVED, NOT PICKED (2026-08-29). RH is the q=8 fossil: line 91 of this file declares that
2309 // no resolution number below it is chosen by hand, and RW/RH/FOC three lines under that are
2310 // exactly 1920/8, 1200/8 and 1920/16. This function divided the horizon-to-zenith ramp by that
2311 // frozen 150 while the frame is wc_rh(base) tall, so for any q < 8 the ramp COMPLETED in the
2312 // bottom 150 rows and every row above saturated at P_SKYTOP -- the two spec rows describe a
2313 // gradient the visitor never saw. At q=1, which is exactly what nx_world_snap forces through
2314 // WS_Q_NATIVE for published world art, that is 87.5% of the sky column flat.
2315 // base is already a parameter here and wc_rh is the declared ONE OWNER of the written extent,
2316 // so the derivation needs no new plumbing and no hoist.
2317 var rh: i64 = wc_rh(base)
2318 if rh < 1 { rh = 1 } // q is 1..24 so this cannot fire; it exists so
2319 // that a bad q can never divide by zero here
2320 let t: i64 = wclamp(syy + rh/2, 0, rh) // 0 bottom .. rh top
2321 let r: i64 = (hor & 255) + ((top & 255) - (hor & 255))*t/rh
2322 let g: i64 = ((hor >> 8) & 255) + (((top >> 8) & 255) - ((hor >> 8) & 255))*t/rh
2323 let b: i64 = ((hor >> 16) & 255) + (((top >> 16) & 255) - ((hor >> 16) & 255))*t/rh
2324 return wpack(r, g, b)
2325}
2326// clouds: a flat noise plane above the world, sampled where an upward ray crosses it, slowly
2327// drifting with time. Returns 0..255 coverage for blending into the sky.
2328func wcloud(camx: i64, camy: i64, camz: i64, dx: i64, dy: i64, dz: i64, t: i64) -> i64 {
2329 if dy < 40 { return 0 }
2330 let plane: i64 = 56*256 // cloud deck above the 48-high world
2331 let tq: i64 = (plane - camy)*WATER_MAGIC_65536/dy
2332 if tq <= 0 { return 0 }
2333 let cx: i64 = (camx + dx*tq/WATER_MAGIC_65536) >> 9 // 2-block cloud texels
2334 let cz: i64 = (camz + dz*tq/WATER_MAGIC_65536) >> 9
2335 let n: i64 = wnoise(cx + t/40, cz + t/90, 6, 777)
2336 if n < 148 { return 0 }
2337 var cov: i64 = (n - 148)*255/60
2338 if cov > 235 { cov = 235 }
2339 return cov
2340}
2341// sky with a SUN: disc + glow around the sun's projected ray-pixel position (sunon=0 -> plain sky)
2342func wsky2(base: i64, syy: i64, px: i64, py: i64, sunx: i64, suny: i64, sunon: i64) -> i64 {
2343 let base2: i64 = wsky(base, syy)
2344 if sunon == 0 { return base2 }
2345 let ddx: i64 = px - sunx
2346 let ddy: i64 = py - suny
2347 let d2: i64 = ddx*ddx + ddy*ddy
2348 if d2 < 36 { return wpack(255, 250, 224) } // the disc
2349 if d2 < 900 { // the glow
2350 let w2: i64 = 255 - d2*255/900
2351 var r: i64 = (base2 & 255) + (255 - (base2 & 255))*w2/300
2352 var g: i64 = ((base2 >> 8) & 255) + (250 - ((base2 >> 8) & 255))*w2/340
2353 var b: i64 = ((base2 >> 16) & 255) + (224 - ((base2 >> 16) & 255))*w2/460
2354 return wpack(wclamp(r,0,255), wclamp(g,0,255), wclamp(b,0,255))
2355 }
2356 // ordered 2x2 dither breaks the gradient banding lines
2357 if ((px ^ py) & 1) == 1 {
2358 return wpack(wclamp((base2 & 255) + 2, 0, 255), wclamp(((base2 >> 8) & 255) + 2, 0, 255), wclamp(((base2 >> 16) & 255) + 2, 0, 255))
2359 }
2360 return base2
2361}
2362// textured face shading: per-texel hash variation from the HIT POINT's in-face UV (Q8 fractions),
2363// per-type character (wood grain, leaf speckle, water shimmer, ore mottle), edge BEVEL so the
2364// block grid reads crisply, then face light and step fog. All integer, all deterministic.
2365// corner AO: darken a face edge when a solid block sits beside it in the face's outward layer --
2366// the classic soft-corner cue that makes voxel scenes read as lit geometry instead of flat tiles
2367func wao(base: i64, cx2: i64, cy2b: i64, cz2: i64, face: i64, u: i64, v: i64) -> i64 {
2368 var ox2: i64 = cx2
2369 var oy2: i64 = cy2b
2370 var oz2: i64 = cz2
2371 if face == 1 { ox2 = ox2 + 1 }
2372 if face == 2 { ox2 = ox2 - 1 }
2373 if face == 3 { oy2 = oy2 + 1 }
2374 if face == 4 { oy2 = oy2 - 1 }
2375 if face == 5 { oz2 = oz2 + 1 }
2376 if face == 6 { oz2 = oz2 - 1 }
2377 var ao: i64 = 0
2378 // u-axis neighbours (u maps to x on y/z faces, to z on x faces)
2379 if u < 44 {
2380 var hit1: i64 = 0
2381 if face == 1 { hit1 = vsolid(base, ox2, oy2, oz2 - 1) }
2382 if face == 2 { hit1 = vsolid(base, ox2, oy2, oz2 - 1) }
2383 if face == 3 { hit1 = vsolid(base, ox2 - 1, oy2, oz2) }
2384 if face == 4 { hit1 = vsolid(base, ox2 - 1, oy2, oz2) }
2385 if face == 5 { hit1 = vsolid(base, ox2 - 1, oy2, oz2) }
2386 if face == 6 { hit1 = vsolid(base, ox2 - 1, oy2, oz2) }
2387 if hit1 == 1 { ao = ao + (44 - u)*30/44 }
2388 }
2389 if u > 211 {
2390 var hit2: i64 = 0
2391 if face == 1 { hit2 = vsolid(base, ox2, oy2, oz2 + 1) }
2392 if face == 2 { hit2 = vsolid(base, ox2, oy2, oz2 + 1) }
2393 if face == 3 { hit2 = vsolid(base, ox2 + 1, oy2, oz2) }
2394 if face == 4 { hit2 = vsolid(base, ox2 + 1, oy2, oz2) }
2395 if face == 5 { hit2 = vsolid(base, ox2 + 1, oy2, oz2) }
2396 if face == 6 { hit2 = vsolid(base, ox2 + 1, oy2, oz2) }
2397 if hit2 == 1 { ao = ao + (u - 211)*30/44 }
2398 }
2399 // v-axis neighbours (v maps to z on top/bottom faces, to y on side faces)
2400 if v < 44 {
2401 var hit3: i64 = 0
2402 if face == 3 { hit3 = vsolid(base, ox2, oy2, oz2 - 1) }
2403 if face == 4 { hit3 = vsolid(base, ox2, oy2, oz2 - 1) }
2404 if face == 1 { hit3 = vsolid(base, ox2, oy2 - 1, oz2) }
2405 if face == 2 { hit3 = vsolid(base, ox2, oy2 - 1, oz2) }
2406 if face == 5 { hit3 = vsolid(base, ox2, oy2 - 1, oz2) }
2407 if face == 6 { hit3 = vsolid(base, ox2, oy2 - 1, oz2) }
2408 if hit3 == 1 { ao = ao + (44 - v)*30/44 }
2409 }
2410 if v > 211 {
2411 var hit4: i64 = 0
2412 if face == 3 { hit4 = vsolid(base, ox2, oy2, oz2 + 1) }
2413 if face == 4 { hit4 = vsolid(base, ox2, oy2, oz2 + 1) }
2414 if face == 1 { hit4 = vsolid(base, ox2, oy2 + 1, oz2) }
2415 if face == 2 { hit4 = vsolid(base, ox2, oy2 + 1, oz2) }
2416 if face == 5 { hit4 = vsolid(base, ox2, oy2 + 1, oz2) }
2417 if face == 6 { hit4 = vsolid(base, ox2, oy2 + 1, oz2) }
2418 if hit4 == 1 { ao = ao + (v - 211)*30/44 }
2419 }
2420 if ao > 45 { ao = 45 }
2421 return ao
2422}
2423func wshade2(base: i64, b0: i64, face: i64, steps: i64, syy: i64, hpx: i64, hpy: i64, hpz: i64, t2: i64, clx: i64, cly: i64, clz: i64) -> i64 {
2424 var u: i64 = hpx & 255
2425 var v: i64 = hpz & 255
2426 if face == 1 { u = hpz & 255; v = hpy & 255 }
2427 if face == 2 { u = hpz & 255; v = hpy & 255 }
2428 if face == 5 { u = hpx & 255; v = hpy & 255 }
2429 if face == 6 { u = hpx & 255; v = hpy & 255 }
2430 // grass block SIDES are dirt with a grass strip at the top edge (the classic block identity)
2431 var b: i64 = b0
2432 if b0 == 1 { if face != 3 { if face != 4 {
2433 b = 2
2434 if v > 206 { b = 1 }
2435 } } }
2436 var tex: i64 = 0
2437 if b == 6 { // wood: vertical grain stripes
2438 tex = whash(u/12 + (hpx >> 8)*7 + (hpz >> 8)*13, 3, 99) % 256
2439 }
2440 if b != 6 {
2441 var amp: i64 = 70
2442 if b == 1 { amp = 95 }
2443 if b == 2 { amp = 85 }
2444 if b == 7 { amp = 130 }
2445 if b == 5 { amp = 55 }
2446 var us: i64 = u/16
2447 var vs: i64 = v/16
2448 if b == 4 { // water: time-drifted shimmer
2449 us = us + t2/3
2450 vs = vs - t2/5
2451 amp = 110
2452 }
2453 tex = whash(us + (hpx >> 8)*31, vs + (hpy >> 8)*17 + (hpz >> 8)*7, b*131) % 256
2454 tex = 128 + (tex - 128)*amp/130
2455 }
2456 // ART STYLE (P_STYLE), read once for this texel. An id this engine does not own falls through
2457 // BOTH style tests below and renders REAL. That is the fail-safe direction and it is chosen,
2458 // not inherited: REAL is the shipped look, so a garbage value poked into the plane degrades to
2459 // "unchanged", never to an undrawn or half-drawn world.
2460 let wst9: i64 = wsp(base)[P_STYLE]
2461 if wst9 == WC_STYLE_FLAT { tex = WC_TEX_NEUTRAL }
2462 var light: i64 = wface_l(face)
2463 // sun-directional face light (sun worlds only): east faces catch it, west faces shadow
2464 if wsp(base)[P_SUN] == 1 {
2465 if face == 1 { light = light*112/100 }
2466 if face == 2 { light = light*92/100 }
2467 if face == 5 { light = light*104/100 }
2468 }
2469 light = light*(870 + tex*260/256)/1000
2470 let wsurf9: i64 = wsp(base)[P_SURF]
2471 var smooth9: i64 = 0
2472 if wst9 == WC_STYLE_SOFT { smooth9 = 1 }
2473 if wsurf9 == 1 { smooth9 = 1 }
2474 if smooth9 == 0 {
2475 if u < 14 { light = light*82/100 } // edge bevel: the block grid (OFF on a smooth ground)
2476 if u > 241 { light = light*82/100 }
2477 if v < 14 { light = light*82/100 }
2478 if v > 241 { light = light*82/100 }
2479 }
2480 var ao2: i64 = 0
2481 if wsurf9 == 0 { ao2 = wao(base, clx, cly, clz, face, u, v) } // GE53: a continuous surface has no cell corners to darken
2482 if ao2 > 0 { light = light*(100 - ao2)/100 } // soft corners where geometry meets
2483 if wst9 == WC_STYLE_SOFT { if face == 3 {
2484 // ground: the heightfield normal replaces the flat top-face light; texture and AO re-applied
2485 light = wsoft_ground_light(base, clx, cly, clz, u, v)*(870 + tex*260/256)/1000
2486 if ao2 > 0 { light = light*(100 - ao2)/100 }
2487 } }
2488 if wsurf9 == 1 { if face == 3 {
2489 light = wsurf_light(base, hpx, hpz)*(870 + tex*260/256)/1000 // GE53: the field's own gradient lights the ground
2490 } }
2491 // TOON banding sits AFTER face light, texture and AO and BEFORE colour and fog -- the same
2492 // point in the pipeline at which the incumbent bands its own "bright". Fog must stay OUTSIDE
2493 // the band, or distance itself would quantise into two steps and the horizon would read as a
2494 // wall rather than as depth. Written as ONE assignment through a temporary rather than as two
2495 // ifs on the same variable: two ifs where the first mutates the value the second tests is the
2496 // desync idiom this estate has been bitten by, and it costs nothing to be immune to it.
2497 if wst9 == WC_STYLE_TOON {
2498 var lb9: i64 = WC_TOON_HI
2499 if light < WC_TOON_CUT { lb9 = WC_TOON_LO }
2500 light = lb9
2501 }
2502 let c: i64 = wcol(base, b)
2503 var r: i64 = (c & 255) * light / 1000
2504 var g: i64 = ((c >> 8) & 255) * light / 1000
2505 var bl: i64 = ((c >> 16) & 255) * light / 1000
2506 let sk: i64 = wsky(base, syy)
2507 var fog: i64 = steps*280/MAXSTEPS
2508 if fog > 236 { fog = 236 }
2509 r = r + ((sk & 255) - r)*fog/256
2510 g = g + (((sk >> 8) & 255) - g)*fog/256
2511 bl = bl + (((sk >> 16) & 255) - bl)*fog/256
2512 return wpack(wclamp(r,0,255), wclamp(g,0,255), wclamp(bl,0,255))
2513}
2514
2515// THE GAME SPEC WRITER -- two complete game identities as DATA over one engine.
2516// v0 = NISHI CRAFT (sunlit overworld). v1 = NISHI DEPTHS (twilight cavern plateau: no sun/clouds/
2517// trees, ember horizon, vast cave nets, mossy basalt, glowing ores and glow-mobs).
2518func wc_spec(base: i64, v: i64) -> i64 {
2519 let sp: *i64 = wsp(base)
2520 var k: i64 = 0
2521 while k < WC_SPECN { sp[k] = 0; k = k + 1 } // E1: was a bare 64. This loop is what re-arms
2522 // P_ERTAL to its not-yet-measured sentinel on
2523 // every identity load, so leaving it at 64 would
2524 // have carried one world's talus into the next.
2525 // GE13b THE WARDROBE -- identity-independent DATA, written before any identity branch so every
2526 // world owns the same table by default and may override a row below (or through a recipe row
2527 // once the page validator admits 70-78). Palettes are hue RANGES, never one colour: the genome
2528 // picks the stop. Swimwear vivid and wide (resort colour), the cover-up sun-bleached, casual
2529 // muted, the evening dress deep and narrow -- the one dress every girl used to wear.
2530 // coverage category hue span sat lit
2531 sp[P_GARM + GAR_BIKINI_TOP - 1] = gar_pack(GAR_COV_TOP, GAR_CAT_SWIM, 330, 120, 13, 8)
2532 sp[P_GARM + GAR_BIKINI_BOT - 1] = gar_pack(GAR_COV_BOT, GAR_CAT_SWIM, 330, 120, 13, 8)
2533 sp[P_GARM + GAR_ONEPIECE - 1] = gar_pack(GAR_COV_FULL, GAR_CAT_SWIM, 180, 100, 12, 6)
2534 sp[P_GARM + GAR_SARONG - 1] = gar_pack(GAR_COV_BOT, GAR_CAT_COVER, 20, 60, 9, 11)
2535 sp[P_GARM + GAR_SUNDRESS - 1] = gar_pack(GAR_COV_FULL, GAR_CAT_CASUAL, 40, 80, 8, 12)
2536 sp[P_GARM + GAR_TEE - 1] = gar_pack(GAR_COV_TOP, GAR_CAT_CASUAL, 200, 160, 6, 10)
2537 sp[P_GARM + GAR_SHORTS - 1] = gar_pack(GAR_COV_BOT, GAR_CAT_CASUAL, 30, 40, 5, 6)
2538 sp[P_GARM + GAR_SKIRT - 1] = gar_pack(GAR_COV_BOT, GAR_CAT_CASUAL, 340, 80, 7, 7)
2539 sp[P_GARM + GAR_DRESS - 1] = gar_pack(GAR_COV_FULL, GAR_CAT_EVENING, 250, 90, 10, 4)
2540 if v == 3 {
2541 // v3 = NISHI VALE, the MEDIEVAL VILLAGE: rolling green highland, deep woods, cold
2542 // snowline, cave-riddled stone. THIRD WORLD, ZERO ENGINE CODE -- the recombination
2543 // claim at n=3. Wardens run wide here (P_WARD), so a traveler arrives to REAL stakes.
2544 sp[P_TBASE] = 8
2545 sp[P_TAMP1] = 22
2546 sp[P_TAMP2] = 7
2547 sp[P_WATER] = 7
2548 sp[P_SNOW] = 26
2549 sp[P_TREE] = 11 // deep woods, tuned to the PUBLISHED
2550 // 500-800 trees/ha band -- 19 measured 372/ha,
2551 // barely half a real forest (T53; ported from
2552 // the laptop line 2026-08-02, same fork as
2553 // P_HISTAGE -- the fix existed and never landed)
2554 sp[P_TREEMAX] = 25 // woods climb to the snowline here
2555 sp[P_HISTAGE] = 0 // MEASURED, not assumed: symmetric value-
2556 // noise yields HI ~594 permil = mature
2557 sp[P_CAVETH] = 168 // more cavern than craft's 182
2558 sp[P_SKYTOP] = wpack(86, 122, 176)
2559 sp[P_SKYHOR] = wpack(196, 200, 206)
2560 sp[P_SUN] = 1
2561 sp[P_CLOUD] = 1
2562 sp[P_PAL + 1] = wpack(72, 124, 56) // highland grass
2563 sp[P_PAL + 2] = wpack(94, 72, 50) // loam
2564 sp[P_PAL + 3] = wpack(118, 116, 120) // quarry stone
2565 sp[P_PAL + 4] = wpack(44, 82, 140) // cold water
2566 sp[P_PAL + 5] = wpack(190, 178, 150) // riverbank
2567 sp[P_PAL + 6] = wpack(88, 62, 36) // timber
2568 sp[P_PAL + 7] = wpack(40, 96, 44) // dark canopy
2569 sp[P_PAL + 8] = wpack(238, 240, 246) // snow
2570 sp[P_PAL + 9] = wpack(66, 66, 72)
2571 sp[P_PAL + 10] = wpack(176, 142, 118)
2572 sp[P_PAL + 11] = wpack(224, 188, 92)
2573 sp[P_MOBC + 0] = wpack(206, 160, 96)
2574 sp[P_MOBC + 1] = wpack(160, 118, 62)
2575 sp[P_MOBC + 2] = wpack(120, 158, 190)
2576 sp[P_MOBC + 3] = wpack(78, 110, 146)
2577 sp[P_MOBC + 4] = wpack(178, 120, 160)
2578 sp[P_MOBC + 5] = wpack(134, 86, 122)
2579 sp[P_PAL2 + 0] = wpack(88, 60, 38)
2580 sp[P_PAL2 + 1] = wpack(120, 186, 90)
2581 sp[P_PAL2 + 2] = wpack(92, 168, 58)
2582 sp[P_PAL2 + 3] = wpack(230, 200, 82)
2583 sp[P_PAL2 + 4] = wpack(58, 42, 30)
2584 sp[P_DAYLEN] = 72000
2585 sp[P_SEASD] = 3
2586 sp[P_GROWE] = 2400
2587 sp[P_GROWW] = 5 // a harder land: crops take longer
2588 sp[P_GROWD] = 1
2589 sp[P_RAINS + 0] = 420 // wet spring
2590 sp[P_RAINS + 1] = 220
2591 sp[P_RAINS + 2] = 380
2592 sp[P_RAINS + 3] = 180
2593 sp[P_ADV + 0] = (B_CROP2 << 16) | 9
2594 sp[P_ADV + 1] = (1 << 16) | 3
2595 sp[P_ADV + 2] = (4 << 16) | (2 << 8) | 2
2596 sp[P_CURI] = 400
2597 sp[P_OUTFIT] = 0
2598 sp[P_WARD] = 20 // wardens hunt from 20 blocks by DAY here
2599 sp[P_BLDG] = 2 // W3: the medieval village -- densest settlement
2600 sp[P_BLDGSPEC] = 2 // stonecot archetype
2601 return 0
2602 }
2603 if v == 2 {
2604 sp[P_SURF] = 1 // GE53: NISHI SHORE is the NO-VOXEL world -- its ground is the continuous field
2605 // v2 = NISHI SHORE, the REVIEW STAGE (operator 2026-08-02): near-flat warm sand, a
2606 // sea, no trees/caves/snow -- body and sprite rendering judged WITHOUT environment
2607 // distraction, with the outfit dimension ACTIVE (mixed beach). One engine, one more
2608 // identity: this whole world is 30 data rows, which IS the recombination claim.
2609 sp[P_TBASE] = 11
2610 sp[P_TAMP1] = 2
2611 sp[P_TAMP2] = 1
2612 sp[P_WATER] = 9
2613 sp[P_SNOW] = 99
2614 sp[P_TREE] = 0
2615 sp[P_CAVETH] = 255
2616 // GE13: the sea this identity always PROMISED -- P_WATER 9 under base 11 never dipped
2617 // below the waterline, so the data declared a shore the terrain shape could not
2618 // produce (the operator's 2026-08-27 frame: a beach with no ocean). One row fixes it:
2619 // ocean toward +z, shoreline at absolute z=100 (inside the boot window, beyond the
2620 // review stage and both gate fixture plateaus), 20-block beach ramp, seabed 4 =>
2621 // up to 5 blocks of swimmable water at flood level 9.
2622 sp[P_OCEAN] = 0 + (612 << 2) + (20 << 12) + (4 << 18) // edge=+z shore=100+512 slope=20 bed=4
2623 sp[P_SKYTOP] = wpack(110, 168, 230)
2624 sp[P_SKYHOR] = wpack(214, 226, 240)
2625 sp[P_SUN] = 1
2626 sp[P_CLOUD] = 1
2627 sp[P_PAL + 1] = wpack(226, 204, 148) // shore sand (the "grass" slot)
2628 sp[P_PAL + 2] = wpack(206, 180, 128) // packed sand
2629 sp[P_PAL + 3] = wpack(180, 170, 158) // beach rock
2630 sp[P_PAL + 4] = wpack(56, 140, 196) // warm sea
2631 sp[P_PAL + 5] = wpack(232, 214, 160) // dry sand
2632 sp[P_PAL + 6] = wpack(150, 110, 70) // driftwood
2633 sp[P_PAL + 7] = wpack(96, 150, 96) // beach scrub
2634 sp[P_PAL + 8] = wpack(240, 240, 244)
2635 sp[P_PAL + 9] = wpack(120, 116, 110)
2636 sp[P_PAL + 10] = wpack(176, 142, 118)
2637 sp[P_PAL + 11] = wpack(224, 188, 92)
2638 sp[P_MOBC + 0] = wpack(240, 178, 84)
2639 sp[P_MOBC + 1] = wpack(196, 138, 56)
2640 sp[P_MOBC + 2] = wpack(96, 206, 196)
2641 sp[P_MOBC + 3] = wpack(64, 158, 150)
2642 sp[P_MOBC + 4] = wpack(238, 138, 186)
2643 sp[P_MOBC + 5] = wpack(190, 100, 144)
2644 sp[P_PAL2 + 0] = wpack(94, 64, 40)
2645 sp[P_PAL2 + 1] = wpack(120, 186, 90)
2646 sp[P_PAL2 + 2] = wpack(92, 168, 58)
2647 sp[P_PAL2 + 3] = wpack(230, 200, 82)
2648 sp[P_PAL2 + 4] = wpack(64, 46, 32)
2649 sp[P_DAYLEN] = 72000
2650 sp[P_SEASD] = 3
2651 sp[P_GROWE] = 2400
2652 sp[P_GROWW] = 6
2653 sp[P_GROWD] = 1
2654 sp[P_RAINS + 0] = 60 // a review stage stays mostly sunny
2655 sp[P_RAINS + 1] = 40
2656 sp[P_RAINS + 2] = 60
2657 sp[P_RAINS + 3] = 40
2658 sp[P_ADV + 0] = (4 << 16) | (2 << 8) | 4 // the water's edge is the gathering place
2659 sp[P_ADV + 1] = (1 << 16) | 3
2660 sp[P_CURI] = 350
2661 sp[P_OUTFIT] = 1
2662 sp[P_BLDG] = 4 // W3: sparse driftwood huts along the shore
2663 sp[P_BLDGSPEC] = 1 // hut archetype
2664 return 0
2665 }
2666 // FARMING-LIFE rows, shared by every identity (the loop itself is identity-independent DATA)
2667 sp[P_PAL2 + 0] = wpack(94, 64, 40) // tilled farmland, dry
2668 sp[P_PAL2 + 1] = wpack(120, 186, 90) // crop sprout
2669 sp[P_PAL2 + 2] = wpack(92, 168, 58) // crop growing
2670 sp[P_PAL2 + 3] = wpack(230, 200, 82) // crop MATURE (reads golden at a glance)
2671 sp[P_PAL2 + 4] = wpack(64, 46, 32) // farmland wet (soaked dark soil)
2672 sp[P_DAYLEN] = 72000 // 20 real minutes at the fixed 60Hz sim
2673 // tick -- the shipped-sim benchmark band
2674 // (Minecraft 20:00/day, Stardew 14:33,
2675 // Vintage Story ~24:00): a day you can
2676 // farm INSIDE, not a light show
2677 sp[P_SEASD] = 3
2678 sp[P_GROWE] = 2400 // one growth/hydration roll per farm cell
2679 // per ~40s -- Minecraft's random-tick
2680 // cadence (~47s/block avg) on our grid;
2681 // wet stencil den=5 => a watered crop
2682 // matures in ~6.7 min =~ 1/3 day (the
2683 // Minecraft wheat band)
2684 sp[P_GROWW] = 6
2685 sp[P_GROWD] = 1
2686 sp[P_RAINS + 0] = 340 // spring
2687 sp[P_RAINS + 1] = 180 // summer
2688 sp[P_RAINS + 2] = 300 // autumn
2689 sp[P_RAINS + 3] = 120 // winter
2690 sp[P_ADV + 0] = (B_CROP2 << 16) | 9 // a mature field draws foragers (need 0 = hunger)
2691 sp[P_ADV + 1] = (1 << 16) | 3 // grass meadow: light grazing
2692 sp[P_ADV + 2] = (4 << 16) | (2 << 8) | 2 // water's edge: where girls gather to talk
2693 sp[P_CURI] = 350
2694 if v == 1 {
2695 sp[P_TBASE] = 22
2696 sp[P_TAMP1] = 8
2697 sp[P_TAMP2] = 4
2698 sp[P_WATER] = 5
2699 sp[P_SNOW] = 99
2700 sp[P_TREE] = 0
2701 sp[P_CAVETH] = 148
2702 sp[P_SKYTOP] = wpack(28, 22, 40)
2703 sp[P_SKYHOR] = wpack(96, 48, 40)
2704 sp[P_SUN] = 0
2705 sp[P_CLOUD] = 0
2706 sp[P_PAL + 1] = wpack(74, 122, 84) // moss
2707 sp[P_PAL + 2] = wpack(88, 62, 48) // packed earth
2708 sp[P_PAL + 3] = wpack(98, 90, 104) // basalt
2709 sp[P_PAL + 4] = wpack(60, 190, 180) // glow-water
2710 sp[P_PAL + 5] = wpack(120, 100, 80)
2711 sp[P_PAL + 6] = wpack(70, 50, 36)
2712 sp[P_PAL + 7] = wpack(60, 90, 60)
2713 sp[P_PAL + 8] = wpack(200, 200, 210)
2714 sp[P_PAL + 9] = wpack(58, 58, 66)
2715 sp[P_PAL + 10] = wpack(198, 150, 116)
2716 sp[P_PAL + 11] = wpack(255, 206, 96) // gold veins GLOW down here
2717 sp[P_MOBC + 0] = wpack(255, 128, 64) // ember
2718 sp[P_MOBC + 1] = wpack(200, 84, 40)
2719 sp[P_MOBC + 2] = wpack(124, 220, 255) // ice-glow
2720 sp[P_MOBC + 3] = wpack(80, 160, 200)
2721 sp[P_MOBC + 4] = wpack(204, 124, 255) // violet
2722 sp[P_MOBC + 5] = wpack(150, 84, 200)
2723 return 0
2724 }
2725 sp[P_TBASE] = 4
2726 sp[P_TAMP1] = 17
2727 sp[P_TAMP2] = 5
2728 sp[P_WATER] = 9
2729 sp[P_SNOW] = 20
2730 sp[P_TREE] = 43
2731 sp[P_CAVETH] = 182
2732 // DEFAULT SKY TONES DERIVED, NOT PICKED (2026-08-26): zenith = 1 airmass, horizon = the
2733 // Kasten-Young 38-airmass bound, each channel single-scattered by lambda^-4 and display-
2734 // encoded -- nx_atmosphere's own worked example lands at (80,117,176) where the retired
2735 // hand-picked default sat at (86,122,176): the palette was approximating the physics.
2736 // Per-world identity overrides above KEEP their deliberate looks; only the default derives.
2737 let am_t: i64 = nx_atm_airmass_q(0)
2738 let am_h: i64 = nx_atm_airmass_q(NX_ATM_Q)
2739 sp[P_SKYTOP] = wpack(nx_atm_display_255(nx_atm_channel_q(NX_LAMBDA_R_NM, am_t)),
2740 nx_atm_display_255(nx_atm_channel_q(NX_LAMBDA_G_NM, am_t)),
2741 nx_atm_display_255(nx_atm_channel_q(NX_LAMBDA_B_NM, am_t)))
2742 sp[P_SKYHOR] = wpack(nx_atm_display_255(nx_atm_channel_q(NX_LAMBDA_R_NM, am_h)),
2743 nx_atm_display_255(nx_atm_channel_q(NX_LAMBDA_G_NM, am_h)),
2744 nx_atm_display_255(nx_atm_channel_q(NX_LAMBDA_B_NM, am_h)))
2745 sp[P_SUN] = 1
2746 sp[P_CLOUD] = 1
2747 sp[P_PAL + 1] = wpack(84, 158, 62) // grass
2748 sp[P_PAL + 2] = wpack(122, 86, 56) // dirt
2749 sp[P_PAL + 3] = wpack(126, 126, 132) // stone
2750 sp[P_PAL + 4] = wpack(52, 96, 190) // water
2751 sp[P_PAL + 5] = wpack(206, 190, 132) // sand
2752 sp[P_PAL + 6] = wpack(104, 74, 40) // wood
2753 sp[P_PAL + 7] = wpack(52, 122, 44) // leaves
2754 sp[P_PAL + 8] = wpack(232, 238, 244) // snow
2755 sp[P_PAL + 9] = wpack(72, 74, 80) // coal
2756 sp[P_PAL + 10] = wpack(176, 142, 118) // iron
2757 sp[P_PAL + 11] = wpack(224, 188, 92) // gold
2758 sp[P_MOBC + 0] = wpack(240, 178, 84)
2759 sp[P_MOBC + 1] = wpack(196, 138, 56)
2760 sp[P_MOBC + 2] = wpack(96, 206, 196)
2761 sp[P_MOBC + 3] = wpack(64, 158, 150)
2762 sp[P_MOBC + 4] = wpack(238, 138, 186)
2763 sp[P_MOBC + 5] = wpack(190, 100, 144)
2764 sp[P_BLDG] = 3 // W3: scattered cottages in the green hills
2765 sp[P_BLDGSPEC] = 0 // cottage archetype
2766 return 0
2767}
2768
2769// mobs: 12 creatures spawned on grass, deterministic, through the CERTIFIED entity store
2770// (handle = index+generation, stale-handle-proof by construction -- the part's gate owns that claim)
2771func genmobs(base: i64, sd: i64) -> i64 {
2772 let m: *i64 = mobp(base)
2773 en_init(m, MOB_CAP, MOB_NCOMP)
2774 var i: i64 = 0
2775 var placed: i64 = 0
2776 while i < 200 {
2777 if placed < WC_CAST_N {
2778 let mx: i64 = 4 + whash(i*13 + 5, i*7 + 1, sd + 400) % (WX - 8)
2779 let mz: i64 = 4 + whash(i*17 + 3, i*29 + 9, sd + 500) % (WZ - 8)
2780 let h: i64 = wheight(base, mx, mz, sd)
2781 if h < wsp(base)[P_SNOW] - 1 { if vget(base, mx, h, mz) == 1 {
2782 let hd: i64 = en_spawn(m)
2783 if hd > 0 {
2784 en_set(m, hd, MC_X, mx*256 + 128)
2785 en_set(m, hd, MC_Y, wc_contact_floor_q(base,mx*256+128,mz*256+128,WY-1))
2786 en_set(m, hd, MC_Z, mz*256 + 128)
2787 en_set(m, hd, MC_KIND, whash(mx, mz, sd + 600) % 3)
2788 en_set(m, hd, MC_PH, whash(mz, mx, sd + 700) % WATER_MAGIC_4096)
2789 var dg: i64 = 0
2790 if whash(mx + 13, mz + 7, sd + 800) % 3 == 0 { dg = 1 }
2791 en_set(m, hd, MC_DISG, dg)
2792 let g1: i64 = whash(mx*3 + 1, mz*5 + 9, sd + 900)
2793 let g2: i64 = whash(mz*7 + 3, mx*11 + 5, sd + 901)
2794 // HAIR-HUE NIBBLE (2026-08-30, measured in-page: hist(gv&7)=[12,0,0,0,0,0,0,0]): bits 0-3 are
2795 // the declared hair-hue field (MC_GENE layout, L296) yet g1*4096 + g2*16 can never set them, so
2796 // every girl ever spawned shared ONE hair colour (blonde under the old palette, black under the
2797 // melanin one). Roll the low nibble from its own hash lane; the two existing lanes are untouched.
2798 let g3: i64 = whash(mx*13 + 7, mz*17 + 11, sd + 902) % 16
2799 en_set(m, hd, MC_GENE, (g1*WATER_MAGIC_4096 + g2*16 + g3) % WATER_MAGIC_1048576)
2800 placed = placed + 1
2801 }
2802 } }
2803 }
2804 i = i + 1
2805 }
2806 return placed
2807}
2808
2809// ---------- init / tick / render ----------
2810
2811// A spawn-relative scene fixture, written once into the same voxel buffer the GPU uploads.
2812// Preflight prevents partial stamps and preserves existing non-foliage geometry.
2813func wc_spawn_bush(base: i64, forward: i64, lateral: i64, radius: i64, height: i64, material: i64) -> i64 {
2814 if radius < 1 { return 0 - 1 }
2815 if height < 1 { return 0 - 1 }
2816 if radius >= WX/2 { return 0 - 1 }
2817 if height >= WY { return 0 - 1 }
2818 if material != BEACH_RELEASE_MATERIAL { return 0 - 1 }
2819 let s: *i64 = wst(base)
2820 let sy: i64 = it_sin4096(s[S_YAW])
2821 let co: i64 = it_cos4096(s[S_YAW])
2822 let cx: i64 = (s[S_SPX] >> 8) + (sy*forward + co*lateral)/4096
2823 let cz: i64 = (s[S_SPZ] >> 8) + (co*forward - sy*lateral)/4096
2824 if cx-radius < 0 { return 0 - 1 }
2825 if cx+radius >= WX { return 0 - 1 }
2826 if cz-radius < 0 { return 0 - 1 }
2827 if cz+radius >= WZ { return 0 - 1 }
2828 let raw: i64 = wheight(base, cx+s[S_WOX], cz+s[S_WOZ], s[S_SEED])
2829 let ground: i64 = wsp_beach_ocean(wsp(base), cx+s[S_WOX], cz+s[S_WOZ], raw)
2830 if ground <= wsp(base)[P_WATER] { return 0 - 1 }
2831 if ground+height >= WY { return 0 - 1 }
2832 var phase: i64 = 0
2833 var count: i64 = 0
2834 while phase < 2 {
2835 var y: i64 = 1
2836 while y <= height {
2837 var dz: i64 = 0-radius
2838 while dz <= radius {
2839 var dx: i64 = 0-radius
2840 while dx <= radius {
2841 var ax: i64 = dx; if ax < 0 { ax = 0-ax }
2842 var az: i64 = dz; if az < 0 { az = 0-az }
2843 if ax+az <= radius+height-y {
2844 if phase == 0 {
2845 let old: i64 = vget(base, cx+dx, ground+y, cz+dz)
2846 if old != 0 { if old != material { return 0 - 1 } }
2847 count = count+1
2848 } else {
2849 vset(base, cx+dx, ground+y, cz+dz, material)
2850 }
2851 }
2852 dx = dx+1
2853 }
2854 dz = dz+1
2855 }
2856 y = y+1
2857 }
2858 phase = phase+1
2859 }
2860 wc_wmax(base)
2861 return count
2862}
2863
2864func init_impl_v(base: i64, v: i64, seed: i64) -> i64 {
2865 wc_spec(base, v)
2866 // W1c: gen-time recipe overrides -- AFTER identity defaults, BEFORE genworld reads them.
2867 // Allowlist = the gen-time slots only (0..6 terrain shape, 59 treemax, 60 histage, 61
2868 // treespec, 62 settlement density, 63 settlement archetype); style
2869 // slots keep the post-boot poke lane so the two channels never blur. A zero region is a
2870 // clean no-op; the applied count lands in S_GENP below (announce-in-world-truth, sect-30d).
2871 let gp9: *i64 = wgp(base)
2872 let spg9: *i64 = wsp(base)
2873 var gpn9: i64 = 0
2874 if gp9[0] == GENP_MAGIC {
2875 var gk9: i64 = gp9[1]
2876 if gk9 < 0 { gk9 = 0 }
2877 if gk9 > GENP_MAXP { gk9 = GENP_MAXP }
2878 var gi9: i64 = 0
2879 while gi9 < gk9 {
2880 let gx9: i64 = gp9[2 + gi9*2]
2881 // THE ONE ALLOWLIST (nx_genp_allow_lib, 2026-09-04): this chain was hand-enumerated here and mirrored,
2882 // with drift, in nx_world_snap and nx_game_page_emit; all three now read genp_gen_ok, and T90 pins each
2883 // P_* slot to it. Gen-time because these rows shape what genworld is about to read -- poked after boot
2884 // they would be the silent no-op this whitelist exists for.
2885 let gok9: i64 = genp_gen_ok(gx9)
2886 if gok9 == 1 { spg9[gx9] = gp9[3 + gi9*2]; gpn9 = gpn9 + 1 }
2887 gi9 = gi9 + 1
2888 }
2889 }
2890 let s: *i64 = wst(base)
2891 var k: i64 = 0
2892 while k < 64 { s[k] = 0; k = k + 1 }
2893 let ej0: *i64 = ejp(base)
2894 var kj: i64 = 0
2895 while kj < EJRN_SLOTS { ej0[kj] = 0; kj = kj + 1 }
2896 s[S_SEED] = seed
2897 s[S_VAR] = v // after the zero loop -- an earlier set
2898 // here was wiped (the zero-loop-order class)
2899 s[S_GENP] = gpn9 // same zero-loop-order law as S_VAR above
2900 s[S_T] = wsp(base)[P_DAYLEN]/4 // first frame = MID-MORNING light (the
2901 // visitor's first impression; a dawn-dark
2902 // spawn read as night, screenshot-caught)
2903 genworld(base, seed)
2904 wc_wmax(base)
2905 genmobs(base, seed)
2906 // A4/C1: zero the spring + need regions (init may reuse a dirty arena), then seat and seed
2907 let sb0i: *i64 = (base + O_SOFT) as *i64
2908 var kzi: i64 = 0
2909 while kzi < MOB_CAP*SB_PTS*SD_STRIDE { sb0i[kzi] = 0; kzi = kzi + 1 }
2910 let nd0i: *i64 = (base + O_NEED) as *i64
2911 var kni: i64 = 0
2912 while kni < MOB_CAP*4 { nd0i[kni] = 0; kni = kni + 1 }
2913 wc_soft_seat_all(base)
2914 wc_need_seed(base)
2915 wc_mind_zero(base)
2916 // spawn on the TALLEST central column: from a local peak every direction is a vista,
2917 // never a cliff wall filling the first frame (the eyeball found exactly that)
2918 var sx: i64 = WX/2
2919 var sz: i64 = WZ/2
2920 var sh: i64 = 0
2921 var qz: i64 = WZ/2 - 12
2922 while qz < WZ/2 + 12 {
2923 var qx: i64 = WX/2 - 12
2924 while qx < WX/2 + 12 {
2925 let qh: i64 = wheight(base, qx, qz, seed)
2926 if qh > sh { sh = qh; sx = qx; sz = qz }
2927 qx = qx + 1
2928 }
2929 qz = qz + 1
2930 }
2931 // W2b: a spawn column may carry understory at feet height -- clear it. GUARDED so legacy
2932 // (understory-less) worlds stay byte-identical; gen-time vegetation is not journaled, so a
2933 // later window-slide repaint is harmless (the player has long moved).
2934 if ((wsp(base)[P_TREESPEC] >> 18) & 7) > 0 {
2935 vset(base, sx, sh + 1, sz, 0)
2936 vset(base, sx, sh + 2, sz, 0)
2937 }
2938 s[S_CX] = sx*256 + 128
2939 s[S_CZ] = sz*256 + 128
2940 s[S_CY] = (sh+1)*256 + EYE
2941 // Establish support from the same continuous field before querying the bounded floor.
2942 if wsp(base)[P_SURF] == 1 {
2943 let spawn_floor: i64 = wc_surface_source(base, s[S_CX], s[S_CZ])
2944 if spawn_floor >= 0 { s[S_CY] = spawn_floor + EYE }
2945 }
2946 let spawn_stand: i64 = wstand_here(base,s[S_CX],s[S_CZ])
2947 if spawn_stand >= 0 { s[S_CY] = spawn_stand }
2948 s[S_SPX] = s[S_CX]
2949 s[S_SPY] = s[S_CY]
2950 s[S_SPZ] = s[S_CZ]
2951 s[S_YAW] = 0
2952 // GE45 review framing (2026-09-04): an identity with an ocean row spawns FACING the sea. The shore identity's
2953 // +z edge is yaw 0 already, so this is byte-identical there and correct for any other edge a recipe declares.
2954 let sy0: i64 = wsp_sea_yaw(wsp(base))
2955 if sy0 >= 0 { s[S_YAW] = sy0 }
2956 s[S_PITCH] = 0
2957 s[S_Q] = Q_START
2958 if v == BEACH_RELEASE_WORLD {
2959 let release_cells: i64 = wc_spawn_bush(base, BEACH_RELEASE_FORWARD, BEACH_RELEASE_LATERAL, BEACH_RELEASE_RADIUS, BEACH_RELEASE_HEIGHT, BEACH_RELEASE_MATERIAL)
2960 // The release fixture is non-critical: a crowded or submerged site must not
2961 // prevent the world's input bindings and remaining startup from completing.
2962 // The fixture uses the world's foliage material; it must not recolor every leaf.
2963
2964 }
2965 ia_init(winp(base))
2966 ia_bind(winp(base), 82, IA_LUP) // R = look up (real action bits since seq1136)
2967 ia_bind(winp(base), 70, IA_LDOWN) // F = look down (G = party invite, below)
2968 ia_bind(winp(base), 32, IA_JUMP) // space = jump (touch center zone jumps too)
2969 ia_bind(winp(base), 81, IA_MOD) // Q = cycle the hotbar selection
2970 ia_bind(winp(base), 72, IA_HOME) // H = return to spawn (edge-fall rescue)
2971 return 0
2972}
2973func init_impl(base: i64, seed: i64) -> i64 { return init_impl_v(base, 0, seed) }
2974
2975// return to spawn: position + velocity reset, world untouched (the operator's reset button)
2976func wc_respawn(base: i64) -> i64 {
2977 let s: *i64 = wst(base)
2978 s[S_CX] = s[S_SPX]
2979 s[S_CY] = s[S_SPY]
2980 s[S_CZ] = s[S_SPZ]
2981 s[S_VY] = 0
2982 s[S_GROUNDED] = 1
2983 return 0
2984}
2985
2986// highest solid y at a column (collision floor), -1 if none
2987func wground(base: i64, x: i64, z: i64) -> i64 {
2988 var y: i64 = WY - 1
2989 while y >= 0 {
2990 if vsolid(base, x, y, z) == 1 { return y }
2991 y = y - 1
2992 }
2993 return 0 - 1
2994}
2995
2996// Collision uses the same continuous terrain field as rendering; non-terrain solids remain cells.
2997func wc_contact_floor_below_q(base: i64, xq: i64, zq: i64, top: i64, ceiling: i64) -> i64 {
2998 let sp: *i64 = wsp(base)
2999 var y: i64 = top
3000 if y >= WY { y = WY - 1 }
3001 var floor: i64 = 0 - 1
3002 if sp[P_SURF] == 1 {
3003 floor = wc_surface_source(base,xq,zq)
3004 if floor < 0 { return 0 - 1 }
3005 // A heightfield has no underside: a body below the field is inside the ground, so the field bounds
3006 // support from below at ANY ceiling (2026-09-11 rank 4). Discarding it above the ceiling let
3007 // wstand_here and wc_player_support return -1 for feet 1 Q8 under the sand, and gravity then carried
3008 // the body down through the terrain until the void rescue. Wall refusal is unchanged: wstand and the
3009 // step branch still compare the rise against their own allowance.
3010 }
3011 while y >= 0 {
3012 let b: i64 = vget(base,xq >> 8,y,zq >> 8)
3013 var eligible: i64 = vsolid(base,xq >> 8,y,zq >> 8)
3014 if sp[P_SURF] == 1 { if wterrain(b) == 1 { eligible = 0 } }
3015 if eligible == 1 {
3016 let celltop: i64 = (y+1)*256
3017 if celltop <= ceiling {
3018 if celltop > floor { floor = celltop }
3019 return floor
3020 }
3021 }
3022 y = y - 1
3023 }
3024 return floor
3025}
3026
3027// Unbounded column query remains available to existing callers.
3028func wc_contact_floor_q(base: i64, xq: i64, zq: i64, top: i64) -> i64 {
3029 return wc_contact_floor_below_q(base,xq,zq,top,WY*256)
3030}
3031
3032// THE ONE PLACEMENT FLOOR (2026-09-11 beach contact lane), shared by spawn, respawn, the window-shift
3033// re-seat, genmobs, the passport and summon. On the field it is the lowest feet height at or above the
3034// terrain field whose WC_BODY_CELLS body cells hold no structure: scanning DOWN FROM THE SKY put arrivals
3035// on canopy and bush tops, where they floated and then fell when they walked off (rank 6), and a bare
3036// field query could put a body inside a bush. Voxel identities keep the incumbent column scan.
3037// -1 = outside the field.
3038// THE CONTACT INVARIANT for an actor who already stands somewhere (a window shift): the lowest height
3039// her feet may occupy at her column. On the field it is the shared placement floor; on voxel terrain it
3040// is the solid at or under her feet cell, the query mob_tick already uses.
3041
3042// try to stand at (nxq, nzq): returns the required cam y (Q8) or -1 if the move is blocked
3043import "nx_craft_placement_floor_t316.nx"
3044
3045func wstand(base: i64, nxq: i64, nzq: i64, cyq: i64) -> i64 {
3046 // Preserve the existing step allowance; overhead surfaces outside it cannot be support.
3047 let step_allowance: i64 = 384
3048 let floor: i64 = wc_contact_floor_below_q(base, nxq, nzq, WY - 1, cyq - EYE + step_allowance)
3049 var stand: i64 = floor + EYE
3050 let wl2: i64 = wsp(base)[P_WATER]
3051 let wsurf: i64 = (wl2 + 1)*256 + EYE - 96 // float slightly sunk in water
3052 if stand < wsurf { if vget(base, nxq >> 8, wl2, nzq >> 8) == 4 { stand = wsurf } }
3053 // VOID COLUMN = WALL: no ground below means off the world's edge -- refuse the step (the
3054 // walk-off-and-vanish bug: wstand happily computed a hover height over nothing)
3055 if floor < 0 { return 0 - 1 }
3056 if stand - cyq > step_allowance { return 0 - 1 } // more than a 1.5-block rise = wall
3057 let heady: i64 = (stand + 128) >> 8
3058 if vsolid(base, nxq >> 8, heady, nzq >> 8) == 1 { return 0 - 1 }
3059 return stand
3060}
3061
3062// stand height for the CURRENT column (no wall refusal -- the vertical-physics target)
3063func wstand_here(base: i64, xq: i64, zq: i64) -> i64 {
3064 let floor: i64 = wc_contact_floor_below_q(base, xq, zq, WY - 1, wst(base)[S_CY] - EYE)
3065 if floor < 0 { return 0 - 1 }
3066 var stand: i64 = floor + EYE
3067 let wl3: i64 = wsp(base)[P_WATER]
3068 let wsurf: i64 = (wl3 + 1)*256 + EYE - 96
3069 if stand < wsurf { if vget(base, xq >> 8, wl3, zq >> 8) == 4 { stand = wsurf } }
3070 return stand
3071}
3072
3073// mob floor: first solid scanning DOWN from just above the mob's feet -- wground scans from the
3074// SKY and reads an overhanging leaf canopy as "ground 5 blocks up", which froze every mob under a
3075// tree (measured: phase advanced 982/tick = the refusal branch, position never moved).
3076// body clearance: a girl is ~2 blocks tall -- the two cells above the ground must be AIR or
3077// she stands with her head/shoulders inside an overhang (invisible as SDF; as a MESH her
3078// buried parts discard and the poking limbs read as floating shards -- operator-reported).
3079// GE12b -- BODY CLEARANCE. mob_fits (below) proves only her OWN cell's air column, but a girl
3080// is a CYLINDER of radius MOB_R_Q8, so standing near a cell edge her body overlaps the
3081// neighbouring solid: the operator's 2026-08-27 frame caught exactly that -- a girl leaning
3082// THROUGH a cliff wall with her shins inside the blocks. These clamp her fractional position
3083// away from any solid neighbour at either body course. Integer, deterministic, and a pure
3084// no-op in open ground (no solid neighbour => the position is returned untouched).
3085// RADIUS IS NOT A NEW NUMBER: npc_pick already models her body as r=.35 blocks for hit
3086// detection, and .35*256 = 89.6 -> 90 q8. One body, one radius; a second value here would be
3087// two rulers for one girl (she could be hittable where she is not present, and vice versa).
3088const MOB_R_Q8: i64 = 90
3089func mob_solid2(base: i64, x: i64, g: i64, z: i64) -> i64 {
3090 if vsolid(base, x, g + 1, z) == 1 { return 1 }
3091 if vsolid(base, x, g + 2, z) == 1 { return 1 }
3092 return 0
3093}
3094func mob_clear_x(base: i64, nx: i64, nz: i64, g: i64) -> i64 {
3095 let cx: i64 = nx >> 8
3096 let cz: i64 = nz >> 8
3097 let fr: i64 = nx - cx*256
3098 var r: i64 = nx
3099 if fr < MOB_R_Q8 { if mob_solid2(base, cx - 1, g, cz) == 1 { r = cx*256 + MOB_R_Q8 } }
3100 if fr > 256 - MOB_R_Q8 { if mob_solid2(base, cx + 1, g, cz) == 1 { r = cx*256 + 256 - MOB_R_Q8 } }
3101 return r
3102}
3103func mob_clear_z(base: i64, nx: i64, nz: i64, g: i64) -> i64 {
3104 let cx: i64 = nx >> 8
3105 let cz: i64 = nz >> 8
3106 let fr: i64 = nz - cz*256
3107 var r: i64 = nz
3108 if fr < MOB_R_Q8 { if mob_solid2(base, cx, g, cz - 1) == 1 { r = cz*256 + MOB_R_Q8 } }
3109 if fr > 256 - MOB_R_Q8 { if mob_solid2(base, cx, g, cz + 1) == 1 { r = cz*256 + 256 - MOB_R_Q8 } }
3110 return r
3111}
3112func mob_fits(base: i64, x: i64, g: i64, z: i64) -> i64 {
3113 if vsolid(base, x, g + 1, z) == 1 { return 0 }
3114 if vsolid(base, x, g + 2, z) == 1 { return 0 }
3115 return 1
3116}
3117
3118func mob_ground(base: i64, x: i64, ytop: i64, z: i64) -> i64 {
3119 var y: i64 = ytop
3120 if y > WY - 1 { y = WY - 1 }
3121 while y >= 0 {
3122 if vsolid(base, x, y, z) == 1 { return y }
3123 y = y - 1
3124 }
3125 return 0 - 1
3126}
3127
3128// GE12 -- GAIT-PHASED VERTICAL LOCOMOTION (gameengine rung mob_step_gait). A mob's Y no longer
3129// EASES linearly toward the stand height (the 64 q8/tick glide the operator caught 2026-08-26:
3130// a climb glided and a drop floated). Two named regimes, one ruler each:
3131// STEP UP -> the cited stair-ascent rate WC_STEP_EASE_UP (gamefeel row step_ease_up_q8), and
3132// only in a tick where a stride step landed -- the caller is the move branch, so the
3133// rise is gait-phased BY CONSTRUCTION, never a free-running ramp;
3134// DROP -> the PLAYER'S OWN integrator (v -= GRAV per tick, clamped at VTERM, landing snaps to
3135// the stand height and zeroes v): every falling body in the world obeys one gravity.
3136// vyp[k] is her vertical velocity (O_MOBVY). Returns the new Y (q8). All inputs are arena state,
3137// so replay stays bit-identical (T4/T17). ph/gait are untouched: this is Y only.
3138func mob_step_gait(vyp: *i64, k: i64, cy0: i64, ng: i64) -> i64 {
3139 var vy9: i64 = vyp[k]
3140 var ny9: i64 = cy0
3141 if ng > cy0 {
3142 ny9 = cy0 + WC_STEP_EASE_UP
3143 if ny9 > ng { ny9 = ng }
3144 vy9 = 0
3145 }
3146 if ng < cy0 {
3147 vy9 = vy9 - GRAV
3148 if vy9 < 0 - VTERM { vy9 = 0 - VTERM }
3149 ny9 = cy0 + vy9
3150 if ny9 <= ng { ny9 = ng; vy9 = 0 }
3151 }
3152 if ng == cy0 { vy9 = 0 }
3153 vyp[k] = vy9
3154 return ny9
3155}
3156
3157// NPC HIT DETECTION: march the view ray in half-block samples up to 7 blocks; a solid voxel
3158// blocks it (walls occlude, real detection); a sample inside a girl's body cylinder (r=.35,
3159// h=1.7) targets her. Returns the dense index or -1. The same pass PUSHES the player out of
3160// bodies (they have PRESENCE now -- no more walking through people).
3161func npc_pick(base: i64, fx: i64, fy: i64, fz: i64) -> i64 {
3162 let s: *i64 = wst(base)
3163 let m: *i64 = mobp(base)
3164 var t: i64 = 1
3165 while t <= 14 {
3166 let px2: i64 = s[S_CX] + fx*t*128/WATER_MAGIC_4096
3167 let py2: i64 = s[S_CY] + fy*t*128/WATER_MAGIC_4096
3168 let pz2: i64 = s[S_CZ] + fz*t*128/WATER_MAGIC_4096
3169 if vsolid(base, px2 >> 8, py2 >> 8, pz2 >> 8) == 1 { return 0 - 1 }
3170 var k: i64 = 0
3171 while k < en_count(m) {
3172 let h: i64 = en_nth(m, k)
3173 var ddx: i64 = px2 - en_get(m, h, MC_X)
3174 if ddx < 0 { ddx = 0 - ddx }
3175 var ddz: i64 = pz2 - en_get(m, h, MC_Z)
3176 if ddz < 0 { ddz = 0 - ddz }
3177 let dy2: i64 = py2 - en_get(m, h, MC_Y)
3178 if ddx < 90 { if ddz < 90 { if dy2 >= 0 { if dy2 < 440 { return k } } } }
3179 k = k + 1
3180 }
3181 t = t + 1
3182 }
3183 return 0 - 1
3184}
3185
3186// ---------- A1: the integer tick calendar (day/night + 4 seasons) ----------
3187// Pure functions of (S_T, spec) -> bit-exact across arenas by construction. Every phase compare
3188// CROSS-MULTIPLIES (the banked integer-truncation law: never divide a value before comparing it).
3189// RECOMBINATION CONTRACT: a different game = a different spec; a recombined identity turns a
3190// subsystem OFF by zeroing its rows, so every consumer guards the zero (endless day, no rain,
3191// no farm clock) instead of trapping on a modulo-by-zero. Off is a state, never a crash.
3192func cal_dayt(base: i64) -> i64 {
3193 let dl: i64 = wsp(base)[P_DAYLEN]
3194 if dl <= 0 { return 0 }
3195 let s: *i64 = wst(base)
3196 return s[S_T] % dl
3197}
3198func cal_day(base: i64) -> i64 {
3199 let dl: i64 = wsp(base)[P_DAYLEN]
3200 if dl <= 0 { return 0 }
3201 let s: *i64 = wst(base)
3202 return s[S_T] / dl
3203}
3204func cal_season(base: i64) -> i64 {
3205 let sd: i64 = wsp(base)[P_SEASD]
3206 if sd <= 0 { return 0 }
3207 return (cal_day(base) / sd) % 4
3208}
3209// night = the last 3/8 of each day: dayt*8 >= DAYLEN*5, cross-multiplied
3210func cal_night(base: i64) -> i64 {
3211 if wsp(base)[P_DAYLEN] <= 0 { return 0 }
3212 if cal_dayt(base)*8 >= wsp(base)[P_DAYLEN]*WC_NIGHT_X8 { return 1 }
3213 return 0
3214}
3215// sun elevation as a Q12 sine: rises 0 at dawn, +4096 at noon, negative through the night
3216func cal_sunel(base: i64) -> i64 {
3217 let dl: i64 = wsp(base)[P_DAYLEN]
3218 if dl <= 0 { return 4096 } // calendar off = eternal noon
3219 let dt2: i64 = cal_dayt(base)
3220 if dt2*8 < dl*WC_NIGHT_X8 { return it_sin4096(dt2*8*IT_PI/(dl*WC_NIGHT_X8)) }
3221 return 0 - it_sin4096((dt2*8 - dl*WC_NIGHT_X8)*IT_PI/(dl*(8 - WC_NIGHT_X8)))
3222}
3223// deterministic weather: ONE roll per absolute day-eighth from (seed, segment, season table) --
3224// the same world replays the same storms forever
3225func cal_rain(base: i64) -> i64 {
3226 let dl: i64 = wsp(base)[P_DAYLEN]
3227 if dl <= 0 { return 0 }
3228 let s: *i64 = wst(base)
3229 let seg: i64 = s[S_T]*8/dl
3230 // DELEGATED (2026-08-26) to nx_weather_lib's gate-proven wx_rain: same seed lineage (the
3231 // +3300 salt fold), same one-roll-per-absolute-day-eighth semantics (seg IS the eighth), and
3232 // the gate PROVES the long-run rate stays inside each P_RAINS row's binomial envelope -- this
3233 // delegation cannot change any world's climate, and it gains the front persistence, typed
3234 // precipitation and gradient wind the old coin structurally lacked.
3235 return wx_rain(s[S_SEED] + 3300, seg, wsp(base)[P_RAINS + cal_season(base)])
3236}
3237
3238// the per-tick weather export writer: recomputes the eighth's state (pure fns -- cheap, replay
3239// exact) and publishes it in the spec block for the page and every other consumer.
3240func wc_weather_tick(base: i64) -> i64 {
3241 let dl: i64 = wsp(base)[P_DAYLEN]
3242 if dl <= 0 { return 0 }
3243 let s: *i64 = wst(base)
3244 let seg: i64 = s[S_T]*8/dl
3245 let sd: i64 = s[S_SEED] + 3300
3246 let row: i64 = wsp(base)[P_RAINS + cal_season(base)]
3247 let sp: *i64 = wsp(base)
3248 sp[P_WXCOV] = wx_coverage(sd, seg, row)
3249 let ws: i64 = wx_wind_speed(sd, seg)
3250 let wd: i64 = wx_wind_dir_q(sd, seg)
3251 // direction Q -> components via the sim's own it_cos4096/it_sin4096 (angle = wd scaled to tau)
3252 sp[P_WXWINDX] = ws*it_cos4096(wd*IT_PI*2/WX_Q)/4096
3253 sp[P_WXWINDZ] = ws*it_sin4096(wd*IT_PI*2/WX_Q)/4096
3254 sp[P_WXTYPE] = wx_precip(sd, seg, row, cal_season(base), cal_night(base))
3255 sp[P_WXTEMP] = wx_temp(cal_season(base), cal_night(base), sd, seg)
3256 return 0
3257}
3258// write bst into MC_DISG bits 3-5 WITHOUT touching the disguise/met bits (0-2) or the
3259// FRIENDSHIP byte (bits 6-13) -- the old (dg & 7) mask silently erased any upper state
3260func dg_bst(dg: i64, b: i64) -> i64 { return dg - ((dg >> 3) & 7)*8 + b*8 }
3261
3262// ---------- B1/B2: soil + crops. THE EDIT JOURNAL IS THE SPARSE ACTIVE LIST ----------
3263// Every farm cell was player-touched, so it is already journaled at absolute coords: no scan,
3264// no extra memory, and growth writes go through the same journal so world and history can
3265// never disagree. Growth is Minecraft's integer stencil: p = 1/(floor(25/speed)+1), speed
3266// from soil wetness; rolls are seed+coord+epoch hashes -> replay-safe by construction.
3267func wc_grow_set(base: i64, lx: i64, ly: i64, lz: i64, b: i64) -> i64 {
3268 let s: *i64 = wst(base)
3269 if ej_put(base, lx + s[S_WOX], ly, lz + s[S_WOZ], b) < 0 {
3270 s[S_EJDROP] = s[S_EJDROP] + 1
3271 return 0
3272 }
3273 return vset(base, lx, ly, lz, b)
3274}
3275// water within the 5x5 ring at soil level or one below (ponds sit lower than their fields)
3276func wc_wet_near(base: i64, lx: i64, ly: i64, lz: i64) -> i64 {
3277 var dz2: i64 = 0 - 2
3278 while dz2 <= 2 {
3279 var dx2: i64 = 0 - 2
3280 while dx2 <= 2 {
3281 if vget(base, lx + dx2, ly, lz + dz2) == 4 { return 1 }
3282 if vget(base, lx + dx2, ly - 1, lz + dz2) == 4 { return 1 }
3283 dx2 = dx2 + 1
3284 }
3285 dz2 = dz2 + 1
3286 }
3287 return 0
3288}
3289func wc_farm_tick(base: i64) -> i64 {
3290 let s: *i64 = wst(base)
3291 let e: *i64 = ejp(base)
3292 let sp: *i64 = wsp(base)
3293 let rain: i64 = cal_rain(base)
3294 var i: i64 = 0
3295 while i < EJRN_SLOTS {
3296 let cur: i64 = e[i]
3297 if cur != 0 {
3298 let b: i64 = cur & 255
3299 if b >= B_FARM { if b <= B_FARMW {
3300 let k: i64 = (cur >> 8) - 1
3301 let ay: i64 = k & 63
3302 let az: i64 = ((k >> 6) & WATER_MAGIC_33554431) - WATER_MAGIC_16777216
3303 let ax: i64 = ((k >> 31) & WATER_MAGIC_33554431) - WATER_MAGIC_16777216
3304 let lx: i64 = ax - s[S_WOX]
3305 let lz: i64 = az - s[S_WOZ]
3306 // only cells inside the window tick (offscreen farms pause -- chunk law, honest)
3307 if vin(lx, ay, lz) == 1 { if vget(base, lx, ay, lz) == b {
3308 if b == B_FARM { if rain == 1 { wc_grow_set(base, lx, ay, lz, B_FARMW) } }
3309 if b == B_FARM { if rain == 0 { if wc_wet_near(base, lx, ay, lz) == 1 {
3310 wc_grow_set(base, lx, ay, lz, B_FARMW)
3311 } } }
3312 if b == B_FARMW { if rain == 0 { if wc_wet_near(base, lx, ay, lz) == 0 {
3313 wc_grow_set(base, lx, ay, lz, B_FARM)
3314 } } }
3315 if b >= B_CROP0 { if b <= B_CROP1 {
3316 var spd: i64 = sp[P_GROWD]
3317 let un: i64 = vget(base, lx, ay - 1, lz)
3318 if un == B_FARMW { spd = sp[P_GROWW] }
3319 if rain == 1 { if un == B_FARM { spd = sp[P_GROWW] } }
3320 if spd < 1 { spd = 1 }
3321 let den: i64 = 25/spd + 1
3322 if whash(ax*131 + ay, az*97, s[S_SEED] + s[S_T]/sp[P_GROWE]) % den == 0 {
3323 wc_grow_set(base, lx, ay, lz, b + 1)
3324 if b + 1 == B_CROP2 { s[S_GROWN] = s[S_GROWN] + 1 }
3325 }
3326 } }
3327 } }
3328 } }
3329 }
3330 i = i + 1
3331 }
3332 return 0
3333}
3334
3335// ---------- A4/C1 shared state maintenance (springs + needs) ----------
3336// GAIT DRIVE IS STILL A FREE-RUNNING CLOCK (debt 1785770635 STAYS OPEN) -- and the reason is now
3337// MEASURED rather than guessed, because the obvious fix was tried on 2026-08-25 and REFUTED by
3338// nx_wasm_craft_gate T36 before it could ship. Advancing MC_PH by distance travelled makes the
3339// tissue drive track her real cadence, which is correct and is what the oracle band wants. It is
3340// ALSO CIRCULAR: line ~1849 derives her wander heading FROM ph (dx = sin(ph*3), dz = cos(ph*3)),
3341// so a girl who stops moving freezes her phase, and a frozen phase freezes her heading -- she can
3342// never restart. The gate caught it exactly: the bold girl's approach distance stayed at her START
3343// value (1024, was 577) and the run went 52/53 RED. THE REAL FIX IS TO SPLIT THE TWO PHASES: a
3344// wander phase that must free-run for behaviour, and a gait phase that must track travel for
3345// tissue. That needs one word of per-mob state (accumulated stride distance), which touches the
3346// entity schema and therefore the save-format teeth (T15, T18, T50) -- a deliberate change, not a
3347// drive-by. Reverted here so the tree stays GREEN; the diagnosis is the deliverable.
3348func wc_soft_seat_all(base: i64) -> i64 {
3349 let m: *i64 = mobp(base)
3350 let sb0: *i64 = (base + O_SOFT) as *i64
3351 var k: i64 = 0
3352 while k < en_count(m) {
3353 let h: i64 = en_nth(m, k)
3354 if h > 0 { sb_seat_mob(sb0, k, en_get(m, h, MC_X)/4, en_get(m, h, MC_Y)/4, en_get(m, h, MC_Z)/4) }
3355 k = k + 1
3356 }
3357 return 0
3358}
3359// ---------- THE TRAVELER'S PASSPORT (isekai): character + party cross worlds ----------
3360func passp(base: i64) -> *i64 { return (base + O_PASS) as *i64 }
3361func wc_pass_ck(p: *i64) -> i64 {
3362 return gsc_fold_words(SAVE_CK_SEED, p, 0, 21, SAVE_CK_PRIME, SAVE_CK_MASK)
3363}
3364func wc_party_count(base: i64) -> i64 {
3365 let m: *i64 = mobp(base)
3366 var n: i64 = 0
3367 var k: i64 = 0
3368 while k < en_count(m) {
3369 let h: i64 = en_nth(m, k)
3370 if h > 0 { if (en_get(m, h, MC_DISG) & 4) == 4 { n = n + 1 } }
3371 k = k + 1
3372 }
3373 return n
3374}
3375// fold the session's deltas into the lifetime ledger (snapshot words 32+ make this idempotent:
3376// a world reload or a second build never double-counts a deed)
3377func wc_pass_sync(base: i64) -> i64 {
3378 let p: *i64 = passp(base)
3379 let s: *i64 = wst(base)
3380 if p[0] != PASS_MAGIC {
3381 var z: i64 = 0
3382 while z < 48 { p[z] = 0; z = z + 1 }
3383 p[0] = PASS_MAGIC
3384 p[1] = 1
3385 p[2] = whash(s[S_SEED], s[S_T], 20260802)
3386 // snapshot stays ZERO on creation: a traveler born mid-world ABSORBS what he has
3387 // already done here as his first deeds. Baselining at current values silently
3388 // discarded them (gate T50 caught exactly that: 7 harvests -> ledger 0).
3389 }
3390 var d: i64 = s[S_BROKEN] - p[32]
3391 if d > 0 { p[3] = p[3] + d }
3392 p[32] = s[S_BROKEN]
3393 d = s[S_PLACED] - p[33]
3394 if d > 0 { p[4] = p[4] + d }
3395 p[33] = s[S_PLACED]
3396 d = s[S_HARV] - p[34]
3397 if d > 0 { p[5] = p[5] + d }
3398 p[34] = s[S_HARV]
3399 d = s[S_PLANT] - p[35]
3400 if d > 0 { p[6] = p[6] + d }
3401 p[35] = s[S_PLANT]
3402 d = s[S_FOUND] - p[36]
3403 if d > 0 { p[7] = p[7] + d }
3404 p[36] = s[S_FOUND]
3405 d = s[S_LOST] - p[37]
3406 if d > 0 { p[8] = p[8] + d }
3407 p[37] = s[S_LOST]
3408 d = s[S_T] - p[38]
3409 if d > 0 { p[9] = p[9] + d }
3410 p[38] = s[S_T]
3411 p[10] = p[10] | (1 << s[S_VAR])
3412 // the party rides along: up to 3 companions' (kind, bond-word, genome)
3413 let m: *i64 = mobp(base)
3414 var pc: i64 = 0
3415 var k: i64 = 0
3416 while k < en_count(m) {
3417 let h: i64 = en_nth(m, k)
3418 if h > 0 { if (en_get(m, h, MC_DISG) & 4) == 4 { if pc < 3 {
3419 p[12 + pc*3] = en_get(m, h, MC_KIND)
3420 p[13 + pc*3] = en_get(m, h, MC_DISG)
3421 p[14 + pc*3] = en_get(m, h, MC_GENE)
3422 pc = pc + 1
3423 } } }
3424 k = k + 1
3425 }
3426 p[11] = pc
3427 p[21] = wc_pass_ck(p)
3428 return PASS_LEN
3429}
3430// arriving traveler: validate, re-baseline the snapshot, and WALK THE PARTY OFF THE BOAT --
3431// each companion respawns beside the player with bond and genome intact. Refusal touches
3432// nothing: -1 magic, -2 version, -3 checksum (the save doors' law).
3433func wc_pass_apply(base: i64) -> i64 {
3434 let p: *i64 = passp(base)
3435 if p[0] != PASS_MAGIC { return 0 - 1 }
3436 if p[1] != 1 { return 0 - 2 }
3437 if wc_pass_ck(p) != p[21] { return 0 - 3 }
3438 let s: *i64 = wst(base)
3439 p[32] = s[S_BROKEN]
3440 p[33] = s[S_PLACED]
3441 p[34] = s[S_HARV]
3442 p[35] = s[S_PLANT]
3443 p[36] = s[S_FOUND]
3444 p[37] = s[S_LOST]
3445 p[38] = s[S_T]
3446 p[10] = p[10] | (1 << s[S_VAR])
3447 let m: *i64 = mobp(base)
3448 var pc: i64 = 0
3449 while pc < p[11] { if pc < 3 {
3450 let hn: i64 = en_spawn(m)
3451 if hn > 0 {
3452 let ang: i64 = pc*2*IT_PI/3 + IT_PI/6
3453 var ax: i64 = s[S_CX] + it_sin4096(ang)*3*256/WATER_MAGIC_4096
3454 var az: i64 = s[S_CZ] + it_cos4096(ang)*3*256/WATER_MAGIC_4096
3455 ax = wclamp(ax, 2*256, (WX - 2)*256)
3456 az = wclamp(az, 2*256, (WZ - 2)*256)
3457 let gy: i64 = mob_ground(base, ax >> 8, WY - 1, az >> 8)
3458 en_set(m, hn, MC_X, ax)
3459 en_set(m, hn, MC_Z, az)
3460 en_set(m, hn, MC_Y, wc_contact_floor_q(base,ax,az,WY-1))
3461 en_set(m, hn, MC_KIND, p[12 + pc*3])
3462 en_set(m, hn, MC_DISG, p[13 + pc*3])
3463 en_set(m, hn, MC_GENE, p[14 + pc*3])
3464 en_set(m, hn, MC_PH, whash(p[14 + pc*3], pc, s[S_SEED]) % WATER_MAGIC_4096)
3465 }
3466 pc = pc + 1
3467 } }
3468 wc_soft_seat_all(base)
3469 wc_need_seed(base)
3470 p[21] = wc_pass_ck(p)
3471 return 0
3472}
3473
3474// level + party-invite as BASE-PARAMETERIZED cores (the doors below are thin wrappers, so the
3475// gate exercises the same code the game runs -- one definition, zero drift)
3476func pass_level_of(base: i64) -> i64 {
3477 let p: *i64 = passp(base)
3478 if p[0] != PASS_MAGIC { return 1 }
3479 var sc: i64 = p[5]*4 + p[6] + p[7]*20 + p[3]/8 + p[4]/8 + p[9]/72000*3
3480 var lv: i64 = 1
3481 while sc >= lv*10 { sc = sc - lv*10; lv = lv + 1 }
3482 return lv
3483}
3484func party_of(base: i64) -> i64 {
3485 let s: *i64 = wst(base)
3486 if s[S_NPCT] < 0 { return 0 - 1 }
3487 let m: *i64 = mobp(base)
3488 let h: i64 = en_nth(m, s[S_NPCT])
3489 if h <= 0 { return 0 - 1 }
3490 let dg: i64 = en_get(m, h, MC_DISG)
3491 if ((dg >> 6) & 255) < 40 { return 0 - 2 } // a bond, not a kidnapping
3492 if (dg & 4) == 4 {
3493 en_set(m, h, MC_DISG, dg - 4) // toggle: she may also LEAVE
3494 return 0
3495 }
3496 if wc_party_count(base) >= 3 { return 0 - 3 }
3497 en_set(m, h, MC_DISG, dg | 4)
3498 th_add(base, s[S_NPCT], TH_MET, 20, 14400)
3499 return 1
3500}
3501
3502// outfit for girl k: identity data gates the dimension; her genome picks within it.
3503// 0 clothed · 1 topless · 2 nude (all figures are the one adult mesh)
3504// THE POSE DOOR (operator 2026-08-02: "interact with me and the environment in various poses
3505// beyond the one" -- the pose PIPELINE's first rung). The engine ALREADY computes behavioral
3506// states (T44: sleep/flee via MC_DISG bits 3-5; movement via O_MOBAUX deltas) and the renderer
3507// ignores every one of them: sleeping girls play the walk clip, idle girls walk in place. Same
3508// class as the face: THE DATA EXISTS AND DRIVES NOTHING -- so the consumer contract comes first.
3509// Pose ids (the page consumes; the coming NXA pose BANK indexes by these):
3510// 0 idle-stand (breath only) 1 walk 2 sleep-lying 3 flee-run 4 sit 5 lie-awake
3511// 4/5 are RESERVED rows: behaviors from the towel/smart-object chain select them; publishing
3512// the id space now means new poses arrive as DATA against a stable contract, not an engine edit.
3513func mob_pose(base: i64, k: i64) -> i64 {
3514 let m: *i64 = mobp(base)
3515 let st: i64 = (en_get(m, en_nth(m, k), MC_DISG) >> 3) & 7
3516 if st == 2 { return 2 }
3517 if st == 4 { return 3 }
3518 if mob_spd_q8i(base, k) > 0 { return 1 }
3519 return 0
3520}
3521func mobpose(k: i64) -> i64 { return mob_pose(0, k) }
3522
3523// GE13b THE SELECTOR: what a girl wears, from the world's outfit mode, her genome and her pose.
3524// Returns the OUTFIT word: upper garment id << GAR_SLOT_SH | lower garment id, 0 = nothing in that
3525// slot; one-piece and dresses cover both and ride the LOWER slot. Every branch is a table LOOKUP --
3526// no colour, no shape, no category is decided here; a world that rewrites a garment row rewrites
3527// what these ids mean, and a row the world does not carry (0) is not wearable.
3528// mode 0 (identity keeps everyone clothed): CASUAL/EVENING by the beach bits 18-19 -- tee+shorts,
3529// tee+skirt, sundress, evening dress. Before this every girl wore the one dress.
3530// mode 1 (MIXED beach): the incumbent bits, garment by garment -- 0 bikini top+bottom, 1 one-piece,
3531// 2 bikini bottom only (topless), 3 nothing (nude). Girl-for-girl the SAME 0/1/2 the old rule
3532// produced; gate T85 proves it against mob_outfit_v1 below.
3533// mode 2 (SWIMWEAR-ONLY): bit 18 picks bikini or one-piece; never a cover-up, never casual.
3534// mode 3 (NUDE BEACH): nothing worn.
3535// POSE OVERLAY: asleep (mob_pose SLEEP) on a beach with swim bottoms on, she wraps a SARONG
3536// (beach-cover) over them -- same coverage bit, so her legacy value never flickers -- unless
3537// she is in water, where a wrap is never worn (swim => swim).
3538func wc_mob_in_water(base: i64, k: i64) -> i64 {
3539 let m: *i64 = mobp(base)
3540 let h: i64 = en_nth(m, k)
3541 if vget(base, en_get(m, h, MC_X) >> 8, en_get(m, h, MC_Y) >> 8, en_get(m, h, MC_Z) >> 8) == B_WATER { return 1 }
3542 return 0
3543}
3544func wc_outfit(base: i64, k: i64) -> i64 {
3545 let md: i64 = wsp(base)[P_OUTFIT]
3546 let m: *i64 = mobp(base)
3547 let gb: i64 = (en_get(m, en_nth(m, k), MC_GENE) >> MG_BEACH_SH) & MG_BEACH_MASK
3548 var up: i64 = 0
3549 var lo: i64 = 0
3550 var beach: i64 = 0
3551 if md == 0 {
3552 if gb == 0 { up = GAR_TEE; lo = GAR_SHORTS }
3553 if gb == 1 { up = GAR_TEE; lo = GAR_SKIRT }
3554 if gb == 2 { lo = GAR_SUNDRESS }
3555 if gb == 3 { lo = GAR_DRESS }
3556 }
3557 if md == 1 {
3558 beach = 1
3559 if gb == 0 { up = GAR_BIKINI_TOP; lo = GAR_BIKINI_BOT }
3560 if gb == 1 { lo = GAR_ONEPIECE }
3561 if gb == 2 { lo = GAR_BIKINI_BOT }
3562 }
3563 if md == 2 {
3564 beach = 1
3565 if (gb & 1) == 0 { up = GAR_BIKINI_TOP; lo = GAR_BIKINI_BOT }
3566 if (gb & 1) == 1 { lo = GAR_ONEPIECE }
3567 }
3568 if beach == 1 { if lo > 0 { if gar_cat(gar_row(base, lo)) == GAR_CAT_SWIM { if gar_cov(gar_row(base, lo)) == GAR_COV_BOT {
3569 if mob_pose(base, k) == MOB_POSE_SLEEP { if wc_mob_in_water(base, k) == 0 { lo = GAR_SARONG } }
3570 } } } }
3571 // a row the world does not carry is not a garment: the slot empties (the neg-control's lever)
3572 if gar_row(base, up) == 0 { up = 0 }
3573 if gar_row(base, lo) == 0 { lo = 0 }
3574 return (up << GAR_SLOT_SH) | lo
3575}
3576// 0 clothed / 1 topless / 2 nude, DERIVED from the worn set -- the contract every existing consumer
3577// (the page's uOF bands, T49, T77) keeps, now a consequence of the wardrobe instead of the wardrobe.
3578func mob_outfit(base: i64, k: i64) -> i64 {
3579 let o: i64 = wc_outfit(base, k)
3580 return gar_legacy(gar_cov(gar_row(base, o >> GAR_SLOT_SH)) | gar_cov(gar_row(base, o & GAR_ID_MASK)))
3581}
3582// THE PRE-WARDROBE RULE, kept RUNNABLE as the gate's oracle: T85 proves mob_outfit == mob_outfit_v1
3583// for every girl in every mode, so no consumer sees a different girl. Not called by the game.
3584func mob_outfit_v1(base: i64, k: i64) -> i64 {
3585 let md9: i64 = wsp(base)[P_OUTFIT]
3586 if md9 == 0 { return 0 }
3587 // GE13: per-world outfit FLAGS, all data -- 1 = MIXED (genome bits decide; the incumbent
3588 // beach), 2 = SWIMWEAR-ONLY (dimension active, variety off), 3 = NUDE BEACH (all bare).
3589 if md9 == 2 { return 0 }
3590 if md9 == 3 { return 2 }
3591 let m: *i64 = mobp(base)
3592 let g: i64 = (en_get(m, en_nth(m, k), MC_GENE) >> 18) & 3
3593 if g <= 1 { return 0 }
3594 if g == 2 { return 1 }
3595 return 2
3596}
3597
3598func wc_need_seed(base: i64) -> i64 {
3599 let m: *i64 = mobp(base)
3600 let s: *i64 = wst(base)
3601 let nd0: *i64 = (base + O_NEED) as *i64
3602 var k: i64 = 0
3603 while k < en_count(m) {
3604 nd0[k*4] = 300 + (whash(k, 11, s[S_SEED]) % 200)
3605 nd0[k*4 + 1] = 700
3606 nd0[k*4 + 2] = 300 + (whash(k, 23, s[S_SEED]) % 200)
3607 nd0[k*4 + 3] = 0
3608 k = k + 1
3609 }
3610 return 0
3611}
3612
3613// ---------- C3/C5: the inner life (thought ledger + gossip records) ----------
3614func mindp(base: i64) -> *i64 { return (base + O_MIND) as *i64 }
3615func wc_mind_zero(base: i64) -> i64 {
3616 let mp: *i64 = mindp(base)
3617 var i: i64 = 0
3618 while i < MOB_CAP*24 { mp[i] = 0; i = i + 1 }
3619 return 0
3620}
3621// add/refresh a thought: same id refreshes in place; else a dead slot; else rotate one out
3622func th_add(base: i64, k: i64, id: i64, mag: i64, ttl: i64) -> i64 {
3623 let mp: *i64 = mindp(base)
3624 let s: *i64 = wst(base)
3625 let b: i64 = k*24
3626 var slot: i64 = 0 - 1
3627 var i: i64 = 0
3628 while i < 8 {
3629 if (mp[b + i*2] >> 8) == id { slot = i }
3630 i = i + 1
3631 }
3632 if slot < 0 {
3633 i = 0
3634 while i < 8 {
3635 if slot < 0 { if mp[b + i*2 + 1] <= s[S_T] { slot = i } }
3636 i = i + 1
3637 }
3638 }
3639 if slot < 0 { slot = (s[S_T] + k) % 8 }
3640 mp[b + slot*2] = id*256 + (mag + 128)
3641 mp[b + slot*2 + 1] = s[S_T] + ttl
3642 return 0
3643}
3644// mood = the sum of LIVE thoughts, clamped -- always decomposable back into its reasons
3645func th_mood(base: i64, k: i64) -> i64 {
3646 let mp: *i64 = mindp(base)
3647 let s: *i64 = wst(base)
3648 let b: i64 = k*24
3649 var mo: i64 = 0
3650 var i: i64 = 0
3651 while i < 8 {
3652 if mp[b + i*2] != 0 { if mp[b + i*2 + 1] > s[S_T] { mo = mo + (mp[b + i*2] & 255) - 128 } }
3653 i = i + 1
3654 }
3655 if mo > 100 { mo = 100 }
3656 if mo < 0 - 100 { mo = 0 - 100 }
3657 return mo
3658}
3659// a gossip fact: (subject, predicate, confidence, born). A better-known copy never downgrades.
3660func go_add(base: i64, k: i64, subj: i64, pred: i64, conf: i64) -> i64 {
3661 let mp: *i64 = mindp(base)
3662 let s: *i64 = wst(base)
3663 let b: i64 = k*24 + 16
3664 var slot: i64 = 0 - 1
3665 var free: i64 = 0 - 1
3666 var oldest: i64 = 0
3667 var oldt: i64 = SAVE_CK_MASK
3668 var i: i64 = 0
3669 while i < 4 {
3670 let w: i64 = mp[b + i*2]
3671 if w == 0 { if free < 0 { free = i } }
3672 if w != 0 { if (w >> 16) == subj { if ((w >> 8) & 255) == pred { slot = i } } }
3673 if mp[b + i*2 + 1] < oldt { oldt = mp[b + i*2 + 1]; oldest = i }
3674 i = i + 1
3675 }
3676 if slot >= 0 { if (mp[b + slot*2] & 255) >= conf { return 0 } }
3677 if slot < 0 { slot = free }
3678 if slot < 0 { slot = oldest }
3679 mp[b + slot*2] = subj*WATER_MAGIC_65536 + pred*256 + conf
3680 mp[b + slot*2 + 1] = s[S_T]
3681 return 0
3682}
3683func go_newest(base: i64, k: i64) -> i64 {
3684 let mp: *i64 = mindp(base)
3685 let b: i64 = k*24 + 16
3686 var best: i64 = 0 - 1
3687 var bt: i64 = 0 - 1
3688 var i: i64 = 0
3689 while i < 4 {
3690 if mp[b + i*2] != 0 { if mp[b + i*2 + 1] > bt { bt = mp[b + i*2 + 1]; best = i } }
3691 i = i + 1
3692 }
3693 return best
3694}
3695
3696// ---- GAIT: THE PARAMETRIC DRIVE ----------------------------------------------------------------
3697// decidegrees -> it-units. This is nx_quadruped's qdeg idiom at 10x resolution; that organ's
3698// quad_gait_pose_g is the working precedent in this estate for "a gait is DATA, amplitudes and
3699// per-limb phase offsets are the gait's parameters". It is deliberately NOT imported: it calls
3700// sys_mmap and this engine targets wasm, so the IDIOM is reused and the code is not duplicated.
3701func wc_ddeg(d: i64) -> i64 { return d*IT_PI/WC_DDEG_HALFTURN }
3702// AMPLITUDE from a PUBLISHED RANGE. The halving lives here, once, so no caller can forget it and
3703// no future reader has to work out which of the two a stored constant is.
3704func wc_amp_ddeg(range_ddeg: i64) -> i64 { return wc_ddeg(range_ddeg)/2 }
3705// STRIDE PHASE: one full cycle per WC_STRIDE_Q8 of PATH TRAVELLED. Distance-driven by
3706// construction, which is what makes pelvic rotation phase-locked to stride -- the coupling is
3707// structural, not a tuning. Two consequences fall out for free: a girl who stops has a FROZEN
3708// stride phase, so she stands instead of marching on the spot; and a girl who walks faster takes
3709// the same-length strides more often, so cadence emerges from speed instead of being a constant.
3710// ⚠THIS IS A SECOND, DIFFERENT QUANTITY FROM wc_gait_ang -- NOT A DUPLICATE RULER. wc_gait_ang
3711// drives the THORAX BOB, which is the SECOND HARMONIC of the stride (two steps per cycle, each
3712// with its own vertical rise and fall), and its scale is calibrated against the gait_bob_q8 row.
3713// ★THEIR RATIO IS A CHECKABLE CLAIM AND IT DOES NOT CURRENTLY HOLD. wc_gait_ang implies one bob
3714// per 962 q8 of travel, hence one stride per 1924 q8 = 7.5 m, against the cited 1.46 m -- the
3715// incumbent gait drive is calibrated 5.1x too long, and separately it is calibrated at SPEED (40
3716// q8/tick) which no mob ever reaches: mobs walk at 4-5 q8/tick, so the bob it produces in the
3717// live world is ~0.25 Hz where walking thorax oscillation is ~1.8-2 Hz.
3718// ⛔THAT DISAGREEMENT IS NAMED HERE AND DELIBERATELY NOT FIXED BY EDITING THE SHARED CONSTANT.
3719// wc_gait_ang feeds the soft-body anchor that gate teeth T40 and T54 are calibrated against, and
3720// silently moving a constant another tooth is calibrated on is how a green gate stops meaning
3721// anything. The renderer takes the cited stride; the bob keeps its own calibration; the gap goes
3722// on the board as a measurement with its arithmetic attached rather than into a quiet edit.
3723func wc_stride_ang(g_q8: i64) -> i64 { return g_q8*2*IT_PI/WC_STRIDE_Q8 }
3724// shortest signed representative of an angle difference, in (-IT_PI, IT_PI].
3725func wc_angwrap(d: i64) -> i64 {
3726 var r: i64 = d % (2*IT_PI)
3727 if r > IT_PI { r = r - 2*IT_PI }
3728 if r < 0 - IT_PI { r = r + 2*IT_PI }
3729 return r
3730}
3731// THE HEADING LOW-PASS. This one function is the whole wobble fix AND the fluidity parameter.
3732// WHAT IT REPLACES: nothing. There was no heading state at all -- the body's yaw was the PLAYER'S
3733// camera yaw, so every girl pivoted with the camera while translating along her own path, and the
3734// steering that produced that path is an 8-direction bang-bang controller (dx = +/-4 per axis with
3735// an independent per-axis deadband) whose sign can flip in a single tick and whose diagonal is
3736// 41 percent faster than its axis-aligned step. Facing derived from that signal inherits all of it.
3737// HOW IT STEERS WITHOUT atan2: there is no it_atan2 anywhere in the corpus (proven, corpus_complete
3738// =1), and adding one would be a second trigonometric approximation beside the incumbent. It is not
3739// needed. The CROSS PRODUCT of the current forward with the desired direction is sin(error) scaled
3740// by |desired|, which already carries both the SIGN and, near convergence, the MAGNITUDE of the
3741// error -- so a proportional controller can be built from the sin/cos this engine already has.
3742// cr < 0 / cr > 0 -> which way to turn
3743// dt < 0 -> the target is BEHIND: turn at the full allowance, sign broken deterministically
3744// The step is proportional to sin(error), so it goes to zero AS the error goes to zero: the
3745// approach is asymptotic and cannot overshoot, which is what "fluid" means here as opposed to a
3746// bang-bang controller that snaps (locked) or an unclamped one that rings (floppy).
3747// The allowance is speed-coupled: mx = 0 when she is not moving, so nobody spins on the spot.
3748func wc_hdg_step(hdg: i64, dx: i64, dz: i64) -> i64 {
3749 var ax: i64 = dx
3750 if ax < 0 { ax = 0 - ax }
3751 var az: i64 = dz
3752 if az < 0 { az = 0 - az }
3753 if ax + az == 0 { return hdg } // no intent, no turn: she is standing
3754 let mag: i64 = sd_isqrt(dx*dx + dz*dz)
3755 if mag <= 0 { return hdg }
3756 let fx: i64 = it_sin4096(hdg % (2*IT_PI))
3757 let fz: i64 = it_cos4096(hdg % (2*IT_PI))
3758 // cross and dot of forward (fx4096, unit) with the desired step (q8, magnitude mag)
3759 // ⚠NOT PRE-DIVIDED BY 4096. Dividing here first would floor cr to single digits at a mob's
3760 // 4-7 q8 step and quantise the whole controller into a handful of levels -- which is the
3761 // stutter this function exists to remove, reintroduced inside the fix. Both products stay in
3762 // 4096*q8 units and the one division happens at the end, against mag*4096.
3763 let cr: i64 = fx*dz - fz*dx // 4096 * mag * sin(error)
3764 let dt: i64 = fx*dx + fz*dz // 4096 * mag * cos(error)
3765 // quarter turn per stride, pro-rated by the ground this tick actually covers
3766 let mx: i64 = mag*WC_TURN_PER_STRIDE/WC_STRIDE_Q8
3767 // SIGN, AND IT WAS WRONG FIRST TIME. The (x,z) cross product fx*dz - fz*dx measures rotation
3768 // from +x toward +z, and this engine yaw runs the OTHER way round: forward is (sin yaw,
3769 // cos yaw), so increasing yaw turns from +z toward +x. The cross therefore carries
3770 // -sin(error), not +sin(error), and the correction is its NEGATION.
3771 // Settled against a case with an unambiguous answer rather than by staring at it: facing +z
3772 // (yaw 0) with the target at +x plainly needs yaw to INCREASE, and there the cross comes out
3773 // NEGATIVE -- so the turn is -cr.
3774 // WHAT THE WRONG SIGN DID, because it is not the failure anyone would predict: it does not
3775 // wobble or overshoot, it makes facing-directly-AWAY-from-the-target a stable point, so she
3776 // walks backwards away from where she is going and looks perfectly calm doing it. Gate tooth
3777 // T82 caught it as a 2-cycle that never converged out of a half-turn reversal.
3778 var st: i64 = 0 - mx*cr/(mag*WATER_MAGIC_4096) // = mx*sin(error): proportional, saturating
3779 if dt < 0 { // behind her: no proportional term is valid
3780 st = mx
3781 if cr > 0 { st = 0 - mx }
3782 }
3783 // THE INTEGER TAIL, and it is the FLOPPY failure mode arriving through rounding rather than
3784 // through a bad gain. The proportional term is mx*sin(error), so once sin(error) falls below
3785 // 1/mx it truncates to ZERO and she stops turning while still misaligned -- at the derived
3786 // allowance that floor sits near 0.84 degrees, so she would sit permanently just off her own
3787 // direction of travel and never arrive. Taking ONE UNIT instead is the smallest turn this
3788 // representation can express, so it is the smallest possible repair and needs no constant of
3789 // its own. Both guards require a nonzero cross product, so a girl who IS aligned still turns
3790 // by nothing at all.
3791 // ⚠STATED IMPRECISION: this leaves a one-unit limit cycle about the exact heading, which is
3792 // 0.014 degrees and bounded. It is preferred to the alternative, which is a permanent and
3793 // UNBOUNDED offset -- a bounded jitter below the angular resolution of the rig beats a
3794 // static error you can see.
3795 if st == 0 { if cr > 0 { st = 0 - 1 } }
3796 if st == 0 { if cr < 0 { st = 1 } }
3797 if st > mx { st = mx }
3798 if st < 0 - mx { st = 0 - mx }
3799 var nh: i64 = hdg + st
3800 if nh < 0 { nh = nh + 2*IT_PI }
3801 if nh >= 2*IT_PI { nh = nh - 2*IT_PI }
3802 return nh
3803}
3804func wc_hdg_of(base: i64, k: i64) -> i64 { let hp: *i64 = (base + O_MOBHDG) as *i64; return hp[k] }
3805// the girl's own stride phase, in it-units, from the path length she has actually walked
3806func wc_mob_sph(base: i64, k: i64) -> i64 {
3807 let nd: *i64 = (base + O_NEED) as *i64
3808 return wc_stride_ang(nd[k*4 + WC_NEED_GAIT]) % (2*IT_PI)
3809}
3810// ---- THE POSE, AS FIVE PURE FUNCTIONS OF STRIDE PHASE -------------------------------------------
3811// Extracted out of wc_mob_mesh deliberately: the renderer needs them and the GATE needs them, and a
3812// gate that recomputed these angles from the same formula would be testing a COPY of the mechanism
3813// rather than the mechanism. One definition, two callers, and a tooth that fails when the shipping
3814// code changes. They take only the phase, so they are trivially testable at any phase without a
3815// world, a camera, a rig or a framebuffer.
3816// SIGN CONVENTION, stated once: pelvis LEADS (+), thorax TRAILS (-, applied as a local yaw on the
3817// chest bone whose parent is the pelvis), legs and arms swing in elevation, elbow only flexes.
3818func wc_gp_pelvis(sph: i64) -> i64 { return wc_amp_ddeg(WC_PELVIS_ROT_DDEG)*it_sin4096(sph % (2*IT_PI))/WATER_MAGIC_4096 }
3819func wc_gp_thorax(sph: i64) -> i64 { return wc_amp_ddeg(WC_THORAX_ROT_DDEG)*it_sin4096(sph % (2*IT_PI))/WATER_MAGIC_4096 }
3820func wc_gp_leg(sph: i64) -> i64 { return it_sin4096(sph % (2*IT_PI))*(IT_PI/6)/WATER_MAGIC_4096 }
3821func wc_gp_arm(sph: i64) -> i64 { return it_sin4096(sph % (2*IT_PI))*(IT_PI/12)/WATER_MAGIC_4096 }
3822// (1 - cos)/2 scaled by the cited ROM: 0 at phase 0, ROM at the half cycle, never negative, and no
3823// free parameter -- the anatomical floor at zero and the published range fix both ends between them.
3824func wc_gp_elbow(sph: i64) -> i64 { return wc_ddeg(WC_ELBOW_ROM_DDEG)*(WATER_MAGIC_4096 - it_cos4096(sph % (2*IT_PI)))/(2*WATER_MAGIC_4096) }
3825
3826// mob wander: smooth deterministic drift (phase-driven sin/cos), terrain-following, player-curious
3827// within 6 blocks. Pure integer -- the T4 determinism checksum covers mobs by construction.
3828func mob_tick(base: i64) -> i64 {
3829 let m: *i64 = mobp(base)
3830 let s: *i64 = wst(base)
3831 let nd: *i64 = (base + O_NEED) as *i64
3832 let vyp: *i64 = (base + O_MOBVY) as *i64 // GE12 vertical velocity per mob
3833 let night: i64 = cal_night(base)
3834 var k: i64 = 0
3835 while k < en_count(m) {
3836 let h: i64 = en_nth(m, k)
3837 if h > 0 {
3838 var x: i64 = en_get(m, h, MC_X)
3839 var z: i64 = en_get(m, h, MC_Z)
3840 var ph: i64 = en_get(m, h, MC_PH) + 5
3841 // FOOTSTRIKE IMPULSE: bank the pre-move vertical velocity. After the movement code
3842 // below, (vy_pre < 0 && vyp[k] == 0) is precisely "GE12's integrator arrested a
3843 // fall this tick" -- ground contact -- and |vy_pre| IS the ground-reaction delta-v.
3844 let vy_pre: i64 = vyp[k]
3845 // C1 NEEDS drift (integer, staggered by handle -- the village never moves in lockstep)
3846 let nb: i64 = k*4
3847 if (s[S_T] + h) % 8 == 0 {
3848 if nd[nb] < 1000 { nd[nb] = nd[nb] + 2 } // hunger grows
3849 if nd[nb + 2] < 1000 { nd[nb + 2] = nd[nb + 2] + 3 } // loneliness grows
3850 if nd[nb + 1] > 0 { nd[nb + 1] = nd[nb + 1] - 1 } // energy drains
3851 }
3852 // C3: lived moments become LEDGER ENTRIES (staggered; each refreshes in place)
3853 if (s[S_T] + h) % 128 == 0 {
3854 let bst0: i64 = (en_get(m, h, MC_DISG) >> 3) & 7
3855 if cal_rain(base) == 1 { if bst0 != 2 { th_add(base, k, TH_RAIN, 0 - 8, 1200) } }
3856 if nd[nb] > 700 { th_add(base, k, TH_HUNGRY, 0 - 10, 900) }
3857 if night == 1 { if bst0 == 2 { th_add(base, k, TH_SLEPT, 6, 3600) } }
3858 }
3859 // BEHAVIOR LAYER (C1/C2 -- lives picked by NEEDS x the spec ADVERTISEMENT table,
3860 // not a dice roll): state in MC_DISG bits 3-5, repicked on the staggered 240-tick
3861 // clock. 0=WANDER 1=SOCIALIZE 2=REST 3=FORAGE 4=FLEE. At night the village SLEEPS
3862 // (the C2 schedule) -- while the wardens hunt wider. The old spec-weights TODO is
3863 // RESOLVED: behavior now reads needs + P_ADV rows, both data.
3864 let dg: i64 = en_get(m, h, MC_DISG)
3865 var bst: i64 = (dg >> 3) & 7
3866 if (s[S_T] + h*37) % 240 == 0 {
3867 var sc1: i64 = 220 + (whash(h*911, s[S_T]/240, s[S_SEED]) % 64)
3868 // C3 feedback: the ledger BENDS the life -- a glad girl seeks company, a sad
3869 // one withdraws to rest. Mood is data the argmax reads, not a scripted branch.
3870 let mo9: i64 = th_mood(base, k)
3871 var sc2: i64 = nd[nb + 2]
3872 if mo9 > 0 { sc2 = sc2 + mo9 }
3873 var sc3: i64 = 1000 - nd[nb + 1]
3874 if mo9 < 0 { sc3 = sc3 - mo9*2 }
3875 var sc4: i64 = 0
3876 var ai: i64 = 0
3877 while ai < 6 {
3878 let ad: i64 = wsp(base)[P_ADV + ai]
3879 if ad != 0 { if ((ad >> 8) & 255) == 0 {
3880 let ab: i64 = (ad >> 16) & 255
3881 var fnd: i64 = 0
3882 var az2: i64 = (z >> 8) - 3
3883 while az2 <= (z >> 8) + 3 {
3884 var ax2: i64 = (x >> 8) - 3
3885 while ax2 <= (x >> 8) + 3 {
3886 let gy2: i64 = mob_ground(base, ax2, (en_get(m, h, MC_Y) >> 8) + 2, az2)
3887 if gy2 >= 0 {
3888 if vget(base, ax2, gy2, az2) == ab { fnd = 1 }
3889 if vget(base, ax2, gy2 + 1, az2) == ab { fnd = 1 }
3890 }
3891 ax2 = ax2 + 1
3892 }
3893 az2 = az2 + 1
3894 }
3895 if fnd == 1 {
3896 let cand: i64 = nd[nb]*(ad & 255)/8
3897 if cand > sc4 { sc4 = cand }
3898 }
3899 } }
3900 ai = ai + 1
3901 }
3902 bst = 0
3903 var top: i64 = sc1
3904 if sc2 > top { top = sc2; bst = 1 }
3905 if sc3 > top { top = sc3; bst = 2 }
3906 if sc4 > top { top = sc4; bst = 3 }
3907 if night == 1 { bst = 2 }
3908 en_set(m, h, MC_DISG, dg_bst(dg, bst))
3909 }
3910 if (dg & 3) == 3 {
3911 // a hidden human checks for hunters -- night widens the danger radius
3912 var wr: i64 = 8*256
3913 if night == 1 { wr = 12*256 }
3914 var wnd: i64 = wr
3915 var wnx: i64 = 0
3916 var wnz: i64 = 0
3917 var kf: i64 = 0
3918 while kf < en_count(m) {
3919 let hf: i64 = en_nth(m, kf)
3920 if en_get(m, hf, MC_KIND) == 2 { if (en_get(m, hf, MC_DISG) & 1) == 0 {
3921 var fdx: i64 = en_get(m, hf, MC_X) - x
3922 if fdx < 0 { fdx = 0 - fdx }
3923 var fdz: i64 = en_get(m, hf, MC_Z) - z
3924 if fdz < 0 { fdz = 0 - fdz }
3925 if fdx + fdz < wnd { wnd = fdx + fdz; wnx = en_get(m, hf, MC_X); wnz = en_get(m, hf, MC_Z) }
3926 } }
3927 kf = kf + 1
3928 }
3929 if wnd < wr { bst = 4; en_set(m, h, MC_DISG, dg_bst(en_get(m, h, MC_DISG), 4)) }
3930 }
3931 var dx: i64 = it_sin4096(ph*3 % (2*IT_PI))*5/WATER_MAGIC_4096
3932 var dz: i64 = it_cos4096(ph*3 % (2*IT_PI))*5/WATER_MAGIC_4096
3933 if bst == 1 {
3934 // SOCIALIZE: walk to the nearest other girl; inside 1.2 blocks, stand together
3935 var snd: i64 = SAVE_CK_MASK
3936 var snx: i64 = x
3937 var snz: i64 = z
3938 var snk: i64 = 0 - 1
3939 var ks: i64 = 0
3940 while ks < en_count(m) {
3941 let hs: i64 = en_nth(m, ks)
3942 if hs != h {
3943 var sdx: i64 = en_get(m, hs, MC_X) - x
3944 if sdx < 0 { sdx = 0 - sdx }
3945 var sdz: i64 = en_get(m, hs, MC_Z) - z
3946 if sdz < 0 { sdz = 0 - sdz }
3947 if sdx + sdz < snd { snd = sdx + sdz; snx = en_get(m, hs, MC_X); snz = en_get(m, hs, MC_Z); snk = ks }
3948 }
3949 ks = ks + 1
3950 }
3951 dx = 0
3952 dz = 0
3953 if snd > 300 {
3954 if snx > x + 32 { dx = 4 }
3955 if snx < x - 32 { dx = 0 - 4 }
3956 if snz > z + 32 { dz = 4 }
3957 if snz < z - 32 { dz = 0 - 4 }
3958 }
3959 if snd <= 300 {
3960 ph = ph - 4 // stilled gait: talking, not marching
3961 if (s[S_T] + h) % 4 == 0 { // company relieves loneliness
3962 nd[nb + 2] = nd[nb + 2] - 10
3963 if nd[nb + 2] < 0 { nd[nb + 2] = 0 }
3964 }
3965 // C5: CONVERSATION MOVES FACTS. One fact passes speaker->listener with
3966 // confidence -15; below conf 30 the predicate may FLIP (1<->2) -- rumor
3967 // decays into misinformation BY MECHANIC, and hearing it leaves a thought.
3968 if (s[S_T] + h) % 128 == 0 {
3969 th_add(base, k, TH_COMPANY, 5, 1200)
3970 let gi: i64 = go_newest(base, k)
3971 if gi >= 0 { if snk >= 0 {
3972 let gw: i64 = mindp(base)[k*24 + 16 + gi*2]
3973 let conf2: i64 = (gw & 255) - 15
3974 if conf2 > 0 {
3975 var pred2: i64 = (gw >> 8) & 255
3976 if conf2 < 30 { if whash(s[S_T], k*31 + snk, s[S_SEED] + 777) % 3 == 0 {
3977 pred2 = 3 - pred2
3978 } }
3979 go_add(base, snk, gw >> 16, pred2, conf2)
3980 if pred2 == GO_TAKEN { th_add(base, snk, TH_HEARD_TAKEN, 0 - 10, 7200) }
3981 if pred2 == GO_FRIEND { th_add(base, snk, TH_HEARD_FRIEND, 6, 7200) }
3982 }
3983 } }
3984 }
3985 }
3986 }
3987 if bst == 2 {
3988 dx = 0
3989 dz = 0
3990 ph = ph - 4 // REST: seated stillness
3991 if (s[S_T] + h) % 4 == 0 { // sleep restores; night sleep restores MORE
3992 var rg: i64 = 2
3993 if night == 1 { rg = 8 }
3994 nd[nb + 1] = nd[nb + 1] + rg
3995 if nd[nb + 1] > 1000 { nd[nb + 1] = 1000 }
3996 }
3997 }
3998 if bst == 3 {
3999 // FORAGE: graze rhythm -- steps then a pause, head-down cadence; grazing feeds her
4000 if (s[S_T] + h) % 16 >= 6 { dx = 0; dz = 0; ph = ph - 3 }
4001 if (s[S_T] + h) % 8 == 0 {
4002 nd[nb] = nd[nb] - 12
4003 if nd[nb] < 0 { nd[nb] = 0 }
4004 }
4005 }
4006 if bst == 4 {
4007 // FLEE: straight away from the nearest warden, fast
4008 var wnd2: i64 = SAVE_CK_MASK
4009 var wax: i64 = x
4010 var waz: i64 = z
4011 var kf2: i64 = 0
4012 while kf2 < en_count(m) {
4013 let hf2: i64 = en_nth(m, kf2)
4014 if en_get(m, hf2, MC_KIND) == 2 { if (en_get(m, hf2, MC_DISG) & 1) == 0 {
4015 var fdx2: i64 = en_get(m, hf2, MC_X) - x
4016 if fdx2 < 0 { fdx2 = 0 - fdx2 }
4017 var fdz2: i64 = en_get(m, hf2, MC_Z) - z
4018 if fdz2 < 0 { fdz2 = 0 - fdz2 }
4019 if fdx2 + fdz2 < wnd2 { wnd2 = fdx2 + fdz2; wax = en_get(m, hf2, MC_X); waz = en_get(m, hf2, MC_Z) }
4020 } }
4021 kf2 = kf2 + 1
4022 }
4023 dx = 0
4024 dz = 0
4025 if wax > x { dx = 0 - 6 }
4026 if wax <= x { dx = 6 }
4027 if waz > z { dz = 0 - 6 }
4028 if waz <= z { dz = 6 }
4029 }
4030 // PERSONALITY (genome bits 13-15, INHERITED): the bold<->shy spectrum photographers
4031 // know -- engagement is a RANGE, not one script. Near the player: shy girls (0-1)
4032 // retreat and keep 5 blocks; watchful ones (2-3) freeze and observe, backing off
4033 // only if crowded; warm ones (4-5) approach to a polite arm's length; bold ones
4034 // (6-7) come right to your side. FORAGE also reads it: bold girls gather TOWARD
4035 // you (the obvious pick-up), shy girls drift their gathering away (the oblivious).
4036 let pdx: i64 = s[S_CX] - x
4037 let pdz: i64 = s[S_CZ] - z
4038 var pd: i64 = pdx
4039 if pd < 0 { pd = 0 - pd }
4040 var pdz2: i64 = pdz
4041 if pdz2 < 0 { pdz2 = 0 - pdz2 }
4042 let bold: i64 = (en_get(m, h, MC_GENE) >> 13) & 7
4043 // HABITUATION: the approach/watch drive runs only while she is lonely enough to
4044 // care (the player is a smart object too -- company below relieves the need, and a
4045 // satisfied girl walks on). Shy retreat is FEAR, not curiosity: never gated.
4046 var curi: i64 = 1
4047 if nd[nb + 2] < wsp(base)[P_CURI] { curi = 0 }
4048 if bold <= 1 { curi = 1 }
4049 if curi == 1 { if bst != 2 { if bst != 4 { if pd + pdz2 < 6*256 {
4050 var twd: i64 = 0 // -1 retreat, 0 hold, +1 approach
4051 var stopd: i64 = 400
4052 var spd: i64 = 3
4053 if bold <= 1 { twd = 0 - 1; stopd = 5*256; spd = 5 }
4054 if bold >= 2 { if bold <= 3 {
4055 twd = 0
4056 if pd + pdz2 < 2*256 { twd = 0 - 1; stopd = 2*256; spd = 4 }
4057 } }
4058 if bold >= 4 { if bold <= 5 { twd = 1; stopd = 400; spd = 3 } }
4059 if bold >= 6 { twd = 1; stopd = 200; spd = 5 }
4060 if bst == 3 { if twd != 0 { spd = 2 } } // gathering: the drift is subtle
4061 if twd == 1 { if pd + pdz2 > stopd {
4062 // S1 F-FORMATION SLOT (the social-interaction brief, rung S1): her approach
4063 // target is HER slot on the ring around the player, never the player center
4064 // -- N approaching girls used to converge on one point and bunch into a
4065 // queue ("they just follow me around"). Slot angle = a stable hash of her
4066 // handle; radius = her OWN personality stop distance, so bold girls ring
4067 // close and warm girls ring at arm's length (proxemics stays personal).
4068 let sa9: i64 = (h*1741) % (2*IT_PI)
4069 let tx9: i64 = s[S_CX] + it_cos4096(sa9)*stopd/WATER_MAGIC_4096
4070 let tz9: i64 = s[S_CZ] + it_sin4096(sa9)*stopd/WATER_MAGIC_4096
4071 let sdx9: i64 = tx9 - x
4072 let sdz9: i64 = tz9 - z
4073 dx = 0
4074 if sdx9 > 128 { dx = spd }
4075 if sdx9 < 0 - 128 { dx = 0 - spd }
4076 dz = 0
4077 if sdz9 > 128 { dz = spd }
4078 if sdz9 < 0 - 128 { dz = 0 - spd }
4079 } }
4080 if twd == 1 { if pd + pdz2 <= stopd { if bst == 0 { dx = 0; dz = 0; ph = ph - 4 } } }
4081 if twd == 0 - 1 { if pd + pdz2 < stopd {
4082 dx = spd
4083 if pdx > 0 { dx = 0 - spd }
4084 dz = spd
4085 if pdz > 0 { dz = 0 - spd }
4086 } }
4087 if twd == 0 { if bst == 0 { dx = 0; dz = 0; ph = ph - 4 } } // the watcher stands
4088 } } } }
4089 // RELATIONSHIP (the FLIAW arc): shared time within arm's reach becomes FRIENDSHIP,
4090 // stored in MC_DISG bits 6-13 (cap 250) -- persisted with the mob arena, so a bond
4091 // survives every save/load. Meeting her (E) adds a step-change on top.
4092 if pd + pdz2 < 3*256 { if (s[S_T] + h) % 64 == 0 {
4093 let dgf: i64 = en_get(m, h, MC_DISG)
4094 if ((dgf >> 6) & 255) < 250 { en_set(m, h, MC_DISG, dgf + 64) }
4095 } }
4096 // GAIT: TURN THE BODY TOWARD WHERE SHE IS GOING, RATE-LIMITED.
4097 // Placed HERE, on the INTENDED step, deliberately: (a) before the clearance clamp, so
4098 // a push out of a neighbouring solid can never feed the heading a direction she did
4099 // not choose -- the clamp exists to stop her entering a wall, not to steer her; and
4100 // (b) on the intent rather than the applied step, so a girl pressed against a wall
4101 // still turns away from it instead of standing frozen with a zero step and therefore
4102 // a zero turn allowance. The low-pass in wc_hdg_step is what makes this smooth; the
4103 // bang-bang steering above is left exactly as it was and is simply no longer read as
4104 // a facing.
4105 let hdgp: *i64 = (base + O_MOBHDG) as *i64
4106 hdgp[k] = wc_hdg_step(hdgp[k], dx, dz)
4107 let nx: i64 = x + dx
4108 let nz: i64 = z + dz
4109 let cy0: i64 = en_get(m, h, MC_Y)
4110 let g: i64 = mob_ground(base, nx >> 8, (cy0 >> 8) + 1, nz >> 8)
4111 var ok: i64 = 0
4112 if g >= 1 { if g < WY - 4 {
4113 let ng: i64 = wc_contact_floor_q(base,nx,nz,(cy0 >> 8)+1)
4114 var dyy: i64 = ng - cy0
4115 if dyy < 0 { dyy = 0 - dyy }
4116 // GE12b: resolve body clearance before testing the proposed column. Testing
4117 // mob_fits(nx) first rejects a step that enters a wall, so the clamp never runs.
4118 // The clearance reference is the actor's current ground, not a target wall's top.
4119 let g_here: i64 = mob_ground(base, x >> 8, (cy0 >> 8) + 1, z >> 8)
4120 let cxq: i64 = mob_clear_x(base, nx, nz, g_here)
4121 let czq: i64 = mob_clear_z(base, nx, nz, g_here)
4122 let clearance_changed: i64 = (cxq != nx || czq != nz) as i64
4123 if dyy <= 384 || (ng < cy0 && clearance_changed == 1) {
4124 if mob_fits(base, cxq >> 8, g, czq >> 8) == 1 {
4125 ok = 1
4126 // Re-derive the applied step from the clamped result: the motion doors
4127 // and gait accumulator report what actually happened.
4128 dx = cxq - x
4129 dz = czq - z
4130 en_set(m, h, MC_X, cxq)
4131 en_set(m, h, MC_Z, czq)
4132 // STEP, don't teleport -- and DROP, don't glide (GE12).
4133 en_set(m, h, MC_Y, mob_step_gait(vyp, k, cy0, wc_contact_floor_q(base,cxq,czq,(cy0 >> 8)+1)))
4134 // Final contact invariant: the applied position is checked again after gait
4135 // and floor resolution. This keeps the body radius clear even when a later
4136 // step changes cells or the target floor differs from the source floor.
4137 let xpost: i64 = en_get(m, h, MC_X)
4138 let zpost: i64 = en_get(m, h, MC_Z)
4139 let gpost: i64 = mob_ground(base, xpost >> 8, (en_get(m, h, MC_Y) >> 8) + 1, zpost >> 8)
4140 if gpost >= 1 { if gpost < WY - 4 {
4141 let xclear: i64 = mob_clear_x(base, xpost, zpost, gpost)
4142 let zclear: i64 = mob_clear_z(base, xclear, zpost, gpost)
4143 en_set(m, h, MC_X, xclear)
4144 en_set(m, h, MC_Z, zclear)
4145 } }
4146 } }
4147 } }
4148 // Final body-radius invariant applies to accepted, rejected and falling paths.
4149 // The world must never expose a body overlap merely because a movement door rejected
4150 // the intended step or because floor resolution changed the vertical column.
4151 let xf: i64 = en_get(m, h, MC_X)
4152 let zf: i64 = en_get(m, h, MC_Z)
4153 let yf: i64 = en_get(m, h, MC_Y)
4154 let gf: i64 = mob_ground(base, xf >> 8, (yf >> 8) + 1, zf >> 8)
4155 if gf >= 1 { if gf < WY - 4 {
4156 let xfc: i64 = mob_clear_x(base, xf, zf, gf)
4157 let zfc: i64 = mob_clear_z(base, xfc, zf, gf)
4158 if xfc != xf { dx = xfc - x }
4159 if zfc != zf { dz = zfc - z }
4160 en_set(m, h, MC_X, xfc)
4161 en_set(m, h, MC_Z, zfc)
4162 } }
4163 // Direct body-radius witness: derive the occupied vertical band from the actor
4164 // itself, then clamp against neighboring solids. This remains valid when the support
4165 // query changes during a rejected or falling step.
4166 let yband: i64 = (en_get(m, h, MC_Y) >> 8) - 1
4167 let xband: i64 = en_get(m, h, MC_X)
4168 let zband: i64 = en_get(m, h, MC_Z)
4169 let cxb: i64 = xband >> 8
4170 let czb: i64 = zband >> 8
4171 let fxb: i64 = xband - cxb*256
4172 let fzb: i64 = zband - czb*256
4173 if fxb < MOB_R_Q8 { if mob_solid2(base, cxb - 1, yband, czb) == 1 {
4174 en_set(m, h, MC_X, cxb*256 + MOB_R_Q8)
4175 } }
4176 if fxb > 256 - MOB_R_Q8 { if mob_solid2(base, cxb + 1, yband, czb) == 1 {
4177 en_set(m, h, MC_X, cxb*256 + 256 - MOB_R_Q8)
4178 } }
4179 if fzb < MOB_R_Q8 { if mob_solid2(base, cxb, yband, czb - 1) == 1 {
4180 en_set(m, h, MC_Z, czb*256 + MOB_R_Q8)
4181 } }
4182 if fzb > 256 - MOB_R_Q8 { if mob_solid2(base, cxb, yband, czb + 1) == 1 {
4183 en_set(m, h, MC_Z, czb*256 + 256 - MOB_R_Q8)
4184 } }
4185 let aux: *i64 = (base + O_MOBAUX) as *i64
4186 if ok == 1 { aux[k*3] = dx; aux[k*3 + 1] = dz; aux[k*3 + 2] = en_get(m, h, MC_Y) - cy0 }
4187 if ok == 0 {
4188 // wall/cliff: turn away -- but GE12 never leaves her hanging: if her own column's
4189 // stand height is below her (a block broke under her feet), she keeps falling.
4190 let g0: i64 = mob_ground(base, x >> 8, (cy0 >> 8) + 1, z >> 8)
4191 var dy0: i64 = 0
4192 let ownfloor: i64 = wc_contact_floor_q(base,x,z,(cy0 >> 8)+1)
4193 if g0 >= 1 { if ownfloor >= 0 { if ownfloor < cy0 {
4194 let ny0: i64 = mob_step_gait(vyp, k, cy0, ownfloor)
4195 en_set(m, h, MC_Y, ny0)
4196 dy0 = ny0 - cy0
4197 } } }
4198 // Rejected intent is not travelled distance; gait and footstrikes consume the applied step below.
4199 dx = 0; dz = 0
4200 aux[k*3] = 0; aux[k*3 + 1] = 0; aux[k*3 + 2] = dy0; ph = ph + 977
4201 }
4202 // PATH LENGTH for the gait drive -- Euclidean, and deliberately NOT the Manhattan proxy
4203 // mob_spd_q8i uses: that one is a calibrated blend THRESHOLD, this is a metric integral.
4204 // Conflating them would make a diagonal walk bob up to 41 percent fast, and would also
4205 // move a threshold that was measured against the proxy. Two named quantities, one job each.
4206 let ds9: i64 = sd_isqrt(dx*dx + dz*dz)
4207 let ga9: i64 = nd[nb + WC_NEED_GAIT]
4208 nd[nb + WC_NEED_GAIT] = ga9 + ds9
4209 // FOOTSTRIKE IMPULSE (sb_impulse_mob's FIRST world wiring -- gate-proven in
4210 // nx_softbind_gate and called by NO engine until now, so heel strike put NOTHING
4211 // into the tissue: the sponsored footfall row). Two ground-contact events kick
4212 // every spring point of this girl, both magnitudes DERIVED, converted into
4213 // sd_impulse's own units by WC_IMP_SCALE:
4214 // (1) HEEL STRIKE -- the stride-phase machinery places foot plant at the
4215 // leg-swing extremes sph = IT_PI/2 and 3*IT_PI/2 (wc_gp_leg is sin(sph);
4216 // its extremes are where the leading leg lands and double support begins).
4217 // In accumulated-path units those are ga == WC_STRIDE_Q8/4 modulo
4218 // WC_STRIDE_Q8/2, so (ga + WC_STRIDE_Q8/4)/(WC_STRIDE_Q8/2) counts foot
4219 // plants and an increment across this tick's travel IS one. Magnitude: each
4220 // step the body falls the gait bob's own declared peak-to-peak
4221 // (2*WC_GAIT_BOB_Q8) onto the leading leg and contact arrests it --
4222 // ballistic contact speed isqrt(2*GRAV * 2*WC_GAIT_BOB_Q8) = 15
4223 // world-q8/tick: the engine's own gravity through the engine's own declared
4224 // vertical excursion, no free parameter. (GRAV is the engine's stylized
4225 // gravity, so this inherits the same stylization every drop landing already
4226 // has -- consistent BY CONSTRUCTION, not calibrated to real-world g.)
4227 // (2) DROP LANDING -- GE12's integrator zeroed a real fall this tick; the
4228 // arrested |vy_pre| IS the ground-reaction delta-v, bounded by VTERM.
4229 // Sign: +y, the recoil-inheritance convention every softbind gate kick uses.
4230 // A standing girl accumulates no path and keeps vy == 0, so she is kicked by
4231 // nothing -- rest stays rest (the sd_deadsnap law undisturbed).
4232 if (ga9 + ds9 + WC_STRIDE_Q8/4)/(WC_STRIDE_Q8/2) != (ga9 + WC_STRIDE_Q8/4)/(WC_STRIDE_Q8/2) {
4233 sb_impulse_mob((base + O_SOFT) as *i64, k, 0, sd_isqrt(2*GRAV*2*WC_GAIT_BOB_Q8)*WC_IMP_SCALE, 0)
4234 }
4235 if vy_pre < 0 { if vyp[k] == 0 {
4236 sb_impulse_mob((base + O_SOFT) as *i64, k, 0, (0 - vy_pre)*WC_IMP_SCALE, 0)
4237 } }
4238 en_set(m, h, MC_PH, ph)
4239 // A4: the soft-body springs tick from ROOT TRUTH + HER GAIT: the anchor carries a
4240 // cadence-coupled thorax bob (published gait biomechanics -- vertical thorax
4241 // oscillation is what drives chest motion; a flat anchor was why nothing moved),
4242 // and the chest band is BRED (genome bits 16-17: firm rides tight, soft swings).
4243 // ★THE SOLVER AND THE INSTRUMENT MUST SHARE ONE REFERENCE (fixed 2026-08-03).
4244 // This tick used to drive the spring toward a RAW gait sinusoid while sbyb and every
4245 // probe subtracted mob_anchor_q8 -- the gait<->breath crossfade. Their difference rode
4246 // the rendered offset as a spurious term, and because ph advances +5 EVERY TICK FOREVER
4247 // the raw bob never quiets, so a STANDING girl still bounced: the 2026-08-02 breath fix
4248 // landed in the INSTRUMENT path and never reached the PHYSICS path. (The comment that
4249 // stood here claimed the bob 'quiets when she stands'. It does not. A comment asserting
4250 // a behaviour the code does not have is a landmine, so it is deleted with the defect.)
4251 // Driving the solver from the SAME anchor the instrument reads makes rest-bouncing
4252 // impossible BY CONSTRUCTION rather than by tuning. At walking speed the crossfade
4253 // weight saturates and the anchor EQUALS the old raw bob exactly => no-op in motion,
4254 // fix at rest: the safest shape a drive change can have.
4255 // ⚠STILL OPEN (debt 1785770635): ph is a FREE-RUNNING clock, so the drive is a fixed
4256 // 2.50Hz regardless of her real cadence while the render clip is DISTANCE-synced. Until
4257 // ph advances from travel, foot plant and tissue drive remain uncorrelated -- which is
4258 // the operator's actual report and is NOT closed by this change.
4259 sb_tick_mob_gene((base + O_SOFT) as *i64, k,
4260 en_get(m, h, MC_X)/4, (en_get(m, h, MC_Y) + mob_anchor_q8i(base, k))/4, en_get(m, h, MC_Z)/4,
4261 en_get(m, h, MC_GENE))
4262 }
4263 k = k + 1
4264 }
4265 // THE STAKES (losability doctrine: a find that cannot be lost is hollow): WARDENS -- real
4266 // demonkin -- hunt FOUND humans. Reached = TAKEN (the certified store's destroy, live in
4267 // production). The player's BODY blocks a warden within 2 blocks. One take per tick, max.
4268 var kw: i64 = 0
4269 var took: i64 = 0
4270 while kw < en_count(m) {
4271 if took == 0 {
4272 let hw: i64 = en_nth(m, kw)
4273 if en_get(m, hw, MC_KIND) == 2 { if (en_get(m, hw, MC_DISG) & 1) == 0 {
4274 var bestj: i64 = 0 - 1
4275 // the world declares its danger (P_WARD), night widens it, and the ARRIVING
4276 // TRAVELER'S LEVEL widens it further: a veteran isekai's stakes rise with him
4277 var wbase: i64 = wsp(base)[P_WARD]
4278 if wbase <= 0 { wbase = 12 }
4279 var bestd: i64 = wbase*256 + pass_level_of(base)*128
4280 if night == 1 { bestd = bestd + 8*256 } // the night belongs to the wardens
4281 var kj: i64 = 0
4282 while kj < en_count(m) {
4283 let hj: i64 = en_nth(m, kj)
4284 if (en_get(m, hj, MC_DISG) & 3) == 3 {
4285 var ddx2: i64 = en_get(m, hj, MC_X) - en_get(m, hw, MC_X)
4286 if ddx2 < 0 { ddx2 = 0 - ddx2 }
4287 var ddz2: i64 = en_get(m, hj, MC_Z) - en_get(m, hw, MC_Z)
4288 if ddz2 < 0 { ddz2 = 0 - ddz2 }
4289 if ddx2 + ddz2 < bestd { bestd = ddx2 + ddz2; bestj = kj }
4290 }
4291 kj = kj + 1
4292 }
4293 if bestj >= 0 {
4294 var pdx3: i64 = s[S_CX] - en_get(m, hw, MC_X)
4295 if pdx3 < 0 { pdx3 = 0 - pdx3 }
4296 var pdz3: i64 = s[S_CZ] - en_get(m, hw, MC_Z)
4297 if pdz3 < 0 { pdz3 = 0 - pdz3 }
4298 if pdx3 + pdz3 > 2*256 { // your presence stays her hand
4299 let hj2: i64 = en_nth(m, bestj)
4300 if bestd < 220 {
4301 // C3/C5: a TAKING is WITNESSED -- every girl within 16 blocks
4302 // carries the grief as a thought and the fact as gossip (source =
4303 // her own eyes, conf 100). The village REMEMBERS its losses.
4304 let tkx: i64 = en_get(m, hj2, MC_X)
4305 let tkz: i64 = en_get(m, hj2, MC_Z)
4306 var tkk: i64 = 0 - 1
4307 var kwi: i64 = 0
4308 while kwi < en_count(m) {
4309 if en_nth(m, kwi) == hj2 { tkk = kwi }
4310 kwi = kwi + 1
4311 }
4312 en_destroy(m, hj2)
4313 s[S_LOST] = s[S_LOST] + 1
4314 var kwj: i64 = 0
4315 while kwj < en_count(m) {
4316 let hwj: i64 = en_nth(m, kwj)
4317 if hwj > 0 {
4318 var wdx: i64 = en_get(m, hwj, MC_X) - tkx
4319 if wdx < 0 { wdx = 0 - wdx }
4320 var wdz: i64 = en_get(m, hwj, MC_Z) - tkz
4321 if wdz < 0 { wdz = 0 - wdz }
4322 if wdx + wdz < 16*256 {
4323 th_add(base, kwj, TH_SAWTAKEN, 0 - 25, 14400)
4324 if tkk >= 0 { go_add(base, kwj, tkk, GO_TAKEN, 100) }
4325 }
4326 }
4327 kwj = kwj + 1
4328 }
4329 took = 1
4330 }
4331 if bestd >= 220 { if took == 0 {
4332 let txq: i64 = en_get(m, hj2, MC_X)
4333 let tzq: i64 = en_get(m, hj2, MC_Z)
4334 // Chase speed derives from the world's declared warden reach;
4335 // it is not a second untracked tuning constant.
4336 var wv: i64 = wbase/2
4337 if wv < 1 { wv = 1 }
4338 if night == 1 { wv = wv + wv/2 } // darkness increases the declared threat
4339 var mx3: i64 = 0
4340 if txq > en_get(m, hw, MC_X) + 32 { mx3 = wv }
4341 if txq < en_get(m, hw, MC_X) - 32 { mx3 = 0 - wv }
4342 var mz3: i64 = 0
4343 if tzq > en_get(m, hw, MC_Z) + 32 { mz3 = wv }
4344 if tzq < en_get(m, hw, MC_Z) - 32 { mz3 = 0 - wv }
4345 en_set(m, hw, MC_X, en_get(m, hw, MC_X) + mx3)
4346 en_set(m, hw, MC_Z, en_get(m, hw, MC_Z) + mz3)
4347 } }
4348 }
4349 }
4350 } }
4351 }
4352 kw = kw + 1
4353 }
4354 // INHERITANCE (the past-DAZ lever, live): two MET girls keeping close company bear a
4355 // DAUGHTER -- her genome FIELD-CROSSED from both parents (the breeders gcross pattern),
4356 // spawned through the certified store (capacity-bounded), cooldown-paced. Display cap 12.
4357 if s[S_BCD] > 0 { s[S_BCD] = s[S_BCD] - 1 }
4358 if s[S_BCD] == 0 { if en_count(m) < MOB_CAP {
4359 var ka: i64 = 0
4360 var born: i64 = 0
4361 while ka < en_count(m) {
4362 if born == 0 {
4363 let ha: i64 = en_nth(m, ka)
4364 if (en_get(m, ha, MC_DISG) & 2) == 2 {
4365 var kb2: i64 = ka + 1
4366 while kb2 < en_count(m) {
4367 if born == 0 {
4368 let hb2: i64 = en_nth(m, kb2)
4369 if (en_get(m, hb2, MC_DISG) & 2) == 2 {
4370 var bdx4: i64 = en_get(m, ha, MC_X) - en_get(m, hb2, MC_X)
4371 if bdx4 < 0 { bdx4 = 0 - bdx4 }
4372 var bdz4: i64 = en_get(m, ha, MC_Z) - en_get(m, hb2, MC_Z)
4373 if bdz4 < 0 { bdz4 = 0 - bdz4 }
4374 if bdx4 + bdz4 < 400 {
4375 let hn: i64 = en_spawn(m)
4376 if hn > 0 {
4377 let ga: i64 = en_get(m, ha, MC_GENE)
4378 let gb: i64 = en_get(m, hb2, MC_GENE)
4379 let pick: i64 = whash(ga, gb, s[S_T])
4380 var gn: i64 = 0
4381 var fm: i64 = 0
4382 while fm < 8 {
4383 var msk: i64 = 7
4384 if fm == 1 { msk = 24 }
4385 if fm == 2 { msk = 96 }
4386 if fm == 3 { msk = 384 }
4387 if fm == 4 { msk = WATER_MAGIC_1536 }
4388 if fm == 5 { msk = WATER_MAGIC_6144 }
4389 if fm == 6 { msk = GENE_MASK_TEMPERAMENT } // bits 13-15: TEMPERAMENT (bold<->shy) is bred too
4390 if fm == 7 { msk = 983040 } // bits 16-19: BODY NATURE (firmness 16-17 +
4391 // beachwear nature 18-19) bred as one field --
4392 // un-crossed genome bits default every daughter
4393 // to one body (the class this row eats); pick
4394 // has only 8 hash bits, so 16-19 share fm 7
4395 if ((pick >> fm) & 1) == 1 { gn = gn | (ga & msk) }
4396 if ((pick >> fm) & 1) == 0 { gn = gn | (gb & msk) }
4397 fm = fm + 1
4398 }
4399 en_set(m, hn, MC_GENE, gn)
4400 en_set(m, hn, MC_X, (en_get(m, ha, MC_X) + en_get(m, hb2, MC_X))/2)
4401 en_set(m, hn, MC_Y, en_get(m, ha, MC_Y))
4402 en_set(m, hn, MC_Z, (en_get(m, ha, MC_Z) + en_get(m, hb2, MC_Z))/2)
4403 var kk: i64 = en_get(m, ha, MC_KIND)
4404 if ((pick >> 6) & 1) == 1 { kk = en_get(m, hb2, MC_KIND) }
4405 en_set(m, hn, MC_KIND, kk)
4406 let da: i64 = en_get(m, ha, MC_DISG) & 1
4407 let db: i64 = en_get(m, hb2, MC_DISG) & 1
4408 var dn: i64 = 0
4409 if da == 1 { if db == 1 { dn = 1 } }
4410 if da != db { dn = (pick >> 7) & 1 }
4411 en_set(m, hn, MC_DISG, dn)
4412 en_set(m, hn, MC_PH, whash(gn, pick, s[S_T]) % WATER_MAGIC_4096)
4413 // seat the newborn's springs + needs (dense tail slot)
4414 let nk9: i64 = en_count(m) - 1
4415 sb_seat_mob((base + O_SOFT) as *i64, nk9,
4416 en_get(m, hn, MC_X)/4, en_get(m, hn, MC_Y)/4, en_get(m, hn, MC_Z)/4)
4417 let nd9: *i64 = (base + O_NEED) as *i64
4418 nd9[nk9*4] = 400
4419 nd9[nk9*4 + 1] = 800
4420 nd9[nk9*4 + 2] = 500
4421 nd9[nk9*4 + 3] = 0
4422 s[S_BCD] = 900
4423 born = 1
4424 }
4425 }
4426 }
4427 }
4428 kb2 = kb2 + 1
4429 }
4430 }
4431 }
4432 ka = ka + 1
4433 }
4434 } }
4435 return 0
4436}
4437
4438// the full FPS control core: fwd/strafe movement, keyboard turn + analog mouselook, keyboard pitch,
4439// jump with real gravity (auto-step <=1.5 blocks stays; 2+ needs a jump), then targeting + edits.
4440func beach_contact_cell_solid(base: i64, x: i64, y: i64, z: i64) -> i64 {
4441 let material: i64=vget(base,x,y,z)
4442 if wsp(base)[P_SURF] == 1 { if wterrain(material) == 1 { return 0 } }
4443 return vsolid(base,x,y,z)
4444}
4445// Construct the same solid-union obstacle for sweep and initial-overlap tests.
4446func beach_contact_union_cell(base: i64, body: *BeachContactBox, obstacle: *BeachContactBox, x: i64, y: i64, z: i64) -> i64 {
4447obstacle.min_x=x*256; obstacle.max_x=(x+1)*256
4448obstacle.min_y=y*256; obstacle.max_y=(y+1)*256
4449obstacle.min_z=z*256; obstacle.max_z=(z+1)*256
4450// A zero-width footprint may lie on a grid seam. Shared solid faces are
4451// interior to the union; an exposed wall face remains tangential contact.
4452var joined_x: i64=0
4453if body.min_x == body.max_x && body.min_x == obstacle.min_x {
4454 if beach_contact_cell_solid(base,x-1,y,z) == 1 {
4455 obstacle.min_x=obstacle.min_x-256; joined_x=1
4456 }
4457}
4458if body.min_z == body.max_z && body.min_z == obstacle.min_z {
4459 var join_z: i64=beach_contact_cell_solid(base,x,y,z-1)
4460 if joined_x == 1 { if beach_contact_cell_solid(base,x-1,y,z-1) == 0 { join_z=0 } }
4461 if join_z == 1 { obstacle.min_z=obstacle.min_z-256 }
4462}
4463
4464 return 0
4465}
4466func beach_contact_world_sweep(base: i64, body: *BeachContactBox, obstacle: *BeachContactBox, result: *BeachContactResult, axis: i64, delta_q8: i64) -> i64 {
4467 var minx: i64=body.min_x
4468 var miny: i64=body.min_y
4469 var minz: i64=body.min_z
4470 var maxx: i64=body.max_x
4471 var maxy: i64=body.max_y
4472 var maxz: i64=body.max_z
4473 if axis == 0 { if delta_q8 < 0 { minx=minx+delta_q8 } else { maxx=maxx+delta_q8 } }
4474 if axis == 1 { if delta_q8 < 0 { miny=miny+delta_q8 } else { maxy=maxy+delta_q8 } }
4475 if axis == 2 { if delta_q8 < 0 { minz=minz+delta_q8 } else { maxz=maxz+delta_q8 } }
4476 let x0: i64=wclamp(minx >> 8,0,WX-1)
4477 let y0: i64=wclamp(miny >> 8,0,WY-1)
4478 let z0: i64=wclamp(minz >> 8,0,WZ-1)
4479 var x1: i64=wclamp((maxx-1) >> 8,0,WX-1)
4480 var y1: i64=wclamp((maxy-1) >> 8,0,WY-1)
4481 var z1: i64=wclamp((maxz-1) >> 8,0,WZ-1)
4482 if maxx == minx { x1=x0 }
4483 if maxy == miny { y1=y0 }
4484 if maxz == minz { z1=z0 }
4485 result.delta_q8=delta_q8
4486 result.initial_overlap=0
4487 result.hit_material=0
4488 var y: i64=y0
4489 while y <= y1 {
4490 var z: i64=z0
4491 while z <= z1 {
4492 var x: i64=x0
4493 while x <= x1 {
4494 let material: i64=vget(base,x,y,z)
4495 let solid: i64=beach_contact_cell_solid(base,x,y,z)
4496 if solid == 1 {
4497 beach_contact_union_cell(base,body,obstacle,x,y,z)
4498 if beach_contact_overlap(body,obstacle) == 1 { result.initial_overlap=1 }
4499 let clipped: i64=beach_contact_clip(body,obstacle,axis,result.delta_q8)
4500 if clipped != result.delta_q8 { result.hit_material=material; result.delta_q8=clipped }
4501 }
4502 x=x+1
4503 }
4504 z=z+1
4505 }
4506 y=y+1
4507 }
4508 return result.delta_q8
4509}
4510
4511// Dedicated fixed scratch is outside the persisted save image. No per-frame allocation.
4512func wc_contact_body(base: i64) -> *BeachContactBox { return (base+O_CONTACT) as *BeachContactBox }
4513func wc_contact_obstacle(base: i64) -> *BeachContactBox { return (base+O_CONTACT+CONTACT_BOX_WORDS*8) as *BeachContactBox }
4514func wc_contact_result(base: i64) -> *BeachContactResult { return (base+O_CONTACT+2*CONTACT_BOX_WORDS*8) as *BeachContactResult }
4515func wc_contact_state(base: i64) -> *i64 { return (base+O_CONTACT+(2*CONTACT_BOX_WORDS+CONTACT_RESULT_WORDS)*8) as *i64 }
4516// Flags report initial overlap, axes that clipped a requested sweep, and last hit material.
4517func contact_initial_overlap_impl(base: i64) -> i64 { return wc_contact_state(base)[0] }
4518func contact_clipped_axes_impl(base: i64) -> i64 { return wc_contact_state(base)[1] }
4519func contact_material_impl(base: i64) -> i64 { return wc_contact_state(base)[2] }
4520func wc_player_body(base: i64, x: i64, y: i64, z: i64) -> i64 {
4521 let body: *BeachContactBox=wc_contact_body(base)
4522 // Legacy horizontal point footprint is explicit, not an anatomical body-width claim.
4523 body.min_x=x; body.max_x=x
4524 body.min_y=y-EYE; body.max_y=y+128
4525 body.min_z=z; body.max_z=z
4526 return 0
4527}
4528func wc_player_sweep(base: i64, x: i64, y: i64, z: i64, axis: i64, delta: i64) -> i64 {
4529 wc_player_body(base,x,y,z)
4530 let result: *BeachContactResult=wc_contact_result(base)
4531 let moved: i64=beach_contact_world_sweep(base,wc_contact_body(base),wc_contact_obstacle(base),result,axis,delta)
4532 let audit: *i64=wc_contact_state(base)
4533 if result.initial_overlap == 1 { audit[0]=1 }
4534 if moved != delta { audit[1]=audit[1] | (1 << axis); audit[2]=result.hit_material }
4535 return moved
4536}
4537// A bilinear field is linear along each axis inside one grid cell. Its maximum
4538// on an axis path is therefore at an endpoint or crossed grid boundary.
4539func wc_player_field_path_max(base: i64, x: i64, z: i64, axis: i64, delta: i64) -> i64 {
4540 var endx: i64=x
4541 var endz: i64=z
4542 if axis == 0 { endx=endx+delta } else { endz=endz+delta }
4543 var highest: i64=wc_surface_source(base,x,z)
4544 let endfloor: i64=wc_surface_source(base,endx,endz)
4545 if highest < 0 || endfloor < 0 { return -1 }
4546 if endfloor > highest { highest=endfloor }
4547 var lo: i64=x
4548 if axis == 2 { lo=z }
4549 var hi: i64=lo+delta
4550 if hi < lo { let swap: i64=lo; lo=hi; hi=swap }
4551 var boundary: i64=((lo >> 8)+1)*256
4552 while boundary < hi {
4553 var bx: i64=x
4554 var bz: i64=z
4555 if axis == 0 { bx=boundary } else { bz=boundary }
4556 let sample: i64=wc_surface_source(base,bx,bz)
4557 if sample < 0 { return -1 }
4558 if sample > highest { highest=sample }
4559 boundary=boundary+256
4560 }
4561 return highest
4562}
4563func wc_player_field_clip(base: i64, x: i64, y: i64, z: i64, axis: i64, delta: i64) -> i64 {
4564 if wsp(base)[P_SURF] != 1 { return delta }
4565 let feet: i64=y-EYE
4566 let full: i64=wc_player_field_path_max(base,x,z,axis,delta)
4567 if full >= 0 && full <= feet { return delta }
4568 var extent: i64=delta
4569 var sign: i64=1
4570 if extent < 0 { extent=0-extent; sign=-1 }
4571 var lo: i64=0
4572 var hi: i64=extent
4573 while hi-lo > 1 {
4574 let mid: i64=(lo+hi)/2
4575 let height: i64=wc_player_field_path_max(base,x,z,axis,mid*sign)
4576 if height >= 0 && height <= feet { lo=mid } else { hi=mid }
4577 }
4578 return lo*sign
4579}
4580func wc_player_support(base: i64, x: i64, z: i64, ceiling: i64) -> i64 {
4581 let floor: i64=wc_contact_floor_below_q(base,x,z,WY-1,ceiling)
4582 if floor < 0 { return -1 }
4583 var stand: i64=floor+EYE
4584 let water: i64=wsp(base)[P_WATER]
4585 let water_stand: i64=(water+1)*256+EYE-96
4586 if stand < water_stand { if vget(base,x >> 8,water,z >> 8) == 4 { stand=water_stand } }
4587 return stand
4588}
4589func wc_player_axis_apply(base: i64, axis: i64, requested: i64, can_step: i64) -> i64 {
4590 let contact: *BeachContactResult=wc_contact_result(base)
4591 if requested == 0 { return 0 }
4592 let s: *i64=wst(base)
4593 let x: i64=s[S_CX]
4594 let y: i64=s[S_CY]
4595 let z: i64=s[S_CZ]
4596 var moved: i64=wc_player_sweep(base,x,y,z,axis,requested)
4597 if contact.initial_overlap == 1 { return 0 }
4598 moved=wc_player_field_clip(base,x,y,z,axis,moved)
4599 if can_step == 1 && moved != requested {
4600 var targetx: i64=x
4601 var targetz: i64=z
4602 if axis == 0 { targetx=targetx+requested } else { targetz=targetz+requested }
4603 // Existing controller allowance is retained. The trajectory, not just its destination, must fit.
4604 let allowance: i64=384
4605 let target: i64=wc_player_support(base,targetx,targetz,y-EYE+allowance)
4606 var raised: i64=target
4607 var path_valid: i64=1
4608 if wsp(base)[P_SURF] == 1 {
4609 let path_floor: i64=wc_player_field_path_max(base,x,z,axis,requested)
4610 if path_floor < 0 { path_valid=0 }
4611 if path_floor+EYE > raised { raised=path_floor+EYE }
4612 }
4613 let rise: i64=raised-y
4614 if target >= 0 && path_valid == 1 && rise > 0 && rise <= allowance {
4615 let up: i64=wc_player_sweep(base,x,y,z,1,rise)
4616 if up == rise && contact.initial_overlap == 0 {
4617 let across: i64=wc_player_sweep(base,x,raised,z,axis,requested)
4618 if across == requested && contact.initial_overlap == 0 {
4619 let down: i64=wc_player_sweep(base,targetx,raised,targetz,1,target-raised)
4620 if contact.initial_overlap == 0 {
4621 s[S_CX]=targetx; s[S_CZ]=targetz; s[S_CY]=raised+down
4622 s[S_GROUNDED]=1
4623 return requested
4624 }
4625 }
4626 }
4627 }
4628 }
4629 if axis == 0 { s[S_CX]=x+moved } else { s[S_CZ]=z+moved }
4630 return moved
4631}
4632func wc_player_vertical_apply(base: i64, jump: i64) -> i64 {
4633 let contact: *BeachContactResult=wc_contact_result(base)
4634 let s: *i64=wst(base)
4635 let oldy: i64=s[S_CY]
4636 var velocity: i64=s[S_VY]
4637 if jump == 1 && s[S_GROUNDED] == 1 { velocity=JUMPV }
4638 velocity=velocity-GRAV
4639 if velocity < 0-VTERM { velocity=0-VTERM }
4640 let requested: i64=velocity
4641 let moved: i64=wc_player_sweep(base,s[S_CX],oldy,s[S_CZ],1,requested)
4642 var nexty: i64=oldy+moved
4643 s[S_GROUNDED]=0
4644 if moved != requested {
4645 velocity=0
4646 if requested < 0 && contact.initial_overlap == 0 { s[S_GROUNDED]=1 }
4647 }
4648 // Field and existing water support use the same position as structural sweeps.
4649 let stand: i64=wc_player_support(base,s[S_CX],s[S_CZ],oldy-EYE)
4650 if requested <= 0 && stand >= 0 && nexty <= stand {
4651 if stand <= oldy { nexty=stand; velocity=0; s[S_GROUNDED]=1 }
4652 else {
4653 let lift: i64=wc_player_sweep(base,s[S_CX],oldy,s[S_CZ],1,stand-oldy)
4654 nexty=oldy+lift; velocity=0
4655 if nexty == stand && contact.initial_overlap == 0 { s[S_GROUNDED]=1 }
4656 }
4657 }
4658 s[S_CY]=nexty
4659 s[S_VY]=velocity
4660 return nexty
4661}
4662func wc_player_motion(base: i64, mx: i64, mz: i64, jump: i64) -> i64 {
4663 let audit: *i64=wc_contact_state(base)
4664 audit[0]=0; audit[1]=0; audit[2]=0
4665 let s: *i64=wst(base)
4666 wc_player_axis_apply(base,0,mx,s[S_GROUNDED])
4667 wc_player_axis_apply(base,2,mz,s[S_GROUNDED])
4668 return wc_player_vertical_apply(base,jump)
4669}
4670
4671func apply2_impl(base: i64, fwd: i64, strafe: i64, turn: i64,
4672 lookx: i64, looky: i64, pit: i64, jump: i64, brk: i64, plc: i64) -> i64 {
4673 let s: *i64 = wst(base)
4674 let dp59: i64 = wsp(base)[P_DAYPHASE]
4675 if dp59 > 0 { if s[S_DPAPPLIED] != dp59 { s[S_T] = dp59; s[S_DPAPPLIED] = dp59 } } // GE59: a poked day phase re-bases the clock ONCE per distinct value (0 =