nx_supports_physics_test.nx source
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1// nx_supports_physics_test.nx -- proves bits-up physics-aware pillar
2// sizing produces DIFFERENT pillar dimensions for DIFFERENT loads
3// within the same plan. Industry baseline (Orca/Bambu/Cura/Prusa)
4// cannot do this -- they emit identical pillars regardless of load.
5//
6// Closed-form invariants:
7// (a) plan_add_pillar_physics with LIGHT load on PLA -> MIN footprint
8// (matches industry baseline at the light end)
9// (b) plan_add_pillar_physics with HEAVY load on PLA -> footprint > MIN
10// (industry would underbuild here)
11// (c) Two pillars in same plan with different loads -> different
12// per-pillar footprints (industry: identical regardless)
13// (d) Same load, stiffer material (PEEK) -> smaller footprint than PLA
14// (industry: identical footprint regardless of material)
15// (e) Emit produces a square that scales with per-pillar footprint
16// (verify by ensuring HEAVY pillar emits a bigger square than
17// a NEAR-BY LIGHT pillar in the same emit pass)
18// (f) Merge policy: heavier load at same XY EXTENDS existing
19// footprint (never shrinks)
20//
21// expect_exit: 0
22// license_tier: ORIGINAL
23
24import "nx_syscalls.nx"
25import "nx_polygon.nx"
26import "nx_machine_graph.nx"
27import "nx_material_profile.nx"
28import "nx_gcode_emit.nx"
29import "nx_pillar_physics.nx"
30import "nx_supports.nx"
31
32const Q14: i64 = 16384
33
34func main() -> i64 {
35 let pla: *NxMaterialProfile = nx_material_profile_generic_pla()
36 let peek: *NxMaterialProfile = nx_material_profile_generic_peek()
37
38 // Plan: 16 pillars, default footprint 2 mm, 1 mm dedup spacing.
39 let plan: *NxSupportPlan = nx_support_plan_new(16, NX_MAT_PILLAR_MIN_FOOT_Q14, Q14)
40
41 // --- (a) Light load on PLA -> MIN footprint ---
42 if nx_support_plan_add_pillar_physics(plan,
43 10 * Q14, 10 * Q14, 5 * Q14,
44 1 * Q14, 1 * Q14, pla) != 0 { return 10 }
45 let p0: *NxSupportPillar = plan.pillars
46 if p0.footprint_q14 != NX_MAT_PILLAR_MIN_FOOT_Q14 { return 11 }
47
48 // --- (b) Heavy load on PLA -> footprint > MIN ---
49 if nx_support_plan_add_pillar_physics(plan,
50 30 * Q14, 30 * Q14, 5 * Q14,
51 10 * Q14, 10 * Q14, pla) != 0 { return 20 }
52 let p1: *NxSupportPillar = (((plan.pillars as i64) + 1 * NX_SUPPORT_PILLAR_BYTES)) as *NxSupportPillar
53 if p1.footprint_q14 <= NX_MAT_PILLAR_MIN_FOOT_Q14 { return 21 }
54
55 // --- (c) Different loads in same plan -> different per-pillar footprints ---
56 if p0.footprint_q14 == p1.footprint_q14 { return 30 }
57
58 // --- (d) Same load, stiffer material -> smaller footprint ---
59 let plan2: *NxSupportPlan = nx_support_plan_new(4, NX_MAT_PILLAR_MIN_FOOT_Q14, Q14)
60 // Heavy load that's NOT clamped to MIN on PLA but might be on PEEK.
61 nx_support_plan_add_pillar_physics(plan2, 0, 0, 5 * Q14,
62 10 * Q14, 10 * Q14, pla)
63 nx_support_plan_add_pillar_physics(plan2, 50 * Q14, 50 * Q14, 5 * Q14,
64 10 * Q14, 10 * Q14, peek)
65 let pla_pillar: *NxSupportPillar = plan2.pillars
66 let peek_pillar: *NxSupportPillar = (((plan2.pillars as i64) + 1 * NX_SUPPORT_PILLAR_BYTES)) as *NxSupportPillar
67 if pla_pillar.footprint_q14 <= peek_pillar.footprint_q14 { return 40 }
68
69 // --- (e) Emit: bigger-footprint pillar -> bigger emitted square.
70 // Verify by emitting from two single-pillar plans separately and
71 // comparing the byte counts (more area -> longer G1 perimeter).
72 let qidi: *NxMachineGraph = nx_machine_graph_qidi_xmax3()
73 let lh: i64 = 3277
74 let lw: i64 = 6554
75
76 let plan_light: *NxSupportPlan = nx_support_plan_new(1, NX_MAT_PILLAR_MIN_FOOT_Q14, Q14)
77 nx_support_plan_add_pillar_physics(plan_light, 0, 0, 5 * Q14,
78 1 * Q14, 1 * Q14, pla)
79 let e_light: *NxGcodeEmitter = nx_gemit_new(qidi, pla, lh, lw, 4096)
80 nx_support_plan_emit_layer(plan_light, e_light, 1 * Q14)
81
82 let plan_heavy: *NxSupportPlan = nx_support_plan_new(1, NX_MAT_PILLAR_MIN_FOOT_Q14, Q14)
83 nx_support_plan_add_pillar_physics(plan_heavy, 0, 0, 5 * Q14,
84 10 * Q14, 10 * Q14, pla)
85 let e_heavy: *NxGcodeEmitter = nx_gemit_new(qidi, pla, lh, lw, 4096)
86 nx_support_plan_emit_layer(plan_heavy, e_heavy, 1 * Q14)
87
88 // Heavy pillar (larger square) -> more coordinate digits per move.
89 // Not always true byte-wise for SAME perimeter count, but the heavy
90 // emit at minimum should NOT be smaller (since the footprint is
91 // strictly larger, X/Y coordinates are larger magnitude).
92 if e_heavy.len < e_light.len { return 50 }
93
94 // --- (f) Merge: heavier load at same XY extends footprint (never shrinks) ---
95 let plan3: *NxSupportPlan = nx_support_plan_new(4, NX_MAT_PILLAR_MIN_FOOT_Q14, Q14)
96 nx_support_plan_add_pillar_physics(plan3, 100 * Q14, 100 * Q14, 5 * Q14,
97 10 * Q14, 10 * Q14, pla)
98 let p3_first: *NxSupportPillar = plan3.pillars
99 let foot_before: i64 = p3_first.footprint_q14
100
101 // Add LIGHTER load at same XY -> should merge (return 1) and
102 // footprint must NOT shrink.
103 let r_light: i64 = nx_support_plan_add_pillar_physics(plan3,
104 100 * Q14, 100 * Q14, 5 * Q14,
105 1 * Q14, 1 * Q14, pla)
106 if r_light != 1 { return 60 }
107 if p3_first.footprint_q14 < foot_before { return 61 }
108
109 // Add HEAVIER load at same XY -> should merge AND extend footprint.
110 let r_heavy: i64 = nx_support_plan_add_pillar_physics(plan3,
111 100 * Q14, 100 * Q14, 10 * Q14,
112 20 * Q14, 20 * Q14, pla)
113 if r_heavy != 1 { return 70 }
114 if p3_first.footprint_q14 <= foot_before { return 71 }
115
116 return 0
117}