nx_worldpipe_render.nx

nx_worldpipe_render.nx -- THE PRODUCER OF THE PUBLISHED WORLD IMAGE, WITH STAGE 3.5 EROSION APPLIED. WHY THIS ORGAN EXISTS. The picture published at https://nishifamily.com/world/foundation had exactly ONE producer in the whole tree: nx_worldpipe_gate's T8 EVIDENCE emit. Measured, not assumed -- nx_shelltool grep over 23,207 sources returned coverage_complete=1 corpus_complete=1 and named that one write_png call as the only writer of knowledge/nx_worldpipe.png. A gate is a RULER; making it also the FACTORY means the shipped picture only refreshes when somebody runs the test, and it means the picture can never be given a parameter the test does not itself want. The factory is separated out here and the gate is left untouched. WHAT IS NEW IN THE PICTURE. PG20 shipped erosion as a PROCESS on this heightfield (wp_erode_bake / wp_erode, proven by nx_worldpipe_erode_gate 21/21 GREEN over the full 102,400-cell population) and it was INERT IN PRODUCTION BY CONSTRUCTION: WP_ERODE is armed by default, but wp_erode returns 0 until a bake has run and NO consumer anywhere called wp_erode_bake. A capability that never reaches a surface is not shipped, however green its gate is. This organ is the consumer that opts in. SCOPING, AND WHY NOBODY ELSE MOVES. The opt-in is the BAKE, not a flag. A consumer that never calls wp_erode_bake still has WP_ERG == 0, so wp_erode returns 0 and wp_height is byte-identical. Opting in HERE therefore cannot move nx_worldpipe_gate, nx_m2d_engine, nx_authorgen or any other importer -- and that is a property of the code, not a promise made in a comment. PARAMETERS -- NAMED OR DERIVED, NONE TASTED. wp_erode_bake_derived takes a tick BUDGET and derives everything else from the terrain it is about to erode (talus from the ground's own mean neighbour drop; rain and flux are the erosion library's unit rate Q). The budget below is NOT a taste constant: it is the exact budget nx_worldpipe_erode_gate exercises and proves -- at that budget material demonstrably MOVES, leaves steep ground for flat ground, conserves mass, and two bakes agree cell-for-cell. Adopting a budget already proven to do work is the declared basis. argv[2] overrides it so an A/B costs no rebuild. THE RENDER COMPOSITION IS COPIED, AND THAT IS DECLARED RATHER THAN HIDDEN. The block below reproduces nx_worldpipe_gate's T8 composition (biome map + spawn cross + 3D hero + biome features) because that composition is inline in the gate's main() and is therefore not callable. This is a second copy of a COMPOSITION, not of a RULER -- no judgement is duplicated -- and the real fix is to extract it into a shared wpv_render(). That is filed as debt, not forgotten. usage: nx_worldpipe_render [out.png] [ticks] exit: 0 written and read-back-verified | 2 usage | 5 png-write-or-readback-fail | 6 bake-refused license_tier: ORIGINAL No hw writes (Rule 26).