nx_raster3d.nx

nx_raster3d.nx -- GATE: the SOVEREIGN INTEGER-DETERMINISTIC 3D PIPELINE (closes the GRAPHICS-API "3D pipeline" gap -- the LAST software OS gap). Extends nx_raster (2D edge-function fill) to a real 3D renderer, 100% integer/ fixed-point => BIT-EXACT on ANY CPU (x86/RISC-V/no-FPU), NO GPU/driver. Stages: (1) TRANSFORM -- fixed-point (Q8) rotate-around-Y + translate (model->view). (2) PROJECT -- perspective projection: screen = center + focal*coord / view_z (the divide-by-z that makes 3D). (3) Z-BUFFER -- per-pixel depth test (barycentric-interpolated view-z); nearer occludes farther = hidden-surface removal, the defining 3D feature. (4) SHADE -- integer flat Lambert: intensity = dot(faceNormal, light) normalized by integer isqrt. T1 projection KAT (a view point projects to the exact screen pixel). T2 Z-BUFFER occlusion is ORDER-INDEPENDENT (near occludes far whether drawn near-first or far-first). T3 full pipeline renders a tetrahedron (transform->project->z-buffer); a real image, front faces occlude back. T4 (EXCEED) determinism -- render twice -> BIT-IDENTICAL framebuffer + z-buffer checksum. T5 flat-shading KAT (normal-toward-light=full, perpendicular=dark) + bounds (no OOB writes). expect_exit: 0 Sovereign: nx_syscalls. NEVER-BRICK: software render, writes 0 GPU firmware.