nx_nishios_raster.nx

nx_nishios_raster.nx -- GOAL-GPU-NATIVE rung-1: a sovereign SOFTWARE RASTERIZER (seed of the 3D stack). First concrete rung toward native gaming (No Man's Sky-class, the north star): real triangles drawn into the nx_fb framebuffer via EDGE FUNCTIONS (per-pixel inside test), BARYCENTRIC GOURAUD shading (per-vertex colour interpolation), and a Z-BUFFER (per-pixel depth). The z-buffer is what makes it 3D, not 2D: a NEAR triangle must occlude a FAR one regardless of DRAW ORDER. Scene: a far gradient triangle, a near solid-yellow triangle over it, then a far cyan triangle drawn LAST over the near one -- the depth test must REJECT the late far triangle so the near yellow survives. KAT: triangles rasterize (substantial coverage, corner is background); Z-BUFFER correct (every pixel the near triangle owns stays near-yellow even though a far triangle was drawn over it afterward); Gouraud shading produces real colour variation; BMP exported. All integer math, fully sovereign. HONEST SCOPE: flat per-triangle depth + 2D screen-space tris (the raster core); 3D transform/clip/ perspective + a sovereign GPU to run it fast = the rungs above, toward measured-vs-DirectX. No hw writes (Rule 26). expect_exit: 0 license_tier: ORIGINAL