nx_isosurf_orientation_candidate_t343.nx

nx_isosurf.nx -- ★F0 UNIFY implicit + explicit (from the graphics foundation census): a SURFACE-NETS polygonizer that turns a signed-distance FIELD into a real TRIANGLE MESH. This is the bridge that lets us MESH THE BEING (or any SDF): sample the SDF on a grid, place one vertex per surface-straddling cell (averaged edge crossings), connect the 4 cells around every sign-changing grid edge into a quad. Per-vertex normals come from the SDF GRADIENT (so smooth Gouraud shading is winding-independent). Fills the nx_trimesh buffers -> render with the existing rasterizer. license_tier: ORIGINAL