feat(renderer): implement per-polygon fills for 2D shape #7722 #7729
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Description
This PR implements per-polygon coloring support for 2D shape primitives to match WebGL behavior where possible.
Changes
TRIANGLES
TRIANGLE_STRIP
QUADS
QUAD_STRIP
pInst
with direct renderer methodsTesting
Verified rendering behavior matches WebGL output for:
Notes
While we can't achieve perfect WebGL parity (no vertex color interpolation), this provides the closest possible 2D approximation.