Interface RepaintHeatMapColorParams

Output buffer to repaint. Mutated in place; alpha is restored to 255 on every pixel. Width / height define the texture size.

Triangle indices (length divisible by 3).

Per-vertex scalar field, length = vertexCount.

Per-vertex UVs in [0, 1]², length 2 × vertexCount. Same shape paintHeatMap emits — typically copied straight from SceneGeometry.uvsCompressed after the initial paint.