Global Variable

SCNGeometrySourceSemanticColor

The semantic for per-vertex color data.

Declaration

const SCNGeometrySourceSemantic SCNGeometrySourceSemanticColor;

Discussion

For a geometry source, this semantic identifies data containing a color for each vertex in the geometry. SceneKit interpolates per-vertex colors across a surface to produce smooth shading. Per-vertex colors modulate those produced by lighting and a geometry’s materials, if applicable.

For a custom shader program, you use this semantic to bind SceneKit’s vertex color data to an input attribute of the shader.

Vertex color data is typically an array of three- or four-component vectors.

See Also

Advanced Shading Semantics

SCNGeometrySourceSemanticTangent

The semantic for surface tangent vector data.