Global Variable


The semantic for vertex position data.


const SCNGeometrySourceSemantic SCNGeometrySourceSemanticVertex;


For a geometry source, this semantic identifies data containing the positions of each vertex in the geometry. If you create a custom geometry using the geometryWithSources:elements: method, you must provide a geometry source for this semantic.

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

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

See Also

Basic Geometry Semantics


The semantic for surface normal data.


The semantic for texture coordinate data.