Defines whether the input pointer of a vertex input stream is advanced
'per vertex' or 'per instance'. The default step-func is
SG_VERTEXSTEP_PER_VERTEX. SG_VERTEXSTEP_PER_INSTANCE is used with
instanced-rendering.
The vertex-step is part of the vertex-layout definition
when creating pipeline objects
sg_vertex_step
Defines whether the input pointer of a vertex input stream is advanced 'per vertex' or 'per instance'. The default step-func is SG_VERTEXSTEP_PER_VERTEX. SG_VERTEXSTEP_PER_INSTANCE is used with instanced-rendering.
The vertex-step is part of the vertex-layout definition when creating pipeline objects