gluTessVertex
Defines a vertex for tessellation processing in the GLU tessellator. This method specifies a vertex using its coordinates and associates custom data with the vertex. The vertex will be processed as part of the tessellation operation.
Parameters
coords
A double array containing the x, y, and z coordinates of the vertex. This array must have at least three elements.
coords_offset
The starting index within the coords
array where the vertex coordinates are located.
vertexData
An optional user-defined object representing custom data associated with the vertex. This data can be referenced in tessellation callbacks.