The index at which the point will be inserted. Must be less or equal than Coords.Count. If the index is less than zero, the point will be added to end of the Coords list.
The index at which the point will be inserted. Must be less or equal than Coords.Count. If the index is less than zero, the point will be added to end of the Coords list.
If this patch has attributes Ms or IDs, then the attributes will be inserted also. M and ID will be taken from the point if it has them. Otherwise, default values will be inserted. Similarly, if this patch has attributes TextureCoords2D or Normals, then default values will be inserted. The default value is (0, 0) for 2D texture coordinates and (0, 0, 1) for normals.