Casts klass to GtsSplitClass . Casts obj to GtsSplit . Evaluates to TRUE if obj is a GtsSplit . Evaluates to the first vertex of the edge collapsed by vs . Evaluates to the second vertex of the edge collapsed by vs .
Vertex v is the vertex to be split.
Objects v1 and v2 are either GtsSplit or GtsVertex describing the vertices of the edge to be expanded. Together with the current GtsSplit , v1 and v2 define one level of a vertex split tree. If v1 or v2 are both GtsVertex , the current vertex split is a leaf of the tree. Fields cfaces and ncf define an array of GtsSplitCFace describing the faces collapsed by the vertex split. The collapse itself is not performed.