FEdgeSplitInfo

struct FEdgeSplitInfo
{
	int OriginalEdge;					// the edge that was split
	FIndex2i OriginalVertices;			// original edge vertices [a,b]
	FIndex2i OtherVertices;				// original opposing vertices [c,d] - d is InvalidID for boundary edges
	FIndex2i OriginalTriangles;			// original edge triangles [t0,t1]
	bool bIsBoundary;					// was the split edge a boundary edge?  (redundant)
 
	int NewVertex;						// new vertex f that was created
	FIndex2i NewTriangles;				// new triangles [t2,t3], oriented as explained in SplitEdge() header comment
	FIndex3i NewEdges;					// new edges are [f,b], [f,c] and [f,d] if this is not a boundary edge
 
	double SplitT;						// parameter value for NewVertex along original edge
};