public PolySet StitchIdentifiedPolys(PolySet polys)
{
PolySet stichedPolys = new PolySet();
var edgeSet = polys.GenerateEdgeSet();
var originalVerts = edgeSet.GetUniqueVertices();
var newVerts = CloneVertices(originalVerts);
edgeSet.Split(originalVerts, newVerts);
foreach (Edge edge in edgeSet)
{
// Create new polys along the stitched edge.
var stitch_poly1 = new Polygon(edge.m_OuterVerts[0],
edge.m_OuterVerts[1],
edge.m_InnerVerts[0]);
var stitch_poly2 = new Polygon(edge.m_OuterVerts[1],
edge.m_InnerVerts[1],
edge.m_InnerVerts[0]);
// Add the new stitched faces as neighbors to the original Polys.
edge.m_InnerPoly.ReplaceNeighbor(edge.m_OuterPoly, stitch_poly2);
edge.m_OuterPoly.ReplaceNeighbor(edge.m_InnerPoly, stitch_poly1);
m_Polygons.Add(stitch_poly1);
m_Polygons.Add(stitch_poly2);
stichedPolys.Add(stitch_poly1);
stichedPolys.Add(stitch_poly2);
}
//Vertices on inner polys are swapped.
foreach (Polygon poly in polys)
{
for (int i = 0; i < 3; i++)
{
int vert_id = poly.m_Vertices[i];
if (!originalVerts.Contains(vert_id))
{
continue;
}
int vert_index = originalVerts.IndexOf(vert_id);
poly.m_Vertices[i] = newVerts[vert_index];
}
}
return(stichedPolys);
}