/**
* Element Groups are used to associate faces that share UV seams. In this
* way, we can easily select UV shells by grouping all elements as opposed
* to iterating through and checking nearby faces every time.
*/
private void RefreshElementGroups(pb_Object pb)
{
foreach(pb_Face f in pb.faces)
f.elementGroup = -1;
pb_IntArray[] sharedUVs = pb.sharedIndicesUV;
int eg = 0;
foreach(pb_IntArray pint in sharedUVs)
{
if(pint.array.Length < 2) continue;
pb_Face[] faces = GetFaces(pb, pint);
int cur = pb.UnusedElementGroup(eg++);
foreach(pb_Face f in faces)
{
if(f.elementGroup > -1)
{
int g = f.elementGroup;
foreach(pb_Face fin in pb.faces)
if(fin.elementGroup == g)
fin.elementGroup = cur;
}
f.elementGroup = cur;
}
}
}
