- add FPolygroupLayer struct which is basically an identifier for a Polygroup layer, ie either the default mesh layer or one of the extended attribute layers
- add FPolygroupsGenerator::FindPolygroupsFromHardNormalSeams()
- add option to FPolygroupsGenerator::FindPolygroupsFromFurthestPointSampling() to constrain generation relative to an input polygroup set, ie only subdivide existing polygroups
- FMeshRegionGraph::BuildFromComponents now takes optional are-triangles-connected predicate, to allow links in graph to be disabled
- FPatchBasedMeshUVGenerator can now optionally generate new UV islands relative to an input Polygoup set, via new GroupConstraint input
#rb david.hill
#rnx
#jira none
#preflight 6142106e568b3a0001dbc2d0
[CL 17522255 by Ryan Schmidt in ue5-main branch]