Call TriangleFunc for each mesh TriangleID included in MeshSelection. TriangleFunc may be called multiple times for the same TriangleID. This will forward toEnumerateTriangleSelectionTriangles()orEnumeratePolygroupSelectionTriangles()depending on the selection topology type. If UseGroupSet and MeshSelection is for polygroups, the default Mesh group layer will be used.