Cause: std::vector.resize() function invalidates Vtr::Level pointers held by FVarLevel
Fix: switch std::vector<Vtr::Level> to std::vector<Vtr::Level *> and cycle through
the vector with appropriate new/delete.
Catmull-Clark Subdivision Surfaces", Niessner et al, Eurographics 2012.
This change includes;
-topology identification for single-crease patch during adaptive refinement.
-patch array population (similar to boundary)
-sharpness buffer generation
-glsl shader
Eval stuffs will be coming.
- removed old alternative to Catmark feature adaptive selection
- removed unused methods from Vtr::SparseSelector
- made use of Level::VTag's new "incomplete" member in both
Sync'ing the 'dev' branch with the 'feature_3.0dev' branch at commit 68c6d11fc36761ae1a5e6cdc3457be16f2e9704a
The branch 'feature_3.0dev' is now locked and preserved for historical purposes.
