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[marcosscriven <>]

Unfortunately, NP3.snc() and NP3.pl() are protected scope. 

SNC_io_parser.h can only access it for its stream operations because it's
marked as a friend.

Can you see any downside to me patching snc/pl to be public, so that I can
do this:

  for(i=0; i<vn; ++i)  Vertex_of.push_back(this->sncp()->new_vertex_only());
  for(i=0; i<en; ++i)  Edge_of.push_back(this->sncp()->new_halfedge_only());
  for(i=0; i<fn; ++i) 
Halffacet_of.push_back(this->sncp()->new_halffacet_only());
  for(i=0; i<cn; ++i)  Volume_of.push_back(this->sncp()->new_volume_only());
  for(i=0; i<sen; ++i)
SEdge_of.push_back(this->sncp()->new_shalfedge_only());
  for(i=0; i<sln; ++i)
SLoop_of.push_back(this->sncp()->new_shalfloop_only());
  for(i=0; i<sfn; ++i) SFace_of.push_back(this->sncp()->new_sface_only());

And then this:

  NP.pl()->initialize(&NP.snc());

Where instead of populating vn, en, fn... etc from a stream, I populate it
by doing a directory copy from the in memory NP3 I want to copy?

Please also see me query about allocators, as I'm not entirely sure the
above would be necessary, if somehow I could have an allocator that used an
offset pointer.

Marcos



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