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Merge pull request #2100 from janetournois/PMP-fix_isotropic_remeshing_patch_corners-jtournois 

PMP : fix isotropic remeshing of a selection
This commit is contained in:
Laurent Rineau 2017-05-19 10:27:09 +02:00
parent db8732b10a ce51fef0d5
commit dfd77d4aff
1 changed files with 40 additions and 0 deletions
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40
Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/internal/Isotropic_remeshing/remesh_impl.h
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@ -48,6 +48,7 @@
#include <boost/unordered_map.hpp>
#include <boost/unordered_set.hpp>
#include <boost/shared_ptr.hpp>
#include <boost/container/flat_set.hpp>
#include <map>
#include <list>
@ -303,6 +304,8 @@ namespace internal {
{
tag_halfedges_status(face_range); //called first
constrain_patch_corners(face_range);
BOOST_FOREACH(face_descriptor f, face_range)
{
input_triangles_.push_back(triangle(f));
@ -1372,6 +1375,43 @@ private:
return PMP::compute_face_normal(f, mesh_);
}
template <typename FaceRange>
void constrain_patch_corners(const FaceRange& face_range)
{
boost::container::flat_set<vertex_descriptor> visited;
BOOST_FOREACH(face_descriptor f, face_range)
{
BOOST_FOREACH(halfedge_descriptor h,
halfedges_around_face(halfedge(f, mesh_), mesh_))
{
vertex_descriptor vt = target(h, mesh_);
//treat target(h, mesh_)
if (visited.find(vt) != visited.end())
continue;//already treated
if (status(h) == PATCH)//h not on patch boundary
continue; //so neither is target(h, mesh_)
//count incident MESH_BORDER edges
unsigned int nb_incident_borders = 0;
BOOST_FOREACH(halfedge_descriptor hv,
halfedges_around_target(h, mesh_))
{
CGAL_assertion(vt == target(hv, mesh_));
if ( (status(hv) == PATCH_BORDER && status(opposite(hv, mesh_)) == MESH_BORDER)
|| (status(hv) == MESH_BORDER && status(opposite(hv, mesh_)) == PATCH_BORDER))
nb_incident_borders++;
}
if (nb_incident_borders == 1) //this is a special corner
set_constrained(vt, true);
visited.insert(vt);
}
}
}
template<typename FaceRange>
void tag_halfedges_status(const FaceRange& face_range)
{