HoleInfoT.cc 9.82 KB
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/*===========================================================================*\
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 *           Copyright (c) 2001-2015, RWTH-Aachen University                 *
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*                                                                            *
\*===========================================================================*/


#define HOLEINFO_C

#include "HoleInfoT.hh"

#include <MeshTools/MeshSelectionT.hh>

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#include <algorithm>

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/// Constructor
template< class MeshT >
HoleInfo< MeshT >::HoleInfo(MeshT * _mesh)
  : mesh_(_mesh), filler_(0)
{
}

/// Destructor
template< class MeshT >
HoleInfo< MeshT >::~HoleInfo()
{
  if (filler_ != 0)
    delete filler_;
}

/// get all holes and store them internally
template< class MeshT >
void HoleInfo< MeshT >::getHoles()
{

  // Property for the active mesh to mark already visited edges
  OpenMesh::EPropHandleT< bool > boundary_search;

  // Add a property to the mesh to store original vertex positions
  mesh_->add_property( boundary_search, "Boundary search" );

  // Initialize Property
  typename MeshT::EdgeIter e_it, e_end=mesh_->edges_end();
  for (e_it=mesh_->edges_begin(); e_it!=e_end; ++e_it) {
    mesh_->property(  boundary_search , *e_it ) = false;
  }

  holes_.clear();

  for (e_it=mesh_->edges_begin(); e_it!=e_end; ++e_it) {

    // Skip already visited edges
    if ( mesh_->property(  boundary_search , *e_it ) )
      continue;

    // Check only boundary edges
    if ( !mesh_->is_boundary(*e_it))
      continue;

    // Get boundary halfedge
    typename MeshT::HalfedgeHandle hh = mesh_->halfedge_handle( *e_it, 0 );
    if ( ! mesh_->is_boundary( hh ) )
      hh = mesh_->opposite_halfedge_handle( hh );


    typename MeshT::Point center(0,0,0);

    Hole currentHole;

    // Collect boundary edges
    typename MeshT::HalfedgeHandle  ch = hh;
    do {
      currentHole.push_back( mesh_->edge_handle(ch) );

      center += mesh_->point( mesh_->from_vertex_handle(ch) );

      mesh_->property(  boundary_search , mesh_->edge_handle(ch) ) = true;

      //check number of outgoing boundary HEH's at Vertex
      int c = 0;
      typename MeshT::VertexHandle vh = mesh_->to_vertex_handle(ch);

      for ( typename MeshT::VertexOHalfedgeIter voh_it(*mesh_,vh); voh_it.is_valid(); ++voh_it)
        if ( mesh_->is_boundary( *voh_it ) )
          c++;

      if ( c >= 2){
        typename MeshT::HalfedgeHandle  op = mesh_->opposite_halfedge_handle( ch );
        typename MeshT::VertexOHalfedgeIter voh_it(*mesh_,op);

        ch = *(++voh_it);

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      } else
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        ch = mesh_->next_halfedge_handle( ch );

    } while ( ch != hh );


    center /= currentHole.size();

    bool isHole = true;

    int err = 0;

    for (unsigned int i=0; i < currentHole.size(); i++){
      typename MeshT::HalfedgeHandle hh = mesh_->halfedge_handle( currentHole[i], 0 );
      
      if ( ! mesh_->is_boundary( hh ) )
        hh = mesh_->opposite_halfedge_handle( hh );

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      typename MeshT::VertexHandle vh = mesh_->from_vertex_handle(hh);
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      typename MeshT::Normal n = mesh_->normal( vh );
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      typename MeshT::Point p = mesh_->point( vh );
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      if ( (p - center).norm() < (p + n - center).norm()  ){
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//           isHole = false;
//           break;
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        err++;
      }
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    }

//   std::cerr << "Errors " << err << " Size " << hole.count << std::endl; 
    if (isHole)
      holes_.push_back(currentHole);
  }

  mesh_->remove_property( boundary_search);

}

/// fill hole with given index 
template< class MeshT >
void HoleInfo< MeshT >::fillHole(int _index, int _stages)
{

  if ( (uint) _index > holes_.size()){
    std::cerr << "Cannot fill hole. Index invalid." << std::endl;
    return;
  }

  if (filler_ == 0)
    filler_ = new HoleFiller< MeshT >(*mesh_);

  filler_->fill_hole( holes_[_index][0], _stages );

  mesh_->garbage_collection();

  MeshSelection::clearEdgeSelection(mesh_);

  mesh_->update_normals();
}

/// fill hole with given edgeHandle on the boundary 
template< class MeshT >
void HoleInfo< MeshT >::fillHole(typename MeshT::EdgeHandle _eh, int _stages)
{
  if (filler_ == 0)
    filler_ = new HoleFiller< MeshT >(*mesh_);

  filler_->fill_hole( _eh, _stages );

  mesh_->garbage_collection();

  MeshSelection::clearEdgeSelection(mesh_);

  mesh_->update_normals();
}

/// fill all holes of the mesh
template< class MeshT >
void HoleInfo< MeshT >::fillAllHoles(int _stages)
{

  if (filler_ == 0)
    filler_ = new HoleFiller< MeshT >(*mesh_);

  filler_->fill_all_holes( _stages );

}

/// select a hole with given index
template< class MeshT >
void HoleInfo< MeshT >::selectHole(int _index)
{

  if ( (uint) _index > holes_.size()){
    std::cerr << "Cannot select hole. Index invalid." << std::endl;
    return;
  }

  for ( uint i = 0 ; i < (holes_[_index]).size() ; ++i ) {
     mesh_->status( (holes_[_index])[i] ).set_selected(true);
  }

}

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template< class MeshT >
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void HoleInfo< MeshT >::getHolePostitionInfo(const int _index, typename MeshT::Normal& _holeNormal, typename MeshT::Point& _holeCenter) const
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{

  _holeCenter = typename MeshT::Point(0.0,0.0,0.0);
  _holeNormal = typename MeshT::Normal(0.0,0.0,0.0);

  // Center of gravity of hole and an average normal at the hole boundary
  for ( size_t i = 0 ; i <  holes_[_index].size() ; ++i ) {
    const typename MeshT::HalfedgeHandle he = mesh_->halfedge_handle(holes_[_index][i],0);
    const typename MeshT::VertexHandle vh_to = mesh_->to_vertex_handle(he);

    _holeCenter += mesh_->point(vh_to);
    _holeNormal += mesh_->normal(vh_to);
  }

  _holeCenter /= typename MeshT::Scalar(holes_[_index].size());
  _holeNormal /= typename MeshT::Scalar(holes_[_index].size());
  _holeNormal.normalize();

}

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template< class MeshT >
void HoleInfo< MeshT >::getHoleInfo(const unsigned int _index, size_t& _edges, typename MeshT::Scalar& _diagonal, typename MeshT::Scalar& _boundaryLength) const
{

  if ( _index >= holes_.size() ) {
    std::cerr << "Invalid hole index " << _index << std::endl;
    return;
  }

  _boundaryLength = 0.0;

  typename MeshT::Point minCoord = typename MeshT::Point(std::numeric_limits<typename MeshT::Scalar>::max(),std::numeric_limits<typename MeshT::Scalar>::max(),std::numeric_limits<typename MeshT::Scalar>::max());
  typename MeshT::Point maxCoord = typename MeshT::Point(-std::numeric_limits<typename MeshT::Scalar>::max(),-std::numeric_limits<typename MeshT::Scalar>::max(),-std::numeric_limits<typename MeshT::Scalar>::max());

  for (size_t i = 0 ; i < holes_[_index].size() ; ++i) {
    _boundaryLength += mesh_->calc_edge_length(holes_[_index][i]);

    typename MeshT::Point pos = mesh_->point(mesh_->from_vertex_handle(mesh_->halfedge_handle(holes_[_index][i],0)));
    minCoord[0] = std::min(minCoord[0],pos[0]);
    minCoord[1] = std::min(minCoord[1],pos[1]);
    minCoord[2] = std::min(minCoord[2],pos[2]);

    maxCoord[0] = std::max(maxCoord[0],pos[0]);
    maxCoord[1] = std::max(maxCoord[1],pos[1]);
    maxCoord[2] = std::max(maxCoord[2],pos[2]);
  }

  _edges = holes_[_index].size();
  _diagonal = (maxCoord - minCoord).length();

}

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/// get the holes vector
template< class MeshT >
std::vector< std::vector< typename MeshT::EdgeHandle > >* HoleInfo< MeshT >::holes()
{
  return &holes_;
}