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Added longest edge split subdivider

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git-svn-id: http://www.openmesh.org/svnrepo/OpenMesh/trunk@522 fdac6126-5c0c-442c-9429-916003d36597
This commit is contained in:
Jan Möbius
2012-01-23 12:28:10 +00:00
parent 073e6c88c7
commit 73c364a4c0
2 changed files with 221 additions and 0 deletions
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src/OpenMesh/Tools/Subdivider/Uniform/LongestEdgeT.hh Normal file
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/*===========================================================================*\
* *
* OpenMesh *
* Copyright (C) 2001-2011 by Computer Graphics Group, RWTH Aachen *
* www.openmesh.org *
* *
*---------------------------------------------------------------------------*
* This file is part of OpenMesh. *
* *
* OpenMesh is free software: you can redistribute it and/or modify *
* it under the terms of the GNU Lesser General Public License as *
* published by the Free Software Foundation, either version 3 of *
* the License, or (at your option) any later version with the *
* following exceptions: *
* *
* If other files instantiate templates or use macros *
* or inline functions from this file, or you compile this file and *
* link it with other files to produce an executable, this file does *
* not by itself cause the resulting executable to be covered by the *
* GNU Lesser General Public License. This exception does not however *
* invalidate any other reasons why the executable file might be *
* covered by the GNU Lesser General Public License. *
* *
* OpenMesh is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU LesserGeneral Public *
* License along with OpenMesh. If not, *
* see <http://www.gnu.org/licenses/>. *
* *
\*==========================================================================*/
/*==========================================================================*\
* *
* $Revision: 410 $ *
* $Date: 2010-06-17 12:45:58 +0200 (Do, 17. Jun 2010) $ *
* *
\*==========================================================================*/
/** \file LongestEdgeT.hh
*/
//=============================================================================
//
// CLASS LongestEdgeT
//
//=============================================================================
#ifndef LINEAR_H
#define LINEAR_H
#include <OpenMesh/Tools/Subdivider/Uniform/SubdividerT.hh>
#include <OpenMesh/Core/Utils/vector_cast.hh>
#include <OpenMesh/Core/Utils/Property.hh>
// -------------------- STL
#include <vector>
#include <queue>
#if defined(OM_CC_MIPS)
# include <math.h>
#else
# include <cmath>
#endif
//== NAMESPACE ================================================================
namespace OpenMesh { // BEGIN_NS_OPENMESH
namespace Subdivider { // BEGIN_NS_DECIMATER
namespace Uniform { // BEGIN_NS_UNIFORM
//== CLASS DEFINITION =========================================================
template <typename MeshType, typename RealType = float>
class CompareLengthFunction {
public:
bool operator()( const std::pair< typename MeshType::EdgeHandle, RealType >& t1, const std::pair< typename MeshType::EdgeHandle, RealType >& t2) // Returns true if t1 is earlier than t2
{
if (t1.second < t2.second)
return true;
else
return false;
}
};
/** %Uniform LongestEdgeT subdivision algorithm
*
* Very simple algorithm splitting all edges which are longer than given via
* set_max_edge_length(). The split is always performed on the longest
* edge in the mesh.
*/
template <typename MeshType, typename RealType = float>
class LongestEdgeT : public SubdividerT<MeshType, RealType>
{
public:
typedef RealType real_t;
typedef MeshType mesh_t;
typedef SubdividerT< mesh_t, real_t > parent_t;
typedef std::vector< std::vector<real_t> > weights_t;
typedef std::vector<real_t> weight_t;
public:
LongestEdgeT() : parent_t()
{ }
LongestEdgeT( mesh_t& _m) : parent_t(_m)
{ }
~LongestEdgeT() {}
public:
const char *name() const { return "Longest Edge Split"; }
void set_max_edge_length(double _value) {
max_edge_length_squared_ = _value * _value;
}
protected:
bool prepare( mesh_t& _m )
{
return true;
}
bool cleanup( mesh_t& _m )
{
return true;
}
bool subdivide( MeshType& _m, size_t _n , const bool _update_points = true)
{
std::cerr << "Longest" << std::endl;
typedef std::pair< typename mesh_t::EdgeHandle, real_t > queueElement;
// Sorted queue containing all edges sorted by their decreasing length
std::priority_queue< queueElement, std::vector< queueElement > , CompareLengthFunction< typename mesh_t::EdgeHandle, real_t > > queue;
// Build the initial queue
// First element should be longest edge
typename mesh_t::EdgeIter edgesEnd = _m.edges_end();
for ( typename mesh_t::EdgeIter eit = _m.edges_begin(); eit != edgesEnd; ++eit) {
const typename MeshType::Point to = _m.point(_m.to_vertex_handle(_m.halfedge_handle(eit,0)));
const typename MeshType::Point from = _m.point(_m.from_vertex_handle(_m.halfedge_handle(eit,0)));
real_t length = (to - from).sqrnorm();
// Only push the edges that need to be split
if ( length > max_edge_length_squared_ )
queue.push( queueElement(eit.handle(),length) );
}
bool stop = false;
while ( !stop && ! queue.empty() ) {
queueElement a = queue.top();
queue.pop();
if ( a.second < max_edge_length_squared_ ) {
stop = true;
break;
} else {
const typename MeshType::Point to = _m.point(_m.to_vertex_handle(_m.halfedge_handle(a.first,0)));
const typename MeshType::Point from = _m.point(_m.from_vertex_handle(_m.halfedge_handle(a.first,0)));
const typename MeshType::Point midpoint = 0.5 * ( to + from );
const typename MeshType::VertexHandle newVertex = _m.add_vertex(midpoint);
_m.split(a.first,newVertex);
for ( typename MeshType::VertexOHalfedgeIter voh_it(_m,newVertex); voh_it; ++voh_it) {
typename MeshType::EdgeHandle eh = _m.edge_handle(voh_it.handle());
const typename MeshType::Point to = _m.point(_m.to_vertex_handle(voh_it));
const typename MeshType::Point from = _m.point(_m.from_vertex_handle(voh_it));
real_t length = (to - from).sqrnorm();
// Only push the edges that need to be split
if ( length > max_edge_length_squared_ )
queue.push( queueElement(eh,length) );
}
}
}
#if defined(_DEBUG) || defined(DEBUG)
// Now we have an consistent mesh!
assert( OpenMesh::Utils::MeshCheckerT<mesh_t>(_m).check() );
#endif
return true;
}
private: // data
real_t max_edge_length_squared_;
};
} // END_NS_UNIFORM
} // END_NS_SUBDIVIDER
} // END_NS_OPENMESH
#endif