First checkin for OpenMesh 2.0

git-svn-id: http://www.openmesh.org/svnrepo/OpenMesh/trunk@2 fdac6126-5c0c-442c-9429-916003d36597

Tools/Decimater/ModQuadricT.hh

@@ -0,0 +1,178 @@
+//=============================================================================
+//
+//                               OpenMesh
+//        Copyright (C) 2003 by Computer Graphics Group, RWTH Aachen
+//                           www.openmesh.org
+//
+//-----------------------------------------------------------------------------
+//
+//                                License
+//
+//   This library 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, version 2.
+//
+//   This library 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 Lesser General Public 
+//   License along with this library; if not, write to the Free Software
+//   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+//
+//-----------------------------------------------------------------------------
+//
+//   $Revision: 1802 $
+//   $Date: 2008-05-19 11:55:07 +0200 (Mo, 19. Mai 2008) $
+//
+//=============================================================================
+
+
+//=============================================================================
+//
+//  CLASS ModQuadricT
+//
+//=============================================================================
+
+#ifndef OSG_MODQUADRIC_HH
+#define OSG_MODQUADRIC_HH
+
+
+//== INCLUDES =================================================================
+
+#include <float.h>
+#include <OpenMesh/Tools/Decimater/ModBaseT.hh>
+#include <OpenMesh/Core/Utils/Property.hh>
+#include <OpenMesh/Core/Utils/vector_cast.hh>
+#include <OpenMesh/Core/Geometry/QuadricT.hh>
+
+
+//== NAMESPACE ================================================================
+
+namespace OpenMesh  {
+namespace Decimater {
+
+
+//== CLASS DEFINITION =========================================================
+
+
+/** Mesh decimation module computing collapse priority based on error quadrics.
+ *
+ *  This module can be used as a binary and non-binary module.
+ */
+template <class DecimaterType>
+class ModQuadricT : public ModBaseT<DecimaterType>
+{
+public:
+
+  // Defines the types Self, Handle, Base, Mesh, and CollapseInfo
+  // and the memberfunction name()
+  DECIMATING_MODULE( ModQuadricT, DecimaterType, Quadric );
+
+public:
+
+  /** Constructor
+   *  \internal
+   */
+  ModQuadricT( DecimaterType &_dec )
+    : Base(_dec, false)
+  {
+    unset_max_err();
+    Base::mesh().add_property( quadrics_ );
+  }
+
+
+  /// Destructor
+  virtual ~ModQuadricT()
+  {
+    Base::mesh().remove_property(quadrics_);
+  }
+
+
+public: // inherited
+
+  /// Initalize the module and prepare the mesh for decimation.
+  virtual void initialize(void);
+
+  /** Compute collapse priority based on error quadrics.
+   *
+   *  \see ModBaseT::collapse_priority() for return values
+   *  \see set_max_err()
+   */
+  virtual float collapse_priority(const CollapseInfo& _ci)
+  {
+    using namespace OpenMesh;
+
+    typedef Geometry::QuadricT<double> Q;
+
+    Q q = Base::mesh().property(quadrics_, _ci.v0);
+    q += Base::mesh().property(quadrics_, _ci.v1);
+
+    double err = q(_ci.p1);
+
+    //min_ = std::min(err, min_);
+    //max_ = std::max(err, max_);
+
+    //double err = q( p );
+
+    return float( (err < max_err_) ? err : float( Base::ILLEGAL_COLLAPSE ) );
+  }
+
+
+  /// Post-process halfedge collapse (accumulate quadrics)
+  virtual void postprocess_collapse(const CollapseInfo& _ci)
+  {
+    Base::mesh().property(quadrics_, _ci.v1) +=
+      Base::mesh().property(quadrics_, _ci.v0);
+  }
+
+
+
+public: // specific methods
+
+  /** Set maximum quadric error constraint and enable binary mode.
+   *  \param _err    Maximum error allowed
+   *  \param _binary Let the module work in non-binary mode in spite of the
+   *                 enabled constraint.
+   *  \see unset_max_err()
+   */
+  void set_max_err(double _err, bool _binary=true)
+  {
+    max_err_ = _err;
+    Base::set_binary(_binary);
+  }
+
+  /// Unset maximum quadric error constraint and restore non-binary mode.
+  /// \see set_max_err()
+  void unset_max_err(void)
+  {
+    max_err_ = DBL_MAX;
+    Base::set_binary(false);
+  }
+
+  /// Return value of max. allowed error.
+  double max_err() const { return max_err_; }
+
+
+private:
+
+  // maximum quadric error
+  double max_err_;
+
+  // this vertex property stores a quadric for each vertex
+  VPropHandleT< Geometry::QuadricT<double> >  quadrics_;
+};
+
+//=============================================================================
+} // END_NS_DECIMATER
+} // END_NS_OPENMESH
+//=============================================================================
+#if defined(OM_INCLUDE_TEMPLATES) && !defined(OPENMESH_DECIMATER_MODQUADRIC_CC)
+#define OSG_MODQUADRIC_TEMPLATES
+#include "ModQuadricT.cc"
+#endif
+//=============================================================================
+#endif // OSG_MODQUADRIC_HH defined
+//=============================================================================
+