Added Decimater Mod AspectRatio.

git-svn-id: http://www.openmesh.org/svnrepo/OpenMesh/trunk@457 fdac6126-5c0c-442c-9429-916003d36597

src/OpenMesh/Tools/Decimater/ModAspectRatioT.hh

@@ -0,0 +1,143 @@
+/*===========================================================================*\
+ *                                                                           *
+ *                               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           *
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+ *  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: 448 $                                                        *
+ *   $Date: 2011-11-04 13:59:37 +0100 (Fri, 04 Nov 2011) $                   *
+ *                                                                           *
+\*===========================================================================*/
+
+/** \file ModAspectRatioT.hh
+ */
+
+
+//=============================================================================
+//
+//  CLASS ModAspectRatioT
+//
+//=============================================================================
+
+
+#ifndef MODASPECTRATIOT_HH
+#define MODASPECTRATIOT_HH
+
+
+//== INCLUDES =================================================================
+
+#include <OpenMesh/Tools/Decimater/ModBaseT.hh>
+#include <OpenMesh/Core/Utils/Property.hh>
+
+
+//== NAMESPACES ===============================================================
+
+namespace OpenMesh  {
+namespace Decimater {
+
+
+//== CLASS DEFINITION =========================================================
+
+
+template <class DecimaterT>
+class ModAspectRatioT : public ModBaseT<DecimaterT>
+{
+public:
+   
+  DECIMATING_MODULE( ModAspectRatioT, DecimaterT, Roundness );
+
+  typedef typename Mesh::Scalar      Scalar;
+  typedef typename Mesh::Point       Point;
+
+  // constructor
+  ModAspectRatioT(DecimaterT&  _dec,
+		float        _min_roundness = 5.0,
+		bool         _is_binary = true)
+    : Base(_dec, _is_binary),
+      mesh_(Base::mesh()),
+      min_roundness_(1.0/_min_roundness)
+  {
+    mesh_.add_property( roundness_ );
+  }
+
+
+  // destructor
+  ~ModAspectRatioT()
+  {
+    mesh_.remove_property( roundness_ );
+  }
+
+  
+
+  /// get roundness
+  float roundness() const { return 1.0/min_roundness_; }
+  /// set roundness
+  void set_roundness(float _f) { min_roundness_ = 1.0/_f; }
+  
+  // precompute face roundness
+  void initialize();
+  // blabla
+  float collapse_priority(const CollapseInfo& _ci);
+  // update roundness of one-ring
+  void preprocess_collapse(const CollapseInfo& _ci);
+
+
+private:
+
+  /** \brief return aspect ratio (length/height) of triangle
+  *
+  */
+  Scalar aspectRatio( const Point& _v0,
+                      const Point& _v1,
+                      const Point& _v2 );
+
+private:
+
+  Mesh&  mesh_;
+  float  min_roundness_;
+  FPropHandleT<float>  roundness_;
+};
+
+
+//=============================================================================
+} // END_NS_DECIMATER
+} // END_NS_OPENMESH
+//=============================================================================
+#if defined(INCLUDE_TEMPLATES) && !defined(MB_MODASPECTRATIOT_C)
+#define MODASPECTRATIOT_TEMPLATES
+#include "ModAspectRatioT.cc"
+#endif
+//=============================================================================
+#endif // MB_MODASPECTRATIOT_HH defined
+//=============================================================================
+