New Decimater mods:

EdgeLength
  Hausdorff distance
  Normal Deviation



git-svn-id: http://www.openmesh.org/svnrepo/OpenMesh/trunk@450 fdac6126-5c0c-442c-9429-916003d36597

src/OpenMesh/Tools/Decimater/ModEdgeLengthT.cc

@@ -0,0 +1,99 @@
+/*===========================================================================*\
+ *                                                                           *
+ *                               OpenMesh                                    *
+ *      Copyright (C) 2001-2011 by Computer Graphics Group, RWTH Aachen      *
+ *                           www.openmesh.org                                *
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+ *  This file is part of OpenMesh.                                           *
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+ *  OpenMesh is free software: you can redistribute it and/or modify         *
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+ *  If other files instantiate templates or use macros                       *
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+ *  not by itself cause the resulting executable to be covered by the        *
+ *  GNU Lesser General Public License. This exception does not however       *
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+\*===========================================================================*/
+
+/*===========================================================================*\
+ *                                                                           *
+ *   $Revision: 448 $                                                        *
+ *   $Date: 2011-11-04 13:59:37 +0100 (Fri, 04 Nov 2011) $                   *
+ *                                                                           *
+\*===========================================================================*/
+
+/** \file ModEdgeLengthT.cc
+ */
+
+
+//=============================================================================
+//
+//  CLASS ModEdgeLengthT - IMPLEMENTATION
+//
+//=============================================================================
+
+#define MB_MODEDGELENGTHT_C
+
+
+//== INCLUDES =================================================================
+
+#include "ModEdgeLengthT.hh"
+#include <ACG/Geometry/Algorithms.hh>
+
+
+//== NAMESPACES ===============================================================
+
+namespace OpenMesh  {
+namespace Decimater {
+
+
+//== IMPLEMENTATION ==========================================================
+
+
+template <class DecimaterT>
+ModEdgeLengthT<DecimaterT>::
+ModEdgeLengthT(DecimaterT &_dec, float _edge_length, bool _is_binary)
+  : Base(_dec, _is_binary),
+    mesh_(Base::mesh())
+{
+  set_edge_length(_edge_length);
+}
+
+
+//-----------------------------------------------------------------------------
+
+
+template <class DecimaterT>
+float
+ModEdgeLengthT<DecimaterT>::
+collapse_priority(const CollapseInfo& _ci)
+{
+  typename Mesh::Scalar sqr_length = (_ci.p0 - _ci.p1).sqrnorm();
+
+  return ((sqr_length <= sqr_edge_length_) ? 
+           sqr_length :
+           float( Base::ILLEGAL_COLLAPSE ));
+}
+
+
+//=============================================================================
+}
+}
+//=============================================================================