First checkin for OpenMesh 2.0

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

Doc/Tutorial/04-stl_algorithms/smooth_algo.hh

@@ -0,0 +1,106 @@
+#include <algorithm>
+#include <OpenMesh/Core/Utils/Property.hh>
+
+#ifndef DOXY_IGNORE_THIS
+
+template <class Mesh> class SmootherT
+{
+public:
+
+  typedef typename Mesh::Point            cog_t;
+  typedef OpenMesh::VPropHandleT< cog_t > Property_cog;
+
+public:
+
+  // construct with a given mesh
+  SmootherT(Mesh& _mesh) 
+    : mesh_(_mesh)
+  { 
+    mesh_.add_property( cog_ );
+  }
+
+  ~SmootherT()
+  {
+    mesh_.remove_property( cog_ );
+  }
+
+  // smooth mesh _iterations times
+  void smooth(unsigned int _iterations)
+  {
+    for (unsigned int i=0; i < _iterations; ++i)
+    {
+      std::for_each(mesh_.vertices_begin(), 
+		    mesh_.vertices_end(), 
+		    ComputeCOG(mesh_, cog_));
+
+      std::for_each(mesh_.vertices_begin(), 
+		    mesh_.vertices_end(), 
+		    SetCOG(mesh_, cog_));
+    }
+  }
+
+
+private:
+
+
+  //--- private classes ---
+
+  class ComputeCOG
+  {
+  public:
+    ComputeCOG(Mesh& _mesh, Property_cog& _cog) 
+      : mesh_(_mesh), cog_(_cog)
+    {}
+
+    void operator()(typename Mesh::Vertex& _v)
+    {
+      typename Mesh::VertexHandle      vh( mesh_.handle(_v) );
+      typename Mesh::VertexVertexIter  vv_it;
+      typename Mesh::Scalar            valence(0.0);
+    
+      mesh_.property(cog_, vh) = typename Mesh::Point(0.0, 0.0, 0.0);
+
+      for (vv_it=mesh_.vv_iter(vh); vv_it; ++vv_it)
+      {
+	mesh_.property(cog_, vh) += mesh_.point( vv_it );
+	++valence;
+      }
+
+      mesh_.property(cog_, mesh_.handle(_v) ) /= valence;
+    }
+
+  private:
+    Mesh&         mesh_;
+    Property_cog& cog_;
+  };
+
+
+  class SetCOG
+  {
+  public:
+    SetCOG(Mesh& _mesh, Property_cog& _cog) 
+      : mesh_(_mesh), cog_(_cog)
+    {}
+
+    void operator()(typename Mesh::Vertex& _v)
+    {
+      typename Mesh::VertexHandle vh(mesh_.handle(_v));
+
+      if (!mesh_.is_boundary(vh))
+	mesh_.set_point( vh, mesh_.property(cog_, vh) );
+    }
+
+  private:
+
+    Mesh&         mesh_;
+    Property_cog& cog_;
+  };
+
+
+  //--- private elements ---
+
+  Mesh&        mesh_;
+  Property_cog cog_;
+};
+
+#endif