First checkin for OpenMesh 2.0

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

Doc/Tutorial/05-std_properties/properties.cc

@@ -0,0 +1,71 @@
+#include <iostream>
+// --------------------
+#include <OpenMesh/Core/IO/MeshIO.hh>
+#include <OpenMesh/Core/Mesh/TriMesh_ArrayKernelT.hh>
+
+
+typedef OpenMesh::TriMesh_ArrayKernelT<>  MyMesh;
+
+
+int main(int argc, char **argv)
+{
+  MyMesh  mesh;
+
+  if (argc!=2)
+  {
+    std::cerr << "Usage: " << argv[0] << " <input>\n";
+    return 1;
+  }
+
+  // request vertex normals, so the mesh reader can use normal information
+  // if available
+  mesh.request_vertex_normals();
+
+  // assure we have vertex normals
+  if (!mesh.has_vertex_normals())
+  {
+    std::cerr << "ERROR: Standard vertex property 'Normals' not available!\n";
+    return 1;
+  }
+
+  OpenMesh::IO::Options opt;
+  if ( ! OpenMesh::IO::read_mesh(mesh,argv[1], opt))
+  {
+    std::cerr << "Error loading mesh from file " << argv[1] << std::endl;
+    return 1;
+  }
+
+  // If the file did not provide vertex normals, then calculate them
+  if ( !opt.check( OpenMesh::IO::Options::VertexNormal ) )
+  {
+    // we need face normals to update the vertex normals
+    mesh.request_face_normals();
+
+    // let the mesh update the normals
+    mesh.update_normals();
+
+    // dispose the face normals, as we don't need them anymore
+    mesh.release_face_normals();
+  }
+
+  // move all vertices one unit length along it's normal direction
+  for (MyMesh::VertexIter v_it = mesh.vertices_begin();
+       v_it != mesh.vertices_end(); ++v_it)
+  {
+    std::cout << "Vertex #" << v_it << ": " << mesh.point( v_it );
+    mesh.set_point( v_it, mesh.point(v_it)+mesh.normal(v_it) );
+    std::cout << " moved to " << mesh.point( v_it ) << std::endl;
+  }
+
+  // don't need the normals anymore? Remove them!
+  mesh.release_vertex_normals();
+
+  // just check if it really works
+  if (mesh.has_vertex_normals())
+  {
+    std::cerr << "Ouch! ERROR! Shouldn't have any vertex normals anymore!\n";
+    return 1;
+  }
+
+  return 0;
+}