bfc96ee8ad
git-svn-id: http://www.openmesh.org/svnrepo/OpenMesh/trunk@156 fdac6126-5c0c-442c-9429-916003d36597
170 lines
6.2 KiB
C++
170 lines
6.2 KiB
C++
//=============================================================================
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//
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// OpenMesh
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// Copyright (C) 2001-2005 by Computer Graphics Group, RWTH Aachen
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// www.openmesh.org
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//
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//-----------------------------------------------------------------------------
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//
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// License
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//
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// This library is free software; you can redistribute it and/or modify it
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// under the terms of the GNU Library General Public License as published
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// by the Free Software Foundation, version 2.
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//
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// This library is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Library General Public License for more details.
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//
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// You should have received a copy of the GNU Library General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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//
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//-----------------------------------------------------------------------------
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//
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// $Revision: 83 $
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// $Date: 2009-02-27 17:31:45 +0100 (Fri, 27 Feb 2009) $
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//
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//=============================================================================
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#include <iostream>
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// -------------------- OpenMesh
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#include <OpenMesh/Core/IO/MeshIO.hh>
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#include <OpenMesh/Core/Mesh/PolyMesh_ArrayKernelT.hh>
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#include <OpenMesh/Core/System/config.h>
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#include <OpenMesh/Core/Mesh/Status.hh>
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// ----------------------------------------------------------------------------
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struct MyTraits : public OpenMesh::DefaultTraits
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{
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VertexAttributes(OpenMesh::Attributes::Status);
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FaceAttributes(OpenMesh::Attributes::Status);
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EdgeAttributes(OpenMesh::Attributes::Status);
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};
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typedef OpenMesh::PolyMesh_ArrayKernelT<MyTraits> MyMesh;
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// ----------------------------------------------------------------------------
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// Build a simple cube and delete it except one face
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int main()
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{
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MyMesh mesh;
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// generate vertices
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MyMesh::VertexHandle vhandle[8];
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MyMesh::FaceHandle fhandle[6];
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vhandle[0] = mesh.add_vertex(MyMesh::Point(-1, -1, 1));
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vhandle[1] = mesh.add_vertex(MyMesh::Point( 1, -1, 1));
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vhandle[2] = mesh.add_vertex(MyMesh::Point( 1, 1, 1));
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vhandle[3] = mesh.add_vertex(MyMesh::Point(-1, 1, 1));
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vhandle[4] = mesh.add_vertex(MyMesh::Point(-1, -1, -1));
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vhandle[5] = mesh.add_vertex(MyMesh::Point( 1, -1, -1));
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vhandle[6] = mesh.add_vertex(MyMesh::Point( 1, 1, -1));
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vhandle[7] = mesh.add_vertex(MyMesh::Point(-1, 1, -1));
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// generate (quadrilateral) faces
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std::vector<MyMesh::VertexHandle> tmp_face_vhandles;
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tmp_face_vhandles.clear();
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tmp_face_vhandles.push_back(vhandle[0]);
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tmp_face_vhandles.push_back(vhandle[1]);
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tmp_face_vhandles.push_back(vhandle[2]);
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tmp_face_vhandles.push_back(vhandle[3]);
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fhandle[0] = mesh.add_face(tmp_face_vhandles);
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tmp_face_vhandles.clear();
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tmp_face_vhandles.push_back(vhandle[7]);
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tmp_face_vhandles.push_back(vhandle[6]);
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tmp_face_vhandles.push_back(vhandle[5]);
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tmp_face_vhandles.push_back(vhandle[4]);
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fhandle[1] = mesh.add_face(tmp_face_vhandles);
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tmp_face_vhandles.clear();
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tmp_face_vhandles.push_back(vhandle[1]);
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tmp_face_vhandles.push_back(vhandle[0]);
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tmp_face_vhandles.push_back(vhandle[4]);
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tmp_face_vhandles.push_back(vhandle[5]);
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fhandle[2] = mesh.add_face(tmp_face_vhandles);
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tmp_face_vhandles.clear();
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tmp_face_vhandles.push_back(vhandle[2]);
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tmp_face_vhandles.push_back(vhandle[1]);
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tmp_face_vhandles.push_back(vhandle[5]);
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tmp_face_vhandles.push_back(vhandle[6]);
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fhandle[3] = mesh.add_face(tmp_face_vhandles);
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tmp_face_vhandles.clear();
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tmp_face_vhandles.push_back(vhandle[3]);
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tmp_face_vhandles.push_back(vhandle[2]);
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tmp_face_vhandles.push_back(vhandle[6]);
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tmp_face_vhandles.push_back(vhandle[7]);
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fhandle[4] = mesh.add_face(tmp_face_vhandles);
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tmp_face_vhandles.clear();
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tmp_face_vhandles.push_back(vhandle[0]);
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tmp_face_vhandles.push_back(vhandle[3]);
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tmp_face_vhandles.push_back(vhandle[7]);
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tmp_face_vhandles.push_back(vhandle[4]);
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fhandle[5] = mesh.add_face(tmp_face_vhandles);
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// And now delete all faces and vertices
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// except face (vh[7], vh[6], vh[5], vh[4])
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// whose handle resides in fhandle[1]
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// Delete face 0
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mesh.delete_face(fhandle[0], false);
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// ... face 2
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mesh.delete_face(fhandle[2], false);
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// ... face 3
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mesh.delete_face(fhandle[3], false);
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// ... face 4
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mesh.delete_face(fhandle[4], false);
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// ... face 5
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mesh.delete_face(fhandle[5], false);
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// If isolated vertices result in a face deletion
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// they have to be deleted manually. If you want this
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// to happen automatically, change the second parameter
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// to true.
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// Now delete the isolated vertices 0, 1, 2 and 3
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mesh.delete_vertex(vhandle[0], false);
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mesh.delete_vertex(vhandle[1], false);
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mesh.delete_vertex(vhandle[2], false);
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mesh.delete_vertex(vhandle[3], false);
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// Delete all elements that are marked as deleted
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// from memory.
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mesh.garbage_collection();
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// write mesh to output.obj
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try {
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if ( !OpenMesh::IO::write_mesh(mesh, "output.off") ) {
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std::cerr << "Cannot write mesh to file 'output.off'" << std::endl;
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return 1;
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}
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}
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catch( std::exception& x )
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{
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std::cerr << x.what() << std::endl;
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return 1;
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}
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return 0;
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}
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