182 lines
7.2 KiB
C++
182 lines
7.2 KiB
C++
/* ========================================================================= *
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* *
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* OpenMesh *
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* Copyright (c) 2001-2015, RWTH-Aachen University *
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* Department of Computer Graphics and Multimedia *
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* All rights reserved. *
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* www.openmesh.org *
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* *
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*---------------------------------------------------------------------------*
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* This file is part of OpenMesh. *
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*---------------------------------------------------------------------------*
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* *
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* Redistribution and use in source and binary forms, with or without *
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* modification, are permitted provided that the following conditions *
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* are met: *
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* *
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* 1. Redistributions of source code must retain the above copyright notice, *
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* this list of conditions and the following disclaimer. *
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* *
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* 2. Redistributions in binary form must reproduce the above copyright *
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* notice, this list of conditions and the following disclaimer in the *
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* documentation and/or other materials provided with the distribution. *
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* *
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* 3. Neither the name of the copyright holder nor the names of its *
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* contributors may be used to endorse or promote products derived from *
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* this software without specific prior written permission. *
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* *
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS *
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED *
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A *
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* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER *
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* OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, *
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, *
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR *
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF *
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING *
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS *
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. *
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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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};
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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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// the request has to be called before a vertex/face/edge can be deleted. it grants access to the status attribute
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mesh.request_face_status();
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mesh.request_edge_status();
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mesh.request_vertex_status();
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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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