First checkin for OpenMesh 2.0
git-svn-id: http://www.openmesh.org/svnrepo/OpenMesh/trunk@2 fdac6126-5c0c-442c-9429-916003d36597
This commit is contained in:
Jan Möbius
432
Core/IO/writer/OFFWriter.cc
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432
Core/IO/writer/OFFWriter.cc
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/*===========================================================================*\
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* *
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* OpenMesh *
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* Copyright (C) 2003 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 Lesser General Public License as published *
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* by the Free Software Foundation, version 2.1. *
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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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* Lesser General Public License for more details. *
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* *
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* You should have received a copy of the GNU Lesser 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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//== INCLUDES =================================================================
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#include <OpenMesh/Core/System/config.h>
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#include <OpenMesh/Core/System/omstream.hh>
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#include <OpenMesh/Core/Utils/Endian.hh>
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#include <OpenMesh/Core/IO/IOManager.hh>
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#include <OpenMesh/Core/IO/BinaryHelper.hh>
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#include <OpenMesh/Core/IO/writer/OFFWriter.hh>
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#include <OpenMesh/Core/IO/SR_store.hh>
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//=== NAMESPACES ==============================================================
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namespace OpenMesh {
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namespace IO {
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//=== INSTANCIATE =============================================================
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// register the OFFLoader singleton with MeshLoader
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_OFFWriter_ __OFFWriterInstance;
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_OFFWriter_& OFFWriter() { return __OFFWriterInstance; }
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//=== IMPLEMENTATION ==========================================================
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_OFFWriter_::_OFFWriter_() { IOManager().register_module(this); }
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//-----------------------------------------------------------------------------
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bool
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_OFFWriter_::
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write(const std::string& _filename, BaseExporter& _be, Options _opt) const
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{
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// check exporter features
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if ( !check( _be, _opt ) )
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return false;
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// check writer features
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if ( _opt.check(Options::FaceNormal) ) // not supported by format
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return false;
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// open file
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std::fstream out(_filename.c_str(), (_opt.check(Options::Binary) ? std::ios_base::binary | std::ios_base::out
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: std::ios_base::out) );
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if (!out)
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{
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omerr() << "[OFFWriter] : cannot open file "
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<< _filename
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<< std::endl;
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return false;
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}
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// write header line
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if (_opt.check(Options::VertexTexCoord)) out << "ST";
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if (_opt.check(Options::VertexColor) || _opt.check(Options::FaceColor)) out << "C";
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if (_opt.check(Options::VertexNormal)) out << "N";
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out << "OFF";
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if (_opt.check(Options::Binary)) out << " BINARY";
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out << "\n";
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// write to file
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bool result = (_opt.check(Options::Binary) ?
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write_binary(out, _be, _opt) :
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write_ascii(out, _be, _opt));
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// return result
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out.close();
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return result;
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}
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//-----------------------------------------------------------------------------
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bool
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_OFFWriter_::
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write_ascii(std::fstream& _out, BaseExporter& _be, Options _opt) const
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{
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omlog() << "[OFFWriter] : write ascii file\n";
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unsigned int i, j, nV, nF;
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Vec3f v, n;
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Vec2f t;
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OpenMesh::Vec3i c;
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OpenMesh::Vec4i cA;
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VertexHandle vh;
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std::vector<VertexHandle> vhandles;
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// #vertices, #faces
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_out << _be.n_vertices() << " ";
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_out << _be.n_faces() << " ";
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_out << 0 << "\n";
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// vertex data (point, normals, colors, texcoords)
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for (i=0, nV=_be.n_vertices(); i<nV; ++i)
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{
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vh = VertexHandle(i);
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v = _be.point(vh);
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//Vertex
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_out << v[0] << " " << v[1] << " " << v[2];
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// VertexNormal
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if ( _opt.vertex_has_normal() ) {
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n = _be.normal(vh);
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_out << " " << n[0] << " " << n[1] << " " << n[2];
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}
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// VertexColor
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if ( _opt.vertex_has_color() ) {
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//with alpha
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if ( _opt.color_has_alpha() ){
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cA = _be.colorA(vh);
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_out << " " << cA[0] << " " << cA[1] << " " << cA[2] << " " << cA[3];
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}else{
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//without alpha
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c = _be.color(vh);
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_out << " " << c[0] << " " << c[1] << " " << c[2];
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}
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}
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// TexCoord
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if (_opt.vertex_has_texcoord() ) {
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t = _be.texcoord(vh);
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_out << " " << t[0] << " " << t[1];
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}
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_out << "\n";
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}
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// faces (indices starting at 0)
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if (_be.is_triangle_mesh())
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{
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for (i=0, nF=_be.n_faces(); i<nF; ++i)
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{
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_be.get_vhandles(FaceHandle(i), vhandles);
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_out << 3 << " ";
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_out << vhandles[0].idx() << " ";
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_out << vhandles[1].idx() << " ";
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_out << vhandles[2].idx();
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//face color
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if ( _opt.face_has_color() ){
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//with alpha
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if ( _opt.color_has_alpha() ){
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cA = _be.colorA( FaceHandle(i) );
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_out << " " << cA[0] << " " << cA[1] << " " << cA[2] << " " << cA[3];
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}else{
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//without alpha
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c = _be.color( FaceHandle(i) );
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_out << " " << c[0] << " " << c[1] << " " << c[2];
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}
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}
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_out << "\n";
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}
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}
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else
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{
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for (i=0, nF=_be.n_faces(); i<nF; ++i)
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{
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nV = _be.get_vhandles(FaceHandle(i), vhandles);
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_out << nV << " ";
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for (j=0; j<vhandles.size(); ++j)
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_out << vhandles[j].idx() << " ";
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//face color
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if ( _opt.face_has_color() ){
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//with alpha
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if ( _opt.color_has_alpha() ){
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cA = _be.colorA( FaceHandle(i) );
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_out << cA[0] << " " << cA[1] << " " << cA[2] << " " << cA[3];
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}else{
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//without alpha
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c = _be.color( FaceHandle(i) );
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_out << c[0] << " " << c[1] << " " << c[2];
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}
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}
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_out << "\n";
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}
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}
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return true;
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}
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//-----------------------------------------------------------------------------
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void _OFFWriter_::writeValue(std::fstream& _out, int value) const {
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uint32_t tmp = value;
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store(_out, tmp, false);
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}
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void _OFFWriter_::writeValue(std::fstream& _out, unsigned int value) const {
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uint32_t tmp = value;
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store(_out, tmp, false);
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}
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void _OFFWriter_::writeValue(std::fstream& _out, float value) const {
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float32_t tmp = value;
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store(_out, tmp, false);
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}
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bool
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_OFFWriter_::
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write_binary(std::fstream& _out, BaseExporter& _be, Options _opt) const
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{
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omlog() << "[OFFWriter] : write ascii file\n";
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unsigned int i, j, nV, nF;
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Vec3f v, n;
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Vec2f t;
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OpenMesh::Vec4i c;
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VertexHandle vh;
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std::vector<VertexHandle> vhandles;
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// #vertices, #faces
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writeValue(_out, (uint)_be.n_vertices() );
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writeValue(_out, (uint) _be.n_faces() );
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writeValue(_out, 0 );
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// vertex data (point, normals, texcoords)
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for (i=0, nV=_be.n_vertices(); i<nV; ++i)
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{
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vh = VertexHandle(i);
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v = _be.point(vh);
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//vertex
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writeValue(_out, v[0]);
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writeValue(_out, v[1]);
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writeValue(_out, v[2]);
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// vertex normal
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if ( _opt.vertex_has_normal() ) {
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n = _be.normal(vh);
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writeValue(_out, n[0]);
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writeValue(_out, n[1]);
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writeValue(_out, n[2]);
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}
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// vertex color
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if ( _opt.vertex_has_color() ) {
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c = _be.colorA(vh);
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writeValue(_out, c[0]);
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writeValue(_out, c[1]);
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writeValue(_out, c[2]);
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if ( _opt.color_has_alpha() )
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writeValue(_out, c[3]);
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}
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// texCoords
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if (_opt.vertex_has_texcoord() ) {
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t = _be.texcoord(vh);
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writeValue(_out, t[0]);
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writeValue(_out, t[1]);
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}
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}
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// faces (indices starting at 0)
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if (_be.is_triangle_mesh())
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{
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for (i=0, nF=_be.n_faces(); i<nF; ++i)
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{
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//face
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_be.get_vhandles(FaceHandle(i), vhandles);
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writeValue(_out, 3);
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writeValue(_out, vhandles[0].idx());
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writeValue(_out, vhandles[1].idx());
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writeValue(_out, vhandles[2].idx());
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//face color
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if ( _opt.face_has_color() ){
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c = _be.colorA( FaceHandle(i) );
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writeValue(_out, c[0]);
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writeValue(_out, c[1]);
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writeValue(_out, c[2]);
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if ( _opt.color_has_alpha() )
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writeValue(_out, c[3]);
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}
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}
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}
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else
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{
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for (i=0, nF=_be.n_faces(); i<nF; ++i)
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{
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//face
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nV = _be.get_vhandles(FaceHandle(i), vhandles);
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writeValue(_out, nV);
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for (j=0; j<vhandles.size(); ++j)
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writeValue(_out, vhandles[j].idx() );
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//face color
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if ( _opt.face_has_color() ){
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c = _be.colorA( FaceHandle(i) );
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writeValue(_out, c[0]);
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writeValue(_out, c[1]);
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writeValue(_out, c[2]);
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if ( _opt.color_has_alpha() )
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writeValue(_out, c[3]);
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}
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}
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}
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return true;
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}
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// ----------------------------------------------------------------------------
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size_t
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_OFFWriter_::
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binary_size(BaseExporter& _be, Options _opt) const
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{
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size_t header(0);
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size_t data(0);
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size_t _3longs(3*sizeof(long));
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size_t _3floats(3*sizeof(float));
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size_t _3ui(3*sizeof(unsigned int));
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size_t _4ui(4*sizeof(unsigned int));
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if ( !_opt.is_binary() )
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return 0;
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else
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{
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header += 11; // 'OFF BINARY\n'
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header += _3longs; // #V #F #E
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data += _be.n_vertices() * _3floats; // vertex data
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}
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if ( _opt.vertex_has_normal() && _be.has_vertex_normals() )
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{
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header += 1; // N
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data += _be.n_vertices() * _3floats;
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}
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if ( _opt.vertex_has_color() && _be.has_vertex_colors() )
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{
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header += 1; // C
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data += _be.n_vertices() * _3floats;
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}
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if ( _opt.vertex_has_texcoord() && _be.has_vertex_texcoords() )
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{
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size_t _2floats(2*sizeof(float));
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header += 2; // ST
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data += _be.n_vertices() * _2floats;
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}
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// topology
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if (_be.is_triangle_mesh())
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{
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data += _be.n_faces() * _4ui;
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}
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else
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{
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unsigned int i, nV, nF;
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std::vector<VertexHandle> vhandles;
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for (i=0, nF=_be.n_faces(); i<nF; ++i)
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{
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nV = _be.get_vhandles(FaceHandle(i), vhandles);
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data += nV * sizeof(unsigned int);
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}
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}
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// face colors
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if ( _opt.face_has_color() && _be.has_face_colors() ){
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if ( _opt.color_has_alpha() )
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data += _be.n_faces() * _4ui;
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else
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data += _be.n_faces() * _3ui;
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}
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return header+data;
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}
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//=============================================================================
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} // namespace IO
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} // namespace OpenMesh
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//=============================================================================
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Block a user