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openmesh/Core/IO/writer/OFFWriter.cc
Jan Möbius 97f515985d First checkin for OpenMesh 2.0 
git-svn-id: http://www.openmesh.org/svnrepo/OpenMesh/trunk@2 fdac6126-5c0c-442c-9429-916003d36597
2009-02-06 13:37:46 +00:00

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11 KiB
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/*===========================================================================*\
* *
* OpenMesh *
* Copyright (C) 2003 by Computer Graphics Group, RWTH Aachen *
* www.openmesh.org *
* *
*---------------------------------------------------------------------------*
* *
* License *
* *
* This library is free software; you can redistribute it and/or modify it *
* under the terms of the GNU Lesser General Public License as published *
* by the Free Software Foundation, version 2.1. *
* *
* This library is distributed in the hope that it will be useful, but *
* WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
* Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public *
* License along with this library; if not, write to the Free Software *
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. *
* *
\*===========================================================================*/
//== INCLUDES =================================================================
#include <OpenMesh/Core/System/config.h>
#include <OpenMesh/Core/System/omstream.hh>
#include <OpenMesh/Core/Utils/Endian.hh>
#include <OpenMesh/Core/IO/IOManager.hh>
#include <OpenMesh/Core/IO/BinaryHelper.hh>
#include <OpenMesh/Core/IO/writer/OFFWriter.hh>
#include <OpenMesh/Core/IO/SR_store.hh>
//=== NAMESPACES ==============================================================
namespace OpenMesh {
namespace IO {
//=== INSTANCIATE =============================================================
// register the OFFLoader singleton with MeshLoader
_OFFWriter_ __OFFWriterInstance;
_OFFWriter_& OFFWriter() { return __OFFWriterInstance; }
//=== IMPLEMENTATION ==========================================================
_OFFWriter_::_OFFWriter_() { IOManager().register_module(this); }
//-----------------------------------------------------------------------------
bool
_OFFWriter_::
write(const std::string& _filename, BaseExporter& _be, Options _opt) const
{
// check exporter features
if ( !check( _be, _opt ) )
return false;
// check writer features
if ( _opt.check(Options::FaceNormal) ) // not supported by format
return false;
// open file
std::fstream out(_filename.c_str(), (_opt.check(Options::Binary) ? std::ios_base::binary | std::ios_base::out
: std::ios_base::out) );
if (!out)
{
omerr() << "[OFFWriter] : cannot open file "
<< _filename
<< std::endl;
return false;
}
// write header line
if (_opt.check(Options::VertexTexCoord)) out << "ST";
if (_opt.check(Options::VertexColor) || _opt.check(Options::FaceColor)) out << "C";
if (_opt.check(Options::VertexNormal)) out << "N";
out << "OFF";
if (_opt.check(Options::Binary)) out << " BINARY";
out << "\n";
// write to file
bool result = (_opt.check(Options::Binary) ?
write_binary(out, _be, _opt) :
write_ascii(out, _be, _opt));
// return result
out.close();
return result;
}
//-----------------------------------------------------------------------------
bool
_OFFWriter_::
write_ascii(std::fstream& _out, BaseExporter& _be, Options _opt) const
{
omlog() << "[OFFWriter] : write ascii file\n";
unsigned int i, j, nV, nF;
Vec3f v, n;
Vec2f t;
OpenMesh::Vec3i c;
OpenMesh::Vec4i cA;
VertexHandle vh;
std::vector<VertexHandle> vhandles;
// #vertices, #faces
_out << _be.n_vertices() << " ";
_out << _be.n_faces() << " ";
_out << 0 << "\n";
// vertex data (point, normals, colors, texcoords)
for (i=0, nV=_be.n_vertices(); i<nV; ++i)
{
vh = VertexHandle(i);
v = _be.point(vh);
//Vertex
_out << v[0] << " " << v[1] << " " << v[2];
// VertexNormal
if ( _opt.vertex_has_normal() ) {
n = _be.normal(vh);
_out << " " << n[0] << " " << n[1] << " " << n[2];
}
// VertexColor
if ( _opt.vertex_has_color() ) {
//with alpha
if ( _opt.color_has_alpha() ){
cA = _be.colorA(vh);
_out << " " << cA[0] << " " << cA[1] << " " << cA[2] << " " << cA[3];
}else{
//without alpha
c = _be.color(vh);
_out << " " << c[0] << " " << c[1] << " " << c[2];
}
}
// TexCoord
if (_opt.vertex_has_texcoord() ) {
t = _be.texcoord(vh);
_out << " " << t[0] << " " << t[1];
}
_out << "\n";
}
// faces (indices starting at 0)
if (_be.is_triangle_mesh())
{
for (i=0, nF=_be.n_faces(); i<nF; ++i)
{
_be.get_vhandles(FaceHandle(i), vhandles);
_out << 3 << " ";
_out << vhandles[0].idx() << " ";
_out << vhandles[1].idx() << " ";
_out << vhandles[2].idx();
//face color
if ( _opt.face_has_color() ){
//with alpha
if ( _opt.color_has_alpha() ){
cA = _be.colorA( FaceHandle(i) );
_out << " " << cA[0] << " " << cA[1] << " " << cA[2] << " " << cA[3];
}else{
//without alpha
c = _be.color( FaceHandle(i) );
_out << " " << c[0] << " " << c[1] << " " << c[2];
}
}
_out << "\n";
}
}
else
{
for (i=0, nF=_be.n_faces(); i<nF; ++i)
{
nV = _be.get_vhandles(FaceHandle(i), vhandles);
_out << nV << " ";
for (j=0; j<vhandles.size(); ++j)
_out << vhandles[j].idx() << " ";
//face color
if ( _opt.face_has_color() ){
//with alpha
if ( _opt.color_has_alpha() ){
cA = _be.colorA( FaceHandle(i) );
_out << cA[0] << " " << cA[1] << " " << cA[2] << " " << cA[3];
}else{
//without alpha
c = _be.color( FaceHandle(i) );
_out << c[0] << " " << c[1] << " " << c[2];
}
}
_out << "\n";
}
}
return true;
}
//-----------------------------------------------------------------------------
void _OFFWriter_::writeValue(std::fstream& _out, int value) const {
uint32_t tmp = value;
store(_out, tmp, false);
}
void _OFFWriter_::writeValue(std::fstream& _out, unsigned int value) const {
uint32_t tmp = value;
store(_out, tmp, false);
}
void _OFFWriter_::writeValue(std::fstream& _out, float value) const {
float32_t tmp = value;
store(_out, tmp, false);
}
bool
_OFFWriter_::
write_binary(std::fstream& _out, BaseExporter& _be, Options _opt) const
{
omlog() << "[OFFWriter] : write ascii file\n";
unsigned int i, j, nV, nF;
Vec3f v, n;
Vec2f t;
OpenMesh::Vec4i c;
VertexHandle vh;
std::vector<VertexHandle> vhandles;
// #vertices, #faces
writeValue(_out, (uint)_be.n_vertices() );
writeValue(_out, (uint) _be.n_faces() );
writeValue(_out, 0 );
// vertex data (point, normals, texcoords)
for (i=0, nV=_be.n_vertices(); i<nV; ++i)
{
vh = VertexHandle(i);
v = _be.point(vh);
//vertex
writeValue(_out, v[0]);
writeValue(_out, v[1]);
writeValue(_out, v[2]);
// vertex normal
if ( _opt.vertex_has_normal() ) {
n = _be.normal(vh);
writeValue(_out, n[0]);
writeValue(_out, n[1]);
writeValue(_out, n[2]);
}
// vertex color
if ( _opt.vertex_has_color() ) {
c = _be.colorA(vh);
writeValue(_out, c[0]);
writeValue(_out, c[1]);
writeValue(_out, c[2]);
if ( _opt.color_has_alpha() )
writeValue(_out, c[3]);
}
// texCoords
if (_opt.vertex_has_texcoord() ) {
t = _be.texcoord(vh);
writeValue(_out, t[0]);
writeValue(_out, t[1]);
}
}
// faces (indices starting at 0)
if (_be.is_triangle_mesh())
{
for (i=0, nF=_be.n_faces(); i<nF; ++i)
{
//face
_be.get_vhandles(FaceHandle(i), vhandles);
writeValue(_out, 3);
writeValue(_out, vhandles[0].idx());
writeValue(_out, vhandles[1].idx());
writeValue(_out, vhandles[2].idx());
//face color
if ( _opt.face_has_color() ){
c = _be.colorA( FaceHandle(i) );
writeValue(_out, c[0]);
writeValue(_out, c[1]);
writeValue(_out, c[2]);
if ( _opt.color_has_alpha() )
writeValue(_out, c[3]);
}
}
}
else
{
for (i=0, nF=_be.n_faces(); i<nF; ++i)
{
//face
nV = _be.get_vhandles(FaceHandle(i), vhandles);
writeValue(_out, nV);
for (j=0; j<vhandles.size(); ++j)
writeValue(_out, vhandles[j].idx() );
//face color
if ( _opt.face_has_color() ){
c = _be.colorA( FaceHandle(i) );
writeValue(_out, c[0]);
writeValue(_out, c[1]);
writeValue(_out, c[2]);
if ( _opt.color_has_alpha() )
writeValue(_out, c[3]);
}
}
}
return true;
}
// ----------------------------------------------------------------------------
size_t
_OFFWriter_::
binary_size(BaseExporter& _be, Options _opt) const
{
size_t header(0);
size_t data(0);
size_t _3longs(3*sizeof(long));
size_t _3floats(3*sizeof(float));
size_t _3ui(3*sizeof(unsigned int));
size_t _4ui(4*sizeof(unsigned int));
if ( !_opt.is_binary() )
return 0;
else
{
header += 11; // 'OFF BINARY\n'
header += _3longs; // #V #F #E
data += _be.n_vertices() * _3floats; // vertex data
}
if ( _opt.vertex_has_normal() && _be.has_vertex_normals() )
{
header += 1; // N
data += _be.n_vertices() * _3floats;
}
if ( _opt.vertex_has_color() && _be.has_vertex_colors() )
{
header += 1; // C
data += _be.n_vertices() * _3floats;
}
if ( _opt.vertex_has_texcoord() && _be.has_vertex_texcoords() )
{
size_t _2floats(2*sizeof(float));
header += 2; // ST
data += _be.n_vertices() * _2floats;
}
// topology
if (_be.is_triangle_mesh())
{
data += _be.n_faces() * _4ui;
}
else
{
unsigned int i, nV, nF;
std::vector<VertexHandle> vhandles;
for (i=0, nF=_be.n_faces(); i<nF; ++i)
{
nV = _be.get_vhandles(FaceHandle(i), vhandles);
data += nV * sizeof(unsigned int);
}
}
// face colors
if ( _opt.face_has_color() && _be.has_face_colors() ){
if ( _opt.color_has_alpha() )
data += _be.n_faces() * _4ui;
else
data += _be.n_faces() * _3ui;
}
return header+data;
}
//=============================================================================
} // namespace IO
} // namespace OpenMesh
//=============================================================================
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