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// K-3D
// Copyright (c) 1995-2004, Timothy M. Shead
//
// Contact: tshead@k-3d.com
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This program 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
// General Public License for more details.
//
// You should have received a copy of the GNU General Public
// License along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
/** \file
\brief Implements the OBJWriter K-3D object, which exports Wavefront .obj files
\author Tim Shead (tshead@k-3d.com)
*/
#include <k3dsdk/ideletable.h>
#include <k3dsdk/idocument.h>
#include <k3dsdk/ifile_format.h>
#include <k3dsdk/igeometry_write_format.h>
#include <k3dsdk/imaterial.h>
#include <k3dsdk/imaterial_collection.h>
#include <k3dsdk/k3dilocation.h>
#include <k3dsdk/k3dimesh.h>
#include <k3dsdk/k3dipath.h>
#include <k3dsdk/k3dipathcollection.h>
#include <k3dsdk/k3dipathpoint.h>
#include <k3dsdk/k3dipathpointcollection.h>
#include <k3dsdk/k3dipoint.h>
#include <k3dsdk/k3dipointcollection.h>
#include <k3dsdk/module.h>
#include <k3dsdk/objects.h>
#include <k3dsdk/result.h>
#include <k3dsdk/string_modifiers.h>
#include <k3dsdk/vectors.h>
#include <boost/filesystem/fstream.hpp>
#include <boost/filesystem/path.hpp>
#include <map>
namespace
{
typedef std::map<k3dIPoint*, unsigned long> PointMap;
// Output functors
class write_mesh :
public k3dIPointVisitor,
public k3dIPathVisitor
{
public:
write_mesh(PointMap& pointmap, unsigned long& pointindex, boost::filesystem::ofstream& file) :
m_PointMap(pointmap),
m_PointIndex(pointindex),
m_File(file),
m_CurrentMaterial(0)
{
}
void VisitPoint(k3dIPoint* const Point)
{
m_PointMap[Point] = m_PointIndex++;
k3d::vector3 coords = Point->Location()->LocalXYZ();
m_File << "v " << coords << std::endl;
}
void VisitPath(k3dIPath* const Path)
{
k3dIPathPointCollection* const pathpointserver = Path->Points();
return_if_fail(pathpointserver->PointCount());
// Handle materials as we go ...
if(m_CurrentMaterial != Path->Materials()->material())
{
m_CurrentMaterial = Path->Materials()->material();
if(m_CurrentMaterial)
{
k3d::iobject* const object = dynamic_cast<k3d::iobject*>(m_CurrentMaterial);
assert_warning(object);
m_File << "usemtl " << object->name() << std::endl;
}
}
// Write the path ...
m_File << "f";
for(K3DPATHPOINTHANDLE pathpointhandle = pathpointserver->FirstPathPoint(); pathpointhandle; pathpointhandle = pathpointserver->NextPathPoint(pathpointhandle))
m_File << " " << m_PointMap[pathpointserver->PathPoint(pathpointhandle)->Point()];
m_File << std::endl;
}
private:
PointMap& m_PointMap;
unsigned long& m_PointIndex;
boost::filesystem::ofstream& m_File;
// Keep track of the material as we go ...
k3d::imaterial* m_CurrentMaterial;
};
/////////////////////////////////////////////////////////////////////////////
// obj_writer_implementation
class obj_writer_implementation :
public k3d::ifile_format,
public k3d::igeometry_write_format,
public k3d::ideletable
{
public:
unsigned long priority()
{
return 0;
}
bool query_can_handle(const boost::filesystem::path& FilePath)
{
return "obj" == k3d::file_extension(FilePath);
}
bool pre_write(k3d::idocument& Document, const boost::filesystem::path& FilePath)
{
return true;
}
bool write_options(k3d::idocument& Document, const boost::filesystem::path& FilePath)
{
return true;
}
bool write_file(k3d::idocument& Document, const boost::filesystem::path& FilePath);
k3d::iplugin_factory& factory()
{
return get_factory();
}
static k3d::iplugin_factory& get_factory()
{
static k3d::plugin_factory<k3d::application_plugin<obj_writer_implementation>, k3d::interface_list<k3d::igeometry_write_format> > factory(
k3d::uuid(0x473cebdd, 0xc6a949f1, 0x9b56c218, 0xe511ed18),
"OBJWriter",
"Wavefront ( .obj )",
"");
return factory;
}
};
bool obj_writer_implementation::write_file(k3d::idocument& Document, const boost::filesystem::path& FilePath)
{
// Try to open the output file ...
boost::filesystem::ofstream file(FilePath);
return_val_if_fail(file.good(), false);
file << "# Written by K-3D" << std::endl;
// Keep track of 1-based point indices as we write them ...
PointMap pointmap;
unsigned long pointindex = 1;
// Get the set of available meshes ...
k3d::objects_t meshes = k3d::find_objects<k3dIMesh>(Document.objects());
// For each mesh ...
for(k3d::objects_t::iterator meshobject = meshes.begin(); meshobject != meshes.end(); meshobject++)
{
k3dIMesh* const mesh = dynamic_cast<k3dIMesh*>(*meshobject);
return_val_if_fail(mesh, false);
// Write points ...
write_mesh functor(pointmap, pointindex, file);
mesh->Points()->VisitPoints(&functor);
// Write paths ...
mesh->Paths()->VisitPaths(&functor);
}
return true;
}
} // namespace
namespace libk3dgeometry
{
k3d::iplugin_factory& obj_writer_factory()
{
return obj_writer_implementation::get_factory();
}
} // namespace libk3dgeometry
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