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// Copyright (C) 2008-2012 Christian Stehno
// This file is part of the "Irrlicht Engine".
// For conditions of distribution and use, see copyright notice in irrlicht.h
#include "IrrCompileConfig.h"
#ifdef _IRR_COMPILE_WITH_OBJ_WRITER_
#include "COBJMeshWriter.h"
#include "os.h"
#include "IMesh.h"
#include "IMeshBuffer.h"
#include "IAttributes.h"
#include "ISceneManager.h"
#include "IMeshCache.h"
#include "IWriteFile.h"
#include "IFileSystem.h"
#include "ITexture.h"
namespace irr
{
namespace scene
{
COBJMeshWriter::COBJMeshWriter(scene::ISceneManager* smgr, io::IFileSystem* fs)
: SceneManager(smgr), FileSystem(fs)
{
#ifdef _DEBUG
setDebugName("COBJMeshWriter");
#endif
if (SceneManager)
SceneManager->grab();
if (FileSystem)
FileSystem->grab();
}
COBJMeshWriter::~COBJMeshWriter()
{
if (SceneManager)
SceneManager->drop();
if (FileSystem)
FileSystem->drop();
}
//! Returns the type of the mesh writer
EMESH_WRITER_TYPE COBJMeshWriter::getType() const
{
return EMWT_OBJ;
}
//! writes a mesh
bool COBJMeshWriter::writeMesh(io::IWriteFile* file, scene::IMesh* mesh, s32 flags)
{
if (!file)
return false;
os::Printer::log("Writing mesh", file->getFileName());
// write OBJ MESH header
const core::stringc name(FileSystem->getFileBasename(SceneManager->getMeshCache()->getMeshName(mesh), false)+".mtl");
file->write("# exported by Irrlicht\n",23);
file->write("mtllib ",7);
file->write(name.c_str(),name.size());
file->write("\n\n",2);
// write mesh buffers
core::array<video::SMaterial*> mat;
u32 allVertexCount=1; // count vertices over the whole file
for (u32 i=0; i<mesh->getMeshBufferCount(); ++i)
{
core::stringc num(i+1);
IMeshBuffer* buffer = mesh->getMeshBuffer(i);
if (buffer && buffer->getVertexCount())
{
file->write("g grp", 5);
file->write(num.c_str(), num.size());
file->write("\n",1);
u32 j;
const u32 vertexCount = buffer->getVertexCount();
for (j=0; j<vertexCount; ++j)
{
file->write("v ",2);
getVectorAsStringLine(buffer->getPosition(j), num);
file->write(num.c_str(), num.size());
}
for (j=0; j<vertexCount; ++j)
{
file->write("vt ",3);
getVectorAsStringLine(buffer->getTCoords(j), num);
file->write(num.c_str(), num.size());
}
for (j=0; j<vertexCount; ++j)
{
file->write("vn ",3);
getVectorAsStringLine(buffer->getNormal(j), num);
file->write(num.c_str(), num.size());
}
file->write("usemtl mat",10);
num = "";
for (j=0; j<mat.size(); ++j)
{
if (*mat[j]==buffer->getMaterial())
{
num = core::stringc(j);
break;
}
}
if (num == "")
{
num = core::stringc(mat.size());
mat.push_back(&buffer->getMaterial());
}
file->write(num.c_str(), num.size());
file->write("\n",1);
const u32 indexCount = buffer->getIndexCount();
for (j=0; j<indexCount; j+=3)
{
file->write("f ",2);
num = core::stringc(buffer->getIndices()[j+2]+allVertexCount);
file->write(num.c_str(), num.size());
file->write("/",1);
file->write(num.c_str(), num.size());
file->write("/",1);
file->write(num.c_str(), num.size());
file->write(" ",1);
num = core::stringc(buffer->getIndices()[j+1]+allVertexCount);
file->write(num.c_str(), num.size());
file->write("/",1);
file->write(num.c_str(), num.size());
file->write("/",1);
file->write(num.c_str(), num.size());
file->write(" ",1);
num = core::stringc(buffer->getIndices()[j+0]+allVertexCount);
file->write(num.c_str(), num.size());
file->write("/",1);
file->write(num.c_str(), num.size());
file->write("/",1);
file->write(num.c_str(), num.size());
file->write(" ",1);
file->write("\n",1);
}
file->write("\n",1);
allVertexCount += vertexCount;
}
}
if (mat.size() == 0)
return true;
file = FileSystem->createAndWriteFile( name );
if (file)
{
os::Printer::log("Writing material", file->getFileName());
file->write("# exported by Irrlicht\n\n",24);
for (u32 i=0; i<mat.size(); ++i)
{
core::stringc num(i);
file->write("newmtl mat",10);
file->write(num.c_str(),num.size());
file->write("\n",1);
getColorAsStringLine(mat[i]->AmbientColor, "Ka", num);
file->write(num.c_str(),num.size());
getColorAsStringLine(mat[i]->DiffuseColor, "Kd", num);
file->write(num.c_str(),num.size());
getColorAsStringLine(mat[i]->SpecularColor, "Ks", num);
file->write(num.c_str(),num.size());
getColorAsStringLine(mat[i]->EmissiveColor, "Ke", num);
file->write(num.c_str(),num.size());
num = core::stringc((double)(mat[i]->Shininess/0.128f));
file->write("Ns ", 3);
file->write(num.c_str(),num.size());
file->write("\n", 1);
if (mat[i]->getTexture(0))
{
file->write("map_Kd ", 7);
file->write(mat[i]->getTexture(0)->getName().getPath().c_str(), mat[i]->getTexture(0)->getName().getPath().size());
file->write("\n",1);
}
file->write("\n",1);
}
file->drop();
}
return true;
}
void COBJMeshWriter::getVectorAsStringLine(const core::vector3df& v, core::stringc& s) const
{
s = core::stringc(-v.X);
s += " ";
s += core::stringc(v.Y);
s += " ";
s += core::stringc(v.Z);
s += "\n";
}
void COBJMeshWriter::getVectorAsStringLine(const core::vector2df& v, core::stringc& s) const
{
s = core::stringc(v.X);
s += " ";
s += core::stringc(-v.Y);
s += "\n";
}
void COBJMeshWriter::getColorAsStringLine(const video::SColor& color, const c8* const prefix, core::stringc& s) const
{
s = prefix;
s += " ";
s += core::stringc((double)(color.getRed()/255.f));
s += " ";
s += core::stringc((double)(color.getGreen()/255.f));
s += " ";
s += core::stringc((double)(color.getBlue()/255.f));
s += "\n";
}
} // end namespace
} // end namespace
#endif
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