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// Copyright (C) 2002-2012 Nikolaus Gebhardt
// 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_STL_WRITER_
#include "CSTLMeshWriter.h"
#include "os.h"
#include "IMesh.h"
#include "IMeshBuffer.h"
#include "IAttributes.h"
#include "ISceneManager.h"
#include "IMeshCache.h"
#include "IWriteFile.h"
namespace irr
{
namespace scene
{
CSTLMeshWriter::CSTLMeshWriter(scene::ISceneManager* smgr)
: SceneManager(smgr)
{
#ifdef _DEBUG
setDebugName("CSTLMeshWriter");
#endif
if (SceneManager)
SceneManager->grab();
}
CSTLMeshWriter::~CSTLMeshWriter()
{
if (SceneManager)
SceneManager->drop();
}
//! Returns the type of the mesh writer
EMESH_WRITER_TYPE CSTLMeshWriter::getType() const
{
return EMWT_STL;
}
//! writes a mesh
bool CSTLMeshWriter::writeMesh(io::IWriteFile* file, scene::IMesh* mesh, s32 flags)
{
if (!file)
return false;
os::Printer::log("Writing mesh", file->getFileName());
if (flags & scene::EMWF_WRITE_COMPRESSED)
return writeMeshBinary(file, mesh, flags);
else
return writeMeshASCII(file, mesh, flags);
}
bool CSTLMeshWriter::writeMeshBinary(io::IWriteFile* file, scene::IMesh* mesh, s32 flags)
{
// write STL MESH header
file->write("binary ",7);
const core::stringc name(SceneManager->getMeshCache()->getMeshName(mesh));
const s32 sizeleft = 73-name.size(); // 80 byte header
if (sizeleft<0)
file->write(name.c_str(),73);
else
{
char* buf = new char[80];
memset(buf, 0, 80);
file->write(name.c_str(),name.size());
file->write(buf,sizeleft);
delete [] buf;
}
u32 facenum = 0;
for (u32 j=0; j<mesh->getMeshBufferCount(); ++j)
facenum += mesh->getMeshBuffer(j)->getIndexCount()/3;
file->write(&facenum,4);
// write mesh buffers
for (u32 i=0; i<mesh->getMeshBufferCount(); ++i)
{
IMeshBuffer* buffer = mesh->getMeshBuffer(i);
if (buffer)
{
const u32 indexCount = buffer->getIndexCount();
const u16 attributes = 0;
for (u32 j=0; j<indexCount; j+=3)
{
const core::vector3df& v1 = buffer->getPosition(buffer->getIndices()[j]);
const core::vector3df& v2 = buffer->getPosition(buffer->getIndices()[j+1]);
const core::vector3df& v3 = buffer->getPosition(buffer->getIndices()[j+2]);
const core::plane3df tmpplane(v1,v2,v3);
file->write(&tmpplane.Normal, 12);
file->write(&v1, 12);
file->write(&v2, 12);
file->write(&v3, 12);
file->write(&attributes, 2);
}
}
}
return true;
}
bool CSTLMeshWriter::writeMeshASCII(io::IWriteFile* file, scene::IMesh* mesh, s32 flags)
{
// write STL MESH header
file->write("solid ",6);
const core::stringc name(SceneManager->getMeshCache()->getMeshName(mesh));
file->write(name.c_str(),name.size());
file->write("\n\n",2);
// write mesh buffers
for (u32 i=0; i<mesh->getMeshBufferCount(); ++i)
{
IMeshBuffer* buffer = mesh->getMeshBuffer(i);
if (buffer)
{
const u32 indexCount = buffer->getIndexCount();
for (u32 j=0; j<indexCount; j+=3)
{
writeFace(file,
buffer->getPosition(buffer->getIndices()[j]),
buffer->getPosition(buffer->getIndices()[j+1]),
buffer->getPosition(buffer->getIndices()[j+2]));
}
file->write("\n",1);
}
}
file->write("endsolid ",9);
file->write(name.c_str(),name.size());
return true;
}
void CSTLMeshWriter::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 CSTLMeshWriter::writeFace(io::IWriteFile* file,
const core::vector3df& v1,
const core::vector3df& v2,
const core::vector3df& v3)
{
core::stringc tmp;
file->write("facet normal ",13);
getVectorAsStringLine(core::plane3df(v1,v2,v3).Normal, tmp);
file->write(tmp.c_str(),tmp.size());
file->write(" outer loop\n",13);
file->write(" vertex ",11);
getVectorAsStringLine(v1, tmp);
file->write(tmp.c_str(),tmp.size());
file->write(" vertex ",11);
getVectorAsStringLine(v2, tmp);
file->write(tmp.c_str(),tmp.size());
file->write(" vertex ",11);
getVectorAsStringLine(v3, tmp);
file->write(tmp.c_str(),tmp.size());
file->write(" endloop\n",10);
file->write("endfacet\n",9);
}
} // end namespace
} // end namespace
#endif
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