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;
}
void CTriangleSelector::updateFromMesh(const IMesh* mesh) const
{
if (!mesh)
return;
bool skinnnedMesh = mesh->getMeshType() == EAMT_SKINNED;
u32 meshBuffers = mesh->getMeshBufferCount();
u32 triangleCount = 0;
BoundingBox.reset(0.f, 0.f, 0.f);
for (u32 i = 0; i < meshBuffers; ++i)
{
IMeshBuffer* buf = mesh->getMeshBuffer(i);
u32 idxCnt = buf->getIndexCount();
const u16* indices = buf->getIndices();
if ( skinnnedMesh )
{
const core::matrix4& bufferTransform = ((scene::SSkinMeshBuffer*)buf)->Transformation;
for (u32 index = 0; index < idxCnt; index += 3)
{
core::triangle3df& tri = Triangles[triangleCount++];
bufferTransform.transformVect(tri.pointA, buf->getPosition(indices[index + 0]));
bufferTransform.transformVect(tri.pointB, buf->getPosition(indices[index + 1]));
bufferTransform.transformVect(tri.pointC, buf->getPosition(indices[index + 2]));
BoundingBox.addInternalPoint(tri.pointA);
BoundingBox.addInternalPoint(tri.pointB);
BoundingBox.addInternalPoint(tri.pointC);
}
}
else
{
for (u32 index = 0; index < idxCnt; index += 3)
{
core::triangle3df& tri = Triangles[triangleCount++];
tri.pointA = buf->getPosition(indices[index + 0]);
tri.pointB = buf->getPosition(indices[index + 1]);
tri.pointC = buf->getPosition(indices[index + 2]);
BoundingBox.addInternalPoint(tri.pointA);
BoundingBox.addInternalPoint(tri.pointB);
BoundingBox.addInternalPoint(tri.pointC);
}
}
}
}
//! 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(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;
}
