void PLYDataWriter::write_header(p_ply oply)
{
ply_add_element ( oply, "vertex", mesh->vertex_count() );
ply_add_scalar_property(oply, "x", PLY_FLOAT );
ply_add_scalar_property(oply, "y", PLY_FLOAT );
ply_add_scalar_property(oply, "z", PLY_FLOAT );
ply_add_element ( oply, "face", mesh->face_count() );
ply_add_list_property ( oply, "vertex_index", PLY_UCHAR, PLY_INT );
ply_write_header ( oply );
}
bool WritePlyFile(const std::string &filename, int nTriangles,
const int *vertexIndices, int nVertices, const Point3f *P,
const Vector3f *S, const Normal3f *N, const Point2f *UV) {
p_ply plyFile =
ply_create(filename.c_str(), PLY_DEFAULT, PlyErrorCallback, 0, nullptr);
if (plyFile != nullptr) {
ply_add_element(plyFile, "vertex", nVertices);
ply_add_scalar_property(plyFile, "x", PLY_FLOAT);
ply_add_scalar_property(plyFile, "y", PLY_FLOAT);
ply_add_scalar_property(plyFile, "z", PLY_FLOAT);
if (N != nullptr) {
ply_add_scalar_property(plyFile, "nx", PLY_FLOAT);
ply_add_scalar_property(plyFile, "ny", PLY_FLOAT);
ply_add_scalar_property(plyFile, "nz", PLY_FLOAT);
}
if (UV != nullptr) {
ply_add_scalar_property(plyFile, "u", PLY_FLOAT);
ply_add_scalar_property(plyFile, "v", PLY_FLOAT);
}
if (S != nullptr)
Warning("PLY mesh in \"%s\" will be missing tangent vectors \"S\".",
filename.c_str());
ply_add_element(plyFile, "face", nTriangles);
ply_add_list_property(plyFile, "vertex_indices", PLY_UINT8, PLY_INT);
ply_write_header(plyFile);
for (int i = 0; i < nVertices; ++i) {
ply_write(plyFile, P[i].x);
ply_write(plyFile, P[i].y);
ply_write(plyFile, P[i].z);
if (N) {
ply_write(plyFile, N[i].x);
ply_write(plyFile, N[i].y);
ply_write(plyFile, N[i].z);
}
if (UV) {
ply_write(plyFile, UV[i].x);
ply_write(plyFile, UV[i].y);
}
}
for (int i = 0; i < nTriangles; ++i) {
ply_write(plyFile, 3);
ply_write(plyFile, vertexIndices[3 * i]);
ply_write(plyFile, vertexIndices[3 * i + 1]);
ply_write(plyFile, vertexIndices[3 * i + 2]);
}
ply_close(plyFile);
return true;
}
return false;
}
void write_ply(const std::string &filename, const MatrixXu &F,
const MatrixXf &V, const MatrixXf &N, const MatrixXf &Nf, const MatrixXf &UV,
const MatrixXf &C, const ProgressCallback &progress) {
auto message_cb = [](p_ply ply, const char *msg) {
cerr << "rply: " << msg << endl;
};
Timer<> timer;
cout << "Writing \"" << filename << "\" (V=" << V.cols()
<< ", F=" << F.cols() << ") .. ";
cout.flush();
if (N.size() > 0 && Nf.size() > 0)
throw std::runtime_error("Please specify either face or vertex normals but not both!");
p_ply ply = ply_create(filename.c_str(), PLY_DEFAULT, message_cb, 0, nullptr);
if (!ply)
throw std::runtime_error("Unable to write PLY file!");
ply_add_comment(ply, "Generated by Instant Meshes");
ply_add_element(ply, "vertex", V.cols());
ply_add_scalar_property(ply, "x", PLY_FLOAT);
ply_add_scalar_property(ply, "y", PLY_FLOAT);
ply_add_scalar_property(ply, "z", PLY_FLOAT);
if (N.size() > 0) {
ply_add_scalar_property(ply, "nx", PLY_FLOAT);
ply_add_scalar_property(ply, "ny", PLY_FLOAT);
ply_add_scalar_property(ply, "nz", PLY_FLOAT);
if (N.cols() != V.cols() || N.rows() != 3)
throw std::runtime_error("Vertex normal matrix has incorrect size");
}
if (UV.size() > 0) {
ply_add_scalar_property(ply, "u", PLY_FLOAT);
ply_add_scalar_property(ply, "v", PLY_FLOAT);
if (UV.cols() != V.cols() || UV.rows() != 2)
throw std::runtime_error("Texture coordinate matrix has incorrect size");
}
if (C.size() > 0) {
ply_add_scalar_property(ply, "red", PLY_FLOAT);
ply_add_scalar_property(ply, "green", PLY_FLOAT);
ply_add_scalar_property(ply, "blue", PLY_FLOAT);
if (C.cols() != V.cols() || (C.rows() != 3 && C.rows() != 4))
throw std::runtime_error("Color matrix has incorrect size");
}
/* Check for irregular faces */
std::map<uint32_t, std::pair<uint32_t, std::map<uint32_t, uint32_t>>> irregular;
size_t nIrregular = 0;
if (F.rows() == 4) {
for (uint32_t f=0; f<F.cols(); ++f) {
if (F(2, f) == F(3, f)) {
nIrregular++;
auto &value = irregular[F(2, f)];
value.first = f;
value.second[F(0, f)] = F(1, f);
}
}
}
ply_add_element(ply, "face", F.cols() - nIrregular + irregular.size());
ply_add_list_property(ply, "vertex_indices", PLY_UINT8, PLY_INT);
if (Nf.size() > 0) {
ply_add_scalar_property(ply, "nx", PLY_FLOAT);
ply_add_scalar_property(ply, "ny", PLY_FLOAT);
ply_add_scalar_property(ply, "nz", PLY_FLOAT);
if (Nf.cols() != F.cols() || Nf.rows() != 3)
throw std::runtime_error("Face normal matrix has incorrect size");
}
ply_write_header(ply);
for (uint32_t j=0; j<V.cols(); ++j) {
for (uint32_t i=0; i<V.rows(); ++i)
ply_write(ply, V(i, j));
if (N.size() > 0) {
for (uint32_t i=0; i<N.rows(); ++i)
ply_write(ply, N(i, j));
}
if (UV.size() > 0) {
for (uint32_t i=0; i<UV.rows(); ++i)
ply_write(ply, UV(i, j));
}
if (C.size() > 0) {
for (uint32_t i=0; i<std::min(3u, (uint32_t) C.rows()); ++i)
ply_write(ply, C(i, j));
}
if (progress && j % 500000 == 0)
progress("Writing vertex data", j / (Float) V.cols());
}
for (uint32_t f=0; f<F.cols(); ++f) {
if (F.rows() == 4 && F(2, f) == F(3, f))
continue;
ply_write(ply, F.rows());
for (uint32_t i=0; i<F.rows(); ++i)
ply_write(ply, F(i, f));
if (Nf.size() > 0) {
for (uint32_t i=0; i<Nf.rows(); ++i)
ply_write(ply, Nf(i, f));
}
if (progress && f % 500000 == 0)
progress("Writing face data", f / (Float) F.cols());
}
for (auto item : irregular) {
auto face = item.second;
uint32_t v = face.second.begin()->first, first = v;
ply_write(ply, face.second.size());
while (true) {
ply_write(ply, v);
v = face.second[v];
if (v == first)
break;
}
if (Nf.size() > 0) {
for (uint32_t i=0; i<Nf.rows(); ++i)
ply_write(ply, Nf(i, face.first));
}
}
ply_close(ply);
cout << "done. (";
if (irregular.size() > 0)
cout << irregular.size() << " irregular faces, ";
cout << "took " << timeString(timer.value()) << ")" << endl;
}
