int main(int argc, char *argv[])
{
std::string texture_filename("granite.dds");
std::string object_filename("car.object");
if (argc > 2) texture_filename = argv[2];
if (argc > 1) object_filename = argv[1];
if (!app.Init()) exit(8);
if (!app.InitShaders()) exit(9);
if (!app.LoadTexture(texture_filename.c_str())) exit(10);
if (!app.LoadObject(object_filename.c_str())) exit(11);
app.RunRender();
return 0;
}
/**
* @brief Writes an obj file of the given Mesh, including texture coordinates,
* and an mtl file containing a reference to the isomap.
*
* The obj will contain texture coordinates for the mesh, and the
* mtl file will link to a file named <filename>.isomap.png.
* Note that the texture (isomap) has to be saved separately.
*
* @param[in] mesh The mesh to save as obj.
* @param[in] filename Output filename.
*/
inline void write_textured_obj(Mesh mesh, std::string filename)
{
assert((mesh.vertices.size() == mesh.colors.size() || mesh.colors.empty()) && !mesh.texcoords.empty());
std::ofstream obj_file(filename);
boost::filesystem::path mtl_filename(filename);
mtl_filename.replace_extension(".mtl");
obj_file << "mtllib " << mtl_filename.filename().string() << std::endl; // first line of the obj file
// same as in write_obj():
if (mesh.colors.empty()) {
for (std::size_t i = 0; i < mesh.vertices.size(); ++i) {
obj_file << "v " << mesh.vertices[i][0] << " " << mesh.vertices[i][1] << " " << mesh.vertices[i][2] << " " << std::endl;
}
}
else {
for (std::size_t i = 0; i < mesh.vertices.size(); ++i) {
obj_file << "v " << mesh.vertices[i][0] << " " << mesh.vertices[i][1] << " " << mesh.vertices[i][2] << " " << mesh.colors[i][0] << " " << mesh.colors[i][1] << " " << mesh.colors[i][2] << " " << std::endl;
}
}
// end
for (std::size_t i = 0; i < mesh.texcoords.size(); ++i) {
obj_file << "vt " << mesh.texcoords[i][0] << " " << 1.0f - mesh.texcoords[i][1] << std::endl;
// We invert y because Meshlab's uv origin (0, 0) is on the bottom-left
}
obj_file << "usemtl FaceTexture" << std::endl; // the name of our texture (material) will be 'FaceTexture'
for (auto&& v : mesh.tvi) {
// This assumes mesh.texcoords.size() == mesh.vertices.size(). The texture indices could theoretically be different (for example in the cube-mapped 3D scan)
// Add one because obj starts counting triangle indices at 1
obj_file << "f " << v[0] + 1 << "/" << v[0] + 1 << " " << v[1] + 1 << "/" << v[1] + 1 << " " << v[2] + 1 << "/" << v[2] + 1 << std::endl;
}
std::ofstream mtl_file(mtl_filename.string());
boost::filesystem::path texture_filename(filename);
texture_filename.replace_extension(".isomap.png");
mtl_file << "newmtl FaceTexture" << std::endl;
mtl_file << "map_Kd " << texture_filename.filename().string() << std::endl;
return;
};
