bool ObjFile::_parse(std::istream& is)
{
// Clear any previous garbage
mObjObjects.clear();
// Unload binary mesh content just in case
unload();
// Reference to non existing obj, until an obj is defined in the file
mObjObjects.emplace_back();
ObjObject* obj = &mObjObjects[0];
obj->name = "Undefined";
bool firstObject = true;
// Reference to non existing obj, until an obj is defined in the file
obj->materials.emplace_back();
ObjMaterial* mat = &obj->materials[0];
mat->name = "Undefined";
bool firstMaterial = true;
uint32 pOffset = 0, tOffset = 0, nOffset = 0;
std::string line, token;
while (!is.eof())
{
std::getline(is, line, '\n');
std::stringstream lstream(line);
lstream >> token;
if (token == "o")
{
// Grab the obj name
lstream >> token;
// If there is an undefined obj to use
// just use that otherwise make a new one
if (firstObject)
{
obj->name = token;
firstObject = false;
}
else
{
pOffset += obj->positions.size();
tOffset += obj->texcoords.size();
nOffset += obj->normals.size();
size_t s = mObjObjects.size();
mObjObjects.emplace_back();
obj = &mObjObjects[s];
obj->name = token;
// New object so make a new place to put the indices
// Undefined material for now until a usemtl shows up
obj->materials.resize(1);
mat = &obj->materials[0];
mat->name = "Undefined";
firstMaterial = true;
}
}
else if (token == "usemtl")
//Function to read a line from in containing the difficulty and 7 scores
//The 7 scores should be stored in d and difficulty is stored in dif
//White spaces in the end of the line should be ignored
//If any errors in the line then return false
//Otherwise, return true
//Use stringstreams, see sec. 11.9 of course book and Fö 2
bool read_line(istream& in, double d[], double &dif)
{
int scores = 0;
double tmp;
string line;
getline(in, line);
istringstream lstream(line);
lstream >> dif;
while ( (lstream >> tmp) && (scores < NR_OF_REF) )
{
d[scores++] = tmp;
}
//Skip whitespaces
lstream >> ws;
if (lstream.eof())
{
return true;
}
else
{
return false;
}
}
void Geometry::parseObjFile(const std::string filePath, std::vector<GLfloat>& vboData, std::vector<GLushort>& iboData)
{
//temporary save values in arrays
std::vector<glm::vec3> vertices;
std::vector<glm::vec3> normals;
//save which data vbo already contains
std::list<IndexCombination> combinations;
//save next vbo index to use
GLushort nextVboIndex = 0;
//open file
std::ifstream objFile;
objFile.exceptions(std::ifstream::badbit | std::ifstream::failbit);
objFile.open(filePath);
std::string line;
while (!objFile.eof()) {
try {
std::getline(objFile, line);
}
catch (const std::exception &ex) {
if (!objFile.eof()) {
throw ex;
}
else {
continue;
}
}
std::istringstream lstream(line);
std::string type;
lstream >> type;
if (type.compare("v") == 0) {
parseVertex(lstream, vertices);
}
else if (type.compare("vn") == 0) {
parseNormal(lstream, normals);
}
else if (type.compare("f") == 0) {
parseFace(lstream, vboData, iboData, vertices, normals, &nextVboIndex, combinations);
}
else if (type.compare("s") == 0) {
//ignore line
}
else if (type.compare("o") == 0) {
//ignore line
}
else if (type.compare("#") == 0) {
//ignore line
}
else {
throw std::logic_error("Unknown start of line");
}
}
objFile.close();
}
void insert_from_2column_file_with_filter(const std::string& filename,
const XYFilter& xy_filter)
{
std::ifstream stream(filename.c_str());
if(!stream.good())
throw std::runtime_error("Could not open: "+filename);
auto* file_record = calin::provenance::chronicle::register_file_open(filename,
calin::ix::provenance::chronicle::AT_READ, __PRETTY_FUNCTION__);
std::string comment;
std::string line;
std::getline(stream,line);
while((line.empty() or line[0] == '#') and stream) {
if(line[0] == '#') {
comment += line;
comment += '\n';
}
std::getline(stream,line);
}
if(!stream)return;
do
{
double x;
double y;
std::istringstream lstream(line);
lstream >> x >> y;
if(lstream) {
if(xy_filter(x,y)) {
m_xy.emplace_back(x, y); }
}
std::getline(stream,line);
}while(stream);
std::sort(m_xy.begin(), m_xy.end());
file_record->set_comment(comment);
calin::provenance::chronicle::register_file_close(file_record);
}