bool ofxOBJModel::load(string path) {
bHasNormals = false;
bHasTexCoords = false;
filePath = path;
path = ofToDataPath(path, true);
string line;
for(int i = 0; i < meshes.size(); i++) {
delete meshes[i];
}
meshes.clear();
ObjMesh *currMesh = NULL;
// this is a list of all points
// that we can drop after parsing
vector<ofPoint> points;
vector<ofPoint> normals;
vector<ofPoint> texCoords;
// obj file format vertexes are 1-indexed
points.push_back(ofPoint());
normals.push_back(ofPoint());
texCoords.push_back(ofPoint());
ifstream myfile (path.c_str());
if (myfile.is_open()) {
while (! myfile.eof()) {
getline (myfile,line);
// parse the obj format here.
//
// the only things we're interested in is
// lines beginning with 'g' - this says start of new object
// lines beginning with 'v ' - coordinate of a vertex
// lines beginning with 'vn ' - vertex normals -- todo
// lines beginning with 'vt ' - texcoords (either 2 or 3 values) -- todo
// lines beginning with 'f ' - specifies a face of a shape
// we take each number before the slash as the index
// of the vertex to join up to create a face.
if(line.find("g ")==0) { // new object definition
currMesh = new ObjMesh(line.substr(2));
meshes.push_back(currMesh);
} else if(line.find("v ")==0) { // new vertex
points.push_back(parseCoords(line));
} else if(line.find("vn ")==0) {
bHasNormals = true;
normals.push_back(parseCoords(line));
} else if(line.find("vt ")==0) {
bHasTexCoords = true;
texCoords.push_back(parseCoords(line));
} else if(line.find("f ")==0) { // face definition
if(currMesh!=NULL) {
line = line.substr(2); // lop off "f "
vector<string> indices = split(line, ' ');
// remove any texcoords (/xxx's)
ObjFace *face = new ObjFace();
for(int i = 0; i < indices.size(); i++) {
vector<string> parts = ofSplitString(indices[i], "/");
// first index is always a point
face->points.push_back(points[atoi(parts[0].c_str())]);
if(parts.size()==2) {
face->texCoords.push_back(texCoords[atoi(parts[1].c_str())]);
} else if(parts.size()==3) {
face->normals.push_back(normals[atoi(parts[2].c_str())]);
if(parts[1]!="") {
face->texCoords.push_back(texCoords[atoi(parts[1].c_str())]);
}
}
}
currMesh->addFace(face);
}
}
}
myfile.close();
//#define NORMALIZE_TEXCOORDS
#ifdef NORMALIZE_TEXCOORDS
ofPoint pmin(FLT_MAX, FLT_MAX);
ofPoint pmax(FLT_MIN, FLT_MIN);
for(int i = 0; i < texCoords.size(); i++) {
if(texCoords[i].x<pmin.x) pmin.x = texCoords[i].x;
if(texCoords[i].y<pmin.y) pmin.y = texCoords[i].y;
if(texCoords[i].x>pmax.x) pmax.x = texCoords[i].x;
if(texCoords[i].y>pmax.y) pmax.y = texCoords[i].y;
}
for(int k = 0; k < meshes.size(); k++)
for(int i = 0; i < meshes[k]->faces.size(); i++)
for(int j = 0; j < meshes[k]->faces[i]->texCoords.size(); j++) {
ofPoint p = meshes[k]->faces[i]->texCoords[j];
p.x = ofMap(p.x, pmin.x, pmax.x, 0, 1);
p.y = ofMap(p.y, pmin.y, pmax.y, 0, 1);
meshes[k]->faces[i]->texCoords[j] = p;
}
#endif
loadVbo();
ofLog(OF_LOG_NOTICE, "Successfully loaded %s\n-----\nVertices: %d\nMeshes: %d\nNormals: %d\nTexCoords: %d\n", path.c_str(), points.size(), meshes.size(), normals.size(), texCoords.size());
return true;
} else {
ofLog(OF_LOG_ERROR, "Couldn't find the OBJ file %s\n", path.c_str());
return false;
}
}
bool ofxOBJModel::load(string path) {
filePath = path;
path = ofToDataPath(path, true);
string line;
for(int i = 0; i < meshes.size(); i++) {
delete meshes[i];
}
meshes.clear();
ObjMesh *currMesh = NULL;
// this is a list of all points
// that we can drop after parsing
vector<ofPoint> points;
// obj file format vertexes are 1-indexed
points.push_back(ofPoint());
ifstream myfile (path.c_str());
if (myfile.is_open()) {
while (! myfile.eof()) {
getline (myfile,line);
// parse the obj format here.
//
// the only things we're interested in is
// lines beginning with 'g' - this says start of new object
// lines beginning with 'v ' - coordinate of a vertex
// lines beginning with 'f ' - specifies a face of a shape
// we take each number before the slash as the index
// of the vertex to join up to create a face.
if(line.find("g ")==0) { // new object definition
currMesh = new ObjMesh(line.substr(2));
meshes.push_back(currMesh);
} else if(line.find("v ")==0) { // new vertex
points.push_back(parseVertex(line));
} else if(line.find("f ")==0) { // face definition
if(currMesh!=NULL) {
line = line.substr(2); // lop off "f "
vector<string> indices = split(line, ' ');
// remove any texcoords (/xxx's)
for(int i = 0; i < indices.size(); i++) {
int slashPos = indices[i].find("/");
if(slashPos!=-1) {
indices[i] = indices[i].substr(0, slashPos);
}
}
ObjFace *face = new ObjFace();
for(int i = 0; i < indices.size(); i++) {
face->points.push_back(points[atoi(indices[i].c_str())]);
}
currMesh->addFace(face);
}
}
}
myfile.close();
printf("Successfully loaded %s\n-----\nVertices: %d\nMeshes: %d\n", path.c_str(), points.size(), meshes.size());
return true;
} else {
printf("Couldn't find the OBJ file %s\n", path.c_str());
return false;
}
}
