/**
* Loads the specified file, then validates.
*/
bool OBJModel::loadFile(const std::string& filename) {
writeToLog(MessageLevel::INFO, "Loading model from file \"%s\"\n", filename.c_str());
valid = false;
path p(filename);
uint32_t fileLine = 0;
if (exists(p) && is_regular_file(p)) {
std::ifstream file(p.generic_string());
vertices.clear();
textureCoords.clear();
normals.clear();
faces.clear();
vertices.push_back(Vector3(0.0f, 0.0f, 0.0f));
textureCoords.push_back(Vector2(0.0f, 0.0f));
normals.push_back(Vector3(0.0f, 0.0f, 0.0f));
do {
std::string line;
std::getline(file, line);
fileLine++;
StringTokenizer tokens(line, ' ');
if (tokens.getTokenCount() > 0) {
std::string type = tokens.getToken(0);
if (type.compare("v") == 0) {
Vector3 vertex = vector3FromTokens(tokens.getToken(1),
tokens.getToken(2),
tokens.getToken(3));
vertices.push_back(vertex);
} else if (type.compare("vt") == 0) {
Vector2 texCoord = vector2FromTokens(tokens.getToken(1),
tokens.getToken(2));
textureCoords.push_back(texCoord);
} else if (type.compare("vn") == 0) {
Vector3 normal = vector3FromTokens(tokens.getToken(1),
tokens.getToken(2),
tokens.getToken(3));
normals.push_back(normal);
} else if (type.compare("f") == 0) {
OBJFace face;
for (uint32_t i = 1; i < tokens.getTokenCount(); i++) {
StringTokenizer faceTokens(tokens.getToken(i), '/');
int32_t v = 0;
int32_t vt = 0;
int32_t vn = 0;
try {
v = std::stoi(faceTokens.getToken(0));
if (v < 0) {
v += vertices.size();
}
} catch (std::exception&) {
v = 0;
}
try {
vt = std::stoi(faceTokens.getToken(1));
if (vt < 0) {
vt += textureCoords.size();
}
} catch (std::exception&) {
vt = 0;
}
try {
vn = std::stoi(faceTokens.getToken(2));
if (vn < 0) {
vn += normals.size();
}
} catch (std::exception&) {
vn = 0;
}
face.push(v, vt, vn);
}
// We only support triangulated models.
if (face.getTripletCount() > 3) {
writeToLog(MessageLevel::ERROR, "Malformed face on line %d in \"%s\": Too many points, only triangles are supported.\n", fileLine, filename.c_str());
return false;
}
faces.push_back(face);
} else {
// Currently a no-op.
}
}
} while(!file.eof() && file.good());
} else {
writeToLog(MessageLevel::ERROR, "Could not find file \"%s\".\n", filename.c_str());
return false;
}
return validate();
}
void VBOWFModel::Tokenise_Data(std::string input)
{
float tempfloat[3]; //temporary float array of 3
StringTokens tokens(input,' ');
if(tokens.First_token()=="v") //if vertices
{
tokens.Next_token();
tempfloat[0] = (float)atof(tokens.Next_token().c_str()); //x value
tempfloat[1] = (float)atof(tokens.Next_token().c_str()); //y value
tempfloat[2] = (float)atof(tokens.Next_token().c_str()); //z value
verts.push_back(Vec3f(tempfloat[0],tempfloat[1],tempfloat[2]));
}
else if(tokens.First_token()=="vn") //if normals
{
tokens.Next_token();
tempfloat[0] = (float)atof(tokens.Next_token().c_str()); //x value
tempfloat[1] = (float)atof(tokens.Next_token().c_str()); //y value
tempfloat[2] = (float)atof(tokens.Next_token().c_str()); //z value
norms.push_back(Vec3f(tempfloat[0],tempfloat[1],tempfloat[2]));
}
else if(tokens.First_token()=="vt") //if texture coords
{
tokens.Next_token();
tempfloat[0] = (float)atof(tokens.Next_token().c_str()); //x value
tempfloat[1] = (float)atof(tokens.Next_token().c_str()); //y value
tempfloat[2] = (float)atof(tokens.Next_token().c_str()); //z value
tex.push_back(Vec2f(tempfloat[0],tempfloat[1]));
}
else if(tokens.First_token()=="f") //if face
{
tokens.Next_token();
Vec3f temp;
for(int i=0; i<3; i++) //get 3 vert indexes, text coord index, normals index
{
StringTokens faceTokens(tokens.Next_token(),'/');
m_Vindices.push_back(atoi(faceTokens.Next_token().c_str())-1); //store vertex index
m_Tindices.push_back(atoi(faceTokens.Next_token().c_str())-1);
m_Nindices.push_back(atoi(faceTokens.Next_token().c_str())-1);
}
}
else if(tokens.First_token()=="mtllib") //if material lib
{
string mtl = "Model/"; //mtl file location
string image = "textures/wdworld/"; //image file location
string temp2;
tokens.Next_token();
mtl.append(tokens.Next_token()); //add it to the location
ifstream material(mtl.c_str()); //create input filestream for MTL
if(material) //if material exists
{
while(std::getline(material, temp2)) //tokenize MTL
{
istringstream matName(temp2);
getline(matName,temp2); //get image name
image.append(temp2); //add it to the location
mtlName.push_back(image); //store it
image = "textures/wdworld/"; //reset image to only location
}
m_texture = Texture(mtlName.back());
if(!(m_texture.LoadTexture()))//if loaded succesfully
{
cout << "File DNE" << endl;
}
}
else //if material DNE
{
cout << "material file " << temp2 << " DNE" << endl;
}
}
}
