ObjLoader::ObjLoader(std::string filepath)
{
std::ifstream file;
file.open(filepath.c_str(), std::ios::in);
for(std::string line; std::getline(file, line);)
{
std::stringstream ss(line);
std::string identifier;
ss >> identifier;
if(identifier.compare("#") ==0)
{
std::cout << "Found comment" << std::endl;
}
else if(identifier.compare("v") == 0)
{
std::vector<float> vec3 = loadNumbers(ss);
vertices.push_back(Vertex(vec3[0], vec3[1], vec3[2]));
}
else if(identifier.compare("vn") == 0)
{
std::vector<float> vec3 = loadNumbers(ss);
normals.push_back(triplet<float, float, float>(vec3[0], vec3[1], vec3[2]));
}
else if(identifier.compare("vt") == 0)
{
//std::cout << "tex coord found" << std::endl;
std::pair<float, float> texCoord = loadTexCoords(ss);
texCoords.push_back(texCoord);
}
else if(identifier.compare("f") == 0)
{
std::string face;
ss >> face;
Face newFace;
while(!ss.fail())
{
std::vector<std::pair<int, bool> > vec3 = loadFace(face);
newFace.addVertex(vec3[0].first);
if(vec3[1].second)
{
newFace.addTexCoord(vec3[1].first);
}
if(vec3[2].second)
{
newFace.addNormal(vec3[2].first);
}
ss >> face;
}
for(int i = 0; i < 3; i ++)
{
int vertexIdx = newFace.getVertex(i);
Vertex vert = vertices[vertexIdx];
triplet<float, float, float> normal = normals[newFace.getNormal(i)];
vert.addNormal(normal.first, normal.second, normal.third);
vertices[vertexIdx] = vert;
}
faces.push_back(newFace);
}
}