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/*
 *  off_load.cpp
 *  GEL
 *
 *  Created by J. Andreas Bærentzen on 16/02/09.
 *  Copyright 2009 __MyCompanyName__. All rights reserved.
 *
 */
#include "off_load.h"

#include <fstream>

#include "Manifold.h"

using namespace std;
using namespace CGLA;
using namespace HMesh;
using namespace Geometry;

namespace HMesh
{
        bool off_load(const std::string& filename, HMesh::Manifold& m)
        {
                ifstream ifs(filename.c_str());
                string str;
        if(ifs.good()){
                        ifs >> str;
        }
        if(str != "OFF") {
                        return false;
        }
                
                size_t NF, NV, NE;
                
                ifs >> NV >> NF >> NE;
                
                vector<Vec3f> vertices(NV);
        for(size_t  i= 0; i < NV; ++i){
                        ifs >> vertices[i];
        }
                
                vector<size_t> faces(NF);
                vector<size_t> indices;
                for(size_t i = 0; i < NF; ++i){
                        size_t verts_in_face;
                        ifs >> verts_in_face;
                        faces[i] = verts_in_face;
                        for(size_t j = 0; j < verts_in_face; ++j){
                                size_t idx;
                                ifs >> idx;
                                indices.push_back(idx);
                        }
                }
                m.build(NV, reinterpret_cast<float*>(&vertices[0]), NF, &faces[0], &indices[0]);
                return true;
        }
}