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/*
 *  off_load.cpp
 *  GEL
 *
 *  Created by J. Andreas Bærentzen on 16/02/09.
 *  Copyright 2009 __MyCompanyName__. All rights reserved.
 *
 */
#include <fstream>
#include "off_load.h"
#include "HMesh/Manifold.h"
#include "build_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;
                
                int NF, NV, NE;
                
                ifs >> NV >> NF >> NE;
                
                vector<Vec3f> vertices(NV);
                for(int i=0;i<NV;++i)
                        ifs >> vertices[i];
                
                vector<int> faces(NF);
                vector<int> indices;
                for(int i=0;i<NF;++i)
                {
                        int     verts_in_face;
                        ifs >> verts_in_face;
                        faces[i]=verts_in_face;
                        for(int j=0;j<verts_in_face;++j)
                        {
                                int idx;
                                ifs >> idx;
                                indices.push_back(idx);
                        }
                }
                build_manifold(m, NV, &vertices[0], NF, &faces[0], &indices[0]);
                return true;
        }
}