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/* ----------------------------------------------------------------------- *

 * This file is part of GEL, http://www.imm.dtu.dk/GEL

 * Copyright (C) the authors and DTU Informatics

 * For license and list of authors, see ../../doc/intro.pdf

 * ----------------------------------------------------------------------- */

#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;

        }

        else return false;

        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<int> faces(NF);

        vector<int> indices;

        for(size_t 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);

            }

        }

        m.build(NV, reinterpret_cast<float *>(&vertices[0]), NF, &faces[0], &indices[0]);

        return true;

    }

}