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/*
 *  off_save.cpp
 *  GEL
 *
 *  Created by J. Andreas Bærentzen on 17/02/09.
 *  Copyright 2009 __MyCompanyName__. All rights reserved.
 *
 */


#include <fstream>
#include <iostream>
#include <string>
#include "off_save.h"
#include "HMesh/FaceCirculator.h"

namespace HMesh
{
        using namespace std;
        using namespace CGLA;
        using namespace HMesh;
        
        bool off_save(const std::string& filename, Manifold& m)
        {
                ofstream os(filename.data());
                if(os.bad()) return false;
                
                os << "OFF " << endl;
                os << m.no_vertices() << " " << m.no_faces() << " " << m.no_halfedges()/2 << endl;
                
                int k=0;
                vector<int> touched_vals(m.no_vertices());
                for(VertexIter vi = m.vertices_begin(); vi != m.vertices_end(); ++vi,++k)
                {
                        touched_vals[k] = vi->touched;
                        vi->touched = k;
                        Vec3f p = vi->pos;
                        os << p[0] << " " << p[1] << " " << p[2] << endl;
                }
                for(FaceIter fi = m.faces_begin();fi != m.faces_end(); ++fi)
                {
                        std::vector<int> verts;
                        for(FaceCirculator fc(fi);!fc.end();++fc)
                        {
                                verts.push_back(fc.get_vertex()->touched);
                        }
                        os << verts.size() << " ";
                        for(size_t i=0;i<verts.size();++i)
                        {
                                os << verts[i] << " ";
                        }
                        os << "\n";
                }
                k=0;
                for(VertexIter vi = m.vertices_begin(); vi != m.vertices_end(); ++vi,++k)
                        vi->touched = touched_vals[k];
                return true;
        }
        
}