libigl_Martin/writeOFF.h

//
//  IGL Lib - Simple C++ mesh library 
//
//  Copyright 2011, Daniele Panozzo. All rights reserved.

#ifndef IGL_WRITEOFF_H
#define IGL_WRITEOFF_H

#include <Eigen/Core>
#include <string>

namespace igl 
{
    inline bool writeOFF(const std::string fname, const Eigen::MatrixXd& V, const Eigen::MatrixXi& F);
}

// Implementation

// write mesh to an ascii off file
inline bool igl::writeOFF(const std::string fname, const Eigen::MatrixXd& V, const Eigen::MatrixXi& F)
{
    FILE *fp = fopen (fname.c_str(), "w");
  
    
    if (!fp)
    {
        fprintf (stderr, "writeOFF(): could not open file %s", fname.c_str());
      return false;
    }
    
    fprintf (fp, "OFF\n%d %d 0\n",  (int) V.rows(), (int) F.rows());
    
    for (unsigned i = 0; i < V.rows(); i++)
        fprintf (fp, "%f %f %f\n", V(i,0), V(i,1), V(i,2));
    
    for (unsigned i = 0; i < F.rows(); i++)
        fprintf (fp, "3 %d %d %d\n", F(i,0), F(i,1), F(i,2));
    
    fclose (fp);
    return true;
}
#endif