libigl_Martin/readOFF.h

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

#ifndef READOFF_H
#define READOFF_H

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

namespace igl 
{
    // read mesh from a ascii off file
    void readOFF (std::string meshfile, Eigen::MatrixXd& V, Eigen::MatrixXi& F)
    {
        int vnum, fnum;
        FILE *fp = fopen (meshfile.c_str(), "r");
        
        if (!fp)
            fprintf (stderr, "readOFF(): could not open file %s", meshfile.c_str());
        
        fscanf (fp, "OFF\n%d %d 0\n",  &vnum, &fnum);
        
        V = Eigen::MatrixXd (vnum, 3);
        F = Eigen::MatrixXi (fnum, 3);
        
        for (unsigned i = 0; i < V.rows(); i++)
            fscanf (fp, "%lf %lf %lf\n", &V(i,0), &V(i,1), &V(i,2));
        
        for (unsigned i = 0; i < F.rows(); i++)
            fscanf (fp, "3 %d %d %d\n", &F(i,0), &F(i,1), &F(i,2));
        
        fclose (fp);
    }
}

#endif