normal2rgb

#include<iostream>
#include<fstream>
#include<iomanip>
#include<sstream>

using namespace std;

int main(int argc, char** argv)
{

    if(argc!=3)
    {
        fprintf(stderr,"Usage: %s\n(1)Input_filename\n(2)Output_filename\n",argv[0]);
        //exit(1);
    }

    ifstream ifs(argv[1]);
    ofstream ofs(argv[2]);
    string line;

    cout << "now converting....wait for a short time" <<endl;

    while(getline(ifs,line))
    {
        float x,y,z;
        float rgb;
        float cu;
        float nx,ny,nz;
        float fnx,fny,fnz;
        int unx,uny,unz;
        //int r,g,b;
        //int r_down,g_down,b_down;

        istringstream is(line);

        is  >> nx >> ny >> nz >> cu >> x >> y >> z >> rgb;
            //printf("%f %f %f\n",x,y,z);
            fnx=(nx+1)*255/2;
            fny=(ny+1)*255/2;
            fnz=(nz+1)*255/2;
            unx=(unsigned char)fnx;
            uny=(unsigned char)fny;
            unz=(unsigned char)fnz;

        //cout<< x <<" "<< y <<" "<<z<<" "<<r_down<<" "<<g_down<<" "<< b_down<<endl;
        ofs<< x <<" "<< y <<" "<<z<<" "<<unx<<" "<<uny<<" "<<unz<<endl;

    }

    ifs.close();
    ofs.close();

    cout << "finished" << endl;

    return 0;
}