#include <string>
#include <vector>
#include <iostream>
#include <fstream>

#include <cstdlib>
#include <cassert>

#include "vec.h"
#include "scene.h"

#define DEBUG

using namespace std;

void mkppm(vector< vector<int> > A, string fname)
{
  ofstream out(fname.c_str());
#ifdef DEBUG
	cout << "P3 " << A[0].size() << " " << A.size() << " 255" << endl;
#endif
  out << "P3 " << A[0].size() << " " << A.size() << " 255" << endl;
  for (int i=0; i<A.size(); ++i)
  {
    for (int j=0; j<A[0].size(); ++j)
      out << (A[i][j] >> 16) << " "<< ((A[i][j] >> 8) & 255) << " " << (A[i][j] & 255) << "  ";
    out << endl;
  }
  out.close();
}

void asciiDump(vector< vector<int> > A)
{
  for (int i=0; i<A.size(); ++i)
  {
    for (int j=0; j<A[0].size(); ++j)
    {
      if (A[i][j] > 0)
        cout << "*";
      else
        cout << " ";
    }
    cout << endl;
  }
}

int main(int argc, char **argv)
{
  if (argc < 4)
  {
    cout << "Usage " << argv[0] << " <width> <height> <scene file>" << endl;
    exit(1);
  }
  int w = atoi(argv[1]);
  int h = atoi(argv[2]);
  string scn(argv[3]);

  // make the scene
  Scene sc(scn);

  // setup the view

  vector<vector< int > > A(h, vector<int>(w,0) );

  double factor = (double)h/(2.0*tan(60*3.14159/360.0));
  for (int i=0; i<h; ++i)
    for (int j=0; j<w; ++j)
      A[i][j] = sc.rayTrace( (-double(w)/2 + 0.5 + j)/factor,
					                   (-double(h)/2 + 0.5 + i)/factor);

  mkppm(A,"blah.ppm");
  return 0;
}