int main(int argc, char* argv[])
{
// check if all required arguments are present
if (argc < 7)
{
cerr << "Usage: " << argv[0] << " xMin xMax yMin yMax xRes yRes" << endl;
return 1;
}
// 1:xMin 2:xMax 3:yMin 4:yMax 5:xRes 6:yRes
Bitmap canvas( atof(argv[1]), atof(argv[2]), atof(argv[3]), atof(argv[4]) \
, atoi(argv[5]), atoi(argv[6]) );
// parse drawing commands from standard input
Image2 *image = parse_image(cin);
// for each polyline
for (Image2::iterator it1 = image->begin();
it1 != image->end();
it1++)
{
if ((*it1)->begin() == (*it1)->end())
continue;
Vec2 *v = (*it1)->front();
// for each vertex i, 2 <= i <= N
for (Polygon2::iterator it2 = ++((*it1)->begin());
it2 != (*it1)->end();
it2++)
{
// draw a line between vertex i-1 and vertex i
PixelCoord xy1 = canvas.ndc_to_pixel( (*v)[0], (*v)[1] );
v = (*it2);
PixelCoord xy2 = canvas.ndc_to_pixel( (*v)[0], (*v)[1] );
canvas.draw_pixel(bresenham(xy1,xy2));
}
}
canvas.print_ppm(cout);
return 0;
}
