void defineShapes(Shapes *S) {
// simplify contours
vector<vector<Point> > contours_poly( contours.size() );
for( int i = 0; i< contours.size(); i++ ) {
approxPolyDP( Mat(contours[i]), contours_poly[i], 1.1, true );
}
RNG rng(12345);
for( int i = 0; i< contours.size(); i++ ) {
PolyLine *PL = new PolyLine();
PL->setPenColor(0,0,0);
if (use_random_colors) { PL->setPenColor(rng.uniform(100,200),rng.uniform(100,200),rng.uniform(100,200)); }
if (contours_poly[i].size()>min_contour_length) {
// printf("Contour:%i [%lu points]\n",i,contours_poly[i].size());
for (int j=0; j<contours_poly[i].size();j++) {
//printf("(%i,%i)",contours[i][j].x,contours[i][j].y);
//if (j!=contours_poly[i].size()-1) { printf(","); }
PL->addPoint(contours_poly[i][j].x,contours_poly[i][j].y);
}
S->addShape(PL);
//printf("\n");
}
}
}
