fprintf(file, "POLYLINE %i (%li)", p->layer, p->points.size());
fprintf(file, " (%i, %f, %i)\n", obj->color, obj->thickness, obj->style);
fprintf(file, "POLYLINE %i (%li)", p->layer, p->points.size());
fprintf(file, " (%i, %f, %i)\n", obj->color, obj->thickness, obj->style);