bool collide(int level, Pose *pose);
void horizontal_flip(scalar_t scene_width);
bool collide(int level, Pose *pose);
void horizontal_flip(scalar_t scene_width);
void draw(int thickness, int r, int g, int b, int level, RGBImage *image);
void draw(int thickness, int r, int g, int b, int level, RGBImage *image);