cr->x += ((float) cr->ys * cos(cr->t * M_PI/180));
cr->y += ((float) cr->ys * sin(cr->t * M_PI/180));
cr->x += ((float) cr->xs * cos(cr->t * M_PI/180 - M_PI / 2));
cr->x += ((float) cr->ys * cos(cr->t * M_PI/180));
cr->y += ((float) cr->ys * sin(cr->t * M_PI/180));
cr->x += ((float) cr->xs * cos(cr->t * M_PI/180 - M_PI / 2));