- double x1() { double x1, y1, x2, y2; get_bounds(x1,y1,x2,y2); return x1; }
- double y1() { double x1, y1, x2, y2; get_bounds(x1,y1,x2,y2); return y1; }
- double x2() { double x1, y1, x2, y2; get_bounds(x1,y1,x2,y2); return x2; }
- double y2() { double x1, y1, x2, y2; get_bounds(x1,y1,x2,y2); return y2; }
+ double x1() const { double x1, y1, x2, y2; get_bounds(x1,y1,x2,y2); return x1; }
+ double y1() const { double x1, y1, x2, y2; get_bounds(x1,y1,x2,y2); return y1; }
+ double x2() const { double x1, y1, x2, y2; get_bounds(x1,y1,x2,y2); return x2; }
+ double y2() const { double x1, y1, x2, y2; get_bounds(x1,y1,x2,y2); return y2; }