Querying

bool is_circular (void)

const function

Returns true if the Circle is circular, otherwise false. Certain transformations, such as shearing and scaling, can cause Circles to become non-circular. Circle c(origin, 3, 90); cout << c.is_circular(); -| 1 Circle d = c; d.shift(2.5); d.scale(2, 3); cout << d.is_circular(); -| 0 Fig. 176.

real get_radius (void)

Inline function

Returns radius.

real get_diameter (void)

Inline function

Returns 2 * radius.