Описание
bool
ps_arc ( resource psdoc, float x, float y, float radius, float alpha, float beta )
Draws a portion of a circle with at middle point at
(x, y). The arc starts at an
angle of alpha and ends at an angle of
beta. It is drawn counterclockwise. The subpath added
to the current path starts on the arc at angle alpha
and ends on the arc at angle beta.