ps_arcn
(PECL ps >= 1.1.0)
ps_arcn — Draws an arc clockwise
說明
resource
$psdoc,float
$x,float
$y,float
$radius,float
$alpha,float
$beta): bool
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 clockwise (use
ps_arc() to draw counterclockwise). The subpath added to
the current path starts on the arc at angle beta and
ends on the arc at angle alpha.
參數
-
psdoc -
Resource identifier of the postscript file as returned by ps_new().
-
x -
The x-coordinate of the circle's middle point.
-
y -
The y-coordinate of the circle's middle point.
-
radius -
The radius of the circle
-
alpha -
The starting angle given in degrees.
-
beta -
The end angle given in degrees.
返回值
成功時返回 true， 或者在失敗時返回 false。