ps_arcn
(PECL ps:1.1.0-1.3.5)
ps_arcn — Draws an arc clockwise
說明
bool ps_arcn
( 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 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.
Return值
如果成功則回傳 TRUE，失敗則回傳 FALSE。