ps_arc
(PECL ps >= 1.1.0)
ps_arc — Draws an arc counterclockwise
说明
ps_arc (
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 counterclockwise (use ps_arcn() to draw clockwise). The subpath added to the current path starts on the arc at angle alpha
and ends on the arc at angle beta
.
参数
-
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 start angle given in degrees.
-
beta
-
The end angle given in degrees.
返回值
成功时返回 TRUE
, 或者在失败时返回 FALSE
。