©
本文檔使用 php中文網手册 發布
(PECL ps >= 1.1.0)
ps_arcn — Draws an arc clockwise
$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
.
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.
成功时返回 TRUE
, 或者在失败时返回 FALSE
。