Php/docs/function.ps-arc
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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。
