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。

参见