PHP 7.1.18 Released

ps_arcn

(PECL ps >= 1.1.0)

ps_arcnDraws an arc clockwise

说明

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.

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 starting 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

  • ps_arc() - Draws an arc counterclockwise

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