PHP5中文手册·Draws an arc counterclockwise -- 追寻梦想＞编程乐园＞PHP 编程

说明

bool ps_arc ( 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 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

如果成功则返回 TRUE，失败则返回 FALSE。

参见

ps_arcn()


	PHP5中文手册 ps_add_weblink ps_arcn PS PHP Manual ps_arc (PECL ps:1.1.0-1.3.5) ps_arc — Draws an arc counterclockwise 说明 bool ps_arc ( 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 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. 返回值如果成功则返回 `TRUE`，失败则返回 `FALSE`。参见 ps_arcn() ps_add_weblink ps_arcn PS PHP Manual