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# ps_arc

(PECL)

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()

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