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# swf_perspective

(PHP 4 >= 4.0.0)

swf_perspective -- Define a perspective projection transformation

## Description

``void swf_perspective` (float fovy, float aspect, float near, float far)`

The swf_perspective() function defines a perspective projection transformation. The `fovy` parameter is field-of-view angle in the y direction. The `aspect` parameter should be set to the aspect ratio of the viewport that is being drawn onto. The `near` parameter is the near clipping plane and the `far` parameter is the far clipping plane.

> Note: Various distortion artifacts may appear when performing a perspective projection, this is because Flash players only have a two dimensional matrix. Some are not to pretty.

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