swf_perspective
(PHP 4, PECL)
swf_perspective -- Define a perspective projection transformation
说明
void
swf_perspective ( float fovy, float aspect, float near, float far )
Defines a perspective projection transformation.
注意:
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.
参数
fovy
A field-of-view angle in the y direction.
aspect
The aspect ratio of the viewport that is being drawn onto.
near
The near clipping plane.
far
The far clipping plane.