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.