swf_lookat
(PHP 4)
swf_lookat — Define a viewing transformation
Description
void swf_lookat
( double $view_x
, double $view_y
, double $view_z
, double $reference_x
, double $reference_y
, double $reference_z
, double $twist
)
The swf_lookat() function defines a viewing transformation by giving the viewing position (the parameters view_x , view_y , and view_z ) and the coordinates of a reference point in the scene, the reference point is defined by the reference_x , reference_y , and reference_z parameters. The twist controls the rotation along with viewer's z axis.