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# swf_lookat

(PHP 4 >= 4.0.0)

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.

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