# swf_lookat

(PHP 4)

swf_lookat — Define a viewing transformation

### Description

void swf_lookat ( float `$view_x` , float `$view_y` , float `$view_z` , float `$reference_x` , float `$reference_y` , float `$reference_z` , float `$twist` )

Defines a viewing transformation by giving the viewing position and the coordinates of a reference point in the scene.

### Parameters

`view_x`

  x-coordinate for the viewing position

`view_y`

  y-coordinate for the viewing position

`view_z`

  z-coordinate for the viewing position

`reference_x`

  x-coordinate for the reference point

`reference_y`

  y-coordinate for the reference point

`reference_z`

  z-coordinate for the reference point

`twist`

  Controls the rotation along with viewer's z axis.

### Return Values

No value is returned.