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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