Parameters

dist

The distance between the viewpoint to the world space origin.

azimuth

Defines the azimuthal angle in the x,y coordinate plane, measured in distance from the y axis.

incidence

Defines the angle of incidence in the y,z plane, measured in distance from the z axis. The incidence angle is defined as the angle of the viewport relative to the z axis.

twist

Specifies the amount that the viewpoint is to be rotated about the line of sight using the right hand rule.