Tilted

The tilted surface is a plane that makes an angle with respect to the x and y axes. The surface is easily defined in terms of the tangent angle between the plane and the X and Y axes:

The tilted surface uses the first two parameters to define the tangents of the x and y angles. This surface is very useful for implementing tilted object and image surfaces, as well as tilted faces on prisms. The tilted surface does not change the local coordinate system, and so should not be used for implementing fold mirrors; use the coordinate break surface instead.

PARAMETER DEFINITIONS FOR TILTED SURFACES

Parameter #	Definition
1	tan (θx)
2	tan (θy)

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