VTRANSFORM

THE BOX'S MAIN HELP:

This function transforms the input vector, V from the "FROM" 
coordinate system into the "TO" coordinate system.
The available coordinate systems are: "world", "camera",
"object", "shader", "screen", "NDC" and "raster".
A matrix may also be used to tramsform the vector, V.

FROM (input):

The vector is transformed from this coordinate system.
The default is "current". The available coordinate systems are:
"world", "camera", "object", "shader", "screen", "NDC" and "raster".

TO (input):

The vector is transformed to this coordinate system or by the matrix.
The default is the "shader" coordinate system.  The available coordinate
systems are: "world", "camera", "object", "shader", "screen", "NDC" 
and "raster".  The matrix defaults to the identity matrix.

V (input):

The vector to be transformed into a new space.
The default is the negative incidence vector, -I.

OUT (output):

This function transforms the input vector, V from the "FROM" 
coordinate system into the "TO" coordinate system.
The available coordinate systems are: "world", "camera",
"object", "shader", "screen", "NDC" and "raster".
A matrix may also be used to tramsform the vector, V.

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