TRANSFORMM

THE BOX'S MAIN HELP:
This function transforms the input point, PP from the "FROM" 
coordinate system and then through matrix M.
The available coordinate systems are: "world", "camera",
"object", "shader", "screen", "NDC" and "raster".

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

M (input):
The point is transformed through this matrix.
The default is the identity matrix.

PP (input):
The point to be transformed.
The default is the surface point, P.

OUT (output):
This function transforms the input point, PP from the "FROM" 
coordinate system and then through matrix M.
The available coordinate systems are: "world", "camera",
"object", "shader", "screen", "NDC" and "raster".

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