VertexW# ( surface,index )

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Ian Thompson (Posted 2004) [#1]

Quote: VertexW# ( surface,index ) Parameters surface - surface handle index - index of vertex Description Returns the texture w coordinate of a vertex OK, I know what U & V are but what is W? P.S. Sorry for the cross post but I was gettin answers that I already know to be wrong in the beginners forum. (Sorry Beaker but this is a legit command that already produces valid data)

Floyd (Posted 2004) [#2]

I think 'reserved for possible future use' is the correct answer. As I recall, VertexW doesn't really return anything useful. It just gives a standard value of 1. This is analogous to ReadPixel in 2D graphics. It tells you the alpha value is 255 ( fully opaque ) even though there really is no alpha support.

Gabriel (Posted 2004) [#3]

Beaker's answer was correct. And since Floyd agreed with him, so is his.

Ian Thompson (Posted 2004) [#4]

The W is for use in 3D textures. Its the Z co-ordinate of the texture used sometimes in procedural textures/shaders or certain file formats TIFF for example.