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A Question on rhw

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I just would like to know what is the result of specifying a rhw value in you vertex format, I understand this is it for objects which have already been transformed (I think), does that mean no world or projection matricies will be applied (give me a break I''m guessing), is this what I would use to draw a HUD or something which is drawn on the screen instead of in the world. Cheers for any light you can shed on the situation. And please if I am completely wrong can you point me in the right direction? Also whats the deal with 2D stuff done with Ortho projection, is this actually 2D or 3D projected differenly> Thanks again in advance X2K PS. I''m going to warn you that I really would like an answer to this question and I am will to piss everyone of and break all forum rules by bumping it up to the top of the list every day until I get a satifactory result, I hope it won''t come to this

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