Oh. And in this case, w'=z, right? So, is that to say I divide the x and y components by z?
Is there not a matrix that does all this stuff itself?
Thanks, ozo
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Perspective matrix
Take a look at the last matrix on this page please:
http://www.codeguru.com/cp
I'm not clear what it actually does, despite having read through the article. I thought that the idea of it was to give your scene perspective - that is, the further away the vertex, the closer to the origin it appears on the screen. However, as P_02 and P_12 are both zero, the resulting x and y coordinates cannot depend on z... So in what way does this create perspectives?
(In fact, I've tested this matrix, and as suspected, it doesn't seem to produce any perspectives)
Thanks
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by: ozoPosted on 2009-08-30 at 16:43:06ID: 25219870
It uses homogeneous coordinates, so that the coordinates are divided by w