converting to screen coords

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leif.stubbfalt++at++enator.se
Tue, 9 Jun 1998 12:49:54 +0100

Hello!

I want to transform a point from world coordinates to screen
coordinates. I know that the first step is to convert the point to
viewing coordinates. I did this by multiply the point by the inverse of
the viewing matrix (I was told that it had to be the inverse). I got the
viewing matrix by pfGetChanViewMat. Is this OK?

After this I multiplied the converted point by the projection matrix. I
got the matrix by pfGetFrustGLProjMat. Is this OK? I guess not, because
the resulting coordinates where not normalized. When transforming I used
pfFullXformPt3. The last step, converting from normalized to screen
coordinates, won't be a problem.

Best regards!
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