Re: world 2 screen transformation

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Tom Flynn (flynnt++at++boeing.engr.sgi.com)
Mon, 23 Aug 1999 07:32:22 -0700

Sounds like you're looking for gluProject(). gluUnProject() is also
useful for going the other direction.

man gluProject
man gluUnProject

have fun,
tom

--
"Mongooses are famous for their snake-fighting ability, and are
 almost always victorious because of their speed, agility, and timing
 and also because of their thick coat."


On Mon, 23 Aug 1999, Michael Boccara wrote:


> Hi,
> 
> I know this question has been asked zillions of times, but since I could not 
> find an up-to-date FAQ, I'm asking it again.
> How do you perform the reverse of a channel picking ? in other words, 
> finding the (x,y) position on the screen of a 3D point (x,y,z) in the 3D 
> world ? What is the secret formula ?
> 
> 
> Thanks!
> 
> Mike
> 
> 
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