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Re: Picking

on 12/25/02 12:28 AM, Dan Herman at email@hidden wrote:

> About all you can do is project back into world space via gluUnProject.

I thought about this, however, this still won't return precise data.
GL_SELECT does not return the actual z coordinate of the pick - it only
returns the min/max zbuffer z-coordinate of the polygon in question.
Therefore, unProjecting the screen pick coordinate will only put me in the
ballpark since I do not know the legit z value.

I suppose I could just average the z values I get from GL_SELECT and then
just unproject that. That'll at least get me coordinates that are close as
long as the polygons are small.

-Brian

_________________________________________________________
Brian Greenstone
President & CEO email@hidden
Pangea Software, Inc. http://www.pangeasoft.net
12405 John Simpson Court voice/fax: (512)266-9991
Austin, TX 78732
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 >Re: Picking (From: Dan Herman <email@hidden>)



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