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From: coy@ssc-vax (Stephen B Coy)
Newsgroups: comp.graphics
Subject: Re: Depth Cueing
Message-ID: <3713@ssc-bee.ssc-vax.UUCP>
Date: 14 Mar 91 21:00:21 GMT
References: <9103132039.AA00198@enuxha.eas.asu.edu>
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Reply-To: coy@ssc-vax.UUCP (Stephen B Coy)
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Organization: Boeing Aerospace & Electronics
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In article <9103132039.AA00198@enuxha.eas.asu.edu> hollasch@enuxha.eas.asu.edu (Steve Hollasch) writes:
>a linear interpolation between the two endpoints.  This approach isn't
>quite accurate, though, because the change in distance to the viewpoint is
>not linearly related to distance along the edge (though it's probably good
>enough for approximation).

The relationship between screen space and depth is inversely
proportional.  What you want to do is calculate 1/depth at each
vertex and linearly interpolate.  This also appears when doing a
z-buffer type renderer.

stephen coy
coy@ssc-vax.UUCP

				BDIF