Re: 2D 3D projection question

[James W. W. <ja...@wr...>]

Keith Wiley <kw...@cs...> wrote:

>Can I easily take a pixel coordinate and determine which 3D object is
>under that pixel, in other words which 3D object (or actual triangle or
>trimesh I suppose) is shallowest in the z-buffer at the pixel's location?
>
>I know Open-GL has routines for this sort of thing.  How would this be
>done in QD3D or Quesa?  Or can it not easily be done?

In QD3D/Quesa that's called picking.  See the "Pick Objects" chapter 
in the QD3D manual.
-- 
   James W. Walker, ScriptPerfection Enterprises, Inc.
   <http://www.write-brain.com/>