Simon Gerblich (simong++at++acres.com.au)
Thu, 07 Jan 1999 10:23:22 +1030
Take a look at glFeedbackBuffer. You can use it to get back a list of
all of the polygons in the visible scene. You can then go through each
polygons vertex list and see its x, and y value and its depth and color
value.
Simon
> Hi,
> I want to know whether there is an easy way
> (or a way at all) to find which all triangles are visible
> (at least partialy) in a scene, given a model, viewpoint and direction.
> There are of course methods to intersect line segments of different
> lengths for each pixel, check the closest point, find the corresponding
> triangle etc. That seems to take too long to compute for each view.
> I want to know if there are any faster ways taking advantage of
> some Performer feature or other ...
>
> Thanks in advance!
>
> Anoop.
>
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--
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Simon Gerblich
Acacia Research Phone (08) 8272 9455
153 Greenhill Road Fax (08) 8272 6899
Parkside SA 5063 Int. +61 8 8272 xxxx
mailto:simong++at++acres.com.au
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