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Prisms/Refraction

Started by Lingmops Feb 14, 2005 at 7:21 AM 3 replies 1.3k views

Original Post

Feb 14, 2005 at 7:21 AM

Hi, I know this is probably me trying to run before I can walk, but can openGL handle refraction? I want to create prism objects that warp what the viewer sees behind them. I've tried looking around but I cannot find anything about this kind of thing anywhere. Is this a painless thing that I do not know how to do, or a major job of ultra-difficulty? I understand the basic physics of how refraction works, I jsut have *no* idea ow to implement it... [Edited by - Lingmops on February 14, 2005 12:58:49 PM]

zedzeek

164

zedzeek

Feb 14, 2005 at 2:16 PM

see the nvidia developer site theres a couple of examples

angrybob

Feb 15, 2005 at 5:05 AM

just a case of render to texture and some fragment shader trickery

neonoblivion

Feb 15, 2005 at 1:53 PM

Isn't it just rendering to a tex then finding the uv for the obj you want to render and applying the rendered scene as a tex for the obj?

vincoof

Feb 17, 2005 at 3:25 PM

Exact refraction can't be achieved with today's hardware on arbitrary meshes.
Today's implementations are either texture tricks or handle very simple cases like theorically flat water surfaces.

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