dynamically calculating a "watery" surface

Crispy · 2003-01-10T16:55:58

Hello, I admit the subject might be slightly misleading in this case regarding what I''m about to describe: I need to create a lens effect (the eye-lens, not the lens flare) that would distort the viewport so that it would seem like you''re underwater. I figured the best way to do this would be to precalculate a series of texture coordinates, tessellate the screen and overdraw it with the fragments "morphed" into a watery effect. Everything else is doable here for me, except for the math - a little handicap of mine. The effect should be something like, when looking down on a relatively calm water surface, seeing the waves slowly undulate. I''m leaving pretty much to imagination here as I can''t really explain it much better, but if someone does understand what I''m thinking, I''d appreciate some guidance if at all possible. If the above description is too off, I''ll try and come up with a picture thaugh I don''t really know where I''d be able to get one Thanks in advance, Crispy

Math and Physics Programming

Started by Crispy January 06, 2003 04:16 PM

10 comments, last by Crispy 22 years, 1 month ago

Crispy

Author

556

January 09, 2003 01:09 PM

Sounds interesting. Is there any DSP study related to that by any chance? Sounds rather probable to me (and difficult). I had statistics and probabilty last year and I was flat on my back - seems like that wasn''t the worst there is after all

Crispy

"Literally, it means that Bob is everything you can think of, but not dead; i.e., Bob is a purple-spotted, yellow-striped bumblebee/dragon/pterodactyl hybrid with a voracious addiction to Twix candy bars, but not dead."- kSquared

grhodes_at_work

1,385

January 10, 2003 04:55 PM

quote:
Original post by Crispy
hmm - must look harder - i''ve browsed the developers'' site quite bit. incidentally, are you referring to opengl or dx (i''ve never dealt with dx - is there a dx developers site at all?)

http://developer.nvidia.com/view.asp?IO=vertexprogram_refraction

I guess this was done with a vertex program (GeForce hardware), in combination with a cubic environment map. There is another demo somewhere there as well, which showed a planar, bumpy but transparent plastic sheet, and you could see through it. Pretty cool.

Graham Rhodes
Senior Scientist
Applied Research Associates, Inc.

Graham Rhodes Moderator, Math & Physics forum @ gamedev.net

dynamically calculating a "watery" surface

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dynamically calculating a "watery" surface

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