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Posted 11 June 2012 - 04:46 AM
Well I'm trying to make volumetric clouds but I have no idea where to start.. Does anyone know a good tutorial how to make them or suggest a commercial free library that could achieve that more easily with out spending weeks to code it Also I don't want anything too cpu intensive... Just something simple
They don't have to be really realistic or anything but I want to fly thought them, and change how dense they are etc.
I've made simple clouds in OpenGl and they look like this:
I like how they look, i use perlin noise formula to generate them so they are different each time, and I can adjust how dense they are.. the only problem is that it's just a plane..
So I definitely need new approach to this
Well what I am trying in future is weather system, So i could get rain, thunderstorms etc
Thanks so much for your time and help
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Posted 11 June 2012 - 05:11 AM
Edited by larspensjo, 11 June 2012 - 05:12 AM.
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Posted 11 June 2012 - 09:27 AM
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Posted 11 June 2012 - 04:21 PM
Perhaps the simplest solution is going from 2D to 3D Perlin Noise.
I would suggest using billboard sprites as dpadam450 said. I'd recommend reading two papers, "A Simple, Efficient Method for Realistic Animation of Clouds" by Yoshinori Dobashi (PDF), as he describes a way to represent cloud volumes. The second paper is on the actual billboard sprites, "Real-Time Cloud Rendering" by Mark Harris (PDF).
If you want really nice clouds, try http://wiki.patapom.com/index.php/Clouds. It the most extensive documentation on clouds I've found to date, but it is very complex. Good luck.