Hi, I was wondering if any of you know where I can download example source code for 3D metaballs using the C language, and Linux platform (plus OpenGL/glut of course)? It''s quite important that it''s not DOS and/or C++... I''d prefer if it had extensive commenting too, but I''ll probably survive without it. Thanks in advance -- Joachim Blaabjerg styx@SuxOS.org www.SuxOS.org

I had no idea what a metaball was (I thought you said meatball at first). So I googled it.

This article has some generic code you might find interesting

http://www.gamasutra.com/features/20000523/lander_01.htm


If you are just starting out with Linux + OpenGL then have a look at the SDL library (sort of a cross platform Direct X) it really simplifies things.

http://www.libsdl.org/

Cheers

Keef



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glDisable(WORK);
glEnable(GL_CODING);

Look for the marching cubes algorithm. Platform and API should not be an object. Representation and process are all that matter.

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Thanks to Kylotan for the idea!

Hmm... so metaballs are volumetric data that can be fed to a volume renderer algorithm? I thought they were surfaces.

quote:

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Hmm... so metaballs are volumetric data that can be fed to a volume renderer algorithm? I thought they were surfaces

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Yes, they are volume data. But the standard rendering method is to create an isosurface at a certain value threshold around the 3D data set (that''s what the marching cubes algorithm does), and tesselate this surface. Result is a standard tri-mesh.

BTW: Anyone knows what the marching cube patent is doing ? Still an issue ?

/ Yann

Thanks people, I found what I was looking for

--
Joachim Blaabjerg
styx@SuxOS.org
www.SuxOS.org