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Mishuk
01-06-2003, 12:54 PM
Hi!
Can anyone explain me? What is the use of 3D texture?

Thank you

Halcyon
01-06-2003, 08:11 PM
I don't really know why you would want to use one. But then again i don't really understand them beyond the basics.

I don't know much about 3d Textures but here is what i do know.

In a normal texture map that you put on faces (2d texture map), there are two coordinates. The u and the v. In a 3d texture map, there are three coordinates. The names of those coordinates can be whatever you want...u can use x,y,z if you want. Anyways, the 3d texture maps take up a lot of memory, so 3d texture maps are generated with procedures. Because of that it is also called procedural texturing. Check out this link for a very basic run down of what it is. It is the 6th slide
http://www-courses.cs.uiuc.edu/~cs319/proceduralshading_files/frame.html

chxfryer
01-08-2003, 09:45 PM
i thought 3d texture maps where basically the same as 2d except it contains a height element. An example would be the grass in Tony Hawk pro skater 2x on XBOX.

probably wrong though

roffe
01-09-2003, 03:33 PM
With the new generation of programmable hardware, texture data is less "texture" and more of a global data structure.

A great example would be how the people at stanford used a 3d texture as a scene graph to implement a raytracer on the gpu.
Here is a link, enjoy. http://graphics.stanford.edu/papers/rtongfx/