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krol
04-17-2002, 02:23 AM
Hello everybody

Bump mapping - can somebody tell me what is it or where should I look some information about it.

best regards

Marcin

marcus256
04-17-2002, 02:47 AM
Short: It's a trick for making a surface appear more detailed than it really is. For instance, you can use bump mapping to make a single flat quad appear as if it was "bumpy".

The principle is to modify the surface normal over the surface, thus making light contribution vary accross the surface. This can be implemented in many different ways, which approximates the "modified normal" behaviour with varying degrees of accuracy.

For a short intro, see here (http://www.pvrdev.com/doc/f/Bump%20Mapping%20Comparison.htm) and here (http://www.powervr.com/pdf/BumpMapping.pdf)

At the nVidia developer relations site http://developer.nvidia.com/ you an find several documents and demos of bump mapping.



[This message has been edited by marcus256 (edited 04-17-2002).]