Applying lookup tables as fragment shader based texture lookups

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Replies: 1 - Last Post: July 14, 2010 22:07
by: Bergtroll
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Posted: July 14, 2010 10:52 by Bergtroll

Before I started working with VisAD I experimented with some fragment shader based application of lookup tables as explained in some literature. I searched the library for the usage of Shader programms but did not find any. Am I guessing right that color table is applied to data before uploading it to the GPU? At which place might it be possible and a good idea to implement a shader based lookup table for real-time coloring of depictions (by only exchanging the lookup map stored as lookup texture in GPU memory and accessed by a fragment shader)?

Posted: July 14, 2010 22:07 by Bergtroll

Quoted from VisAD mailing list, Answer from Tom Rink, 14.07.2010, 15:36

Using byReference rendering, and a smart analysis of what work needs to be done on a 'doTransform', we're getting pretty close to this kind of capability while staying away from GPU specifics. I'm not sure how portable shader programming is.

Replies: 1 - Last Post: July 14, 2010 22:07
by: Bergtroll
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