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Martin Perry

OpenGL Difference between Tiled Volume Resources & Sparse Volume Texture and sample code

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I have cam across these two terms in new DirectX - Tiled Volume Resources and Sparse volume texture.  From the descrition, they both seems same to me.. is this just another name for the same thing?

 

Another thing is, I am unable to find sample OpenGL code for either of technique. Is there some sample or some other name maybe?

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They are the same just different names.

DirectX calls it 'Tiled resources' while OpenGL calls it 'Sparse textures' 

The volume part of the name indicates that you want tiled/space 3D textures. For DirectX this requires a different feature level (see here) while the OpenGL extension convers both 2D and 3D textures (see the spec and the followup extension spec)

 

I think the ogl sample pack has some sparse samples (not sure for 3D volumes) and tinySceneGraph has a good starting point

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