cwalrus Posted October 25, 2015 Share Posted October 25, 2015 Hi - Could someone explain what VDB and SDF are, in plain english? I thought they were different types of volumes, but I see odd terminology in the help file that seems to combine them: dop_example_keyframedgrains from the docs thanks Quote Link to comment Share on other sites More sharing options...
Jason Posted October 25, 2015 Share Posted October 25, 2015 VDB is a sparse voxel storage format. An SDF is a scalarfield (of distances to a surface) which can by stored within the VDB format, or within the dense voxel format in Houdini simply called "Volumes". 2 Quote Link to comment Share on other sites More sharing options...
f1480187 Posted October 25, 2015 Share Posted October 25, 2015 (edited) I thought they were different types of volumes Fog and SDF are different types of volumes. VDB is a new fast implementation of them, I think it intended to supersede standard Houdini's Volumes, tending to re-create its nodes, although it seems, that it will be subset of them, with some unique features in both implementations. Edited October 25, 2015 by f1480187 Quote Link to comment Share on other sites More sharing options...
mestela Posted October 25, 2015 Share Posted October 25, 2015 Writing this stuff out forces me to understand it better, just blatted down some notes here: http://www.tokeru.com/mayawiki/index.php?title=Houdini#Volumes 5 Quote Link to comment Share on other sites More sharing options...
cwalrus Posted October 26, 2015 Author Share Posted October 26, 2015 holy batman Matt - are you the author of that entire site? Quote Link to comment Share on other sites More sharing options...
mestela Posted October 26, 2015 Share Posted October 26, 2015 Yep. Whenever I learn a thing, I have to write it down, otherwise it's gone within a week. 3 Quote Link to comment Share on other sites More sharing options...
f1480187 Posted October 26, 2015 Share Posted October 26, 2015 This is very well-written and informative notebook. The fact it is maintained by one man is... impressive. Quote Link to comment Share on other sites More sharing options...
RayLeblancArt Posted October 26, 2015 Share Posted October 26, 2015 Writing this stuff out forces me to understand it better, just blatted down some notes here: http://www.tokeru.com/mayawiki/index.php?title=Houdini#Volumes Wow........ I had to toss that in my houdini bookmarks, that is some awesome stuff there. Quote Link to comment Share on other sites More sharing options...
Jason Posted October 26, 2015 Share Posted October 26, 2015 Very cool, Matt. Very cool. Quote Link to comment Share on other sites More sharing options...
mestela Posted October 26, 2015 Share Posted October 26, 2015 Dawww.... you guys.... Quote Link to comment Share on other sites More sharing options...
Aaron Auty Posted October 26, 2015 Share Posted October 26, 2015 Ohh my goodness, greeble! Quote Link to comment Share on other sites More sharing options...
art3mis Posted July 11, 2016 Share Posted July 11, 2016 But VDB, SDF are acronyms for exactly....what? Houdini is an acronym lovers utopia it seems:) 1 Quote Link to comment Share on other sites More sharing options...
Hamp Posted July 11, 2016 Share Posted July 11, 2016 From OpenVDB.org Quote Over the years VDB has been interpreted to mean different things, none of which are very descriptive: "Voxel Data Base", "Volumetric Data Blocks", "Volumetric Dynamic B+tree", etc. In early presentations of VDB we even used a different name, "DB+Grid", which was abandoned to emphasize its distinction from similarly named, but different, existing sparse data structures like DT-Grid or DB-Grid. The simple truth is that "VDB" is just a name. :-) SDF stands for "Signed Distance Field". Quote Link to comment Share on other sites More sharing options...
malexander Posted July 12, 2016 Share Posted July 12, 2016 5 hours ago, eco_bach said: But VDB, SDF are acronyms for exactly....what? Houdini is an acronym lovers utopia it seems:) VDB is actually a third party lib from Dreamworks. I guess they love their acronyms too Volume: Dynamic Blocked is what I believe it stands for. Quote Link to comment Share on other sites More sharing options...
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