NNenov Posted October 6, 2019 Share Posted October 6, 2019 Hi, I was messing around with 3D grids of boxes in the past, as well as low res volumes/vdb but I never figured out how to generate "boxy" volumes, or box grids with interior faces removed, making a compound shape with no interor geometry. Is this generally difficult to achieve? I think my main problem is terminology and difficulty to accurately search for help on the topic. So any help will be appreciated as I try to dive back in! My last attempt was making basic cellular automata with cubes, it gets very heavy if you output a high res grid with all the interior box faces, which you never see anyway. Thanks, Nik Quote Link to comment Share on other sites More sharing options...
Librarian Posted October 6, 2019 Share Posted October 6, 2019 (edited) examples to learn https://zhuanlan.zhihu.com/p/54396666 http://www.tokeru.com/cgwiki/index.php?title=HoudiniVex https://softologyblog.wordpress.com/category/cellular-automata-2/ http://www.vill.ee/entry.php?12-Houdini-Cellular-Automata I use Houdini 16 FUn01.hipnc Edited October 6, 2019 by srletak Quote Link to comment Share on other sites More sharing options...
NNenov Posted October 6, 2019 Author Share Posted October 6, 2019 Hi Srletak, sorry I think you misunderstood me, I already have a cellular automata setup, my problem is generating clean geometry with no interior points/faces, e.g. Quote Link to comment Share on other sites More sharing options...
flcc Posted October 6, 2019 Share Posted October 6, 2019 Would you mean a Box with primitve type in "polygon mesh" or "mesh" mode ? Quote Link to comment Share on other sites More sharing options...
NNenov Posted October 6, 2019 Author Share Posted October 6, 2019 my approach was to use copytopoints, copying a box in Polygon mode, but I am not committed to this, since it yields boxes for every voxel, many interior faces, I'm just curious what is an effective approach to just mesh the surface of a voxel grid Quote Link to comment Share on other sites More sharing options...
ThomasPara Posted October 7, 2019 Share Posted October 7, 2019 Heres a simple try, i dont know what speeds you want. Its a copy inside this one aswell box_volume_01.hip Quote Link to comment Share on other sites More sharing options...
vicvvsh Posted October 7, 2019 Share Posted October 7, 2019 12 hours ago, NNenov said: my approach was to use copytopoints, copying a box in Polygon mode, but I am not committed to this, since it yields boxes for every voxel, many interior faces, I'm just curious what is an effective approach to just mesh the surface of a voxel grid no interior points/faces or use VDB Visualize Tree SOP vdb_visualizetree.hipnc Quote Link to comment Share on other sites More sharing options...
NNenov Posted October 8, 2019 Author Share Posted October 8, 2019 11 hours ago, ThomasPara said: Heres a simple try, i dont know what speeds you want. Its a copy inside this one aswell box_volume_01.hip Thank you Thomas, this seems to work perfectly but I have no idea whats happening in your wrangles, I'll definitely spend some time studying your code. Great! 10 hours ago, vicvvsh said: no interior points/faces or use VDB Visualize Tree SOP vdb_visualizetree.hipnc Thanks vicvvsh, this sort of works but it creates interior geometry, and furthermore the leaf nodes don't seem to align to the point centers: Quote Link to comment Share on other sites More sharing options...
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