Popular Post Activate Posted December 10, 2016 Popular Post Share Posted December 10, 2016 Andy Lomas' work on cellular growth has been really inspiring. He implemented all his code to run on GPUs. I was wondering how hard it would be to do this natively in Houdini. After some contortions, this is what I ended up with: 17 Quote Link to comment Share on other sites More sharing options...
rich_lord Posted December 28, 2016 Share Posted December 28, 2016 Amazing! I tried to implement this recently too, and didn't get anywhere near these results. I guess i'll be the cheeky one ask if you could share a hip file, or maybe an explanation of the steps you took to get it working. Quote Link to comment Share on other sites More sharing options...
Activate Posted January 8, 2017 Author Share Posted January 8, 2017 I found the largest challenge to be cell splitting for which I needed to implement in-order neighbor traversal: https://gist.github.com/provos/4e88a9f13fb7354fa680c7b1d4c907b2 (this may not be the latest code) Let me think about sharing the HIP file. It was a fair bit of work but ultimately nothing particularly special. 5 1 Quote Link to comment Share on other sites More sharing options...
rich_lord Posted January 9, 2017 Share Posted January 9, 2017 Thanks Activate! Totally understand about the hip. In some ways, i'll learn more by doing it myself anyway. Thanks for the code, and congrats on the result! Quote Link to comment Share on other sites More sharing options...
stickman Posted January 9, 2017 Share Posted January 9, 2017 I have no chance of recreating this myself :-D So... share some new morphsogenesii! Quote Link to comment Share on other sites More sharing options...
Popular Post Activate Posted June 12, 2017 Author Popular Post Share Posted June 12, 2017 I finally got around to cleaning up the hip file and have attached it. If you end up using this, please let me know how it's going and share a pointer to your work. The major challenge with writing this in VEX was that VEX does not offer any of the canonical data structures one would use to efficiently implement this. For me, the simulation ends up running out of memory around a 1000 frames. As I am novice to Houdini, I would also appreciate any feedback and comments you might have if you end up taking a look. Enjoy? :-) MorphogensisInVex.hiplc 14 1 Quote Link to comment Share on other sites More sharing options...
monkeybear Posted July 9, 2017 Share Posted July 9, 2017 (edited) coooool greate work Activate Edited July 9, 2017 by monkeybear Quote Link to comment Share on other sites More sharing options...
Thomas Helzle Posted July 14, 2017 Share Posted July 14, 2017 Played with this a bit today and it's quite fascinating. The main code is a bit over my head but I changed the nutritient building from random values to using noise to get less even distribution and played with some octane rendering: Thanks for the file and cheers! Tom 1 Quote Link to comment Share on other sites More sharing options...
Activate Posted July 15, 2017 Author Share Posted July 15, 2017 That looks great. Thanks for sharing. When you look at the paper from Lomas, he also experimented with reaction-diffusion as well as photosensitivity, e.g. nutrients get produced where sunlight reaches. 1 Quote Link to comment Share on other sites More sharing options...
Thomas Helzle Posted July 15, 2017 Share Posted July 15, 2017 Yeah, I saw some of his experiments that start out REALLY interesting looking, almost like a fetus, but most of the time at one point they get overwhelmed by the overall growth (almost like cancer). Would be fascinating to dive into ways to stop that and keep refining those shapes. Basically what nature does after the initial "everything grows" phase where growth becomes limited to detail and intricate features... Otherwise we would probably all be huge blobs or amoebas... ;-) Maybe having a fixed amount of nutrients available and concentrate them on very specific parts? Refinement as goal, not general growth? Cheers, Tom Quote Link to comment Share on other sites More sharing options...
ZeitG Posted August 21, 2017 Share Posted August 21, 2017 (edited) Hey Neils! Hope you are feel great! Inside hip file you shared was "All of this is described in detail in Lomas' paper." Can you share link to this paper? Thank you! p.s.: and, of course, thank you for "hip"sharing! Edited August 21, 2017 by ZeitG Quote Link to comment Share on other sites More sharing options...
Activate Posted August 21, 2017 Author Share Posted August 21, 2017 Here is a link to the paper: http://www.andylomas.com/extra/andylomas_paper_cellular_forms_aisb50.pdf Enjoy. 1 Quote Link to comment Share on other sites More sharing options...
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