sabotage Posted February 1, 2011 Share Posted February 1, 2011 Hello I am trying to get a proper growing of l-system on an object surface. In my case I have an animated human figure and I am trying to grow l-systems around body parts in animation. I cannot use creep or project because the surface is polygonal. I tried with rayhit but it doesn't look right I also tried drawing curves on the surface of the object and then using the curve deformer but it is a little bit slow because my l-system is with too many branches. Can you please give me some ideas on approaches thank you. Quote Link to comment Share on other sites More sharing options...
symek Posted February 1, 2011 Share Posted February 1, 2011 Here you have a hint using uvs (proceed forward in presentation by A. Boyd): http://www.andyboyd3d.com/siggraph_talk/img27.html Quote Link to comment Share on other sites More sharing options...
Macha Posted February 2, 2011 Share Posted February 2, 2011 (edited) Nice link. Here is something inspired by this. The Lsystem sticks for a while and then grows out. Sorry for the messy setup. growlsystem.hip Edited February 2, 2011 by Macha 3 Quote Link to comment Share on other sites More sharing options...
sabotage Posted February 2, 2011 Author Share Posted February 2, 2011 Thank you very very much that is an amazing example Quote Link to comment Share on other sites More sharing options...
symek Posted February 2, 2011 Share Posted February 2, 2011 Nice file, Macha! Quote Link to comment Share on other sites More sharing options...
sabotage Posted February 3, 2011 Author Share Posted February 3, 2011 Is there a way to use the wire solver with this technic as a goal . So that the l-systems fly around and then they snap. I can make this with sdf attractor with softbodies but I cannot preserve the edgelengths of the l-systems. I will post an example on what I am trying to achieve. Quote Link to comment Share on other sites More sharing options...
Ezz Posted February 4, 2011 Share Posted February 4, 2011 Nice link to Andy Boyd. Im trying to replicate his work, but Im a bit puzzled about how he`s laying out the UV`s http://www.andyboyd3d.com/siggraph_talk/img34.html I cant get the nice flat layout that he has. Any hints? Erik Quote Link to comment Share on other sites More sharing options...
hopbin9 Posted February 5, 2011 Share Posted February 5, 2011 Nice link. Here is something inspired by this. The Lsystem sticks for a while and then grows out. Sorry for the messy setup. I don't understand how you got the points to stick to the tree trunk using an AttributeTransfer. I understand that you transferred the P values from the trunk to the l-system, but I don't get how you managed to control it. Quote Link to comment Share on other sites More sharing options...
Macha Posted February 6, 2011 Share Posted February 6, 2011 (edited) You can have some degree of control if you play with blend width, sample count and a smooth sop. About wiresolvers, in principle it should be possible to send the lsystem to a dop network, cling the roots and break them, but in practise it's probably just too heavy and you'll just get a messy setup. Edited February 6, 2011 by Macha Quote Link to comment Share on other sites More sharing options...
Mzigaib Posted February 11, 2011 Share Posted February 11, 2011 Thanks for the techniques and the file Macha, very useful. About Andy´s technique, any idea of How did he procedurally (or not) created the top part of the tree with the extruded brunches? Thanks. Quote Link to comment Share on other sites More sharing options...
sabotage Posted February 12, 2011 Author Share Posted February 12, 2011 Thank you Macha. Yeah I tried with wiresolver but I have a very heavy l system. I am trying something else now converting the l system to softbody and then attracting it to an object using flow vectors along a surface. Quote Link to comment Share on other sites More sharing options...
titor Posted April 21, 2011 Share Posted April 21, 2011 Hello everyone I'm trying to reproduce the L-System growing on surface setup from the Siggraph slides that are on the thread. I used Macha's file to inspire me with the readings from andyboy3d's website. I'm having some trouble reproducing this slide http://www.andyboyd3d.com/siggraph_talk/img39.html So far this is where I'm stuck. If anyone could give me a hint on the next move I would really appreciate it. It seems that my L-system is going up to fast and taht it doesn't wrap around the tree tube. Thanks for your help Quote Link to comment Share on other sites More sharing options...
titor Posted April 21, 2011 Share Posted April 21, 2011 Oops missing hip file testgrow_odforce.hip Quote Link to comment Share on other sites More sharing options...
titor Posted April 22, 2011 Share Posted April 22, 2011 Anyone got any clue ? Thanks Quote Link to comment Share on other sites More sharing options...
anim Posted April 22, 2011 Share Posted April 22, 2011 sure, here is the file. not quite the same as andy's, but something along those lines, I personally don't like point SOP due to cooking speed so I avoided it in this one too testgrow_fix.hip 4 Quote Link to comment Share on other sites More sharing options...
titor Posted April 23, 2011 Share Posted April 23, 2011 sure, here is the file. not quite the same as andy's, but something along those lines, I personally don't like point SOP due to cooking speed so I avoided it in this one too Thanks for your answer, i'll take a look at your file right now. You're really helping me out there. Quote Link to comment Share on other sites More sharing options...
renderedhero Posted January 10, 2016 Share Posted January 10, 2016 This has been a very helpful thread, thank you everyone! Can anyone please explain why my lsystem draws back to the scene origin if i let the time run too long? 1 Quote Link to comment Share on other sites More sharing options...
imran husain Posted April 29, 2016 Share Posted April 29, 2016 how can i add leaf please can any body help me, when i am adding in Lsystem leaf J and K and i do project then my leaf are being destroy. Quote Link to comment Share on other sites More sharing options...
imran husain Posted April 29, 2016 Share Posted April 29, 2016 Hi, i am facing some problems can anyone solve it. Nice link. Here is something inspired by this. The Lsystem sticks for a while and then grows out. testgrow_fix.hip ( i followed this file you can find this file above only i copied and pasted ) i have follow the above links its excellent but when i use modelled leaf its doesn't work only its work circle, sphere and default model are work how can i add leaf please can any body help me, when i am adding in Lsystem leaf J and K and i do project then my leaf are being destroy. Thanx Quote Link to comment Share on other sites More sharing options...
Lunzium Posted May 3, 2017 Share Posted May 3, 2017 Great thread and great help so far! I was wondering if anyone knows where to find some good L-system rules to make Ivy. Having problems understanding the rules properly. Thanks in advance Quote Link to comment Share on other sites More sharing options...
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