dpap Posted December 12, 2014 Share Posted December 12, 2014 How can I inflate a cloth object (a tube)? I found no inner pressure attribute on the cloth object. And also can wires interact with cloth? Quote Link to comment Share on other sites More sharing options...
pelos Posted December 18, 2014 Share Posted December 18, 2014 multi solver with cloth and sop solver, where inside the sopsolver you put a peak sop to push the geometry,? Quote Link to comment Share on other sites More sharing options...
dpap Posted December 18, 2014 Author Share Posted December 18, 2014 (edited) Thank you for your answer Pelos. It works theoretically but after some frames things get really ugly. So practically it does not work I am afraid. inflate.hip Edited December 18, 2014 by dpap Quote Link to comment Share on other sites More sharing options...
eetu Posted December 18, 2014 Share Posted December 18, 2014 Instead of setting a new P outside of the solver, it should be much nicer to set a targetv or targetP for the solver and let it do it's thing. Quote Link to comment Share on other sites More sharing options...
eetu Posted December 18, 2014 Share Posted December 18, 2014 Here's an example. Even though the stretch stiffness is quite low, it starts to fight back at some point. ee_inflate.mov inflatee.hip 6 Quote Link to comment Share on other sites More sharing options...
avak Posted January 9, 2015 Share Posted January 9, 2015 Here's an example. Even though the stretch stiffness is quite low, it starts to fight back at some point. inflate.jpg Hi eetu, thanks for the example, can you please explain "attribcreate_targetV' in sopsolver , why the calss is set to vertex not point? what is the different in DOP Thanks Quote Link to comment Share on other sites More sharing options...
eetu Posted January 9, 2015 Share Posted January 9, 2015 If you look at the geometry data in DOPs (with a spreadsheet or a detail view pane) you can see that the targetv and targetP normally created by the solver are vertex attributes, not point attributes. We want to override those values, so we need to write to vertex attributes. Quote Link to comment Share on other sites More sharing options...
j00ey Posted January 10, 2015 Share Posted January 10, 2015 (edited) I had a really hard time doing some inflating cloth recently. I was trying to remake some old footage from the 60's of Project Echo [a large balloon made of very thin silvery material inflating in space]. What I ended up doing was making a rough animated version in SOPs, then using that as target geometry in DOPs, with some forces and so on. The main problem I had was that being cloth, it can't really appear to stretch very much, else it would be more like bubblegum or something. So right from the beginning it has to appear that all the geometry is there, creased and folded up which of course isn't really feasible. I'd be interested to hear your progress with your project. This was my end result - And this is a different treatment of the end of the shot... Edited January 11, 2015 by j00ey 1 Quote Link to comment Share on other sites More sharing options...
Pancho Posted March 7, 2016 Share Posted March 7, 2016 Mmmh. The inflatee file doesn't seem to work anymore in H15. The sphere doesn't inflate at all. Anybody an idea? Quote Link to comment Share on other sites More sharing options...
Pancho Posted May 9, 2016 Share Posted May 9, 2016 Anybody? I still don't get how to apply a force, like an inflate force, to the simulation on a per point basis. Could somebody update the .hip so that it works again? Thanks in advance! Quote Link to comment Share on other sites More sharing options...
eetu Posted June 22, 2016 Share Posted June 22, 2016 (edited) For some reason seems like the targetP attribute needs to be a point attribute these days. (Even though the documentation says point or vertex). Change AutoDopNetwork->sopsolver->attribcreate_targetV->Class from vertex to point and it starts inflating again. Looks like the stiffnesses have changed in the solvers, so re-tweak. Edited July 1, 2016 by eetu 2 Quote Link to comment Share on other sites More sharing options...
Benoit Robert Posted August 25, 2016 Share Posted August 25, 2016 Thanks eetu, This creates an inflation as expected. Do you have an idea how we could keep the same volume as on first frame? (Inflating or deflating along the sim). Quote Link to comment Share on other sites More sharing options...
NNois Posted February 17, 2017 Share Posted February 17, 2017 Hi, The inflatee.hip file do inflate if we change vertex to point but the balloon is going up in the air... ! What's happening exactly ? Quote Link to comment Share on other sites More sharing options...
trzanko Posted February 20, 2017 Share Posted February 20, 2017 Hi everyone, I figured out a nice way to suck air out of a piece of cloth, doing the opposite would likely inflate it. I simply advect the point along the gradient of the sdf. If you subtract the volumes of your collision objects from the volume of your cloth object the points will "collide" as in they won't advect into the collision objects. Further, you can calculate the length of the advection and if below a threshold you can tell it not to advect at all, this would avoid wiggle. Here's the example of my shrink wrap inspired by more and more, it's not on a cloth sim yet but it works in sops! It's a sphere shrink wrapping around several collision spheres within it. Let me know if you have any questions! I've been meaning to do this process on a cloth object, if there's interest I'll make it a priority and share something soon! 3 Quote Link to comment Share on other sites More sharing options...
Terisan Posted June 4, 2017 Share Posted June 4, 2017 (edited) Doesn't seem to work in H16. Data in the DOPs seems to be a bit different. Any idea how to make it work? Edit. Aaa it works after I changed the cloth object to newer one. Settings need some re-tweaking though. Edited June 16, 2017 by Terisan Quote Link to comment Share on other sites More sharing options...
lemmingsammy Posted June 16, 2017 Share Posted June 16, 2017 Did you get this to work? Im really struggling with this. Im not really one to ask for a scene file but it would really help. Quote Link to comment Share on other sites More sharing options...
adrianr Posted June 16, 2017 Share Posted June 16, 2017 2 hours ago, lemmingsammy said: Did you get this to work? Im really struggling with this. Im not really one to ask for a scene file but it would really help. Not sure what the old settings were relative to what these are now, but all I did was swap out the cloth object for the new one, put the stretch stiffness waaaay down, added some 'Target Strength' in the 'Deformation' tab (so targetP does something), and change the class on the attribute create in the sop solver from vertex to point. inflatee_H16.hip 1 Quote Link to comment Share on other sites More sharing options...
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