Real-Time Physics Simulation Forum

Re: Regarding strain based dynamics [DONE]

2016-03-21T10:29:11+00:00

Dear all,
Sorry to revive an old thread but I think this is probably the right place to add this. Now that the book has been published, my strain based dynamics code is available from the Game Engine Gems 3 book's online page

EDIT: For those who get an error (no min function in std) while compiling TetrahedralMesh project, please include header after all glm headers.

Statistics: Posted by mobeen — Mon Mar 21, 2016 10:29 am

Re: Regarding strain based dynamics [DONE]

2015-06-06T07:43:10+00:00

Hi johnson,
Thanks for the interest. I have a lot of things to change in the next release of OpenCloth. I am currently looking into how to accomplish rudimentary collision and self collision detection using ozcollide library. Once this part is done, I will update the OpenCloth github repository. I need some more time to work on it as I am busy with other stuff in parallel.

Thanks,
Mobeen

Statistics: Posted by mobeen — Sat Jun 06, 2015 7:43 am

Re: Regarding strain based dynamics [DONE]

2015-06-04T15:33:09+00:00

Can you post a update or the files you used to strain based dynamics many of us would love to use it

Statistics: Posted by johnsonalpha — Thu Jun 04, 2015 3:33 pm

Re: Regarding strain based dynamics [DONE]

2015-05-14T08:31:16+00:00

Some more update. I have also managed to implement Barycentric mapping on top of strain based dynamics to apply the tetrahedral deformation to the surface mesh.

Statistics: Posted by mobeen — Thu May 14, 2015 8:31 am

Re: Regarding strain based dynamics [DONE]

2015-05-13T17:11:27+00:00

That's nice korzen303. Keep me informed with ur developments.

Statistics: Posted by mobeen — Wed May 13, 2015 5:11 pm

Re: Regarding strain based dynamics [DONE]

2015-05-13T14:18:47+00:00

Well done Mobeen, looks really good!

Looking forward to grab the sources. I have partially ported the OpenCloth to Unity3D.
I will release the sources (+ Position Based Fluids on the GPU (DX11) when I am done, probably in the summer.

Bw

Korzen

Statistics: Posted by korzen303 — Wed May 13, 2015 2:18 pm

Re: Regarding strain based dynamics [DONE]

2015-05-13T13:51:06+00:00

OK thanks to help by JP, I was able to implement strain based dynamics both for triangular and tetrahedral objects.

Here is the snapshot of using strain based dynamics with tetrahedral mesh

And here is the snapshot of using strain based dynamics with triangular mesh

I will release the sources with the next OpenCloth update.

Statistics: Posted by mobeen — Wed May 13, 2015 1:51 pm

Re: Regarding strain based dynamics

2015-04-29T16:18:57+00:00

Hi JP,
Nope I have not been able to finish it yet. If possible could you please share your sources by emailing them on my NTU email address.

Thanks,
Mobeen

Statistics: Posted by mobeen — Wed Apr 29, 2015 4:18 pm

Re: Regarding strain based dynamics

2015-04-24T02:19:46+00:00

Hi,
The denominator is the weighted sum of squared length of delpkS_ii. I calculated the sum of weights (invSum) then did a dot product of delpkS_ii with itself since that should give me the squared length of delpkS_ii.

Hi Mobeen,

Have you solved your problem?
Recently I implemented a simple 2D version (deformation in 2D plane only, so there is no 'material coordinates' part and bending constraints) and a 3D version as well.
And both are working well using the formulas in the paper.

Sincerely,
Jianping

Statistics: Posted by kxiaocai — Fri Apr 24, 2015 2:19 am

Re: Regarding strain based dynamics

2015-04-03T07:19:04+00:00

Hi Mobeen,

are you planning to add your Strain Based Dynamics implementation to OpenCloth? That would be great.

I am looking at implementing the tetrahedral constraints presented in this paper for my medical simulator. Maybe you have got ideas for this as well?

Cheers

Hi korzen,
Yeah this will be integrated in the opencloth project. Moreover there have been some really good progress in the other integrators for instance, the IMEX integrator has been completely rewritten and it is performing really well. I will update the repository soon but before that i need to finish the strain based dynamics approach.

I have already emailed the SBD paper author regarding this error but he has not replied yet. Currently I have managed to finish the bending constraint but the triangle constraint is not done yet. Tetrahedral will be the next logical step after this is finished.

Statistics: Posted by mobeen — Fri Apr 03, 2015 7:19 am