Real-Time Physics Simulation Forum

Hi has any one readed the paper "Interactive Simulation of Elastic Deformable Materials" by martin.servin In chapter 2.4 they propose a new time step method but I can not deduce the formula a*lambada formulateinpaper.png this is my deduce mydeduce.jpg Note the term "1/2 * deltat + B&q...

I have the same question, how to make a robust softbody surface-softbody surface collision algo,and make it suitable for use in the PBD

Actually in my code I find Axis as 1. triangle face normal, 2.Triangle edge-capsule edge , 3.triangle point - capsule edge 4.trignale point - capsule edge point 3 and 4 will have totally 2+2*3 axis but they can be simplified to 3 axis test .in my code i first find the cloest point between first tria...

That's great,Thanks for share,

clauchiorean:

Thanks a lot for the information , By the way do you know how current games couple the IK system with the artists-maded animation ?

Hi clauchiorean:
I am very interseting about the implementation of the project ,what method do you use in the IK solution, I only know the simple cylic coordinate descendt but seems not enough could you refer me the method use in your project?

Hi Dirk： I read the paper <<A nonsmooth nonlinear conjugate gradient method for interactive contact force problems >> But there seems some problem in the paper . As they say r = (H − I)Lamda+h can be interpreted as the gradient of a non-smooth nonlinear quasi-quadratic function f(Lambda) ≡ 1/2|| r||...

Hi Dirk:
have you got the pdf of the paper<<A nonsmooth nonlinear conjugate gradient method for interactive contact force problems >>,If you have, could you send me one?

XperienS: Thanks alot for you reply,that's the data I need, Actually I am more intersting about your new CG LCP sover, so you mean you solve rigid body and sift body all use your new solver? Or you use traditional PGS solver for rigid body and use your new solver for rigid-soft constraint(contact et...

That's great ,Look forward to see your paper,but also I am a little intersted to know the speed efficiency and memory need when solve the system

Impressive!It said all the body share the same solver ,what is the solver based,could you give a short descirption?

Seems good ,Could you write paper describe you new techinique?

the paper<<Tetrahedral Mesh Generation for Deformable Bodies>>
describle the volume mesh generate . but it based on tetrahedron ,may be you can change the method to cube?hope this will help

Hi: I have notice that bullet use tetgen as the volume mesh generator as suggested by Dirk. I have also tested this library but I find it is not appropriate for game physics. Because this Algo is Boundary constrainted this means given a fine surface mesh this libary cannot generate a coarse volume m...

Too large box size(like the ground shape) will make the collision detection algo unstable,try to use triangle mesh shape or bvtriangle mesh shape instead, there is an old thread mentioned for this problem,but I forget the link.