Real-Time Physics Simulation Forum

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

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 i...

I cant run your demo. It ways cannot find libiomp5md.lib

More control over the rod would be nice (dragging by mouse etc.)

I can certainly help with this if you need it.

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.

Dear all, I am at it again. I am still finding difficulties in implementing strain based dynamics paper. I am using it to simulate a piece of cloth hence I need to worry about the triangle constraint. The bending modes work perfectly fine for my cloth but the triangle constraint fails. At the moment...

Hi Giovanni, The book physics based animation gives a lot of detail about implementation of Corotated Linear FEM but as you have also noticed, all open source packages like OpenTissue use templates heavily. Probably the best paper to understand Corotated linear FEM is Interactive Virtual Materials ....

Nevermind, I think I know the answer. The del S that we calculate is a 3x2 matrix because it contains two column vectors of dp, one for point p1 and second for point p2. For p0, we just calculate it using the dp of p1 and p2. So in the end these are the corrections calculate S using Eq. 28 or Eq. 11...

hi all. I am trying to implement strain based dynamics and i have a slight problem with the implementation. I assume I am doing something wrong. This is for a triangular mesh so i am not considering the tetrahedral constraint. There are two formulas given for calculating Strain for tri mesh. One in ...

OK guys as usual. After posting question on the forum I get an answer. The following code works for me and I get the correct results now. bool ConcaveCollision() { //clear depth and stencil buffers glClearDepth(1.0f); glClear(GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT); //disable color writes glCol...

Hi all, I am reading chapter 10 of book (realtime collision detection by Christer Ericson). The GPU collision chapter first gives Convex collision detection code snippet. I implemented it in OpenGL as given in Table 10.1 and it works as advertised. I then followed suit with the concave collision det...

OK thanks for the clarifications Francesco. Its actually a different story altogether when u introduce collision and in particular self-collision into the performance stats. And I suspect when u add that in, particle based approach will certainly show better performance but still its an interesting ...

A couple of questions to ask you? 1) What were the resolutions of these meshes and what were the timing results for these videos. 2) How different is your model from the standard continuum model where the mesh is represented in the form of tetrahedra/hexahedra and then FEM is solved on these element...

Thanks Erwin for your feedback. I thought HACD (and the different variants by Julio and John Ratcliffe) are already doing a pretty good job with convex decomposition. What is left now with convex decomposition it seems pretty good to me. Usually concave decomposition solutions split each concave obj...

Thanks for the inputs highly appreciated. OK in the area of CCD, the most recent promising approach that I have seen is this http://www.cs.ubc.ca/labs/imager/tr/2012/ExactContinuousCollisionDetection/BEB2012.html The papers only show basic geometries like a bunch of cloth piece etc. but has anyone u...

Hi all, I would like to seek expert opinion on some of the open research topics (which are still unaddressed by the research community in general) especially from the point of view of real-time physics simulation. One of the topic that I know is soft body simulation with collision and self-collision...