Search found 42 matches

by Xcoder79
Fri Jul 21, 2017 3:24 am
Forum: General Bullet Physics Support and Feedback
Topic: Memory Problem on Soft Bodies
Replies: 1
Views: 2522

Re: Memory Problem on Soft Bodies

Hi,

Have you tried changing, softBody->m_cfg.viterations = 50;
softBody->m_cfg.piterations = 50;
To a lower value why so high?
Also cfg.kPR Softbody Pressure is not very stable.
by Xcoder79
Tue Mar 21, 2017 1:02 am
Forum: General Bullet Physics Support and Feedback
Topic: Bullet Physics Soft Constraint
Replies: 2
Views: 1538

Re: Bullet Physics Soft Constraint

Hi


Bullet physics, has many constraints for rigidbodies and softbodies, I would have a look at the demo that came with the SDK, could you be more specific on what kind of constraint you are after.
by Xcoder79
Fri Mar 17, 2017 11:56 pm
Forum: General Bullet Physics Support and Feedback
Topic: SoftBody generates Uninitialised error on valgrind
Replies: 4
Views: 2038

Re: SoftBody generates Uninitialised error on valgrind

Hi

I would have a look at bullet softbody demo that came with the sdk, the sofbodies in the demo a configured diffrent from yours.
by Xcoder79
Sat Oct 22, 2016 10:11 pm
Forum: General Bullet Physics Support and Feedback
Topic: softbody-softbody collision issue
Replies: 2
Views: 4541

Re: softbody-softbody collision issue

Hi,


This is very strange, how did setup the softbodies its difficult to tell what is going on just by the video without looking at the code.

Thx
by Xcoder79
Mon Oct 03, 2016 5:05 pm
Forum: General Bullet Physics Support and Feedback
Topic: Two Outstanding Issues
Replies: 7
Views: 2837

Re: Two Outstanding Issues

Hi,


Have you tried setting the gravity value to something lower then 450.5f inside global.

Thx, hope this helps
by Xcoder79
Sat Sep 24, 2016 4:32 am
Forum: General Bullet Physics Support and Feedback
Topic: Soft-Body Objects fall apart
Replies: 3
Views: 2431

Re: Soft-Body Objects fall apart

Hi,


I have noticed that inside your code, generateClusters is set to 64 this will create 64 individual softbody convex clusters for your object.
It seems like your object is breaking to its 64 individual collision triangular clusters.

Hope this helps

Cheers☺
by Xcoder79
Thu Sep 22, 2016 8:36 pm
Forum: General Bullet Physics Support and Feedback
Topic: Softbody with metallic material properties
Replies: 3
Views: 2201

Re: Softbody with metallic material properties

Hi,


Yes, just a regular softbody works fine, with gravity tuned down a little you can have a look at my previous post from awhile ago about Softbody plasticity it shows how to set up the softbody.

Hope this helps ☺
by Xcoder79
Wed Sep 21, 2016 10:32 pm
Forum: General Bullet Physics Support and Feedback
Topic: Softbody with metallic material properties
Replies: 3
Views: 2201

Re: Softbody with metallic material properties

Hi, The clusters in your code are set to generateClusers(64) this creats 64 individual collison clusters, setting the clusters to a lower value like 2 will create a very stiff body. Now if you want to achieve metal malubilty, thats when your object needs to have plasticity. Using a Tetrahedral softb...
by Xcoder79
Thu Sep 15, 2016 4:56 am
Forum: Applications, Games, Demos or Movies using Bullet
Topic: Tetrahedral Softbody Fracture, Cutting
Replies: 0
Views: 3866

Tetrahedral Softbody Fracture, Cutting

Hi, Below are a few snapshots, Showing fracture, cutting of the Tetrahedral Softbody using Softbody collision clusters. All collison clusters are set to 0 using generateClusters with k=0 will create a convex cluster for each tetrahedron or triangle otherwise an approximation will be used. This Demo ...
by Xcoder79
Mon Aug 22, 2016 3:52 am
Forum: General Bullet Physics Support and Feedback
Topic: SoftBody Plasticity
Replies: 2
Views: 2010

Re: SoftBody Plasticity

Hi, Sorry for taking so long to respond. Here is a demo showing plasticity in simplest form. https://www.youtube.com/watch?v=uMODXFtOWhM And the modifications applied to SoftDemo.cpp file. //changing the shape of rigidbody // Big plate // static btRigidBody* Ctor_BigPlate(SoftDemo* pdemo,btScalar ma...
by Xcoder79
Sun Aug 14, 2016 7:26 pm
Forum: General Bullet Physics Support and Feedback
Topic: how to simulate ABS material for 3D printing
Replies: 2
Views: 1227

Re: how to simulate ABS material for 3D printing

Hi,

Try using softbody collison clusters, genarateClusters(0) will create as many clusters as possible for the softbody, using other values will change the softness of the body.

Hope this helps.

Thx
by Xcoder79
Mon Aug 01, 2016 3:44 am
Forum: General Bullet Physics Support and Feedback
Topic: Discussion of future Bullet Example contributions (Join us!)
Replies: 44
Views: 25795

Re: Discussion of future contributions and roadmap

Hi,

Benelot I am very Intrested, in contributing. Have you finshed the Newtons Cradel using Softbody ropes.
by Xcoder79
Tue Jul 19, 2016 5:19 pm
Forum: General Bullet Physics Support and Feedback
Topic: joints connecting soft body nodes
Replies: 1
Views: 1448

Re: joints connecting soft body nodes

Hi,

To, simulate a spiral spring, I would use a series of soft body toruses all constrained on the Y axis, as this would be the simplest approach.

Hope this helps.

Thx
by Xcoder79
Mon Jul 18, 2016 11:03 pm
Forum: General Bullet Physics Support and Feedback
Topic: Soft Body Plasticity
Replies: 6
Views: 3011

Re: Soft Body Plasticity[SOLVED]

Hi, Below is a short video showing plasticity. https://www.youtube.com/watch?v=LdFudRri5WY And the following Modifications to setup the SoftBody. btSoftBody* psb=btSoftBodyHelpers::CreateEllipsoid(pdemo->m_softBodyWorldInfo,btVector3(0,-6,0), btVector3(1,1,1)*3, 512); //psb->m_materials[0]->m_kLST =...