Search found 18 matches

by billias13
Mon Oct 13, 2014 1:52 pm
Forum: Applications, Games, Demos or Movies using Bullet
Topic: BulletPhysics in Augmented Reality Laparoscopic Simulator
Replies: 2
Views: 9742

Re: BulletPhysics in Augmented Reality Laparoscopic Simulato

Sorry about that, i didn't notice the broken links..fixed them!
I would also be interested in learning more things on your project, since this is my area of research!
by billias13
Mon Oct 13, 2014 11:16 am
Forum: Applications, Games, Demos or Movies using Bullet
Topic: BulletPhysics in Augmented Reality Laparoscopic Simulator
Replies: 2
Views: 9742

BulletPhysics in Augmented Reality Laparoscopic Simulator

Title : A novel augmented reality simulator for skills assessment in minimal invasive surgery Article : http://link.springer.com/article/10.1007%2Fs00464-014-3930-y Video : https://www.youtube.com/watch?v=tECvdnHZoEI This article is a proof of concept for the potential use of Augmented Reality in la...
by billias13
Thu Apr 24, 2014 10:29 am
Forum: General Bullet Physics Support and Feedback
Topic: Isolating vertex of rigid body cube
Replies: 2
Views: 4582

Re: Isolating vertex of rigid body cube

Just get the transformation matrix of the cube ( getWorldTransform() ) and multiply it with the vector that describes the local coordinates of each vertex. For example :

btVector3 VertexPosition = Cube.getWorldTransform()*btVector3( CubeSize/2, CubeSize/2, CubeSize/2);
by billias13
Mon Jan 20, 2014 3:21 pm
Forum: General Bullet Physics Support and Feedback
Topic: Mass doesn't affect Sphere fall speed
Replies: 9
Views: 10029

Re: Mass doesn't affect Sphere fall speed

Sorry, i forgot about damping! You can use this to implement any kind of resistance (linear or angular)
Check btRigidBody::setDamping
by billias13
Mon Jan 20, 2014 3:17 pm
Forum: General Bullet Physics Support and Feedback
Topic: Mass doesn't affect Sphere fall speed
Replies: 9
Views: 10029

Re: Mass doesn't affect Sphere fall speed

I am not quite sure whether or not you can implement air resistance in rigid bodies, but i think that for trivial shapes such as spheres and boxes etc it would be pretty much negligible. However, there is the option of setting slightly different gravity vectors for each falling object to achieve dif...
by billias13
Mon Jan 20, 2014 2:53 pm
Forum: General Bullet Physics Support and Feedback
Topic: Mass doesn't affect Sphere fall speed
Replies: 9
Views: 10029

Re: Mass doesn't affect Sphere fall speed

I mean that since there are no other factors such us air resistance (size of object) etc, the rate on which any object falls towards the ground (acceleration of gravity and hence speed) is independent of its mass.
by billias13
Fri Jan 03, 2014 11:35 am
Forum: General Bullet Physics Support and Feedback
Topic: My complaints on bullet's source code quality
Replies: 11
Views: 13204

Re: My complaints on bullet's source code quality

Bullet is a huge library to be supported by just one person. Erwin has done an amazing job in open-sourcing, maintaining and improving this library, and since a large number of people worldwide are using it, this community should become more involved and actually contribute rather than requesting. T...
by billias13
Tue Dec 17, 2013 11:15 pm
Forum: General Bullet Physics Support and Feedback
Topic: surface tutorial
Replies: 2
Views: 3557

Re: surface tutorial

Check the restitution of your rigid bodies using the .setRestitution() method.
Setting restitution to 0.0 will result in no bounce at all.
by billias13
Sun Nov 10, 2013 11:52 pm
Forum: General Bullet Physics Support and Feedback
Topic: Bulletphysics body goes through floor
Replies: 1
Views: 2712

Re: Bulletphysics body goes through floor

Maybe some code showing how you add your objects to the scene would help, but first, try using a box shape with small height instead of a plane for the ground.
by billias13
Wed Nov 06, 2013 3:29 pm
Forum: General Bullet Physics Support and Feedback
Topic: disable a p2p constraint
Replies: 1
Views: 3101

Re: disable a p2p constraint

Since you want to move the whole rope by dragging one of its spheres, disabling the constraint will not produce the desired effect. Normally, if the rigid bodies that belong to the rope are defined correctly, your rope should move when you dragged any of its spheres. I believe that there is somethin...
by billias13
Sun Jan 27, 2013 12:06 pm
Forum: General Bullet Physics Support and Feedback
Topic: Implementing a plier
Replies: 0
Views: 2562

Implementing a plier

Hello, i am developing an application for which i require to implement a plier that should grab and lift objects (small boxes, spheres or capsules). The plier consists of two parts (two sides) that rotate around an axis. So while the user clicks on a certain key, the plier is closing at a constant r...
by billias13
Sun Jan 27, 2013 12:05 pm
Forum: General Bullet Physics Support and Feedback
Topic: Implementing a plier
Replies: 0
Views: 2567

Implementing a plier

Hello, i am developing an application for which i require to implement a plier that should grab and lift objects (small boxes, spheres or capsules). The plier consists of two parts (two sides) that rotate around an axis. So while the user clicks on a certain key, the plier is closing at a constant r...
by billias13
Thu Nov 01, 2012 4:03 pm
Forum: General Bullet Physics Support and Feedback
Topic: Deformable Bodies
Replies: 5
Views: 8714

Re: Deformable Bodies

did you ever find a solution to this problem?