Search found 85 matches

by DannyChapman
Wed Dec 11, 2013 4:46 pm
Forum: Applications, Games, Demos or Movies using Bullet
Topic: Anyone know if the version of bullet in the blender game eng
Replies: 6
Views: 8903

Re: Anyone know if the version of bullet in the blender game

BluePrintRandom wrote:I just asked the DEV team, users don't seem to know at BlenderArtists.org
I thought Blender was open source...
by DannyChapman
Wed Dec 11, 2013 4:19 pm
Forum: Career Opportunities
Topic: Physics/animation engineer position @ NaturalMotion
Replies: 8
Views: 12697

Re: Physics/animation engineer position @ NaturalMotion

Interesting, I have similar results, but not quite as refined, using logic bricks and the BGE. http://www.youtube.com/watch?v=s57ipxhXBS4&list=TL1FWDUqhxP1zQAlgq-e2NwtDNbPOLc-y4 Oh yes - I saw this a little while ago. Controlling characters like you've done is potentially useful, but actually quite...
by DannyChapman
Fri Sep 27, 2013 2:28 pm
Forum: Applications, Games, Demos or Movies using Bullet
Topic: Flight Simulator using Bullet
Replies: 8
Views: 11326

Re: Flight Simulator using Bullet

the problem is how and what forces and magnitude to apply to the flight dynamic model in the case of collision. Surely when you write "problem" you mean "fun"?! You can get SSS here: http://www.rowlhouse.co.uk/sss/sss-2.19.3-skybox.zip - that includes all the source code. I changed quite a few thin...
by DannyChapman
Fri Sep 27, 2013 9:26 am
Forum: Applications, Games, Demos or Movies using Bullet
Topic: Flight Simulator using Bullet
Replies: 8
Views: 11326

Re: Flight Simulator using Bullet

My flight dynamics code just calculates forces and torques that are applied to the rigid body that represents the plane. Bullet handles integrating these forces, and of course applying impulses etc to handle collisions.
by DannyChapman
Wed Sep 04, 2013 3:49 pm
Forum: General Bullet Physics Support and Feedback
Topic: Simulating a small vehicle, scaling, steering
Replies: 1
Views: 2180

Re: Simulating a small vehicle, scaling, steering

I'm not sure how relevant it is, but in my flight sim ( http://rowlhouse.co.uk/PicaSim/ )it's possible to scale the size of the planes (including scaling the mass appropriately), and separately scale the mass. The planes with undercarriages use the bullet raycast vehicle. I found that the only way t...
by DannyChapman
Fri Aug 30, 2013 3:39 pm
Forum: Career Opportunities
Topic: Physics/animation engineer position @ NaturalMotion
Replies: 8
Views: 12697

Physics/animation engineer position @ NaturalMotion

We're looking for a Behaviour Engineer to join the technology team at NaturalMotion (Oxford, UK) - working on procedurally generating human/animal motion in real time using physics simulation and artificial intelligence. There's more information about the technology and its uses in video games on ou...
by DannyChapman
Mon Jun 17, 2013 8:37 am
Forum: Applications, Games, Demos or Movies using Bullet
Topic: Control-line plane model plane simulation using Bullet
Replies: 1
Views: 5344

Re: Control-line plane model plane simulation using Bullet

A more recent video is here: http://youtu.be/aOONp2dAzn4

And if you want to try it for real (Android or Windows at the moment) : http://rowlhouse.co.uk/PicaSim/download.html
by DannyChapman
Fri Jun 14, 2013 11:07 pm
Forum: General Bullet Physics Support and Feedback
Topic: Getting applied force from a rope
Replies: 1
Views: 1672

Re: Getting applied force from a rope

Well, I have a solution - adding a btVector3 to the Anchor to accumulate the impulses (well - I'm more interested in forces as when I read it I don't know what the timestep was): a.m_appliedForce += impulse/dt; and then obviously it needs to get zeroed in a couple of places. If there's a better way,...
by DannyChapman
Fri Jun 14, 2013 10:35 pm
Forum: General Bullet Physics Support and Feedback
Topic: Getting applied force from a rope
Replies: 1
Views: 1672

Getting applied force from a rope

I have a soft body rope - one end is attached to the world, the other to a dynamic object (this is for control-line plane simulation, if that means anything to anybody!). I need to find the tension in the rope (or alternatively/equivalently the force that is being applied to the dynamic object) - ca...
by DannyChapman
Wed Jun 12, 2013 11:39 pm
Forum: Applications, Games, Demos or Movies using Bullet
Topic: Control-line plane model plane simulation using Bullet
Replies: 1
Views: 5344

Control-line plane model plane simulation using Bullet

I've been using Bullet for a while now in my R/C plane simulator ( http://www.rowlhouse.co.uk/PicaSim )- just for the rigid body simulation. Just recently I've been adding control-line models (which I used to fly many years ago) - a pretty insane activity where you fly planes round in circles at 80 ...
by DannyChapman
Mon Apr 08, 2013 9:35 am
Forum: General Bullet Physics Support and Feedback
Topic: Documentation?
Replies: 6
Views: 2330

Re: Documentation?

But with opensource projects, to idly criticize something and not just do it is only a fault of oneself, not the programmers. No - I disagree with this! People make projects free and/or opensource for a number of reasons - e.g. they're enthusiastic about what they do as a hobby, or they've learnt l...
by DannyChapman
Fri Feb 15, 2013 9:14 am
Forum: General Bullet Physics Support and Feedback
Topic: Some "can i do that" questions from newbie
Replies: 4
Views: 2305

Re: Some "can i do that" questions from newbie

sikor wrote:Thank you for your post.
here's a short example if someone is curious http://www.youtube.com/watch?v=14fn9Rd1V3E
That video is private... it would be nice to see it!
by DannyChapman
Fri Jan 18, 2013 10:41 pm
Forum: General Bullet Physics Support and Feedback
Topic: Speed issues with btHeightfieldTerrainShape
Replies: 23
Views: 12097

Re: Speed issues with btHeightfieldTerrainShape

I've also been seeing big slowdowns when my object is moving close to the heightfield. Actually - I typically just have one object and one heightfield ( http://www.rowlhouse.co.uk/PicaSim/ ) - the reason it's hurting me is my plane is a compound with about 11 shapes, and I have to simulate at a very...
by DannyChapman
Wed Jan 02, 2013 5:42 pm
Forum: General Bullet Physics Support and Feedback
Topic: Some "can i do that" questions from newbie
Replies: 4
Views: 2305

Re: Some "can i do that" questions from newbie

Yes (with joint motors) and yes. One problem you'll have though, if you're intending this to be for realtime use (i.e. stepping physics at < 60Hz and just a handful of iterations), is that the iterative solver will not converge very quickly, which will mean you won't get anything like the control yo...