Check the first paper here... not sure you could make it work for games but you may still find it interesging.
http://www.cs.ubc.ca/~van/papers/index.html
Search found 41 matches
- Wed Dec 19, 2007 11:57 pm
- Forum: Research and development discussion about Collision Detection and Physics Simulation
- Topic: Character Simulation
- Replies: 6
- Views: 7578
- Wed Oct 03, 2007 10:37 am
- Forum: Links, Papers, Libraries, Demos, Movies, Comparisons
- Topic: Farseer Physics Engine For XNA and Silverlight 1.1
- Replies: 0
- Views: 6117
Farseer Physics Engine For XNA and Silverlight 1.1
I just released a new version of my 2D physics engine. This engine is a c# engine derived from Erin Catto's Box2D Lite engine. Description The Farseer Physics Engine is an easy to use 2D physics engine designed for Microsoft’s XNA and Silverlight platforms. The Farseer Physics Engine focuses on simp...
- Thu Sep 13, 2007 11:30 am
- Forum: Links, Papers, Libraries, Demos, Movies, Comparisons
- Topic: Box2D Open Source Project
- Replies: 4
- Views: 8678
Re: Box2D Open Source Project
There has already been some talk(started by me. of porting this engine to a c#/managed code so that it can be used with XNA: http://forums.xna.com/thread/24356.aspx
- Tue Sep 11, 2007 11:44 am
- Forum: Links, Papers, Libraries, Demos, Movies, Comparisons
- Topic: Box2D Open Source Project
- Replies: 4
- Views: 8678
Re: Box2D Open Source Project
This is very impressive. Big step up from your original engine. I have a feeling this engine will be quite popular amoung the indie game developers!
- Tue Aug 21, 2007 4:40 pm
- Forum: Research and development discussion about Collision Detection and Physics Simulation
- Topic: Box2D plus elastic collisions
- Replies: 4
- Views: 7849
There is a good example of it in this open source engine:
http://wiki.slembcke.net/main/published/Chipmunk
http://wiki.slembcke.net/main/published/Chipmunk
- Mon Aug 20, 2007 4:47 pm
- Forum: Links, Papers, Libraries, Demos, Movies, Comparisons
- Topic: MetaPhysics (2D PBD-based rigid bodies)
- Replies: 8
- Views: 12997
- Mon Aug 20, 2007 11:29 am
- Forum: Links, Papers, Libraries, Demos, Movies, Comparisons
- Topic: MetaPhysics (2D PBD-based rigid bodies)
- Replies: 8
- Views: 12997
Very nice. I've been reading thru these papers. Interesting stuff. One piece I'm not clear on for rigid bodies is how moment of intertia is handled when everything is basically just a bunch of connected points that get re-positioned every frame. I'm not done with the papers yet so maybe it's in ther...
- Thu Aug 16, 2007 6:33 pm
- Forum: Research and development discussion about Collision Detection and Physics Simulation
- Topic: Baumgarte and Softness for 2D Joints
- Replies: 6
- Views: 22215
- Thu Aug 16, 2007 1:54 pm
- Forum: Research and development discussion about Collision Detection and Physics Simulation
- Topic: Baumgarte and Softness for 2D Joints
- Replies: 6
- Views: 22215
Thanks Dirk. I'm not really concerned with the values of ERP and CFM (BiasFactor and Softness) I'm just interested in implementing softness into my angle joint class. (I'll worry about good values later) What you show helps me alot. My only question now I guess is the specifics of how to apply this ...
- Thu Aug 16, 2007 11:12 am
- Forum: Research and development discussion about Collision Detection and Physics Simulation
- Topic: Baumgarte and Softness for 2D Joints
- Replies: 6
- Views: 22215
I'm still trying to get my head around the implementation of softeness. In particular, I have a 2D Angle Joint with upper and lower limits. I used Erin's description here http://www.continuousphysics.com/Bullet/phpBB2/viewtopic.php?t=517 to create the joint. The joint works fine and I mostly underst...
- Fri Aug 10, 2007 6:25 pm
- Forum: Research and development discussion about Collision Detection and Physics Simulation
- Topic: Baumgarte and Softness for 2D Joints
- Replies: 6
- Views: 22215
Baumgarte and Softness for 2D Joints
On Erin's blog, in a comment is the following statement: "Relaxation is an indirect way to soften the joints. In the GDC07 version of the bridge I directly use softness and the Baumgarte parameter to achieve a specified joint stiffness and damping. Unlike a true spring and damper, the SI algori...
- Fri Aug 10, 2007 5:32 pm
- Forum: Research and development discussion about Collision Detection and Physics Simulation
- Topic: 2D Joint Motor For Angle Joint
- Replies: 2
- Views: 5237
- Tue Aug 07, 2007 7:35 pm
- Forum: Research and development discussion about Collision Detection and Physics Simulation
- Topic: 2D Joint Motor For Angle Joint
- Replies: 2
- Views: 5237
2D Joint Motor For Angle Joint
In my 2D physics engine I have a 'FixedAngleJoint'. This joint constrains two bodies to remain at some fixed angle. This joint is implemented using a Baumgarte factor and the ideas in Box2D. I want to dynamically modify the target angle in order to allow the user to control objects in my app. So far...
- Tue Aug 07, 2007 5:50 pm
- Forum: Research and development discussion about Collision Detection and Physics Simulation
- Topic: 2D Angle Joint Limits (Box2D-Style)
- Replies: 4
- Views: 6854
I thought this had been discussed before:
http://www.continuousphysics.com/Bullet ... .php?t=517
Looks like I'm missing the clamping!
http://www.continuousphysics.com/Bullet ... .php?t=517
Looks like I'm missing the clamping!
- Tue Aug 07, 2007 11:34 am
- Forum: Research and development discussion about Collision Detection and Physics Simulation
- Topic: 2D Angle Joint Limits (Box2D-Style)
- Replies: 4
- Views: 6854
Thanks Dirk, that helped. I have my angle limits working (sort of). They work fine for certain configurations, but are very unstable in others. Things seem to become more unstable the further the anchor is from the involved bodies. I'm wondering if this is just the nature of the beast or if I have s...