Real-Time Physics Simulation Forum

Sounds like exactly what I want. I will take a look.

I'm trying to implement some of the techniques layed out in this paper on Interactive Dynamics: http://www.cs.ubc.ca/~van/papers/skistunt.pdf I have a working 2D physics engine based off Erin Cattos Box2D code. (The updated version with the split impulses). I'm having trouble implementing angular da...

I fixed the problem. It was a bug introduced when swithing my code from Erin's orginal code to the new split impulse method. All fixed now and working great. btw, for anyone interested here is a game created by someone that is using my free 2d engine. (This game doesn't have the fix yet.) http://xbo...

I have a 2D physics engine based on Erin Catto's 'Fast and Simple Physics using Sequential Impulses Paper' I'm experiencing what seems to be too much "bounce" from my rigid bodies. Is this to be expected using using this technique? Or, do I have a bug to track down. An example: I have a cu...

A fully managed C#/XNA version of Bullet would be great!

No, I have not implemented joints (from either papers) yet. I'm mostly interested in using my engine for games, so if Erin's collision response technique is more performant, then I'll probably just stick with it.

I will most likely use the Joint system from Box2D as well.

I've implemented a 2D rigid body system that supports convex polygon collision detection. Its collision detection uses a Distance Grid similar to that discussed in the 'Nonconvex Rigid Bodies with Stacking' paper by Guendelman For the collision response, I've implemented Erin Cattos Impulse based sy...

Ok, that's kinda the idea i had for contactID's Seems pretty straight forward.

Thanks for the info on the weighting. I saw that code but didn't realize that was what you meant by weighting. Makes sense now.

Hi Erin, thanks for the response. I've started digging into this and still have some small questions. For box/box I can see how the contactId can be made up of the two edge numbers that produce the verts, but with poly-poly, the clipping will most likely not be done by an edge of the poly but rather...

In Erin Catto's paper: 'Fast and Simple Physics using Sequential Impulses', he uses boxes. I am interested in extending this to 2d convex polygons with more than 4 sides for a simple 2d physics engine I'm developing. I've read through the code and understand it all for the most part. However, I'm lo...

I'm looking for thoughts people have on implementing the 'Nonconvex Rigid Bodies with Stacking' paper in 2D. I'm considering using the 2D equivalent of both the collision detection and collision response. The collision response seems like it would transfer well to 2D. I"m less sure of how the p...