The mass ratios problem

[Wavesonics]

As I understand it, the problem is with floating point operation inaccuracies right?

So would running bullet on a 64bit platform ease the problem a bit allowing for greater mass ratios?

[Erwin Coumans]

No, it is not due to FPU accuracy. Iterative constraint solvers, including the one based on PGS in Bullet, don't converge fast enough towards a solution.

Improving support for larger mass ratios can be achieved with a different constraint solver, a smaller internal time step and more constraint iterations.
Thanks,
Erwin

[Wavesonics]

Would continuous collision detection help this?

Also, I read on Newton's site that they dont use Iterative solvers, and that (or something else in there?) makes Newton deterministic, any idea what they use?

[sparkprime]

I gave the ODE solver a try but it didn't work at all - I'm using DiscreteCollisionWorld, and none of my object had any friction with the ODE solver!