[ODE] executive toy

[Michael Lacher]

James Arthur wrote:

> On Tue, 27 Jul 2004 18:00:33 +0200, Michael Lacher
> <michael.lacher at hlw.co.at> wrote:
> 
>>James Arthur wrote:
>>
>>>Are the balls touching when they begin or are they slightly separated?
>>>
>>
>>they are exactrly touching (ie: radius 0.5, spaced one unit apart).
> 
> 
> Try giving them either a tiny separation or making them a little squashy.
> 
A little seperation helps to make ODE *not* explode, at the time of 
impact:) but not for my problem, I figured out that my engine didn't 
behave correctly when two objects with physics controllers on them 
collided (so far i only had collisions of buggys with static terrain :) ).
The contacts got inserted by both controllers, which is not a big 
problem in itself (except prformance wise), but they were inserted with 
swapped normals. this resulted in the sticky behaviour.

Now the balls behave realistically, although it is hard to get the 
simulation to look "correct": Even with slightly soft contacts the 
middle balls quickly start moving with the rest, and the energy 
disperses ... but I am sure I can get this to work with a little more 
fiddling with the params.

Thanks for the help to all of you
mucki