Re[2]: [ODE] Cylinder colisions

[slipch]

Hello Mattias,

Thursday, October 10, 2002, 11:25:42 AM, you wrote:

>>  Hear is cylinder class for ODE.

MF> Hey! Nice job, I tried it out and it seems to work the way it should. 
MF> I've seen cylinders explode out into space, but only rarely. 

They must not "explode out".  One reason it may happen is well known
problem with integration of fast rotating body. Cylinders (as well as
Capped Cylinders) must show this problem more often than other bodies
especially when radius/length ratio is small. It happen because
rotating around an axis with small inertia partly counts as rotating
around an axis with large inertia. But it is not a problem of
colliders.
To resolve it finite rotation axes may be used or simply
do not set inertia tensor with strongly different inertia of its axes.
It is also should depend on integration step.

-- 
Best regards,
 slipch                            mailto:slipch@gsc-game.kiev.ua