Re[2]: [ODE] Re: Bendy wheel problem

[Nate W]

Is it just me, or are there two distinct 'bendy wheel' problems?

One problem is a random-looking wobble that happens when the wheel's
rotation speed gets too high; the other problem is that the wheel bends
from its proper angle during cornering.  The former seems to be caused by
a constraint that is too stiff (it looks a bit like an oscillation), the
latter seems to be caused by a constraint that is too soft (it's just a
smooth divergence from the desired orientation).

The latter is visible in Si's buggy-and-shadowing demo, and I wonder if it
might be related to the suspension parameters of the hinge-2 joints.  
They are supposed to soften up linear motion along the suspension axis,
but do they (as an unintentional side-effect) also soften up the alignment
constraints, allowing the wheel bend away from the desired orientation?

Has anyone tried making the suspension really stiff, and if so does that
help the second bending problem mentioned above?

-- 

Nate Waddoups
Redmond WA USA
http://www.natew.com