[ODE] Wheels bending ;-)
kaffiene
kaffiene at xtra.co.nz
Fri May 31 01:45:02 2002
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Hi All,
I've come across a problem which seems to be mentioned in the docs =
(section 11.9) - the problem of wheels on a car moving out of alignment =
under fast rotations.
I've applied the recommended fix (dBodySetFiniteRotationMode(<each wheel =
body.>, 1) when bodies are created, and dBodySetFiniteRotationAxis(<each =
wheel body>, 0, 1, 0) before or after each time step of the simulation) =
but it doesn't seem to work. When I use the setFiniteRotationAxis with =
axis y as above, I cannot steer my car at all!=20
Anyone come accross this before? Any ideas?
p.s. I have tried using dBodySetFiniteRotationAxis(<each wheel body>, 0, =
0, 0) and dBodySetFiniteRotationAxis(<each wheel body>, 0, 0, 1) (it's a =
hinge2 joint with z and y axis, but I'm pretty sure that the z axis is =
*not* the one the wheel rotates about). Neither of those approaches =
fixes the original problem, but I can at least steer =3D)
Help! =3D)
Thanks in advance for any ideas.
Peter.
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<DIV><FONT face=3DArial size=3D2>Hi All,</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>I've come across a problem which seems =
to be=20
mentioned in the docs (section 11.9) - the problem of wheels on a car =
moving out=20
of alignment under fast rotations.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>I've applied the recommended fix=20
(dBodySetFiniteRotationMode(<each wheel body.>, 1) when bodies are =
created, and dBodySetFiniteRotationAxis(<each wheel body>, 0, 1, =
0) before=20
or after each time step of the simulation) but it doesn't seem to =
work. =20
When I use the setFiniteRotationAxis with axis y as above, I cannot =
steer my car=20
at all! </FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Anyone come accross this before? =
Any=20
ideas?</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>p.s. I have tried using=20
dBodySetFiniteRotationAxis(<each wheel body>, 0, 0, 0) and=20
dBodySetFiniteRotationAxis(<each wheel body>, 0, 0, 1) (it's a =
hinge2=20
joint with z and y axis, but I'm pretty sure that the z axis is *not* =
the one=20
the wheel rotates about). Neither of those approaches fixes the =
original=20
problem, but I can at least steer =3D)</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Help! =3D)</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Thanks in advance for any =
ideas.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Peter.</FONT></DIV></BODY></HTML>
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