Julio Jerez wrote:I assume only the core body is support to have the force and torque.
if so, I set teh force and torque call back to the Palylod body to NULL,
that was I can add some debug trace to the force and trque callback. since it will be call onle for one body.
No!
Every body has forces acting on it. For example, when going through the atmosphere, all parts of the rocket experience drag and restoring torque (if the velocity isn't the same as the longitudinal axis of the body). Also, in my simulator, the core rocket body also has solid rocket boosters attached to it, using the same hard hinges, and they provide A LOT of thrust. Check out the video of my simulator here:
SLS LaunchYou will see 3 bodies (rocket core and solid rocket boosters) attached together, each having thrust. They separate at 2:32...
Julio Jerez wrote:what is so strragne is that the error seem to build up and never get reduced, I have as high as 1.5
and and never go back to a small value, it is as teh joint has a memory.
This may give you a clue: Take a look at my post in this thread from Mon Sep 10, 2018 9:33 pm. Basically, when
NewtonBodySetLinearDamping and
NewtonBodySetAngularDamping are
non-zero, the error DOES diminish, very close, but not quite, to zero.
thanks!
Misho