Hi,

is it possible to give a rigid body object an initial angular force - similar to the option “selection adds a force” ? I would like to build a kind of catapult or trebuchet.

Ha, I am happy you asked :D First you need to enabled this feature in Physics config file (SYSTEM section):

Now, after you restart/run MB you will see no special change, except that all models that have rigid body attached (or ragdoll approximations) will have five new properties added:
- Collide (should be used as read only)
- Velocity Linear (should be used as read only)
- Velocity Angular (should be used as read only)
- Force Accumulator (here you write force that will be added at each solver step; added at center)
- Torque Accumulator (here you write torque that will be added at each solver step; added at center)

BTW. I have called this “Rigid Bodies advanced” in my pool.

BTW2. You may also try to animate/control joint limits. Should work too for your case.

Cheers

Hi KxL !

You are my hero ! Frankly speaking - without you MB2010 would only be half effective for me :-)
I changed the option you described and now it worked like a charm.

... and of course you are right: animating the joint limits would also solve me problem.

cheers and thanks a lot for your veeeeery precious tips !

PS: I voted for your “Rigid Bodies advanced” tutorial :-)