Please do not obselete the analytical joint in the future.

[forestluo]

I found the classic analytical joint is very useful.
Because its definition is very easy to understand and it has a very useful parameter --- Joint Force.
This parameter could be used to simulate some physics analyse, although it is not very accurate.

It is very useful in physics education. I can use joint to analyse the the internal force, the joint can be a force meter.
Or you can tell me how to get the internal force parameter by other way ?

I regret that there is no force function of CustomJoint.

Forest Luo

[Julio Jerez]

you can get the internal force function for any joint.
look at the joint iterator.
you cna get the magnto and the diretion vecotr of teh forace teh joint apply to the body, thet is the inrtenal force.

also by cros produing with the distance form eth point to teh joint you can ge teh torue teh joint apply to the body.
Netwon do in fact give you all of the physicas information.