How to change the status of a object which has a joint.

[forestluo]

I defined a object with mass = 1.0 unit. I created a ballsoket joint and defined a max cone angle. I set joint's child as this object and left its parent as NULL.
I found that : the object would not be updated, If I attached it with the joint. The update callback took no effect.

So what should I do ?

I supposed the position of object would be updated whenever I attached the joint or not.
Or I should get the relative Eular angle from joint and change the position of object ?

Forest Luo

[Julio Jerez]

static objects do no get updates. nake sure your obuect is not static.

[forestluo]

static objects do no get updates. nake sure your obuect is not static.

It is not a static object. I put a box over it and let it drop down to drive joint rotate.

By the way : How to post a picture or movie with the topic ?

[Julio Jerez]

youtube

[JoeJ]

Maybe the body simply fell in sleep mode?
You can check by calling NewtonBodySetAutoSleep (objectBody, 0) at creation.

[forestluo]

Sorry, it is my fault.

I checked my program over and over, and found out that was my own problem.
It is my fault to remove the jointed object from the updating list when creating a joint . So it is still there.

Thanks a lot !

Forest Luo