Multithreaded physics (bullet)

[Alexander_krack]

I have attempted to use the rigid body combiner and it provides no benefit with performance. In fact, It causes most of the cubes to disappear. A weird issue.

what it looks like using the rigid body combiner:

what it looks like when parented normally to the scene:

I have tried doing this in the past and there is a forum page out there with some info where I asked the use of the combiner on bullet objects. The answers from that forum specifically said that the rigid body combiner is not designed for physics nodepaths. A lot of weird bugs happened when I used it, this is one of them that I still haven’t quite solved to this day.

https://discourse.panda3d.org/t/how-to-use-dynamic-rigid-bodies-that-are-parented-to-a-rigidbodycombiner/29852/6

You actually said yourself that:

How to use dynamic rigid bodies that are parented to a RigidBodyCombiner

To the best of my knowledge, the RigidBodyCombiner isn’t intended for use with physics; rather it’s intended to reduce the number of visual meshes being sent to the graphics card to be rendered. (See this manual page for more detail.) As such, applying it to physics objects may well indeed break those physics objects. (While the name is similar to that of the “BulletRigidBodyNode”, I imagine that this simply reflects that both work on non-animated–i.e. rigid–meshes.) As to your physics object…