3D rigidbody movement around a sphere in Godot4

[Sweatix]

@Dalton

[…] I have no idea how to maintain the rotation of the player so it can walk around the entirety of the sphere smoothly

I have a reference to the “down vector” supposedly where the players feet should be, but anything I’ve tried with basis and quaternions to rotate the player hasn’t worked out. if anyone can point me in a good direction for this itd be great

In the code that you’ve provided, I don’t see any torque being added to the physics body. I assume that you’ve deleted your previous attempts at rotating the body in the manner that you’re describing.

There is a variety of ways that you can manipulate a RigidBody3D. One is obviously forces, but you can also manipulate its state directly via _integrate_forces() and the supplied state-parameter.

Questions

• Have you tried setting the state.transform to a transform with your desired rotation?
• What have you tried before (that ended up not working)?
• What is your end-goal with this character controller (see sidenote)?
• How does using a RigidBody3D, over a CharacterBody3D, make gravity easier to implement?

Please answer these questions. It would help us get a better idea of what your exact problem is.

SIDENOTE
I do, somewhat, agree with @dragonforge-dev. The CharacterBody3D class is specifically designed for the typical use case of a moving character. For your specific use case, you can use CharacterBody3D.up_direction to ensure that it interprets the world in a manner that is correct for your project (e.g. setting up_direction to -down_vector).

That said, it is entirely possible to achieve a similar result with a RigidBody3D if you know what you’re doing. Just know that it requires more work. Unless you have a unique system in mind, you are, in fact…

@dragonforge-dev

[…] making it harder.