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Question by unity_DKqnJkGo8MOKYQ · Jan 16, 2019 at 08:41 PM · physics parent transform

Why does a Parent Transform wobble if a child rotates?

I have a parent node (bicycle frame) that has child nodes for the wheels, and the fork.

As I spin the rear wheel (connected to parent via HingeJoint) then the parent's Transform starts to wobble (positional part of the transform.)

This video shows what happens: https://www.youtube.com/watch?v=0Rqp5jIINXM

Note that even though the transform wobbles, the actual model of the frame is not moving.

What is going on here?

Is it even possible to have joints that connect Parent node's rigidbody to a child node's rigidbody?

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