How to use Hinge Joints correctly inside a parent?

Questions & Answers
1

I’m trying to create a cube with two ‘legs’ using hinge joints so they move like spaghetti using the physics engine :smiley:

The issue I’m having is that when I have created a ‘leg’ and I want to join it on to my cube that works oky but when the cube and the ‘leg’ are inside a parent and I move the parent the movement doesn’t affect the physics anymore.

Img of hinges

My parent hierarchy is like this:

Character

  1. Head (Another mesh)
  2. Body (Another mesh)
  3. Cube
    4. Leg1
    4. Anchor
    4. Joint1
    4. Joint2
    4. Joint3
    4. Joint4
    4. Leg2
    4. Anchor
    4. Joint1
    4. Joint2
    4. Joint3
    4. Joint4

Now I want to have Character as a prefab, and when character moves the physics of that movement affect the joins but it doesn’t.

Any idea how to fix this issue? thanks!

2

Don’t use parenting.

Moving the parent also moves the child legs. It moves them first, “by magic.” Then the physics step sees the leg is perfectly under the body, so has no reason to do anything.