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Question by fpdotmonkey · Jun 27, 2017 at 01:52 PM · gameobjectjointchild objectparent-child

Modifying HingJoint2D in a child GameObject

I have a prefab built with this structure:

 Parent GameObject
 - Child1 GameObject
     - Rigidbody2D
     - HingeJoint2D
 - Child2 GameObject
     - Rigidbody2D

I would like to increase the velocity of the motor on the HingeJoint2Dwhen I hold click on the prefab. I have the following code code attached to Parent to do this, but I am getting an error saying that I have no HingeJoint2D attached to Parent. How then do I access the HingeJoint2D in Child1?

 public class SpinUp : MonoBehaviour {
     void Start() {
         hinge = GetComponent<HingeJoint2D>();
         motor = hinge.motor;
     }

     void OnMouseDrag() {
         accelerateMotor();
     }

     private void accelerateMotor() { /* whatever */ }
 }
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