Trying to use JointMotor, nothing happens

Questions & Answers
1

Hi, I’m trying to control a joint with the built-in JointMotor,
but nothing happens.

Here’s my code…

    public static GameObject c1;
    public static GameObject c2;
    public static JointMotor m;
    
    void Start() {
    	c1 = GameObject.CreatePrimitive(PrimitiveType.Cube);
    	c1.transform.position = new Vector3(0f, 1f, 0f);
    	c1.transform.localScale = new Vector3(1f, 2f, 0.3f);
    	
    	c2 = GameObject.CreatePrimitive(PrimitiveType.Cube);
    	c2.transform.position = new Vector3(0f, 3.1f, 0f);
    	c2.transform.localScale = new Vector3(1f, 2f, 0.3f);
    	
    	c1.AddComponent<Rigidbody>();
    	c1.rigidbody.mass = 1f;
    	
    	c2.AddComponent<Rigidbody>();
    	c2.rigidbody.mass = 1f;
    
    	c1.AddComponent<HingeJoint>();
    	c1.hingeJoint.anchor = new Vector3(0f, 0.5f, 0f);
    	c1.hingeJoint.axis = new Vector3(1f, 0f, 0f);
    	c1.hingeJoint.connectedBody = c2.rigidbody;
    	c1.hingeJoint.useMotor = true;

        m = new JointMotor();
 	    c1.hingeJoint.motor = m;
    }
    
    void Update() {
    	m.force = 100f;
    	m.targetVelocity = 1000f; // just trying high numbers to be sure something happens, but nothing happens
    }

…

Two cubes are created, their physics works and the HingeJoint work.
The motor doesn’t work though… No movement, the two cubes just fall to the ground.
It’s the same as if I would remove all the motor code.

Please help! Thank you

2

Found the solution. Why do I always find a solution a short while after posting a question… even though I post questions after hours/days of trying to solve it.

It was as simple as this:

m = new JointMotor();
m.force = 100f;
m.targetVelocity = 1000f;
c1.hingeJoint.motor = m;

Apparently I couldn’t change the force after setting the motor to m.
If anybody knows why, please tell me!