AddForceAtPosition Direction Relative To Parent?

Question

Hey there :)

How do you change the direction of which the force comes from with AddForcePosition, and make it relative to the parent?

Here's the sample of code im using:

 rigid.AddForceAtPosition(Vector3(0,0,100), transform.position);

This adds the force in the correct position, however it moves the object in a global direction on the Z plane.

I want the force to always move in the direction the rigidbody is facing.

I feel this could be done by taking away the rotation of the object from the force vector. But I cant get my head around it! :/

Thanks for your time, Magnus :D

Answer 1

Best Answer

Answer by robertbu · Aug 23, 2013 at 05:27 PM

If you want a direction relative to the parent, use Transform.TransformDirection();

 var direction = transform.parent.TransformDirection(Vector3(0,0,100));

This takes the Vector3 in local space and transforms it into global space.

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