Global heading of an object

hi
I need an objects global heading not it's local heading or transform.forward.

Imagine an aircraft having to yaw into wind as it flies forward.

It's the same kind of heading a GPS gives as it looks at the angle from to consecutive points. In a boat it's known as COG ( course over ground ) and is not the direction the boat is necessarily facing.

Anyway, if I've made any sense, I'd appreciate some help, thanks.

 

are you using a rigidbody?

 

Draw us a picture?

 

LeftyRighty, yes I am, that's how I manage this movement, so an add force from the side. And BoredMormon, I'll draw a picture asap.
Thanks

 

If you are using a rigidbody do you simply want to read rigidbody.velocity? You can normalize it if you need a unit vector.

 

looks good, thanks BoredMormon, so I'm trying:

Code (CSharp):

1. float angle = (Mathf.Atan2(transform.rigidbody.velocity.x,transform.rigidbody.velocity.z) * Mathf.Rad2Deg);
2.  
3.             angle = (angle + 360f) % 360f;

looks good so far.

 

Just to add if anyone needs this kind of thing, the SOG ( speed over ground ) is 'transform.rigidbody.velocity.magnitude' but my forward (local) speed ( which is the same as SOG if there are no side forces) is:

Code (CSharp):

1. SPD = transform.rigidbody.velocity - sideForceVector;
2. SPD.magnitude;
3. //test
4. Debug.DrawRay (transform.position, SPD, Color.red);