Transforming an object on its local axis.

Does anyone know how I transform an object on its local axis?

For instance, I now that the following line of code will transform an object on the world's Z-axis:

transform.localPosition.z += 1;

... but how do I tell an object to move forward by 1 unit on it's own Z-axis?

 

transform.position += transform.TransformDirection (Vector3.fwd);

 

Thanks!

Now, how do I tell an object to rotate one unit on its own axes?

:wink:

 

Man, I am cursed.

I've been using that same code but I get rotation around the world axis when I do. And I know that can't be right, since it is "transform.RotateAroundLocal" after all.

If I make a cube, rotate it on one of its axes so that is tilted, then attach this code to it, I get rotation on what appears to be the world Y axis, not the cube's Y axis (which is what I want):

function Update () {
transform.RotateAroundLocal (Vector3.up, Time.deltaTime);
}

I'm really puzzled. Any idea what could be wrong?

Thanks again for your help!

 

Ahh - seems RotateAroundLocal rotates around the PARENT's local space...

What you're looking for is:

transform.RotateAround (transform.TransformDirection (Vector3.up), Time.deltaTime);

This moves the Vector3.up from local to world space. The you rotate around THAT in world space. This will work no matter what your parenting seetup is.

 

It's still not working.

 

Whew!

So, I'm not insane after all. :wink:

Any idea when 1.0.1 will be out?

 

Any ideas on how to move an object on a different object's local axis? I'm basically trying to set up camera relative controls.

 

I'd do it like this:

1. Make a non-rendering dummy object.

2. Set the transform of the dummy equal to the transform of the object whose axis you want to move along.

3. Child the object to be moved to the dummy.

4. Translate the dummy on the axis you want to move along.

 

Or you could use that new Move command. :wink:

Boy, those Unity Elves sure are adding all sorts of cool transform commands!

 

Yeah, I noticed that in the new documents.

The new transform commands seem very streamlined now. But I still think it would be a bit cleaner to marge RotateAround into the new Rotate by adding Space=(named object) to the parameter options for Rotate. :wink:

Also, the HOWTO's added to the new documentation do not make use of the new transforms and LookAt commands, which could. For instance, the "surface tracker" HOWTO does not use LookAt, which it could.

 

Interesting, but I need to use Addforce. I'm making a simple (kinda) marble (almost) game, the view is 3rd person (obviously), and I need camera relative controls. The thing is, the player needs to be able to move the camera around the hero.

 

Thank you so much! Ah, this is why I love these forums.

 

Hmm, I'm getting this error:
" 'UnityEngine.Camera' does not contain a definition for 'TransformDirection' "

 

Also, "AddFoce" should read "AddForce".