Help understand moveDirection = transform.TransformDirection(moveDirection);

Question

var speed:float=10.0;

var controller:CharacterController=GetComponent(CharacterController);

moveDirection=Vector3(Input.GetAxis("Horizontal"),0,Input.GetAxis("Vertical"));

moveDirection = transform.TransformDirection(moveDirection);

moveDirection *= speed;

controller.Move(moveDirection * Time.deltaTime);

From code above:

It seem lines 3 and 4 have same job, assign value to Vector3, so why we add line 4?

Answer 1

Answer by fafase · Dec 14, 2012 at 08:11 AM

 var speed:float=10.0;

this one is the speed you got it

 var controller:CharacterController=GetComponent(CharacterController);

this one fetches the CharacterController component and should be put in the Start function

 moveDirection=Vector3(Input.GetAxis("Horizontal"),0,Input.GetAxis("Vertical"));

this one gets the input and stores it in moveDirection

 moveDirection = transform.TransformDirection(moveDirection);

This one converts moveDirection(the input) from local to world space and stores it in moveDirection

 moveDirection *= speed;

this one multiplies moveDirection by the speed

 controller.Move(moveDirection * Time.deltaTime);

And finally the vector is passed to the character controller with the Move function.

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