rigidbody.velocity move relative to local axis

Questions & Answers
1

I am trying to make the player move towards the way it’s facing, but even though it’s rotated it still moves relative to the global axis. how do i make it move relative to it’s local axis?
this is my code so far:

    Vector2 direction = new Vector2 (); 
    direction.x = Input.GetAxisRaw ("Horizontal"); 
    direction.y = Input.GetAxisRaw ("Vertical"); 
    direction.Normalize (); 
    rig.velocity = direction * walkSpeed * runMultiplier * Time.deltaTime;
2

This can be handled pretty quickly using Transform.InverseTransformDirection():

// ...
direction.Normalize();
direction = transform.InverseTransformDirection(direction);
rig.velocity = direction * walkSpeed * runMultiplier * Time.deltaTime;