Get GameObject last and current transform.position from script

Question

i want to be able to know the following positions when animating an object:

Last Frame transform.position
Current transform.position

i know how can i get the current transform.position just by asking transform.position in the LateUpdate(){} callback. but how can i get the last frame position?

Thanks!

Why don't you just store current transform.position so that when the next Update is called you can read and use this variable which will be last frame transform.position? — Unai
There is no need to think - that is literally the way to do it. — Tom 'Blue' Piddock

Tom 'Blue' Piddock Tom 'Blue' Piddock · Accepted Answer · 2015-02-04T11:53:30

This is the basic structure behind it:

class PositionUpdaterThing
{
    Vector3 _lastPosition;

    void Update() 
    {
        // get current position
        currentPosition = transform.position;

        // do anything you need to with the positions
        DoStuff(currentPosition, _lastPosition);

        // set last to current so the next frame of Update() is ready
        _lastPosition = transform.position;
    }

    void Start()
    {
        // set initial value for lastPosition
        _lastPosition = transform.position;
    }
}

Get GameObject last and current transform.position from script

1 Answers