Lerp Gameobjects..

Questions & Answers
1

I know this topic has been plastered all over, but it is unbaringly horrid to try and traverse through many different peoples methods to find what I am looking for.

All I am after is something the moves from A to B within a time frame thats it. no special features, no smoothing, just a basic, in and out within a time.

My current code, which obviously doesnt work (works okay. but doesnt have a ‘smooth’ movement, it just goes from a to b in an instant, how can I make it so the ‘speed’ actually is taken into accordance?

    public void openBottom()
    {
        bottomDraw.transform.localPosition = new Vector3(bTempX, bTempY, Mathf.Lerp(closePos, openPos, speed));
        bottomOpen = true;
    }

    public void closeBottom()
    {
        bottomDraw.transform.localPosition = new Vector3(bTempX, bTempY, Mathf.Lerp(openPos, closePos, speed));
        bottomOpen = false;
    }
2

If you want something that moves linearly between A and B over a set period of time, then you need to keep track of time itself;

//Lerp start
public Vector3 start;
//Lerp end
public Vector3 end;
//Total time of the lerp in seconds
public float seconds = 2f;

private float startTime = 0f;
private bool runFunction = false;

void Update ()
{
	//Start the coroutine once when the space key is pressed
	if (Input.GetKeyDown (KeyCode.Space))
		StartCoroutine (LerpPosition (start, end, seconds));

	//Alternatively, run the function and set the current time when the mouse is clicked
	if (Input.GetKeyDown (KeyCode.Mouse0) && !runFunction)
	{
		startTime = Time.time;
		runFunction = true;
	}

	if (runFunction)
	{
		LerpPosition2 (start, end, seconds);
	}
}

private bool isRunning = false;

//I'm using an enumerator to make things a bit easier, but there's also an example with a normal function below
IEnumerator LerpPosition (Vector3 a, Vector3 b, float s)
{
	if (isRunning)
		yield break;

	isRunning = true;

	float startTime = 0f;
	float time = startTime;

	while (time < s)
	{
		transform.position = Vector3.Lerp (a, b, (time - startTime) / s);
		time += Time.deltaTime;
		yield return null;
	}

	isRunning = false;
}

void LerpPosition2 (Vector3 a, Vector3 b, float s)
{
	float time = (Time.time - startTime) / s;

	transform.position = Vector3.Lerp (a, b, time);

	if (time >= 1f)
		runFunction = false;
}