Smoothly object transition through lerp and coroutine

Asked Apr 17 '17 at 07:16

Active Apr 18 '17 at 05:08

Viewed 89 times

IEnumerator SmoothlyShiftPosition(Vector3 destination, float OverTime) {

    float startTime = 0;
    while (startTime < OverTime)
    {
        Debug.Log(startTime/OverTime + "changing: " + navigationCanvas.transform.position);
        Debug.Log("startTime : " + startTime);
        navigationCanvas.transform.position = Vector3.Lerp(navigationCanvas.transform.position, destination, startTime/OverTime);
        startTime += Time.deltaTime * 2f;
        yield return null;
    }
    navigationCanvas.transform.position = destination;
}

I have this simple code snippet which i am using to lerp my object to specfied position smoothly it work sometime correctly but not always. I logged different data and found that my startTime variable sometime becomes zero continuously. I am unable to figure why this occuring? what i am doing wrong

I am calling my coroutine like this

if (SmoothlyShiftPositionIEum != null) {
                            StopCoroutine(SmoothlyShiftPositionIEum);
                        }
                       SmoothlyShiftPositionIEum = StartCoroutine(SmoothlyShiftPosition(navCanvas, smoothPositionTime));

edited Apr 18 '17 at 05:08

asked Apr 17 '17 at 07:16

Muhammad Faizan Khan

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@Programmer you should need to understand question first – Muhammad Faizan Khan Apr 17 '17 at 07:30
Can you show the code that starts the coroutine? – Leo Bartkus Apr 17 '17 at 17:41
@LeoBartkus i have updated my question – Muhammad Faizan Khan Apr 18 '17 at 05:08
Are you sure you aren't stopping and re-starting the coroutine every update()? – Leo Bartkus Apr 18 '17 at 16:11
@LeoBartkus at some condition this thing is happening – Muhammad Faizan Khan Apr 24 '17 at 06:38
Yea, what condition calls the coroutine? If your coroutine calling code happens every update, it will stop the coroutine every update. This will reset the startTime to 0 over and over. Because startTime exists inside the coroutine's scope, a new startTime variable is created and initialized each time you restart it. – Leo Bartkus Apr 24 '17 at 16:16

Smoothly object transition through lerp and coroutine

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