Rotating and Stoping in mid of rotation with co-routines

Questions & Answers
1

Hello,
I have an object that has 10 children which surround him in a circle.
There’s 5 object in-front of me at any given moment, and one of them is highlighted.
When I rotate my parent object by 36 degrees, they all move so the next one is highlighted (depending on left/right rotation).
I’ve managed to write properly the rotation with coroutine. I’m struggling now with stop the co-routine in the middle of the motion and return back to where it came from.
For example if I start from 0 to 36 and I want to stop in 18 degrees and move back to 0 (If I moved left and now decided to move right), it won’t work properly.
I’m trying to get the eulerangles.y when stop the motion but it’s not always a range between 1-35… It’s like 358, -21 and so on.

Here’s what I’ve done so far:

using System.Collections;
using System.Collections.Generic;
using UnityEngine;


public class ResultsRotator : MonoBehaviour
{

    public bool doSwipe = false;
    public bool swipeRight = false;
    public float speed = 1f;
    Quaternion rotation = Quaternion.identity;
    float angle = 0f;
    public bool rightSwipe = false;
    public bool leftSwipe = false;
    private Coroutine co;
    public float currAngle = 0;
    public float prevAngle = 0;
    public float howMuchRotated = 0;
    // Use this for initialization
    void Start()
    {
        transform.eulerAngles = new Vector3(0, currAngle, 0);
    }


    // Update is called once per frame
    void Update()
    {
        if (Input.GetKeyDown("right"))
        {
            if (rightSwipe == false && leftSwipe == false)
                co = StartCoroutine(ToRight(1f));
            else if (leftSwipe == true)
            {
                StopCoroutine(co);
                co = null;
                howMuchRotated = transform.eulerAngles.y - prevAngle;
                currAngle = transform.eulerAngles.y;
                co = StartCoroutine(ToRight(1f));
                leftSwipe = false;
            }
        }
        if (Input.GetKeyDown("left"))
        {
            if (leftSwipe == false && rightSwipe == false)
                co = StartCoroutine(ToLeft(1f));
            else if (rightSwipe == true)
            {
                StopCoroutine(co);
                co = null;
                Debug.Log("A " + transform.eulerAngles.y);
                Debug.Log("B " + prevAngle);
                howMuchRotated = 0;
                Debug.Log(howMuchRotated);
                currAngle = transform.eulerAngles.y;
                co = StartCoroutine(ToLeft(1f));
                rightSwipe = false;
            }

        }
    }

    IEnumerator ToRight(float duration)
    {
        Debug.Log("Turning right");
        Debug.Log("PrevAngle: " + prevAngle);
        rightSwipe = true;
        float startRotation = currAngle;
        Debug.Log("Start Rotation: " + startRotation);
        float endRotation;

        if (startRotation % 36 != 0f)
        {
            Debug.Log("Rtest" + startRotation + " " + currAngle);
            endRotation = startRotation - currAngle;
        }
        else
            endRotation = startRotation - 36f;
        float t = 0.0f;
        Debug.Log("End Rotation: " + endRotation);
        while (t < duration)
        {

            t += Time.deltaTime;
            float yRotation = Mathf.Lerp(startRotation, endRotation, t / duration) % 360.0f;
            transform.eulerAngles = new Vector3(transform.eulerAngles.x, yRotation, transform.eulerAngles.z);
            yield return null;
        }
        prevAngle = endRotation + 36;
        currAngle = endRotation;
        rightSwipe = false;
        co = null;
    }

    IEnumerator ToLeft(float duration)
    {
        Debug.Log("Turning left");
        Debug.Log("PrevAngle: " + prevAngle);
        leftSwipe = true;
        float startRotation = currAngle;
        Debug.Log("Start Rotation: " + startRotation);
        float endRotation;

        if (startRotation % 36 != 0f)
        {
            Debug.Log("Ltest " + startRotation + " " + currAngle);
            endRotation = startRotation + (360 - currAngle);
        }
        else
        {
            endRotation = startRotation + 36f;
        }

        Debug.Log("End Rotation: " + endRotation);
        float t = 0.0f;
        while (t < duration)
        {
            t += Time.deltaTime;
            float yRotation = Mathf.Lerp(startRotation, endRotation, t / duration) % 360.0f;
            transform.eulerAngles = new Vector3(transform.eulerAngles.x, yRotation, transform.eulerAngles.z);
            yield return null;
        }
        prevAngle = endRotation - 36;
        currAngle = endRotation;
        leftSwipe = false;
        co = null;
    }
}
2

Almost solved. The only problem now is if I click fast left, right, left,right non-stop it does unknown behaviour… like always tries to rotate left/right a lil bit to every degree.

using System.Collections;
using System.Collections.Generic;
using UnityEngine;


public class ResultsRotator : MonoBehaviour
{

    public bool doSwipe = false;
    public bool swipeRight = false;
    public float speed = 1f;
    Quaternion rotation = Quaternion.identity;
    float angle = 0f;
    public bool rightSwipe = false;
    public bool leftSwipe = false;
    private Coroutine co;
    public float currAngle = 0;
    public float prevAngle = 0;
    public float howMuchRotated = 0;
    public float tempHowMuchRotated = 0;
    public float startRotation = 0;
    // Use this for initialization
    void Start()
    {
        transform.eulerAngles = new Vector3(0, currAngle, 0);
    }


    // Update is called once per frame
    void Update()
    {
        if (Input.GetKeyDown("right"))
        {
            if (rightSwipe == false && leftSwipe == false)
                co = StartCoroutine(ToRight(1f));
            else if (leftSwipe == true)
            {
                StopCoroutine(co);
                co = null;
                tempHowMuchRotated = howMuchRotated;
                Debug.Log("Prev :" + prevAngle);
                currAngle = prevAngle + tempHowMuchRotated;
                Debug.Log("curr :" + currAngle);
                co = StartCoroutine(ToRight(1f));
                leftSwipe = false;
            }
        }
        if (Input.GetKeyDown("left"))
        {
            if (leftSwipe == false && rightSwipe == false)
                co = StartCoroutine(ToLeft(1f));
            else if (rightSwipe == true)
            {
                StopCoroutine(co);
                co = null;
                tempHowMuchRotated = howMuchRotated;
                currAngle = prevAngle - tempHowMuchRotated;
                co = StartCoroutine(ToLeft(1f));
                rightSwipe = false;
            }

        }
    }

    IEnumerator ToRight(float duration)
    {
        Debug.Log("Turning right");
        prevAngle = currAngle;
        Debug.Log("PrevAngle: " + prevAngle);
        rightSwipe = true;
         startRotation = currAngle;
        Debug.Log("Start Rotation: " + startRotation);
        float endRotation;

        if (startRotation % 36 != 0f)
        {
            Debug.Log("Rtest" + startRotation + " " + tempHowMuchRotated);
            endRotation = startRotation - tempHowMuchRotated;
        }
        else
            endRotation = startRotation - 36f;
        float t = 0.0f;
        Debug.Log("End Rotation: " + endRotation);
        while (t < duration)
        {
            t += Time.deltaTime;
            float yRotation = Mathf.Lerp(startRotation, endRotation, t / duration) % 360.0f;
            howMuchRotated = Mathf.Lerp(0, 36, t / duration);
            transform.eulerAngles = new Vector3(transform.eulerAngles.x, yRotation, transform.eulerAngles.z);
            yield return null;
        }
        currAngle = endRotation;
        prevAngle = startRotation;
        rightSwipe = false;
        co = null;
    }

    IEnumerator ToLeft(float duration)
    {
        Debug.Log("Turning left");
        prevAngle = currAngle;
        Debug.Log("PrevAngle: " + prevAngle);
        leftSwipe = true;
         startRotation = currAngle;
        Debug.Log("Start Rotation: " + startRotation);
        float endRotation;

        if (startRotation % 36 != 0f)
        {
            Debug.Log("Ltest " + startRotation + " " + tempHowMuchRotated);
            endRotation = startRotation + tempHowMuchRotated;
        }
        else
        {
            endRotation = startRotation + 36f;
        }

        Debug.Log("End Rotation: " + endRotation);
        float t = 0.0f;
        while (t < duration)
        {
            t += Time.deltaTime;
            float yRotation = Mathf.Lerp(startRotation, endRotation, t / duration) % 360.0f;
            howMuchRotated = Mathf.Lerp(0, 36, t / duration);
            transform.eulerAngles = new Vector3(transform.eulerAngles.x, yRotation, transform.eulerAngles.z);
            yield return null;
        }
        currAngle = endRotation;
        prevAngle = startRotation;
        leftSwipe = false;
        co = null;
    }
}