Rotating a 2D GameObject on Z regardless of the distance.

Question

Hello Unity Answers and happy new year to all,

I have a GameObject which I move on mouse click. The movement of the GameObject depends on mouse click position. Now a user can click anywhere on the screen and the GameObject will move to the click position, but I want the GameObject to move to that point with a 360 degree rotation. No matter how much distance it has to travel it should be only 360 degrees rotation. Please look at the image below. Hope it might clear the idea.

![alt text][1]

As you can see in the ugly image above, no matter the distance the Object has to travel it should reach the target point with exact 360 degree rotation. I hope I have made my problem clear.

Thanks in advance for the help. [1]: /storage/temp/130330-untitled-1.png

Answer 1

Best Answer

Answer by Mehul-Rughani · Jan 01 at 11:44 AM

Hello, Have you tried Coroutine? if not please try this

 public Transform target;
     public Vector3 targetPosition;
 
     void Start ()
     {
         StartCoroutine (MoveToPosition (targetPosition, 2));
     }
 
     IEnumerator MoveToPosition (Vector3 targetPosition, float time = 1)
     {
         float i = 0;
         Vector3 tempPosition = target.position;
         Vector3 tempRotation = target.eulerAngles;
         while (i < 1) {
             i += Time.deltaTime / time;
             target.position = Vector3.Lerp (tempPosition, targetPosition, i);
             target.eulerAngles = Vector3.Lerp (tempRotation, new Vector3 (0, 0, 360), i);
             yield return 0;
         }
     }

this Coroutine will move target to targetposition with 360 rotation in time you have passed. Here in start I have passed 2 so it will move object to target position in 2 sec(by default it will be 1 sec) with 360 rotation.

Hope you are looking for this.

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monish_97 · Jan 01 at 11:55 AM 0

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Thanks a lot this is exactly what I was looking for. I will have to find a proper speed value and this will work perfect. THANKS!

Mehul-Rughani monish_97 · Jan 01 at 12:11 PM 0

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you are always welcome #happy_to_help

Answer 2

Here's another solution if you know how fast the object should move, but you don't care how long it takes.

Once you have the destination, call startMoving, for example: startMoving (new Vector2 (10, 10));

EDIT: Added stopMoving method and improved the code to prevent any action when the initial distance is zero.

 public  float  distanceInitial;
 public  Vector2  positionInitial;
 public  Vector2  positionDestination;
 public  bool  isMoving;
 public  float  moveSpeed;
 
 
 private void Update ()
 {
     if (isMoving)
     {
         // Move
         transform.localPosition = Vector2.MoveTowards (transform.localPosition,  positionDestination,  moveSpeed * Time.deltaTime);
 
         float distanceCurrent = Vector2.Distance (transform.localPosition,  positionDestination);
 
         if (distanceCurrent > 0.01)
         {
             // Calculate progress from distance
             float progress = 1 - (distanceCurrent / distanceInitial);  // 0.0 .. 1.0
 
             // Rotate
             transform.localRotation = Quaternion.Euler (0,  0,  360 * progress);
         }
         else
         {
             // Destination Reached
             transform.localPosition = positionDestination;
             stopMoving ();
         }
     }
 }
 
 
 public void startMoving (Vector2 Destination)
 {
     positionInitial = transform.localPosition;
     positionDestination = Destination;
     distanceInitial = Vector2.Distance (positionInitial,  positionDestination);
 
     if (distanceInitial > 0)
     {
         isMoving = true;
     }
 }
 
 
 public void stopMoving ()
 {
     isMoving = false;  // Stop moving
     transform.localRotation = Quaternion.identity;  // Reset Rotation
 }

Rotating a 2D GameObject on Z regardless of the distance.

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