CODEWITHSUNDEEP
unity-game-enginerotation2d
TommyE
TommyE

Reputation: 368

Unity - Rotate an object around a point in 2D

I've been working on a 2D game in Unity and I need to find a way to rotate a sprite around a certain point. I know that for 3D games, Unity has a built in transform.RotateAround() function but I'm not sure how to achieve the 2D equivalent. If anybody can help, a response would be much appreciated.

Upvotes: 2

Views: 26164

Answers (3)

yhoyo
yhoyo

Reputation: 207

actually you can use some GameObject as anchor:

    public GameObject anchor;
    public float velocidad;
    void Start () {
        velocidad = 50f;
    }

    // Update is called once per frame
    void FixedUpdate () {

        transform.RotateAround(anchor.transform.localPosition, Vector3.back, Time.deltaTime*velocidad);
    }

Upvotes: 2

pseudoabdul
pseudoabdul

Reputation: 636

If you are struggling to get your head around these transformation functions, there is an alternative way to do it. Simple create a new gameobject at the point you wish to rotate around. Then make the sprite a child of that game object. When you rotate the game object the sprite should move about that point.

Upvotes: 5

Adam Stox
Adam Stox

Reputation: 457

You can use the same function. transform.RotateAround() takes a Vector3 point, a Vector3 axis, and a float angle in degrees.

the point and angle are pretty self explanitory, but the axis is a little less so. This is essentially the direction of rotation. In a default Unity2D game where z is your depth (into the screen), you'll want to rotate around the Z axis: new Vector3(0,0,1) or Vector3.forward.

try something like: 

Vector3 point = new Vector3(5,0,0);
Vector3 axis = new Vector3(0,0,1);
transform.RotateAround(point, axis, Time.deltaTime * 10);

Upvotes: 4

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