How to change scale of a GameObject in unity by C# in runtime

 Transform component of a gameObject contains its position, rotation, and scale relative to its parent. We can change size of a gameObject by changing transform.localScale property. here are few ways of changing size by C# script.

By changing localScale

An example of changing scale a gameObject named "MyObject" to (2, 2, 2) is given below:

Code :

GameObject MyObject;

void Start()

{

    MyObject = GameObject.Find("MyObject");

    MyObject.transform.localScale = new Vector3(2, 2, 2);

}

here first we declare a MyObject of type GameObject and we set to reference by our desired object in start method by GameObject.Find("MyObject") method then change scale by MyObject.transform.localScale = new Vector3(2, 2, 2);

Coroutine Method

If we want to change size of a gameObject over time then we can use a Coroutine or Lerp function. An example coroutine for increasing scale of gameObject by every 0.1 second is given below:

Code :

IEnumerator ScaleOverTime()

{

    while (MyObject.transform.localScale.x < 2)

    {

        MyObject.transform.localScale += new Vector3(0.1f, 0.1f, 0.1f);

        yield return new WaitForSeconds(1);

    }

}

After that we can use StartCoroutine() to call this coroutine method

Code :

StartCoroutine(ScaleOverTime());

By using Vector3.Lerp

We can also use Vector3.Lerp() method to change scale of a gameObject with time. An example code is given below:

Code :

void Update()

{

    MyObject.transform.localScale = Vector3.Lerp(MyObject.transform.localScale, new Vector3(2, 2, 2), Time.deltaTime);

}

You can change scale of a gameObject by changing transform.localScale property. You can change scale across all three axis at once or one at each time.You can also use transform.localScale.x, transform.localScale.y, transform.localScale.z to change scale at perticular axis.