GUIUtility.ScaleAroundPivot 沿轴缩放

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
	private Vector2 scale = new Vector2(1, 1);
	private Vector2 pivotPoint;
	void OnGUI() {
		pivotPoint = new Vector2(Screen.width / 2, Screen.height / 2);
		GUIUtility.ScaleAroundPivot(scale, pivotPoint);
		if (GUI.Button(new Rect(Screen.width / 2 - 25, Screen.height / 2 - 25, 50, 50), "Big!"))
			scale += new Vector2(0.5F, 0.5F);

	}
}

// Scale a button by 1.5 times each time is pressed.
//每次点击按钮，缩放1.5倍
private var scale : Vector2 = Vector2(1,1);
private var pivotPoint : Vector2;

function OnGUI () {
	pivotPoint = Vector2(Screen.width/2,Screen.height/2);
	GUIUtility.ScaleAroundPivot (scale, pivotPoint);
	if(GUI.Button(Rect(Screen.width/2-25, Screen.height/2-25, 50, 50),"Big!")){
		scale += Vector2(0.5,0.5);
	}
}