add

Assets/CoolapeFrame/3rd/NGUI_Enhance/Examples/Scripts/Other/WindowDragTilt.cs

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+using UnityEngine;
+
+/// <summary>
+/// Attach this script to a child of a draggable window to make it tilt as it's dragged.
+/// Look at how it's used in Example 6.
+/// </summary>
+
+[AddComponentMenu("NGUI/Examples/Window Drag Tilt")]
+public class WindowDragTilt : MonoBehaviour
+{
+	public int updateOrder = 0;
+	public float degrees = 30f;
+
+	Vector3 mLastPos;
+	Transform mTrans;
+	float mAngle = 0f;
+
+	void OnEnable ()
+	{
+		mTrans = transform;
+		mLastPos = mTrans.position;
+	}
+
+	void Update ()
+	{
+		Vector3 deltaPos = mTrans.position - mLastPos;
+		mLastPos = mTrans.position;
+
+		mAngle += deltaPos.x * degrees;
+		mAngle = NGUIMath.SpringLerp(mAngle, 0f, 20f, Time.deltaTime);
+
+		mTrans.localRotation = Quaternion.Euler(0f, 0f, -mAngle);
+	}
+}