NGUI之使用UISprite画线

代码如下：

 1         static void DrawLine(UISprite spriteLine, Vector3 start, Vector3 end)
 2         {
 3             Vector3 center = (start + end) / 2f;
 4             Vector3 fromStart = end - start;
 5             Vector3 horVector = Vector3.right;
 6             Quaternion rot = Quaternion.FromToRotation(horVector, fromStart);
 7 
 8             spriteLine.transform.localPosition = center;
 9             spriteLine.transform.localRotation = rot;
10             spriteLine.width = Mathf.CeilToInt(fromStart.magnitude);
11         }

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