世界坐标转到UGUI坐标

1. public static Vector3 WorldToUI(Camera camera,Vector3 pos){  
2.         CanvasScaler scaler = GameObject.Find("UIRoot").GetComponent<CanvasScaler>();  
3.   
4.         float resolutionX = scaler.referenceResolution.x;  
5.         float resolutionY = scaler.referenceResolution.y;  
6.   
7.         Vector3 viewportPos = camera.WorldToViewportPoint(pos);  
8.   
9.         Vector3 uiPos = new Vector3(viewportPos.x * resolutionX - resolutionX * 0.5f,  
10.             viewportPos.y * resolutionY - resolutionY * 0.5f,0);  
11.   
12.         return uiPos;  
13. }  
14. public static Vector2 WorldToUIPoint(Transform worldGo)  
15.     {  
16.         Vector2 pos;  
17.         RectTransformUtility.ScreenPointToLocalPointInRectangle(canvas.transform as RectTransform,  
18.             gameCamera.WorldToScreenPoint(worldGo.transform.position), canvas.worldCamera, out pos);  
19.         RectTransform rect = transform.transform as RectTransform;  
20. rect.anchoredPosition = pos; 
    
21.         return pos;  
22. }