void Update(){if(Input.GetMouseButtonDown(0)){GetComponent<Renderer>().material.color = new Color(Random.value, Random.value, Random.value, 1.0f);}}

        public override void Raycast(PointerEventData eventData, List<RaycastResult> resultAppendList){if (canvas == null)return;// Convert to view space
            Vector2 pos;if (eventCamera == null)pos = new Vector2(eventData.position.x / Screen.width, eventData.position.y / Screen.height);elsepos = eventCamera.ScreenToViewportPoint(eventData.position);// If it's outside the camera's viewport, do nothingif (pos.x < 0f || pos.x > 1f || pos.y < 0f || pos.y > 1f)return;float hitDistance = float.MaxValue;Ray ray = new Ray();if (eventCamera != null)ray = eventCamera.ScreenPointToRay(eventData.position);if (canvas.renderMode != RenderMode.ScreenSpaceOverlay && blockingObjects != BlockingObjects.None){float dist = eventCamera.farClipPlane - eventCamera.nearClipPlane;if (blockingObjects == BlockingObjects.ThreeD || blockingObjects == BlockingObjects.All){RaycastHit hit;if (Physics.Raycast(ray, out hit, dist, m_BlockingMask)){hitDistance = hit.distance;}}if (blockingObjects == BlockingObjects.TwoD || blockingObjects == BlockingObjects.All){RaycastHit2D hit = Physics2D.Raycast(ray.origin, ray.direction, dist, m_BlockingMask);if (hit.collider != null){hitDistance = hit.fraction * dist;}}}m_RaycastResults.Clear();Raycast(canvas, eventCamera, eventData.position, m_RaycastResults);for (var index = 0; index < m_RaycastResults.Count; index++){var go = m_RaycastResults[index].gameObject;bool appendGraphic = true;if (ignoreReversedGraphics){if (eventCamera == null){// If we dont have a camera we know that we should always be facing forwardvar dir = go.transform.rotation * Vector3.forward;appendGraphic = Vector3.Dot(Vector3.forward, dir) > 0;}else{// If we have a camera compare the direction against the cameras forward.var cameraFoward = eventCamera.transform.rotation * Vector3.forward;var dir = go.transform.rotation * Vector3.forward;appendGraphic = Vector3.Dot(cameraFoward, dir) > 0;}}if (appendGraphic){float distance = 0;if (eventCamera == null || canvas.renderMode == RenderMode.ScreenSpaceOverlay)distance = 0;else{// http://geomalgorithms.com/a06-_intersect-2.htmldistance = (Vector3.Dot(go.transform.forward, go.transform.position - ray.origin) / Vector3.Dot(go.transform.forward, ray.direction));// Check to see if the go is behind the camera.if (distance < 0)continue;}if (distance >= hitDistance)continue;var castResult = new RaycastResult{gameObject = go,module = this,distance = distance,index = resultAppendList.Count,depth = m_RaycastResults[index].depth,sortingLayer =  canvas.sortingLayerID,sortingOrder = canvas.sortingOrder};resultAppendList.Add(castResult);}}}

        protected override void OnEnable(){base.OnEnable();CacheCanvas();GraphicRegistry.RegisterGraphicForCanvas(canvas, this);#if UNITY_EDITORGraphicRebuildTracker.TrackGraphic(this);
#endifif (s_WhiteTexture == null)s_WhiteTexture = Texture2D.whiteTexture;SetAllDirty();SendGraphicEnabledDisabled();}

        public static void RegisterGraphicForCanvas(Canvas c, Graphic graphic){if (c == null)return;IndexedSet<Graphic> graphics;instance.m_Graphics.TryGetValue(c, out graphics);if (graphics != null){graphics.Add(graphic);return;}graphics = new IndexedSet<Graphic>();graphics.Add(graphic);instance.m_Graphics.Add(c, graphics);}

    bool CheckGuiRaycastObjects(){PointerEventData eventData = new PointerEventData(Main.Instance.eventSystem);eventData.pressPosition = Input.mousePosition;eventData.position = Input.mousePosition;List<RaycastResult> list = new List<RaycastResult>();Main.Instance.graphicRaycaster.Raycast(eventData, list);//Debug.Log(list.Count);return list.Count > 0;}

    void Update () {if (CheckGuiRaycastObjects()) return;//Debug.Log(EventSystem.current.gameObject.name);if (Input.GetMouseButtonDown(0)){Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);RaycastHit hit;if (Physics.Raycast(ray, out hit)){//do some thing
            }}}