判断鼠标是否在UI上，可以判断鼠标是否在指定的某一个Canvas上，多个Canvas可分别判断。
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using UnityEngine.EventSystems;public class HelpScript : MonoBehaviour
{#region 判断鼠标是否在UI上/// <summary>/// 判断鼠标是否在指定的Canvas上，若返回为flase，则不再，若返回为true，则在指定canvas的UI上，可多个Canvas同时判断/// </summary>/// <param name="GO_Canvas">用于指定的UI</param>/// <returns></returns>public static bool GetOverUI(GameObject GO_Canvas){PointerEventData _PointerEventData = new PointerEventData(EventSystem.current);_PointerEventData.position = Input.mousePosition;GraphicRaycaster _GR = GO_Canvas.GetComponent<GraphicRaycaster>();List<RaycastResult> _Results = new List<RaycastResult>();_GR.Raycast(_PointerEventData, _Results);if (_Results.Count != 0){return true;}return false;}#endregion
}//end Class相机的射线检测类，鼠标射线的碰撞检测，鼠标悬停在物体上、鼠标点选物体等触发的事件。下方的第一个脚本为相机更新和事件绑定脚本，第二个脚本为事件触发脚本。
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Events;
using System;
/// <summary>
/// 序列化，场景一个unity的射线检测类
/// </summary>
[Serializable]
public class RaycastEvent :UnityEvent<RaycastHit> { }
/// <summary>
/// 相机的射线控制（脚本挂靠物体必须有相机）
/// </summary>
[RequireComponent(typeof(Camera))]
public class Control_CameraRaycaster : MonoBehaviour
{/// <summary>/// 事件更新类型枚举,判断事件在更新类型上更新/// </summary>public enum UpdateEvent {Update,LateUpdate,OnPreCull,OnPreRender,OnPostRender,}#region Public Paramater/// <summary>/// 事件更新类型/// </summary>public UpdateEvent updateEvent = UpdateEvent.LateUpdate;/// <summary>/// 忽略层/// </summary>public LayerMask layerMask = -1;/// <summary>/// 射线长度 （-1 = infinity )/// </summary>public float rayLength = -1;/// <summary>/// 悬停时出发的事件/// </summary>public RaycastEvent Event_OnHover;#endregion#region Private Paramaterprivate Camera _Camera;#endregion#region Unity Methodprivate void Awake() {_Camera = this.GetComponent<Camera>();}private void Update() {PerformRaycast(UpdateEvent.Update);}void LateUpdate() {PerformRaycast(UpdateEvent.LateUpdate);}void OnPreCull() {PerformRaycast(UpdateEvent.OnPreCull);}void OnPreRender() {PerformRaycast(UpdateEvent.OnPreRender);}void OnPostRender() {PerformRaycast(UpdateEvent.OnPostRender);}#endregion#region Perform Raycast 执行光线投射/// <summary>/// 执行光线投射事件/// </summary>/// <param name="currentEvent"></param>void PerformRaycast(UpdateEvent currentEvent) {if (currentEvent != updateEvent) { return; }if (_Camera == null) { return; }if (Event_OnHover == null) {return;}//射线碰撞信息RaycastHit hitInfo;//射线Ray ray = _Camera.ScreenPointToRay(Input.mousePosition);//射线是否碰撞if (Physics.Raycast(ray, out hitInfo, rayLength >= 0f ? rayLength : Mathf.Infinity, layerMask.value)) {//鼠标悬停在物体上Event_OnHover.Invoke(hitInfo);}}#endregion
}
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
//高亮
using HighlightingSystem;
/// <summary>
/// 摄像机射线事件
/// </summary>
public class CameraRaycasterEvent : MonoBehaviour
{/// <summary>/// 鼠标悬停事件/// </summary>/// <param name="hitInfo"></param>public void OnHoverMethod(RaycastHit hitInfo) {Transform Trans = hitInfo.collider.transform;if (Trans == null) { return; }//鼠标点击物体出发的所有事件if (Input.GetMouseButtonDown(0)) {//点击带有 Interface_RaycastHitInfo 接口的物体var interfaceRaycastHit = Trans.GetComponentInParent<Interface_RaycastHitInfo>();if (interfaceRaycastHit != null) {interfaceRaycastHit.GetRaycastHitInfo(hitInfo);}}}
}
/// <summary>
/// 摄像机射线的信息获取,所有需要用摄像机的射线来触发事件的物体，必须继承此接口
/// </summary>
public interface Interface_RaycastHitInfo {void GetRaycastHitInfo(RaycastHit raycastHit);
}