基础内容

必要插件安装
缓动曲线和动画基础
ElementFolder，Track与其次级模块，PathNode重构

Assets/Modern UI Pack/Scripts/Context Menu/ContextMenuManager.cs

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+using UnityEngine;
+#if ENABLE_INPUT_SYSTEM
+using UnityEngine.InputSystem;
+#endif
+
+namespace Michsky.MUIP
+{
+    [RequireComponent(typeof(Animator))]
+    public class ContextMenuManager : MonoBehaviour
+    {
+        // Resources
+        public Canvas mainCanvas;
+        public Camera targetCamera;
+        public GameObject contextContent;
+        public Animator contextAnimator;
+        public GameObject contextButton;
+        public GameObject contextSeparator;
+        public GameObject contextSubMenu;
+
+        // Settings
+        [SerializeField] private bool debugMode;
+        public bool autoSubMenuPosition = true;
+        public SubMenuBehaviour subMenuBehaviour;
+        public CameraSource cameraSource = CameraSource.Main;
+
+        // Bounds
+        public CursorBoundHorizontal horizontalBound;
+        public CursorBoundVertical verticalBound;
+        [Range(-50, 50)] public int vBorderTop = -10;
+        [Range(-50, 50)] public int vBorderBottom = 10;
+        [Range(-50, 50)] public int hBorderLeft = 15;
+        [Range(-50, 50)] public int hBorderRight = -15;
+
+        Vector2 uiPos;
+        Vector3 cursorPos;
+        Vector3 contentPos = new Vector3(0, 0, 0);
+        Vector3 contextVelocity = Vector3.zero;
+
+        RectTransform contextRect;
+        RectTransform contentRect;
+
+        [HideInInspector] public bool isOn;
+
+        public enum CameraSource { Main, Custom }
+        public enum SubMenuBehaviour { Hover, Click }
+        public enum CursorBoundHorizontal { Left, Right }
+        public enum CursorBoundVertical { Bottom, Top }
+
+        void Awake()
+        {
+            if (mainCanvas == null) { mainCanvas = gameObject.GetComponentInParent<Canvas>(); }
+            if (contextAnimator == null) { contextAnimator = gameObject.GetComponent<Animator>(); }
+            if (cameraSource == CameraSource.Main) { targetCamera = Camera.main; }
+
+            contextRect = gameObject.GetComponent<RectTransform>();
+            contentRect = contextContent.GetComponent<RectTransform>();
+            contentPos = new Vector3(vBorderTop, hBorderLeft, 0);
+            gameObject.transform.SetAsLastSibling();
+#if UNITY_2022_1_OR_NEWER
+            subMenuBehaviour = SubMenuBehaviour.Click;
+#endif
+        }
+
+        public void CheckForBound()
+        {
+            if (uiPos.x <= -100) 
+            {
+                horizontalBound = CursorBoundHorizontal.Left;
+                contentPos = new Vector3(hBorderLeft, contentPos.y, 0); contentRect.pivot = new Vector2(0f, contentRect.pivot.y); 
+            }
+
+            else if (uiPos.x >= 100)
+            {
+                horizontalBound = CursorBoundHorizontal.Right;
+                contentPos = new Vector3(hBorderRight, contentPos.y, 0); contentRect.pivot = new Vector2(1f, contentRect.pivot.y);
+            }
+
+            if (uiPos.y <= -75)
+            {
+                verticalBound = CursorBoundVertical.Bottom;
+                contentPos = new Vector3(contentPos.x, vBorderBottom, 0); contentRect.pivot = new Vector2(contentRect.pivot.x, 0f);
+            }
+
+            else if (uiPos.y >= 75)
+            {
+                verticalBound = CursorBoundVertical.Top;
+                contentPos = new Vector3(contentPos.x, vBorderTop, 0); contentRect.pivot = new Vector2(contentRect.pivot.x, 1f);
+            }
+        }
+
+        public void SetContextMenuPosition()
+        {
+#if ENABLE_LEGACY_INPUT_MANAGER
+            cursorPos = Input.mousePosition;
+#elif ENABLE_INPUT_SYSTEM
+            cursorPos = Mouse.current.position.ReadValue();
+#endif
+
+            if (mainCanvas.renderMode == RenderMode.ScreenSpaceCamera || mainCanvas.renderMode == RenderMode.WorldSpace)
+            {
+                contextRect.position = targetCamera.ScreenToWorldPoint(cursorPos);
+                contextRect.localPosition = new Vector3(contextRect.localPosition.x, contextRect.localPosition.y, 0);
+                contextContent.transform.localPosition = Vector3.SmoothDamp(contextContent.transform.localPosition, contentPos, ref contextVelocity, 0);
+            }
+
+            else if (mainCanvas.renderMode == RenderMode.ScreenSpaceOverlay)
+            {
+                contextRect.position = cursorPos;
+                contextContent.transform.position = new Vector3(cursorPos.x + contentPos.x, cursorPos.y + contentPos.y, 0);
+            }
+
+            uiPos = contextRect.anchoredPosition;
+            CheckForBound();
+
+            if (debugMode == true)
+            {
+                PrintDebug();
+            }
+        }
+
+        public void SetFixedPosition()
+        {
+#if ENABLE_LEGACY_INPUT_MANAGER
+            cursorPos = Input.mousePosition;
+#elif ENABLE_INPUT_SYSTEM
+            cursorPos = Mouse.current.position.ReadValue();
+#endif
+            SetContextMenuPosition();
+
+            if (mainCanvas.renderMode == RenderMode.ScreenSpaceCamera || mainCanvas.renderMode == RenderMode.WorldSpace)
+            {
+                contextRect.position = targetCamera.ScreenToWorldPoint(cursorPos);
+                contextRect.localPosition = new Vector3(contextRect.localPosition.x, contextRect.localPosition.y, 0);
+                contextContent.transform.localPosition = Vector3.SmoothDamp(contextContent.transform.localPosition, contentPos, ref contextVelocity, 0);
+            }
+
+            else if (mainCanvas.renderMode == RenderMode.ScreenSpaceOverlay)
+            {
+                contextRect.position = cursorPos;
+                contextContent.transform.position = new Vector3(cursorPos.x + contentPos.x, cursorPos.y + contentPos.y, 0);
+            }
+
+            uiPos = contextRect.anchoredPosition;
+            CheckForBound();
+
+            if (debugMode == true)
+            {
+                PrintDebug();
+            }
+        }
+
+        void ProcessContextRect()
+        {
+            if (mainCanvas.renderMode == RenderMode.ScreenSpaceCamera || mainCanvas.renderMode == RenderMode.WorldSpace)
+            {
+                contextRect.position = targetCamera.ScreenToWorldPoint(cursorPos);
+                contextRect.localPosition = new Vector3(contextRect.localPosition.x, contextRect.localPosition.y, 0);
+                contextContent.transform.localPosition = Vector3.SmoothDamp(contextContent.transform.localPosition, contentPos, ref contextVelocity, 0);
+            }
+
+            else if (mainCanvas.renderMode == RenderMode.ScreenSpaceOverlay)
+            {
+                contextRect.position = cursorPos;
+                contextContent.transform.position = new Vector3(cursorPos.x + contentPos.x, cursorPos.y + contentPos.y, 0);
+            }
+        }
+
+        void PrintDebug()
+        {
+            Debug.Log("<b>[Context Menu]</b> UI Pos: " + uiPos + ", H: " + horizontalBound + ", V: " + verticalBound, this);
+        }
+
+        public void Open() 
+        { 
+            contextAnimator.Play("Menu In"); 
+            isOn = true; 
+        }
+
+        public void Close()
+        { 
+            contextAnimator.Play("Menu Out"); 
+            isOn = false; 
+        }
+
+        public void OpenInFixedPosition()
+        {
+            SetFixedPosition();
+            Open();
+        }
+
+        #region Obsolote
+        public void OpenContextMenu() { Open(); }
+        public void CloseOnClick() { Close(); }   
+        #endregion
+    }
+}