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Assets/Scripts/Fishing/New/View/FishingLine/FishingLineSolver.cs

@@ -17,15 +17,87 @@ namespace NBF
     {
         [SerializeField] public LineType LineType;
 
-        
 
         [Header("References")] [SerializeField]
         private Transform anchorTransform;
-        
+
         [SerializeField] private FishingLineNode[] logicalNodes = Array.Empty<FishingLineNode>();
 
         public JointPinchController PinchController;
 
+        private void FixedUpdate()
+        {
+            UpdateAnchorNode();
+            CalculateLineRealLength(Time.fixedDeltaTime);
+        }
+
+        #region Start Node
+
+        private void ConfigureStartNode()
+        {
+            if (logicalNodes == null || logicalNodes.Length == 0 || logicalNodes[0] == null)
+            {
+                return;
+            }
+
+            var startNode = logicalNodes[0];
+            startNode.Type = FishingLineNode.NodeType.Start;
+
+            if (startNode.Body != null)
+            {
+                startNode.Body.isKinematic = true;
+                startNode.Body.interpolation = RigidbodyInterpolation.Interpolate;
+                startNode.Body.collisionDetectionMode = CollisionDetectionMode.ContinuousDynamic;
+            }
+
+            UpdateAnchorNode();
+        }
+
+        private void UpdateAnchorNode()
+        {
+            if (anchorTransform == null || logicalNodes == null || logicalNodes.Length == 0 || logicalNodes[0] == null)
+            {
+                return;
+            }
+
+            var startNode = logicalNodes[0];
+            startNode.transform.SetPositionAndRotation(anchorTransform.position, anchorTransform.rotation);
+
+            if (startNode.Body != null)
+            {
+                if (!startNode.Body.isKinematic)
+                {
+                    startNode.Body.linearVelocity = Vector3.zero;
+                    startNode.Body.angularVelocity = Vector3.zero;
+                }
+            }
+        }
+
+        #endregion
+
+        #region Line
+
+        /// <summary>
+        /// 当前逻辑链总长度超出配置总长度的部分，小于等于零时记为 0。
+        /// </summary>
+        public float CurrentStretchLength { get; private set; }
+
+        /// <summary>
+        /// 设置指定逻辑段的配置长度。
+        /// segmentIndex 为 0 时表示第一段；大于 0 时表示对应逻辑节点到下一个逻辑节点的线长。
+        /// </summary>
+        public void SetLenght(float length, int segmentIndex = 0)
+        {
+            ConfigureStartNode();
+            CalculateLineRealLength(0f);
+        }
+
+        private void CalculateLineRealLength(float deltaTime)
+        {
+        }
+
+        #endregion
+
         #region LineNode
 
         /// <summary>
@@ -34,6 +106,23 @@ namespace NBF
         /// </summary>
         public IReadOnlyList<FishingLineNode> LogicalNodes => logicalNodes;
 
+        /// <summary>
+        /// 根据类型获取逻辑节点类型
+        /// </summary>
+        /// <param name="nodeType"></param>
+        /// <returns></returns>
+        public FishingLineNode GetLogicalNode(FishingLineNode.NodeType nodeType)
+        {
+            foreach (var fishingLineNode in logicalNodes)
+            {
+                if (fishingLineNode.Type == nodeType)
+                {
+                    return fishingLineNode;
+                }
+            }
+
+            return null;
+        }
 
         /// <summary>
         /// 获取指定顺序索引的逻辑节点。
@@ -105,6 +194,62 @@ namespace NBF
 
         #endregion
 
+        #region 极限判定
+
+        [Header("Limit Detection")]
+        [Min(0f)]
+        // 极限判定的长度容差，允许链路在总长或单段长度上存在少量误差。
+        [SerializeField]
+        private float lengthLimitTolerance = 0.01f;
+
+        [Min(0f)]
+        // 达到极限后，只有当前超长值大于该阈值时，才开始进入断线候选计时。
+        [SerializeField]
+        private float breakStretchThreshold = 0.05f;
+
+        /// <summary>
+        /// 当鱼线达到断线条件时发出的一次性消息。
+        /// 外部可订阅该事件，在回调中执行切线、播放表现或状态切换。
+        /// </summary>
+        public event Action<FishingLineSolver> OnLineBreakRequested;
+
+        /// <summary>
+        /// 当前断线候选状态的累计时间。
+        /// 只有在处于极限状态，且 CurrentStretchLength 大于断线阈值时才会累加；否则重置为 0。
+        /// </summary>
+        public float LimitStateTime { get; private set; }
+
+        /// <summary>
+        /// 当前拉力极限百分比。
+        /// 当超长值小于等于 lengthLimitTolerance 时为 0；
+        /// 当超长值大于等于 breakStretchThreshold 时为 100；
+        /// 中间区间按线性比例映射，供 UI 显示使用。
+        /// </summary>
+        public float CurrentBreakStretchPercent => EvaluateBreakStretchPercent(CurrentStretchLength);
+
+
+        private float EvaluateBreakStretchPercent(float stretchLength)
+        {
+            if (stretchLength <= lengthLimitTolerance)
+            {
+                return 0f;
+            }
+
+            if (stretchLength >= breakStretchThreshold)
+            {
+                return 100f;
+            }
+
+            if (breakStretchThreshold <= lengthLimitTolerance)
+            {
+                return 100f;
+            }
+
+            return Mathf.InverseLerp(lengthLimitTolerance, breakStretchThreshold, stretchLength) * 100f;
+        }
+
+        #endregion
+
         protected override void OnInit()
         {
             var tipRb = Rod.Asset.LineConnectorRigidbody;