ROPE

Assets/Scripts/Common/FPSShower.cs

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+using System;
+using TMPro;
+using UnityEngine;
+
+namespace NBF
+{
+    public class FPSShower : MonoBehaviour
+    {
+        
+        public TextMeshProUGUI TextFPS;
+        
+        public float updateInterval = 0.2f; // 更新间隔（秒）
+
+        private float accum = 0;
+        private int frames = 0;
+        private float timeleft;
+
+        private void Awake()
+        {
+            Application.targetFrameRate = 300; // 设为极高值
+        }
+
+
+        public int FPS;
+
+        void Update()
+        {
+            timeleft -= Time.deltaTime;
+            accum += Time.timeScale / Time.deltaTime;
+            frames++;
+
+            if (timeleft <= 0.0f)
+            {
+                FPS = (int)(accum / frames);
+
+                timeleft = updateInterval;
+                accum = 0.0f;
+                frames = 0;
+                TextFPS.text = FPS.ToString();
+            }
+            
+        }
+    }
+}

Assets/Scripts/Common/FPSShower.cs.meta

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+fileFormatVersion: 2
+guid: bf0d58315f7747cd8e9139b6b7a0345b
+timeCreated: 1768745219

Assets/Scripts/Common/FishingRope.cs

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+using UnityEngine;
+
+namespace NBF
+{
+    [RequireComponent(typeof(LineRenderer))]
+    public class FishingRope : MonoBehaviour
+    {
+        [Header("Demo Parameters")] [SerializeField, Min(0)]
+        float mouseOffset = 10f;
+
+        [Header("Verlet Parameters")] [SerializeField]
+        float nodeDistance = 0.35f;
+
+        [SerializeField] float nodeColliderRadius = 0.2f;
+        [SerializeField] float gravityStrength = 2;
+        [SerializeField, Range(1, 500)] int totalNodes = 100;
+        [SerializeField, Range(0, 1)] float velocityDampen = 0.95f;
+        [SerializeField, Range(0, 0.99f)] float stiffness = 0.8f;
+        [SerializeField, Range(1, 10)] int iterateCollisionsEvery = 1;
+        [SerializeField, Range(1, 200)] int iterations = 10;
+        [SerializeField] int colliderBufferSize = 1;
+
+        [Header("Line Renderer")] [SerializeField]
+        float ropeWidth = 0.02f;
+
+        // 私有变量
+        Camera cam;
+        Vector3 gravity;
+        Vector3 startLock;
+        Vector3 endLock;
+        bool isStartLocked = false;
+        bool isEndLocked = false;
+
+        // 数组和缓存
+        Vector3[] currentNodePositions;
+        Vector3[] previousNodePositions;
+        Collider[] colliderHitBuffer;
+        LineRenderer lineRenderer;
+        GameObject nodeTester;
+        SphereCollider nodeCollider;
+
+        void Awake()
+        {
+            // 初始化数组
+            currentNodePositions = new Vector3[totalNodes];
+            previousNodePositions = new Vector3[totalNodes];
+            colliderHitBuffer = new Collider[colliderBufferSize];
+
+            // 获取组件引用
+            lineRenderer = GetComponent<LineRenderer>();
+            cam = Camera.main;
+            gravity = new Vector3(0, -gravityStrength, 0);
+
+            // 初始化节点测试器
+            nodeTester = new GameObject("Node Tester");
+            nodeTester.layer = 8;
+            nodeCollider = nodeTester.AddComponent<SphereCollider>();
+            nodeCollider.radius = nodeColliderRadius;
+
+            // 初始化节点位置
+            Vector3 startPos = transform.position;
+            for (int i = 0; i < totalNodes; i++)
+            {
+                currentNodePositions[i] = startPos;
+                previousNodePositions[i] = startPos;
+                startPos.y -= nodeDistance;
+            }
+
+            // 设置线渲染器
+            lineRenderer.startWidth = ropeWidth;
+            lineRenderer.endWidth = ropeWidth;
+        }
+
+        void Update()
+        {
+            // 处理鼠标输入
+            if (Input.GetMouseButtonDown(0))
+            {
+                if (!isStartLocked)
+                {
+                    isStartLocked = true;
+                    startLock = GetMouseWorldPosition();
+                }
+                else if (!isEndLocked)
+                {
+                    isEndLocked = true;
+                    endLock = GetMouseWorldPosition();
+                }
+            }
+            else if (!isStartLocked)
+            {
+                startLock = GetMouseWorldPosition();
+            }
+            else if (isStartLocked && !isEndLocked)
+            {
+                endLock = GetMouseWorldPosition();
+            }
+
+            DrawRope();
+        }
+
+        void FixedUpdate()
+        {
+            Simulate();
+
+            for (int i = 0; i < iterations; i++)
+            {
+                ApplyConstraint();
+
+                // 减少碰撞检测频率
+                if (i % (iterateCollisionsEvery + 1) == 0)
+                {
+                    AdjustCollisions();
+                }
+            }
+        }
+
+        Vector3 GetMouseWorldPosition()
+        {
+            return cam.ScreenToWorldPoint(Input.mousePosition + new Vector3(0, 0, mouseOffset));
+        }
+
+        void Simulate()
+        {
+            float fixedDt = Time.fixedDeltaTime;
+            for (int i = 0; i < totalNodes; i++)
+            {
+                // 计算并应用速度
+                Vector3 velocity = (currentNodePositions[i] - previousNodePositions[i]) * velocityDampen;
+                previousNodePositions[i] = currentNodePositions[i];
+                currentNodePositions[i] += velocity + gravity * fixedDt;
+            }
+        }
+
+        void ApplyConstraint()
+        {
+            // 锁定端点
+            currentNodePositions[0] = startLock;
+            if (isStartLocked && isEndLocked)
+            {
+                currentNodePositions[totalNodes - 1] = endLock;
+            }
+
+            // 预计算所有常用值
+            float halfStiffness = 0.5f * stiffness;
+            float sqrNodeDistance = nodeDistance * nodeDistance;
+            int nodeCountMinusOne = totalNodes - 1;
+
+            for (int i = 0; i < nodeCountMinusOne; i++)
+            {
+                Vector3 node1 = currentNodePositions[i];
+                Vector3 node2 = currentNodePositions[i + 1];
+                Vector3 diff = node1 - node2;
+
+                float sqrDistance = diff.x * diff.x + diff.y * diff.y + diff.z * diff.z;
+
+                // 只有当距离差异超过一定阈值时才调整
+                if (Mathf.Abs(sqrDistance - sqrNodeDistance) > 0.001f)
+                {
+                    float distance = Mathf.Sqrt(sqrDistance);
+                    float difference = nodeDistance - distance;
+                    Vector3 direction = diff / distance; // 比 normalized 更快
+
+                    Vector3 adjustment = direction * (difference * halfStiffness);
+
+                    currentNodePositions[i] += adjustment;
+                    currentNodePositions[i + 1] -= adjustment;
+                }
+            }
+        }
+
+        void AdjustCollisions()
+        {
+            for (int i = 1; i < totalNodes; i += 2) // 跳过更多节点减少计算
+            {
+                int hits = Physics.OverlapSphereNonAlloc(
+                    currentNodePositions[i],
+                    nodeColliderRadius,
+                    colliderHitBuffer,
+                    ~(1 << 8)); // 忽略特定层
+
+                for (int n = 0; n < hits; n++)
+                {
+                    if (Physics.ComputePenetration(
+                            nodeCollider,
+                            currentNodePositions[i],
+                            Quaternion.identity,
+                            colliderHitBuffer[n],
+                            colliderHitBuffer[n].transform.position,
+                            colliderHitBuffer[n].transform.rotation,
+                            out Vector3 direction,
+                            out float distance))
+                    {
+                        currentNodePositions[i] += direction * distance;
+                    }
+                }
+            }
+        }
+
+        void DrawRope()
+        {
+            // 直接使用currentNodePositions数组避免额外拷贝
+            lineRenderer.positionCount = totalNodes;
+            lineRenderer.SetPositions(currentNodePositions);
+        }
+
+        void OnDestroy()
+        {
+            if (nodeTester != null)
+            {
+                Destroy(nodeTester);
+            }
+        }
+    }
+}

Assets/Scripts/Common/FishingRope.cs.meta

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+fileFormatVersion: 2
+guid: c499dd9219664cd3a407bd4df1825ca7
+timeCreated: 1768743058