浮力

Assets/Scripts/FloatBobberControllerPro.cs

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+using UnityEngine;
+
+public class FloatBobberControllerPro : MonoBehaviour
+{
+    [Header("Water")]
+    public float waterLevel = 0f;
+
+    [Header("Bobber Physical")]
+    public float bobberVolume = 30f;   // 浮漂最大浮力 (cm³)
+    public float bobberMass = 1f;      // 浮漂自重 (g)
+    public float bobberHeight = 0.25f; // 浮漂长度，用来决定躺漂角度
+
+    [Header("Tackle Weight")]
+    public float sinkerWeight = 2f;
+    public float baitWeight = 0.5f;
+    public float hookWeight = 0.2f;
+
+    [Header("Behaviour")]
+    public float fallSpeed = 8f;
+    public float riseSpeed = 3f;
+    public float angleLaySpeed = 2f;     // 躺漂速度
+    public float uprightSpeed = 2f;      // 立漂速度
+    public float bottomDrag = 1.2f;      // 铅坠触底阻力（越大越难被浮漂拉起）
+
+    [Header("Angles")]
+    public float maxLayAngle = 75f;      // 最大躺漂角度
+    float currentAngle = 0f;
+
+    [Header("Noise")]
+    public float noiseAmp = 0.015f;
+    public float noiseFreq = 1.5f;
+
+    float impulseForce = 0f;
+    float impulseDecay = 4f;
+
+    void Update()
+    {
+        SimulateBobber();
+    }
+
+    void SimulateBobber()
+    {
+        float totalWeight = bobberMass + sinkerWeight + baitWeight + hookWeight;
+        float netBuoyancy = bobberVolume - totalWeight;    // 正 → 上浮；负 → 下拉
+
+        // -----------------------------
+        // ① 计算浮漂底部 Y 的高度
+        // -----------------------------
+        float bobberBottomY = transform.position.y - bobberHeight * 0.5f;
+        float bottomY = waterLevel - 0.02f;  // 水底高度（可替换真实地形）
+
+        bool sinkerOnBottom = (bobberBottomY <= bottomY);
+
+        // -----------------------------
+        // ② 计算 targetY
+        // -----------------------------
+        float targetY;
+
+        if (!sinkerOnBottom)
+        {
+            // 铅坠悬浮 → 浮漂直立
+            if (netBuoyancy > 0)
+            {
+                float rise = Mathf.Clamp01(netBuoyancy / bobberVolume) * 0.1f;
+                targetY = waterLevel + rise;
+            }
+            else
+            {
+                float sink = Mathf.Abs(netBuoyancy) * 0.02f;
+                targetY = waterLevel - sink;
+            }
+        }
+        else
+        {
+            // 铅坠触底 → 浮漂无法再被向下拉
+            if (netBuoyancy > bottomDrag)
+            {
+                // 浮漂浮力足够将其立起来
+                float rise = Mathf.Clamp01((netBuoyancy - bottomDrag) / bobberVolume) * 0.1f;
+                targetY = waterLevel + rise;    // 轻轻立起
+            }
+            else
+            {
+                // 浮漂浮力不足 → 躺漂
+                targetY = waterLevel + 0.01f; // 漂身贴水
+            }
+        }
+
+        // 水波噪声
+        targetY += Mathf.Sin(Time.time * noiseFreq) * noiseAmp;
+
+        // 顿口/顶漂力
+        if (impulseForce != 0f)
+        {
+            targetY += impulseForce * Time.deltaTime;
+            impulseForce = Mathf.Lerp(impulseForce, 0, Time.deltaTime * impulseDecay);
+        }
+
+        // -----------------------------
+        // ③ 上浮 / 下沉差速
+        // -----------------------------
+        float y = transform.position.y;
+        float diff = targetY - y;
+
+        if (diff > 0) // 上浮
+            y += diff * Time.deltaTime * riseSpeed;
+        else
+            y += diff * Time.deltaTime * fallSpeed;
+
+        transform.position = new Vector3(transform.position.x, y, transform.position.z);
+
+        // -----------------------------
+        // ④ 浮漂角度控制
+        // -----------------------------
+        float targetAngle = 0f;
+
+        if (sinkerOnBottom)
+        {
+            // 触底 → 判断是否能立漂
+            if (netBuoyancy > bottomDrag)
+            {
+                targetAngle = 0f; // 立漂
+            }
+            else
+            {
+                // 躺漂
+                targetAngle = maxLayAngle;
+            }
+        }
+        else
+        {
+            // 铅坠在水中 → 漂直立
+            targetAngle = 0f;
+        }
+
+        // 平滑角度
+        currentAngle = Mathf.Lerp(
+            currentAngle,
+            targetAngle,
+            Time.deltaTime * (targetAngle == 0 ? uprightSpeed : angleLaySpeed)
+        );
+
+        transform.rotation = Quaternion.Euler(currentAngle, 0, 0);
+    }
+
+    // ----------------------------------------
+    // 外部控制接口
+    // ----------------------------------------
+
+    public void TriggerDownPulse(float s = 0.8f)
+    {
+        impulseForce -= Mathf.Abs(s);
+    }
+
+    public void TriggerUpPulse(float s = 0.8f)
+    {
+        impulseForce += Mathf.Abs(s);
+    }
+
+    public void AddFishPull(float v)
+    {
+        sinkerWeight += v;
+    }
+
+    public void ReleaseFishPull(float v)
+    {
+        sinkerWeight -= v;
+    }
+}