256 lines
7.8 KiB
C#
256 lines
7.8 KiB
C#
using System.Collections;
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using System.Collections.Generic;
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using DarkTonic.MasterAudio;
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using UnityEngine;
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public class Bow : Launcher
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{
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public Transform bowString;
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public GameObject arrowPre;
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private Arrow _nowArrow;
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[SoundGroup] public string arrowShoot;
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[Header("箭矢类型管理")]
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public BulletType currentArrowType = BulletType.Arrow;
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private float specialArrowTimeRemaining = 0f;
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[Header("箭矢预制体")]
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public GameObject normalArrowPrefab;
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public GameObject fireArrowPrefab;
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[Header("弓弦力度参数")]
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public float minForce = 20f;//最小力度
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public float maxForce = 45f;//最大力度
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public float forceMultiplier = 1.2f;//力度倍增系数
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public float maxPullDistance = 0.5f;//弓弦可拉最大距离
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public float forceCurveExponent = 1.5f;//力度曲线指数
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private float currentDrawStrength = 0f;//当前力度（0-1）
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[Header("弓弦视觉反馈")]
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public LineRenderer bowStringRenderer;//弓弦的LineRenderer
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public Transform stringTopPoint;//弓弦顶端点
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public Transform stringBottomPoint;//弓弦末端点
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public Transform stringMiddlePoint;//弓弦中间点（手拉动弓弦的位置）
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private Vector3 middlePointPos;//初始弓弦初始点
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public void Start()
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{
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type = GunType.Bow;
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GunInfo gunInfo = GameManager.Ins.GunInfos[GunType.Bow][1];
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shootRate = gunInfo.ShootRate;
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recoil = maxForce;//使用最大力度作为基础后坐力
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//初始化弓弦位置
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if (bowStringRenderer != null && stringTopPoint != null && stringBottomPoint != null)
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{
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//设置LineRenderer位置
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bowStringRenderer.positionCount = 3;
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bowStringRenderer.SetPosition(0, stringTopPoint.position);
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bowStringRenderer.SetPosition(1, stringMiddlePoint.position);
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bowStringRenderer.SetPosition(2, stringBottomPoint.position);
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//保存中间点初始位置
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middlePointPos = stringMiddlePoint.localPosition;
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}
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}
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public void Update()
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{
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UpdateArrowStatus();
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UpdateBowStringVisual();
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}
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//更新弓弦视觉效果
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private void UpdateBowStringVisual()
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{
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if (bowStringRenderer != null && stringTopPoint != null && stringBottomPoint != null && stringMiddlePoint != null)
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{
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//更新LineRenderer
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bowStringRenderer.SetPosition(0, stringTopPoint.position);
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bowStringRenderer.SetPosition(1, stringMiddlePoint.position);
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bowStringRenderer.SetPosition(2, stringBottomPoint.position);
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}
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}
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//更新箭矢状态
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private void UpdateArrowStatus()
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{
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if (specialArrowTimeRemaining > 0)
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{
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specialArrowTimeRemaining -= Time.deltaTime;
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if (specialArrowTimeRemaining <= 0)
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{
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currentArrowType = BulletType.Arrow;
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//TODO:UI特殊箭矢已失效（或不做）
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}
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}
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}
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//激活特殊箭矢
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//public void ActivateSpecialArrow(ArrowPickup.ArrowType arrowType, float duration)
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//{
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// switch (arrowType)
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// {
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// case ArrowPickup.ArrowType.Fire:
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// currentArrowType = BulletType.FireArrow;
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// specialArrowTimeRemaining = duration;
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// //TODO:UI获得火焰箭（或不做）
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// break;
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// //TODO：添加其他特殊箭矢类型
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// }
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//}
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Vector3 ProjectPointOnPlane(Vector3 point, Vector3 planeOrigin, Vector3 planeNormal)
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{
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// 单位化法向量
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planeNormal.Normalize();
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// 计算点到平面上任意一点的向量
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Vector3 vectorToPlane = point - planeOrigin;
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// 计算投影距离
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float distance = Vector3.Dot(vectorToPlane, planeNormal);
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// 得到垂足（即点在平面上的投影）
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Vector3 projection = point - distance * planeNormal;
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return projection;
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}
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/// <summary>
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/// 拉弓弦
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/// </summary>
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public void Pull(Transform point)
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{
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// 定义投影平面的原点和法向量
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Vector3 planeOrigin = bowString.position; // 平面经过的点
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Vector3 planeNormal = bowString.right; // 平面的法向量
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// 调用投影函数
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Vector3 projectedPoint = ProjectPointOnPlane(point.position, planeOrigin, planeNormal);
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Vector3 localPos = bowString.InverseTransformPoint(projectedPoint);
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//限制拉弓距离
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float pullDistance = Mathf.Clamp(localPos.z, -maxPullDistance, 0);
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bulletPoint.localPosition = new Vector3(0, 0, localPos.z);
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//更新中间点位置（弓弦弯曲效果）
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if (stringMiddlePoint != null)
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{
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Vector3 midPos = middlePointPos;
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midPos.z = pullDistance;
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stringMiddlePoint.localPosition = midPos;
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}
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// 计算拉弓力度 (0-1)
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currentDrawStrength = Mathf.Clamp01(Mathf.Abs(pullDistance) / maxPullDistance);
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// 应用非线性曲线（初始松，后段紧）
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float curvedStrength = Mathf.Pow(currentDrawStrength, 1.8f);
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}
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/// <summary>
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/// 弓弦复位
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/// </summary>
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public void Reset()
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{
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bulletPoint.localPosition = Vector3.zero;
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currentDrawStrength = 0f;
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//重置中间点位置
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if (stringMiddlePoint != null)
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{
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stringMiddlePoint.localPosition = middlePointPos;
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}
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}
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/// <summary>
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/// 创建箭矢
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/// </summary>
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public void CreateArrowInHand()
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{
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//如果已有箭矢，先销毁
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if (_nowArrow != null)
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{
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Destroy(_nowArrow.gameObject);
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}
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//根据当前箭矢类型选择预制体
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GameObject arrowPrefab = GetCurrentArrowPrefab();
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GameObject arrowObj = Instantiate(arrowPrefab, bulletPoint);
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_nowArrow = arrowObj.GetComponent<Arrow>();
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//初始禁用物理，知道射出
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if (_nowArrow.TryGetComponent<Rigidbody>(out var rb))
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{
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rb.isKinematic = true;
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}
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}
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//获取当前箭矢预制体
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private GameObject GetCurrentArrowPrefab()
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{
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switch (currentArrowType)
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{
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case BulletType.FireArrow:
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return fireArrowPrefab;
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default:
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return normalArrowPrefab;
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}
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}
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/// <summary>
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/// 射出箭矢
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/// </summary>
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public void ShootArrow()
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{
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//Shoot();
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//Reset();
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if (_nowArrow != null)
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{
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//检查游戏状态
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if (GameManager.Ins.gameState == GameState.Introduce)
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{
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GameManager.Ins.GameStart();
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}
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MasterAudio.PlaySound(arrowShoot);
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// 根据拉弓力度计算实际力度（应用非线性曲线）
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float curvedStrength = Mathf.Pow(currentDrawStrength, 1.8f);
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float actualForce = Mathf.Lerp(minForce, maxForce, curvedStrength) * forceMultiplier;
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//发射手上已有的箭矢
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_nowArrow.transform.SetParent(null);
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//应用物理效果
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if (_nowArrow.TryGetComponent<Rigidbody>(out var rb))
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{
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rb.isKinematic = false;//确保物理启用
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rb.velocity = Vector3.zero;//重置速度
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rb.angularVelocity= Vector3.zero;//重置角速度
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//设置初始速度
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rb.AddForce(bulletPoint.forward * actualForce, ForceMode.VelocityChange);
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}
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//设置箭矢类型
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_nowArrow.type = currentArrowType;
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//调用箭矢初始化（传递力度值）
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_nowArrow.OnSpawn(bulletPoint.forward, actualForce);
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//清楚引用
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_nowArrow = null;
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Reset();
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}
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}
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}
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