20240116-【UNITY 学习】增加滑动功能

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替换脚本PlayerMovement_02.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;public class PlayerMovement_03 : MonoBehaviour
{private float moveSpeed; // 玩家移动速度public float walkSpeed = 7; // 行走速度public float sprintSpeed = 10; // 冲刺速度public float slideSpeed = 30; // 滑动速度private float desiredMoveSpeed; // 期望的移动速度private float lastDesiredMoveSpeed; // 上一次的期望移动速度public float speedIncreaseMultiplier = 1.5f; // 速度增加倍数public float slopeIncreaseMultiplier = 2.5f; // 斜坡增加倍数public float groundDrag = 5; // 地面时的阻力public float playerHeight = 2; // 玩家身高public LayerMask whatIsGround; // 地面的LayerMaskprivate bool grounded; // 是否在地面上public float jumpForce = 6; // 跳跃力度public float jumpCooldown = 0.25f; // 跳跃冷却时间public float airMultiplier = 0.4f; // 空中移动速度衰减private bool readyToJump = true; // 是否可以跳跃public float crouchSpeed = 3.5f; // 蹲伏时的移动速度public float crouchYScale = 0.5f; // 蹲伏时的Y轴缩放比例private float startYScale; // 初始Y轴缩放比例public float maxSlopAngle = 40; // 最大坡度角度private RaycastHit slopeHit; // 坡度检测的射线信息private bool exitingSlope = true; // 是否正在离开坡度public KeyCode jumpKey = KeyCode.Space; // 跳跃键public KeyCode sprintKey = KeyCode.LeftShift; // 冲刺键public KeyCode crouchKey = KeyCode.LeftControl; // 下蹲键public Transform orientation; // 玩家朝向的Transformprivate float h; // 水平输入private float v; // 垂直输入private Vector3 moveDirection; // 移动方向private Rigidbody rb; // 玩家刚体public MovementState state; // 当前玩家的移动状态public enum MovementState{walking,    // 行走sprinting,  // 冲刺crouching,  // 蹲伏sliding,    // 滑动air         // 空中}public bool sliding; // 是否正在滑动private void Start(){rb = GetComponent<Rigidbody>();rb.freezeRotation = true; // 防止刚体旋转startYScale = transform.localScale.y;  // 记录初始的Y轴缩放}private void Update(){grounded = Physics.Raycast(transform.position, Vector3.down, playerHeight * 0.5f + 0.2f, whatIsGround);MyInput();SpeedControl();StateHandler();if (grounded)rb.drag = groundDrag;elserb.drag = 0;}private void FixedUpdate(){MovePlayer();}private void MyInput(){// 获取水平和垂直输入h = Input.GetAxisRaw("Horizontal");v = Input.GetAxisRaw("Vertical");// 如果按下跳跃键且准备好跳，并且在地面上if (Input.GetKey(jumpKey) && readyToJump && grounded){readyToJump = false;Jump();Invoke(nameof(ResetJump), jumpCooldown);}if (Input.GetKeyDown(crouchKey)){// 调整玩家缩放以模拟蹲下效果transform.localScale = new Vector3(transform.localScale.x, crouchYScale, transform.localScale.z);rb.AddForce(Vector3.down * 5f, ForceMode.Impulse);}// 如果释放下蹲键if (Input.GetKeyUp(crouchKey)){// 恢复到原始Y轴缩放transform.localScale = new Vector3(transform.localScale.x, startYScale, transform.localScale.z);}}private void MovePlayer(){// 根据朝向计算移动方向moveDirection = orientation.forward * v + orientation.right * h;// 如果在斜坡上并且不是即将离开斜坡if (OnSlope() && !exitingSlope){// 在斜坡上施加力，以便更好地移动rb.AddForce(GetSlopeMoveDirection(moveDirection) * moveSpeed * 20f, ForceMode.Force);// 如果垂直速度为正（上升），则额外施加向下的力，以克服斜坡引起的垂直速度变慢if (rb.velocity.y > 0){rb.AddForce(Vector3.down * 80f, ForceMode.Force);}}else if (grounded) // 如果在地面上{rb.AddForce(moveDirection.normalized * moveSpeed * 10f, ForceMode.Force); // 在地面上施加移动力}else if (!grounded) // 如果在空中{// 在空中施加移动力，乘以空中移动速度衰减系数rb.AddForce(moveDirection.normalized * moveSpeed * 10f * airMultiplier, ForceMode.Force);}// 根据是否在斜坡上决定是否启用重力rb.useGravity = !OnSlope();}private void SpeedControl(){// 如果在斜坡上并且不是即将离开斜坡if (OnSlope() && !exitingSlope){// 如果速度的大小超过了设定的移动速度if (rb.velocity.magnitude > moveSpeed){// 将速度归一化，并乘以设定的移动速度，以限制速度在设定范围内rb.velocity = rb.velocity.normalized * moveSpeed;}}// 如果不在斜坡上else{// 获取水平方向的速度Vector3 flatVel = new Vector3(rb.velocity.x, 0f, rb.velocity.z);// 如果水平速度的大小超过了设定的移动速度if (flatVel.magnitude > moveSpeed){// 限制水平速度在设定范围内Vector3 limitedVel = flatVel.normalized * moveSpeed;// 更新刚体的速度，保持垂直速度不变rb.velocity = new Vector3(limitedVel.x, rb.velocity.y, limitedVel.z);}}}private void Jump(){exitingSlope = true;//rb.velocity = new Vector3(rb.velocity.x, 0f, rb.velocity.z);rb.velocity = Vector3.zero;// 添加向上的力以实现跳跃rb.AddForce(transform.up * jumpForce, ForceMode.Impulse);}private void ResetJump(){readyToJump = true;exitingSlope = false;}private void StateHandler(){if (sliding){state = MovementState.sliding;  // 设置当前状态为滑动状态if (OnSlope() && rb.velocity.y < 0.1f){desiredMoveSpeed = slideSpeed;  // 如果在斜坡上并且垂直速度小于0.1，则设置期望移动速度为滑动速度}else{desiredMoveSpeed = sprintSpeed;  // 否则，设置期望移动速度为冲刺速度}}// 如果按住蹲伏键else if (Input.GetKey(crouchKey)){// 设置当前状态为蹲伏状态state = MovementState.crouching;// 设置移动速度为蹲伏速度desiredMoveSpeed = crouchSpeed;}// 如果在地面上并且按住冲刺键else if (grounded && Input.GetKey(sprintKey)){// 设置当前状态为冲刺状态state = MovementState.sprinting;// 设置移动速度为冲刺速度desiredMoveSpeed = sprintSpeed;}// 如果在地面上但没有按住冲刺键else if (grounded){// 设置当前状态为行走状态state = MovementState.walking;// 设置移动速度为行走速度desiredMoveSpeed = walkSpeed;}// 如果不在地面上else{// 设置当前状态为空中状态state = MovementState.air;}if (Mathf.Abs(desiredMoveSpeed - lastDesiredMoveSpeed) > 4f && moveSpeed != 0){StopAllCoroutines();  // 停止所有协程StartCoroutine(SmoothlyLerpMoveSpeed());  // 启动平滑插值移动速度的协程}else{moveSpeed = desiredMoveSpeed;  // 否则，直接将移动速度设置为期望移动速度}lastDesiredMoveSpeed = desiredMoveSpeed;  // 更新上一次的期望移动速度}public bool OnSlope(){// 使用射线检测当前位置向下，获取击中信息存储在slopeHit中if (Physics.Raycast(transform.position, Vector3.down, out slopeHit, playerHeight * 0.5f + 0.3f)){// 计算斜坡的角度float angle = Vector3.Angle(Vector3.up, slopeHit.normal);// 如果角度小于最大允许斜坡角度且不等于0，表示在斜坡上return angle < maxSlopAngle && angle != 0;}// 如果没有击中信息，或者角度不符合条件，表示不在斜坡上return false;}public Vector3 GetSlopeMoveDirection(Vector3 direction){// 使用Vector3.ProjectOnPlane将移动方向投影到斜坡法线上，然后进行归一化return Vector3.ProjectOnPlane(direction, slopeHit.normal).normalized;}private IEnumerator SmoothlyLerpMoveSpeed(){float time = 0;  // 记录经过的时间float difference = Mathf.Abs(desiredMoveSpeed - moveSpeed);  // 计算期望移动速度与当前移动速度的差值float startValue = moveSpeed;  // 记录开始时的移动速度while (time < difference){moveSpeed = Mathf.Lerp(startValue, desiredMoveSpeed, time / difference);  // 使用插值平滑地改变移动速度if (OnSlope()){float slopeAngle = Vector3.Angle(Vector3.up, slopeHit.normal);  // 计算当前坡度的角度float slopeAngleIncrease = 1 + (slopeAngle / 90f);  // 根据坡度角度增加速度// 根据时间、速度增加倍数、坡度增加倍数进行平滑插值time += Time.deltaTime * speedIncreaseMultiplier * slopeIncreaseMultiplier * slopeAngleIncrease;}else{// 在平地上，只考虑时间和速度增加倍数time += Time.deltaTime * speedIncreaseMultiplier;}yield return null;  // 等待下一帧}moveSpeed = desiredMoveSpeed;  // 最终将移动速度设置为期望移动速度}
}

新增脚本Sliding.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;public class Sliding : MonoBehaviour
{public Transform orientation;  // 玩家方向的Transformpublic Transform playerObj;   // 玩家对象的Transform，用于在滑动期间调整缩放private Rigidbody rb;          // 玩家的刚体组件private PlayerMovement_03 pm_03; // PlayerMovement_03脚本的引用public float maxSlideTime = 0.75f; // 滑动的最大持续时间public float slideForce = 200;     // 滑动期间施加的力private float slideTimer;          // 用于跟踪滑动持续时间的计时器public float slideYScale = 0.5f;   // 滑动期间玩家的Y轴缩放private float startYScale;          // 玩家的初始Y轴缩放public KeyCode slideKey = KeyCode.F; // 启动滑动的按键private float h;  // 水平输入private float v;  // 垂直输入private void Start(){rb = GetComponent<Rigidbody>();pm_03 = GetComponent<PlayerMovement_03>();startYScale = playerObj.localScale.y;}private void Update(){h = Input.GetAxisRaw("Horizontal");v = Input.GetAxisRaw("Vertical");// 检查是否按下滑动键且存在水平或垂直输入if (Input.GetKeyDown(slideKey) && (h != 0 || v != 0)){StartSlide(); // 启动滑动}// 检查是否释放了滑动键且玩家当前正在滑动if (Input.GetKeyUp(slideKey) && pm_03.sliding){StopSlide(); // 停止滑动}}private void FixedUpdate(){// 检查玩家当前是否在滑动if (pm_03.sliding){SlidingMovement(); // 处理滑动运动}}private void StartSlide(){pm_03.sliding = true; // 在PlayerMovement_03脚本中设置滑动标志// 调整玩家的缩放以创建蹲伏效果playerObj.localScale = new Vector3(playerObj.localScale.x, slideYScale, playerObj.localScale.z);// 应用向下的力以模拟蹲伏rb.AddForce(Vector3.down * 5f, ForceMode.Impulse);slideTimer = maxSlideTime; // 初始化滑动计时器}private void SlidingMovement(){Vector3 inputDirection = orientation.forward * v + orientation.right * h; // 计算输入方向// 检查玩家是否不在斜坡上或向上移动if (!pm_03.OnSlope() || rb.velocity.y > -0.1f){// 在滑动期间在输入方向上施加力rb.AddForce(inputDirection.normalized * slideForce, ForceMode.Force);slideTimer -= Time.deltaTime; // 减少滑动计时器}else{// 在斜坡上滑动时根据斜坡的方向调整力rb.AddForce(pm_03.GetSlopeMoveDirection(inputDirection) * slideForce, ForceMode.Force);}// 检查滑动持续时间是否已过期if (slideTimer <= 0){StopSlide(); // 停止滑动}}private void StopSlide(){pm_03.sliding = false; // 在PlayerMovement_03脚本中重置滑动标志// 将玩家的缩放恢复到初始大小playerObj.localScale = new Vector3(playerObj.localScale.x, startYScale, playerObj.localScale.z);}
}

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