Unity 3D - 脉冲反应行为上的意外轴捕捉和未知力

问：

UNITY 版本 2022.3.11f1 3D URP项目

我正在开发一个简单的播放器控制器脚本，但很难确定速度以意外方式运行的原因。

两个问题：

1 - 当我在向前移动时旋转玩家刚体时 - 速度/方向会捕捉到世界的 x 轴。

黄线是速度 红线是作用力（根据键 （W） 输入和鼠标输入的方向推动）

视频演示 ： https://clipchamp.com/watch/kpePTVpR73s

问题 - 为什么速度会捕捉到这样的世界轴，我该如何开始解决？

2 - 当我按下空格键在 y 方向上施加脉冲力时，在 z 世界轴方向上施加了一个力，该力正在推动刚体，我花了很多时间注释掉其他作用力并查看 UI 以查找可能起作用的力。

再

黄线是速度 红线是作用力（根据键 （W） 输入和鼠标输入的方向推动）

视频演示 ： https://clipchamp.com/watch/phAYs1v4ULU

问题 - 为什么当脉冲设置为世界 y 时，速度会立即与 z 方向成一定角度，为什么在弧路径的末端会发生偏转，就好像刚体在撞到一堵看不见的墙上一样？

资产结构

照相机 父级 - CameraHolder - MoveCamera 脚本

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class MoveCamera : MonoBehaviour
{
    public Transform cameraPosition;
 
    // Update is called once per frame
    void Update()
    {
        transform.position = cameraPosition.position;
    }
}

儿童 - PlayerCam（主摄像头） - PlayerCam脚本

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
 
public class PlayerCam : MonoBehaviour
{
 
    public float sensX;
    public float sensY;
 
    public Transform orientation;
 
    float xRotation;
    float yRotation;
 
 
    // Start is called before the first frame update
    void Start()
    {
        Cursor.lockState = CursorLockMode.Locked;
        Cursor.visible = false;
    }
 
    // Update is called once per frame
    void Update()
    {
        // Get Mouse Input
 
        float mouseX = Input.GetAxisRaw("Mouse X") * Time.deltaTime * sensX;
        float mouseY = Input.GetAxisRaw("Mouse Y") * Time.deltaTime * sensY;
 
        yRotation += mouseX;
        xRotation -= mouseY;
 
        xRotation = Mathf.Clamp(xRotation, -90f, 90f);
 
 
 
        transform.rotation = Quaternion.Euler(xRotation, yRotation, 0);
        orientation.rotation = Quaternion.Euler(0, yRotation, 0);
    }
}

选手 父级 - 玩家 - 刚体 - 玩家移动脚本

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
 
public class PlayerMovement : MonoBehaviour
{
    [Header("Movement")]
    public float moveSpeed;
 
    float horizontalInput;
    float verticalInput;
 
    Vector3 moveDirection;
 
    Rigidbody rb;
 
    public float groundDrag;
 
    public float jumpForce;
    public float jumpCooldown;
    public float airMultiplier;
    bool readyToJump = true;
 
    [Header("Keybinds")]
    public KeyCode jumpKey = KeyCode.Space;
 
    [Header("Ground Check")]
    public float playerHeight;
    public LayerMask whatIsGround;
    public Transform orientation;
    bool grounded;
 
    // Start is called before the first frame update
    void Start()
    {
        rb = GetComponent<Rigidbody>();
        rb.freezeRotation = true;
    }
 
    // Update is called once per frame
    void Update()
    {
         
        Debug.DrawRay(rb.position, rb.velocity, Color.yellow);
        Debug.DrawRay(rb.position, rb.GetAccumulatedForce(), Color.red);
 
        // Ground Check
        grounded = Physics.Raycast(transform.position, Vector3.down, playerHeight * 0.5f + 0.2f, whatIsGround);
 
        MyInput();
        SpeedControl();
 
        // Handle drag
        if (grounded)
            rb.drag = groundDrag;
        else
            rb.drag = 0;
    }
 
    private void FixedUpdate()
    {
        MovePlayer();
    }
    private void MyInput()
    {
        horizontalInput = Input.GetAxis("Horizontal");
        verticalInput = Input.GetAxis("Vertical");
 
        if (Input.GetKey(jumpKey) && readyToJump && grounded)
        {
            readyToJump = false;
 
            Jump();
 
            Invoke(nameof(ResetJump), jumpCooldown);
        }
    }
 
    private void MovePlayer()
    {
        // Calculate movement direction
        moveDirection = orientation.forward * verticalInput + orientation.right * horizontalInput;
        Debug.Log("Orientation --- " + orientation.position);
        Debug.Log("Orientation --- " + orientation.forward);
        Debug.DrawLine(rb.position, moveDirection, Color.green);
 
        // On Ground
        if (grounded)
            rb.AddForce(moveDirection.normalized * moveSpeed * 10f, ForceMode.Force);
        else if (!grounded)
            rb.AddForce(moveDirection.normalized * moveSpeed * 10f * airMultiplier, ForceMode.Force);
    }
   
    private void SpeedControl()
    {
        Vector3 flatVelocity = new Vector3(rb.velocity.x, 0f, rb.velocity.y);
 
        // Limit velocity if needed
        if(flatVelocity.magnitude > moveSpeed)
        {
            Vector3 limitedVelocity = flatVelocity.normalized * moveSpeed;
            rb.velocity = new Vector3(limitedVelocity.x, rb.velocity.y, limitedVelocity.z);
        }
    }
 
    private void Jump()
    {
        // Reset Y Velocity
        rb.velocity = new Vector3(rb.velocity.x, 0f, rb.velocity.z);
        rb.AddForce(transform.up * jumpForce, ForceMode.Impulse);
    }
 
    private void ResetJump()
    {
        readyToJump = true;
    }
}

儿童 - PlayerObj - 胶囊对撞机

子 - 方向 - 只需变换方向

儿童 - CameraPos - 只需变换位置

我尝试了各种代码注释、日志记录和 UI 配置，以尝试推理力如何作用在刚体上。