刚体控制的角色在上坡时移动非常奇怪

Posted 2023-04-12

【中文标题】刚体控制的角色在上坡时移动非常奇怪

【英文标题】：Rigidbody controlled character moves very strangely when going up slopes

【发布时间】：2022-01-13 22:05:28

【问题描述】：

我正在为 Unity 中基于物理的第一人称角色控制器编写代码。移动大部分是平稳的，但是当我上坡时，角色并没有滑下来，而是稍微漂浮在空中，同时缓慢地向下移动，直到它回到地面。这种行为非常奇怪和出乎意料，我真的不知道为什么会这样。

角色是一个空对象，带有一个胶囊和一个球体。脚本在空对象上，刚体在胶囊上，胶囊是空的孩子。 这是脚本：

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

public class PlayerController : MonoBehaviour

    float mouseSensitivity;
    private float cameraXRotation;
    private float cameraYRotation;

    private float movementX;
    private float movementY;

    private Transform playerHeadTransform;
    private Transform playerBodyTransform;

    private Rigidbody playerRigidBody;

    private bool IsJumping;

    // Start is called before the first frame update
    void Start()
    
        Cursor.lockState = CursorLockMode.Locked;

        playerBodyTransform = transform.GetChild(0).gameObject.GetComponent<Transform>();
        playerHeadTransform = transform.GetChild(0).transform.GetChild(0).gameObject.GetComponent<Transform>();
        playerRigidBody = transform.GetChild(0).gameObject.GetComponent<Rigidbody>();

        playerHeadTransform.transform.rotation = Quaternion.Euler(0f, 0f, 0f);

        mouseSensitivity = 750;

        IsJumping = false;
    

    // Update is called once per frame
    void Update()
    
        #region CameraStuff
        float cameraMouseX = Input.GetAxis("Mouse X") * mouseSensitivity * Time.deltaTime;
        float cameraMouseY = Input.GetAxis("Mouse Y") * mouseSensitivity * Time.deltaTime;

        cameraXRotation -= cameraMouseY;
        cameraYRotation += cameraMouseX;

        cameraXRotation = Mathf.Clamp(cameraXRotation, -90f, 60);

        playerHeadTransform.localRotation = Quaternion.Euler(cameraXRotation, 0f, 0f);
        playerBodyTransform.localRotation = Quaternion.Euler(0f, cameraYRotation, 0f);
        #endregion

        //Movement input variables
        movementX = Input.GetAxis("Horizontal") * mouseSensitivity * Time.deltaTime;
        movementY = Input.GetAxis("Vertical") * mouseSensitivity * Time.deltaTime;
    

    void FixedUpdate()
    
        playerRigidBody.velocity = playerBodyTransform.TransformDirection(movementX*2, 0, movementY*2);
    

【问题讨论】：

就像一个非常一般的提示：GetChild(0) 已经返回了一个Transform，所以通过gameObject.GetComponent<Transform>() 是完全多余的;) 通常GetComponent<Transform>() 是多余的，因为每个Component 和@ 987654327@ 已经有一个属性.transform ;)

【参考方案1】：

您的播放器没有摔倒很可能与您的设置有关

void FixedUpdate()

    playerRigidBody.velocity = playerBodyTransform.TransformDirection(movementX*2, 0, movementY*2);

如果涉及重力，您宁愿确保不覆盖 Y 轴并执行例如

var currentVelocity = playerRigidbody.velocity;
var newVelocity = playerBodyTransform.TransformDirection(movementX * 2, 0, movementY * 2);
// keep the velocity on Y but only if it is currently downwards
// so you can still move up on a slope but fall down with gravity
if(currentVelocity.y < 0) newVelocity.y = currentVelocity.y;
playerRigidBody.velocity = newVelocity;