按 space 栏使控制台显示 NaN

Question

我正在制作一个允许付款人移动和跳跃的脚本。使用 WASD 键移动很好，但是当我按下 space 条跳跃时，但控制台显示 NaN 并且游戏中的重力停止工作我已经查看了我的播放器电机脚本和我的输入管理器脚本，但是我找不到任何错误。

播放器电机脚本

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

public class PlayerMotor : MonoBehaviour
{
    private CharacterController controller;
    private Vector3 PlayerVelocity;
    private bool isGrounded;
    public float speed = 5f;
    public float gravity = -9.8f;
    public float jumpHeight = -3f;
    // Start is called before the first frame update
    void Start()
    {
        controller = GetComponent<CharacterController>();
    }

    // Update is called once per frame
    void Update()
    {
        isGrounded = controller.isGrounded;
    }
    public void ProcessMove(Vector2 input)
    {
        Vector3 moveDirection = Vector3.zero;
        moveDirection.x = input.x;
        moveDirection.z = input.y;
        controller.Move(transform.TransformDirection(moveDirection) * speed * Time.deltaTime);
        PlayerVelocity.y += gravity * Time.deltaTime;
        if (isGrounded && PlayerVelocity.y < 0)
            PlayerVelocity.y = -2f;
        controller.Move(PlayerVelocity * Time.deltaTime);
        Debug.Log(PlayerVelocity.y);
    }
    public void Jump()
    {
        if (isGrounded)
        {
            PlayerVelocity.y = Mathf.Sqrt(jumpHeight * -3.0f * gravity);
        }
    }
}

输入管理器脚本

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

public class InputManager : MonoBehaviour
{
    private PlayerInput playerInput;
    private PlayerInput.OnFootActions onFoot;

    private PlayerMotor motor;
    // Start is called before the first frame update
    void Awake()
    {
        playerInput = new PlayerInput();
        onFoot = playerInput.OnFoot;
        motor = GetComponent<PlayerMotor>();
        onFoot.Jump.performed += ctx => motor.Jump();
    }

    // Update is called once per frame
    void FixedUpdate()
    {
        // tell the playermotor to move using the value from our movement action
        motor.ProcessMove(onFoot.Movement.ReadValue<Vector2>());
    }
    private void OnEnable()
    {
        onFoot.Enable();
    }
    private void OnDisable()
    {
        onFoot.Disable();
    }

}

Answer 1

在这一行中，您似乎在尝试求负数的平方根？ PlayerVelocity.y = Mathf.Sqrt(jumpHeight * -3.0f * gravity);
Gravity 和 jumpheight 是负数，乘以 -3.0 结果是负数。
在 Unity 中进行的快速测试显示 Mathf.Sqrt 不会对底片抛出错误，而是 returns NaN.

按 space 栏使控制台显示 NaN

Pressing the space bar makes the console say NaN

unity3d