变量更改显示在统一检查器中，但实际上并未发生

Question

我对 c#、统一和编码非常陌生。我正在尝试制作一个可以蹲下、跳跃和冲刺的可控 3d 角色。由于我在标题中所描述的，Sprinting 目前不起作用：玩家的速度在统一检查器中更新，但实际上并没有在游戏中改变。

完整的玩家移动脚本

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

public class PlayerMovement : MonoBehaviour
{


    public CharacterController controller;

    
    public float gravity = -9.807f;

    public Transform groundCheck;

    public float groundDistance = 0.4f;

    public LayerMask groundMask;

    public float jumpHeight = 3f;

    public float crouchHeight = 0.9f;

    public float playerPushPower = 2.0f;

    public float speed = 16f;

    public float sprintSpeed = 1.5f;

    public float crouchSpeed = 0.5f;

    private float baseSpeed = 16f;

    
    bool isGrounded;

    bool isSprinting = false;

    bool isCrouching = false;

    bool isJumping = false;
    
    bool isStanding = true;
    






    Vector3 velocity;







    void OnControllerColliderHit(ControllerColliderHit hit)
    {
        Rigidbody body = hit.collider.attachedRigidbody;


        playerPushPower = speed / 8;

        



        // no rigidbody
        if (body == null || body.isKinematic)
            return;

        // We dont want to push objects below us
        if (hit.moveDirection.y < -0.3f)
            return;

        // Calculate push direction from move direction,
        // we only push objects to the sides never up and down
        Vector3 pushDir = new Vector3(hit.moveDirection.x, 0, hit.moveDirection.z);

        // If you know how fast your character is trying to move,
        // then you can also multiply the push velocity by that.

        


    


        // Apply the push
        body.velocity = pushDir * playerPushPower;
    }
    
    
    

   
    // Update is called once per frame
    void Update()
    {
        isGrounded = Physics.CheckSphere(groundCheck.position, groundDistance, groundMask);


        controller.height = 3.8f;

        



        if(isGrounded && velocity.y < 0)
        { 
            velocity.y = -2f;
        }

        


      

      if(Input.GetKey("left ctrl") && isGrounded) 
      {
        speed = speed * crouchSpeed;
        isCrouching = true;
        isStanding = false;
        

      }
      else 
      {
        speed = 16f;
        isCrouching = false;
        isStanding = true;
    
      }

      
        float x = Input.GetAxis("Horizontal");
        float z = Input.GetAxis("Vertical");

        Vector3 move = transform.right * x + transform.forward * z;

        controller.Move(move * speed * Time.deltaTime);

        if (Input.GetButtonDown("Jump") && isGrounded && isStanding)
        {
            velocity.y = Mathf.Sqrt(jumpHeight * -2f * gravity);
            isJumping = true;
        }

        velocity.y += gravity * Time.deltaTime;

        controller.Move(velocity * Time.deltaTime);




        if(Input.GetKey("left shift") && isGrounded && isStanding) 
      {
        speed = speed * sprintSpeed;
        isSprinting = true;
        
      }
      else 
      {
        speed = 16f;
        isSprinting = false;
      }





        
        
    }
}

Answer 1

查看速度是如何计算并应用于移动角色的：

void Update()
{
    ...
    // 1) Reset the speed to 16 if left ctrl isn't pressed
    if(Input.GetKey("left ctrl") && isGrounded)
    {
        speed = speed * crouchSpeed;
        isCrouching = true;
        isStanding = false;
    }
    else 
    {
        speed = 16f;
        isCrouching = false;
        isStanding = true;
    }
    ...
    // 2) Move the character according to speed
    Vector3 move = transform.right * x + transform.forward * z;
    controller.Move(move * speed * Time.deltaTime);
    ...
    // 3) Apply the sprint factor to speed
    if(Input.GetKey("left shift") && isGrounded && isStanding) 
    {
        speed = speed * sprintSpeed;
        isSprinting = true;
    }
    else 
    {
        speed = 16f;
        isSprinting = false;
    }
}

如您所见，冲刺因子被忽略，因为角色在冲刺因子被应用之前被移动。 解决方案是在移动角色之前应用冲刺因子。

void Update()
{
    ...
    // 1) Reset the speed to 16 if left ctrl isn't pressed
    if(Input.GetKey("left ctrl") && isGrounded)
    {
        speed = speed * crouchSpeed;
        isCrouching = true;
        isStanding = false;
    }
    else 
    {
        speed = 16f;
        isCrouching = false;
        isStanding = true;
    }
    ...
    // 2) Apply the sprint factor to speed
    if(Input.GetKey("left shift") && isGrounded && isStanding) 
    {
        speed = speed * sprintSpeed;
        isSprinting = true;
    }
    else 
    {
        speed = 16f;
        isSprinting = false;
    }
    ...
    // 2) Move the character according to speed (included the sprint factor)
    Vector3 move = transform.right * x + transform.forward * z;
    controller.Move(move * speed * Time.deltaTime);
    ...
}

奖励：当按下左 ctrl 键时，速度不会重新初始化。 然后速度降低每一帧。我不认为这是预期的。