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c# - 如何使用 bool 来判断玩家是否跳过

问题描述

我正在为我正在开发的游戏制作一些动画（仍处于早期阶段，并且是编码新手）。现在我正在尝试使用 bool 来检测玩家是否在跳跃，然后如果它返回 true，那么动画就会播放。

角色控制器：

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

public class Character2dController : MonoBehaviour
{
    public float MovementSpeed = 8;
    public float JumpForce = 5;
    public Transform feet;

    public bool isJumping;
  
    private Rigidbody2D rb;

    public LayerMask groundLayers;

   
    // Start is called before the first frame update
    void Start()
    {
        rb = GetComponent<Rigidbody2D>();
        isJumping = false;

    }

    // Update is called once per frame
    void Update()
    {
        Jump();
   
        //LR movement
        var movement = Input.GetAxis("Horizontal");
        transform.position += new Vector3(movement, 0, 0) * Time.deltaTime * MovementSpeed;
        
        isJumping = false;

    }

    //Jumping
    void Jump()
    {
        if (Input.GetButtonDown("Jump") && IsGrounded())
        {
            isJumping = true;
            rb.AddForce(new Vector2(0, JumpForce), ForceMode2D.Impulse);

        }
    }

    //Grounding
    public bool IsGrounded()
    {
        Collider2D groundCheck = Physics2D.OverlapCircle(feet.position, 0.5f, groundLayers);
        
        if (groundCheck.gameObject != null)
        {
            return true; 
        }
        return false;
    }

}

人物动画：

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

public class CharacterAnimation : MonoBehaviour
{

    private Animator anim;
    private bool isJumping;

    private Rigidbody2D rb;

    // Start is called before the first frame update
    void Start()
    {
        anim = GetComponent<Animator>();
        isJumping = GetComponent<Character2dController>().isJumping;
        isJumping = false;
        
    }

    // Update is called once per frame
    void Update()
    {
        //Walking Anim
        if (Input.GetKey("a") || Input.GetKey("d"))
        {
            anim.SetBool("isWalking", true);
        }
        else
        {
            anim.SetBool("isWalking", false);
        }

        //Character flipping
        if (Input.GetKey("a"))
        {
            transform.localScale = new Vector3(-1, 1, 1);
        }

        if (Input.GetKey("d"))
        {
            transform.localScale = new Vector3(1, 1, 1);
        }

        if(isJumping == true)
        {
            anim.SetTrigger("Up");
        }

    }

}

然而，isJumping bool 似乎永远不会变为 true，因此动画永远不会播放。我已经尝试将它放在字符控制器代码中的多个位置，但它们似乎都不起作用。我想知道我是否做错了什么，或者我是否应该使用不同的方式来为玩家跳跃设置动画。同样，我对编码还很陌生，所以如果有任何问题，请随时告诉我。谢谢！

标签： c#unity3danimation

解决方案

public class CharacterAnimation : MonoBehaviour
{

    private Animator anim;
    private bool isJumping;

    private Rigidbody2D rb;

    // Start is called before the first frame update
    void Start()
    {
        anim = GetComponent<Animator>();
        isJumping = GetComponent<Character2dController>().isJumping;//assigns value
        isJumping = false;
        
    }
.
.
.

我注释的行仅将类中变量的值分配给您isJumping的类中的变量。因此，当您更改类中的变量时，类中的变量不会更新。Character2dControllerisJumpingCharacterAnimationisJumpingCharacter2dControllerisJumpingCharacterAnimation

因此，您可以检查类中的isJumping变量Character2dController：

public class CharacterAnimation : MonoBehaviour
{

    private Animator anim;
    private Character2dController character2dController;

    private Rigidbody2D rb;

    // Start is called before the first frame update
    void Start()
    {
        anim = GetComponent<Animator>();
        character2dController = GetComponent<Character2dController>();//now we are holding a reference to the Character2dController component
    }
    // your other code here
    if(character2dController.isJumping == true)
    {
        anim.SetTrigger("Up");
    }

此外，在 中Character2dController，您在每一帧都设置isJumping为false，我相信这不是您想要做的。而不是直接设置为false，您应该检查您是否接地，并isJumping相应地更新。

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