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Unity做2D小游戏5------多个动画互相转换

article 2025/2/12 19:15:07

现在我们要实现多个动画的相互转换，这里有jump，run，idle和fall四个状态,分别创建动画资源，具体步骤在Unity做2D小游戏4------让角色动起来-CSDN博客有写，最后如下图所示。

在Animator中把上个练习的布尔类型删除，添加int类型state，因为布尔类型只能针对两个状态。

然后把状态摆好，右键状态”Make Transition”，添加桥梁，两两之间都有两条桥梁。

每条桥梁取消勾选Has Exit Time，Transition Duration改为0，这样动画衔接会更流畅，不会有延迟。

修改右下方的Conditions，只保留一个状态state，参数看下图设置，数字看文字。

指向Static静止状态-------0

指向Running奔跑状态----1

指向Jump跳跃状态--------2

指向Fall下落状态----------3

在角色脚本里面修改添加如下代码：

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

public class Playermovement : MonoBehaviour
{
    private Rigidbody2D rb;
    private BoxCollider2D coll;
    private SpriteRenderer sprite;
    private Animator anim;

    [SerializeField] private LayerMask jumpableGround;
    private float dirX = 0f;

    [SerializeField] private float moveSpeed = 7f;
    [SerializeField] private float jumpForce = 7f;

    private enum MovementState { idle,running,jumping,falling }
    // Start is called before the first frame update 第一次运行
    private void Start()
    {
        rb=GetComponent<Rigidbody2D>();
        coll = GetComponent<BoxCollider2D>();
        sprite = GetComponent<SpriteRenderer>();
        anim = GetComponent<Animator>();
    }

    // Update is called once per frame  反复运行
    private void Update()
    {
        //水平方向速度
        dirX = Input.GetAxisRaw("Horizontal");
        rb.velocity = new Vector2(dirX * moveSpeed,rb.velocity.y);

        if (Input.GetButtonDown("Jump") && IsGrounded())
        {
            rb.velocity = new Vector2(rb.velocity.x, jumpForce);
        }
        UpdateAnimationState();
    }
    private void UpdateAnimationState()
    {
        MovementState state;
        if (dirX > 0f)
        {
            state = MovementState.running;
            sprite.flipX = false;
        }
        else if (dirX < 0f)
        {
            state = MovementState.running;
            sprite.flipX = true;//反方向走，人物会翻转
        }
        else
        {
            state = MovementState.idle;
        }

        if (rb.velocity.y > .1f)
        {
            state = MovementState.jumping;
        }
        else if (rb.velocity.y < -.1f)
        {
            state = MovementState.falling;
        }
        anim.SetInteger("state", (int)state);
    }

    private bool IsGrounded()
    {
        return Physics2D.BoxCast(coll.bounds.center, coll.bounds.size, 0f ,Vector2.down, .1f ,jumpableGround);
    }
}

在Layers里添加一个Ground层