Unity2D爬梯子demo

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

public class ClimbLadder : MonoBehaviour
{
    private float vertical;//垂直输入
    private float speed = 3f;//爬梯子的速度
    private bool isLadder; //是否站在梯子上
    private bool isClimbing;//是否在爬梯子的状态

    Animator anim;

    [SerializeField]
    private Rigidbody2D rb;
    // Start is called before the first frame update
    void Start()
    {
        anim = GetComponent<Animator>();
    }

    // Update is called once per frame
    void Update()
    {
        vertical = Input.GetAxis("Vertical");

        if (isLadder==true&&Mathf.Abs(vertical)>0f) //在梯子上的时候 同时 垂直输入的绝对值Mathf.Abs  大于0 的时候
        {
            isClimbing = true;
        }
    }

    private void FixedUpdate()
    {
        if (isClimbing==true)
        {
            rb.gravityScale = 0f;//爬梯子的时候重量比例为0
            rb.velocity = new Vector2(rb.velocity.x,vertical*speed);
        }
        else
        {
            rb.gravityScale = 1f;
        }
    }
    private void OnTriggerEnter2D(Collider2D collision)
    {
        if (collision.CompareTag("Ladder"))
        {
            isLadder = true;
            isClimbing = true;
            anim.SetBool("climbing", true);
        }
    }

    private void OnTriggerExit2D(Collider2D collision)
    {
        if (collision.CompareTag("Ladder"))
        {
            isLadder = false;
            isClimbing = false; //在更新退出梯子的时候触发攀爬为false
            anim.SetBool("climbing", false);
        }
       
    }
}