TigerProject/Assets/Test/Monster/GroundEnemyMovement.cs

using UnityEngine;
using System.Collections.Generic;

public class GroundEnemyMovement : Entity
{
    [SerializeField]
    private Rigidbody2D rigidBody;
    [SerializeField]
    private SpriteRenderer spriteRenderer;
    [SerializeField]
    private float Speed = 3f;
    [SerializeField]
    private float startDirection = 1.5f;

    private float currentDirection;
    private float halfWidth;
    private Vector2 movemenet;

    private void Start()
    {
        halfWidth = spriteRenderer.bounds.extents.x;
        currentDirection = startDirection > 0 ? 1f : -1f;
        spriteRenderer.flipX = currentDirection == 1 ? false : true;
    }

    void FixedUpdate()
    {
        movemenet.x = Speed * currentDirection;
        movemenet.y = rigidBody.linearVelocity.y;
        rigidBody.linearVelocity = movemenet;

        SetDirection();
    }

    private void SetDirection()
    {
        Vector2 frontVec = transform.position;
        Vector2 wallDir = Vector2.right;

        if (currentDirection > 0)
        {
            frontVec += Vector2.right * halfWidth;
            wallDir = Vector2.right;
        }else
        {
            frontVec += Vector2.left * halfWidth;
            wallDir = Vector2.left;
        }

        RaycastHit2D cliffHit = Physics2D.Raycast(frontVec, Vector2.down, 1f, LayerMask.GetMask("Ground"));
        Debug.DrawRay(frontVec, Vector2.down * 1f, Color.green);

        float wallDist = halfWidth + 0.2f;
        RaycastHit2D wallHit = Physics2D.Raycast(transform.position, wallDir, wallDist, LayerMask.GetMask("Ground"));
        Debug.DrawRay(transform.position, wallDir * wallDist, Color.blue);

        if (cliffHit.collider == null || wallHit.collider != null)
        {
            Turn();
        }
    }

    private void Turn()
    {
        currentDirection *= -1;
        spriteRenderer.flipX = !spriteRenderer.flipX;
    }

    private void OnCollisionEnter2D(Collision2D collision)
    {
        // <20>ε<EFBFBD><CEB5><EFBFBD> <20><>ü<EFBFBD><C3BC> <20>±װ<C2B1> "Player"<22><><EFBFBD><EFBFBD>
        if (collision.gameObject.CompareTag("Player"))
        {
            Die();
        }
    }
}