[part 6] crawler enemy bugging

[Niyam Shah]

my crawler enemies movement distance is depending on the speed i set

50 speed will be fast with a long distance while 10 speed will be slow with a rlly short distance

also plssssss allow the blog part 6-10 to be free bc they r so vital to check if you have code errors bc the videos r sooo fast

using UnityEngine;

public class Crawler : Enemy
{
    [SerializeField] private float flipWaitTime;
    [SerializeField] private float ledgeCheckX;
    [SerializeField] private float ledgeChecky;
    [SerializeField] private LayerMask whatIsGround;


    float timer;

    // Start is called before the first frame update
    protected override void Start()
    {
        base.Start();
        rb.gravityScale = 12f;
    }

    // Update is called once per frame

    protected override void UpdateEnemyStates()
    {
        switch (currentEnemyStates)
        {
            case EnemyStates.Crawler_Idle:
                Vector3 _ledgeCheckStart = transform.localScale.x > 0 ? new Vector3(ledgeCheckX, 0) : new Vector3(-ledgeCheckX, 0);
                Vector2 _wallCheckDir = transform.localScale.x > 0 ? transform.right : -transform.right;

                if (!Physics2D.Raycast(transform.position + _ledgeCheckStart, Vector2.down, ledgeChecky, whatIsGround)
                    || Physics2D.Raycast(transform.position, _wallCheckDir, ledgeCheckX, whatIsGround))
                {
                    ChangeState(EnemyStates.Crawler_Flip);
                }

                if (transform.localScale.x > 0)
                {
                    rb.velocity = new Vector2(speed, rb.velocity.y);
                }
                else
                {
                    rb.velocity = new Vector2(-speed, rb.velocity.y);
                }
                break;

            case EnemyStates.Crawler_Flip:
                timer += Time.deltaTime;

                if (timer > flipWaitTime)
                {
                    timer = 0;
                    transform.localScale = new Vector2(transform.localScale.x * -1, transform.localScale.y);
                    ChangeState(EnemyStates.Crawler_Idle);
                }
                break;
        }
    }
}

using UnityEngine;

public class Enemy : MonoBehaviour
{
    [SerializeField] protected float health;
    [SerializeField] protected float recoilLength;
    [SerializeField] protected float recoilFactor;
    [SerializeField] protected bool isRecoiling = false;

    [SerializeField] protected float speed;

    [SerializeField] protected float damage;

    protected float recoilTimer;
    protected Rigidbody2D rb;

    protected enum EnemyStates
    {
        //crawler
        Crawler_Idle,
        Crawler_Flip
    }
    protected EnemyStates currentEnemyStates;

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

    // Update is called once per frame
    //enemy death and recoil
    protected virtual void Update()
    {

        if (isRecoiling)
        {
            if (recoilTimer < recoilLength)
            {
                recoilTimer += Time.deltaTime;
            }
            else
            {
                isRecoiling = false;
                recoilTimer = 0;
            }
        }
        else
        {
            UpdateEnemyStates();
        }
    }

    //enemy takes damage and has recoil
    public virtual void EnemyHit(float _damageDone, Vector2 _hitDirection, float _hitForce)
    {
        health -= _damageDone;

        if (!isRecoiling)
        {
            rb.AddForce(-_hitForce * recoilFactor * _hitDirection);
        }
    }

    //make player take damage when trigger collider touches player collider - not when player is invincible
    protected void OnCollisionStay2D(Collision2D _other)
    {
        if (_other.gameObject.CompareTag("Player") && !PlayerController.Instance.pState.invincible)
        {
            Attack();
            PlayerController.Instance.HitStopTime(0, 5, 0.5f);
        }
    }

    protected virtual void UpdateEnemyStates() { }
    
        protected void ChangeState(EnemyStates _newState)
    {
        currentEnemyStates = _newState;
    }
    
    protected virtual void Attack()
    {
        PlayerController.Instance.TakeDamage(damage);
    }

}

[Niyam Shah]

ok i found the fix

the ledge check y value was too low – not sure why but a really low value makes it constantly detect a ledge – i set mine to 1.5

the ledge check value should be higher – i set mine to 3

they work in opposites]

really strange but it works now

[Terence]

Glad you managed to find the solution Niyam.

[Aka]

Always use Gizmos when you use Raycast. The ray check depend of your asset. If you dont use exactly the same asset, the value must be different. Gizmos help you

Here by example :

private void OnDrawGizmosSelected()
{
_ledgeCheckStart = transform.localScale.x > 0 ? new Vector3(ledgeCheckX, 0) : new Vector3(-ledgeCheckX, 0);
Gizmos.color = Color.blue;
Gizmos.DrawRay(transform.position + _ledgeCheckStart, Vector2.down * ledgeCheckY);
}

[Author]

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