Enemy Line of Sight Help Needed

Questions & Answers
1

I am making a 2d top-down stealth game and I have an enemy character that patrols waypoints. I have a 2Draycast that looks in the direction that the enemy is looking. The problem is that once my enemy character reaches the waypoint, the raycast just disappears. I have a feeling my direction variable is the reason why this is happening, but what alternatives do I have to ensure the 2Draycast faces in the direction faces in the direction the enemy is facing and that it does not disappear?

void CanSeePlayer(){
        direction = (moveSpots[nextPosition].position - transform.position).normalized;
        RaycastHit2D hit = Physics2D.Raycast(transform.position, direction, distance);
        Debug.DrawLine(transform.position, transform.position + direction * distance, Color.blue);
    }

And below will be my patrol function, which may be helpful for anyone answering.

void Patrol(){
        transform.position = Vector2.MoveTowards(transform.position, moveSpots[nextPosition].position, speed * Time.deltaTime);

        if (Vector2.Distance(transform.position, moveSpots[nextPosition].position) < 0.5f)
        {
            if (waitTime <= 0){
                nextPosition = (nextPosition+1) % moveSpots.Length;
                waitTime = startWaitTime;
            } 
            else{
                waitTime -= Time.deltaTime;
            }
                
        }
    }

Both are called in Update.

2

What happens if you just do :

nextPosition++;

Instead of :

nextPosition = (nextPosition + 1) % moveSpots.Length;

Based on your comment you can do something like :

nextPosition++;
if (nextPosition > moveSpots.Length)
{
     nextPosition = 0;
}
3

I get a null exception. My enemy is supposed to move back and forth on it’s path and continuously increasing nextPosition will not allow for that.