Eyes.cs

#region
using System;
using UnityEngine;

#endregion

[Serializable]
public class Eyes
{
    public float fieldOfView = 60.0f;
    public Transform transform;
    public float viewDistance = Mathf.Infinity;

    public bool TargetIsReachable(Vector3 targetPosition)
    {
        var distance = Vector3.Distance(this.transform.position, targetPosition);
        if (this.TargetIsInSight(targetPosition))
        {
            var hits = Physics.RaycastAll(this.transform.position, targetPosition - this.transform.position, distance);
            foreach (var hit in hits)
                if (hit.transform.root.gameObject.isStatic)
                    return false;
            return true;
        }
        return false;
    }

    public bool TargetIsInSight(Vector3 targetPosition)
    {
        var distance = Vector3.Distance(this.transform.position, targetPosition);
        if (distance > this.viewDistance)
            return false;
        if (Vector3.Angle(this.transform.position + this.transform.forward, targetPosition) > this.fieldOfView)
            return false;
        return true;
    }
}