Node.cs

public class Node {
    public Node Parent;
    public Vector2Int Position;

    // A* Algorithm variables
    public float DistanceToTarget;
    public float Cost;
    public float Weight;

    public float F {
        get {
            if (DistanceToTarget != -1 && Cost != -1)
                return DistanceToTarget + Cost;
            return -1;
        }
    }

    public bool Walkable;

    public Node(Vector2Int pos, bool walkable, float weight = 1) {
        Parent = null;
        Position = pos;
        DistanceToTarget = -1;
        Cost = 1;
        Weight = weight;
        Walkable = walkable;
    }

    public override string ToString() {
        return $"Node({Position.x}, {Position.y}, {Walkable})";
    }
}