Object reference not set to an instance of an object

Hi all,

I'm making a pac-man clone for a school project of learning C#.
Only i got this error: Object reference not set to an instance of an object in rule 104

I don't know what to do, this is my script:

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4. public class Paccie : MonoBehaviour
5. {
6.     public float speed = 4.0f;
7.  
8.     private Vector2 direction = Vector2.zero;
9.  
10.     private Node currentNode;
11.  
12.     private void Start()
13.     {
14.         Node node = GetNodeAtPosition(transform.localPosition);
15.  
16.         if (node != null)
17.         {
18.             currentNode = node;
19.             Debug.Log(currentNode);
20.         }
21.     }
22.  
23.     private void Update()
24.     {
25.         CheckInput();
26.  
27.         //Move();
28.  
29.         UpdateOrientation();
30.     }
31.  
32.     private void CheckInput()
33.     {
34.         if (Input.GetKeyDown(KeyCode.LeftArrow))
35.         {
36.             direction = Vector2.left;
37.             MoveToNode(direction);
38.  
39.         }
40.         else if (Input.GetKeyDown(KeyCode.RightArrow))
41.         {
42.             direction = Vector2.right;
43.             MoveToNode(direction);
44.  
45.         }
46.         else if (Input.GetKeyDown(KeyCode.UpArrow))
47.         {
48.             direction = Vector2.up;
49.             MoveToNode(direction);
50.  
51.         }
52.         else if (Input.GetKeyDown(KeyCode.DownArrow))
53.         {
54.             direction = Vector2.down;
55.             MoveToNode(direction);
56.         }
57.     }
58.  
59.     private void Move()
60.     {
61.  
62.         transform.localPosition += (Vector3)(direction * speed) * Time.deltaTime;
63.     }
64.  
65.     private void MoveToNode (Vector2 d)
66.     {
67.         Node moveToNode = CanMove (d);
68.  
69.         if (moveToNode != null)
70.         {
71.             transform.localPosition = moveToNode.transform.position;
72.             currentNode = moveToNode;
73.         }
74.     }
75.  
76.     private void UpdateOrientation()
77.     {
78.         if (direction == Vector2.left)
79.         {
80.             transform.localScale = new Vector3(-1, 1, 1);
81.             transform.localRotation = Quaternion.Euler(0, 0, 0);
82.         }
83.         else if (direction == Vector2.right)
84.         {
85.             transform.localScale = new Vector3(1, 1, 1);
86.             transform.localRotation = Quaternion.Euler(0, 0, 0);
87.         }
88.         else if (direction == Vector2.up)
89.         {
90.             transform.localScale = new Vector3(1, 1, 1);
91.             transform.localRotation = Quaternion.Euler(0, 0, 90);
92.         }
93.         else if (direction == Vector2.down)
94.         {
95.             transform.localScale = new Vector3(1, 1, 1);
96.             transform.localRotation = Quaternion.Euler(0, 0, 270);
97.         }
98.     }
99.  
100.     Node CanMove(Vector2 d)
101.     {
102.         Node moveToNode = null;
103.  
104.         for (int i = 0; i < currentNode.neighbors.Length; i++)
105.         {
106.             if (currentNode.validDirections [i] == d)
107.             {
108.                 moveToNode = currentNode.neighbors [i];
109.                 break;
110.             }
111.         }
112.         return moveToNode;
113.     }
114.  
115.     private Node GetNodeAtPosition (Vector2 pos)
116.     {
117.         GameObject tile = GameObject.Find("Game").GetComponent<GameBoard>().board[(int)pos.x, (int)pos.y];
118.  
119.         if (tile != null)
120.         {
121.             return tile.GetComponent<Node>();
122.         }
123.         return null;
124.     }
125. }

Can somebody help me please?

Thanks, Sam

 

Hi, thanks for your reply.

I figured it: Pac-Man has to be exactly on a node but i cant get to it!
all objects has another null position so what to do now?

Thanks Sam

 

That's right, I tell you something more.
The food are called the nodes, if Pac-Man is on a specific node the inspector should display on which node Pac-Man is. Only the problem is: I can't get Pac-Man excatly on that node. So it doesn't give any info about which node Pac-Man is. With that info can i go further, but I don't know how to place Pac-Man excatly on that node and that the node Pac-man recognize as: oh here Pac-Man found at node ....
Oh and each different sort of object like walls and nodes and Pac-Man does all have another null point in position. so I can't say Pac-Man go on that position which is equal to that node, because the values are different.

I hope i gave enough info for you so that you understand my problem.

Thanks Sam