AI Path-finding error

I have been working on this path finding script for my android app. I'm getting an error that i can seem to fix. Can anyone help? Thanks.

Gates are triggers with rigidbodys at the edge of an area. Areas are also triggers with rigidbodys. The AI has a CharacterController for movement, and a collider acting as a trigger for the path.

Error:

Code (csharp):

1. NullReferenceException: Object reference not set to an instance of an object
2. Boo.Lang.Runtime.RuntimeServices.CheckNumericPromotion (IConvertible convertible)
3. Boo.Lang.Runtime.RuntimeServices.CheckNumericPromotion (System.Object value)
4. Boo.Lang.Runtime.RuntimeServices.UnboxInt32 (System.Object value)
5. AI_Controller.Update () (at Assets/AI_Controller.js:46)
6.  

AI movement - The error is coming from this.

Code (csharp):

1. #pragma strict
2. var health : float = 100f;
3. var deathEffect : GameObject;
4.  
5. var currentArea : GameObject;
6. var player : GameObject;
7. //@HideInInspector
8. //var playerScript : GameObject;
9. var playerArea : GameObject;
10. var targetDoor : GameObject;
11. var currentPathLength : float;
12. @HideInInspector
13. var startDelay : int = 5;
14. var controller : CharacterController;
15. function Start () {
16. currentPathLength = Mathf.Infinity;
17. player = GameObject.FindGameObjectWithTag("Player");
18. //playerScript = player.GetComponent(Player_Move);
19. startDelay = 5;
20. controller = gameObject.GetComponent(CharacterController);
21. }
22.  
23. function Update () {
24.  
25.  
26.  
27.   if(health <= 0) {
28.     if(deathEffect != null)
29.       Instantiate(deathEffect, transform.position,transform.rotation);
30.     Destroy(gameObject);
31.   }
32.  
33.   if(startDelay <= 0) {
34.  
35.     var playerScript = player.GetComponent(Player_Move);
36.     playerArea = playerScript.currentAreaP;
37.    
38.     for(var doorChecking : GameObject in currentArea.GetComponent(AI_Area).gates) {
39.    
40.       Debug.Log("a");
41.      
42.       for(var i = 0; i < doorChecking.GetComponent(AI_Gate).areas.length-1; i++) {
43.      
44.         if(doorChecking.GetComponent(AI_Gate).areas[i] == playerArea)
45.        
46.           var gates : int = doorChecking.GetComponent(AI_Gate).numberOfGates[i];
47.          
48.           Debug.Log(gates);
49.          
50.           if(gates < currentPathLength) {
51.          
52.             targetDoor = doorChecking;
53.            
54.             currentPathLength = gates;
55.           }
56.       }
57.     }
58.   } else {
59.   startDelay--;
60.   }
61.  
62.   currentPathLength = Mathf.Infinity;
63.  
64.       //Move the AI
65.       var moveDir = Physics.gravity;
66.       if(targetDoor != null) {
67.         var targetRot = Quaternion.LookRotation(Vector3(targetDoor.gameObject.transform.position.x,0,targetDoor.gameObject.transform.position.z) - Vector3(transform.position.x,0,transform.position.z));
68.         transform.rotation = Quaternion.Slerp(transform.rotation, targetRot, Time.deltaTime * 5);
69.         moveDir += transform.forward;
70.       }
71.       controller.Move(moveDir *2* Time.deltaTime);
72.      
73. }
74.  
75. function OnTriggerEnter(other : Collider) {
76.   if(other.tag == "AI_area")
77.     currentArea = other.gameObject;
78. }
79.  
80.  

AI_area

Code (csharp):

1. #pragma strict
2.  
3.  
4. var gates = new Array();
5.  
6. //Get touching gates
7. function OnTriggerEnter(other : Collider)  {
8.   if(other.tag == "AI_gate")
9.     gates.Add(other.gameObject);
10.     Debug.Log(gameObject.name + " : " + gates.length);
11. }
12.  
13.  

AI_gate

Code (csharp):

1. #pragma strict
2.  
3. var areas = new Array();
4. var numberOfGates = new Array();
5. var touchingAreas = new Array();
6. var findAreas : boolean = true;
7.  
8. @HideInInspector
9. var findAreasDelay : float = 2f;//Delay before we find the areas
10.  
11. @HideInInspector
12. var phase : int = 0;
13.  
14. @HideInInspector
15. var doorOpen : boolean = true;//Is the door unlocked
16.  
17.  
18. function Start () {
19.   doorOpen = true;
20.   areas = GameObject.FindGameObjectsWithTag("AI_area");
21.   numberOfGates.length = areas.length;
22.   findAreas = true;
23.   findAreasDelay = 2f;
24.   phase = 0;
25. }
26.  
27. function Update () {
28.  
29.   if(findAreas  findAreasDelay <= 0) {
30.     for(var touchingArea : GameObject in touchingAreas) {
31.       for(var i = 0; i <= areas.length-1; i++) {
32.         if(areas[i] == touchingAreas) {
33.           numberOfGates[i] = 1;
34.         }
35.       }
36.     }
37.     for(phase = 2; phase <= areas.length-1; phase++) {
38.       for(i = 0; i <= areas.length-1; i++) {
39.         if(numberOfGates[i] == phase - 1) {
40.           var areaG : GameObject = areas[i];
41.           var currentAreaGates = areaG.GetComponent(AI_Area).gates.length;
42.           for(var l = 0; l <= currentAreaGates; l++) {
43.             var checkDoor : GameObject = areaG.GetComponent(AI_Area).gates[l];
44.             if(checkDoor != gameObject) {
45.               for(var checkArea : GameObject in checkDoor.GetComponent(AI_Gate).touchingAreas) {
46.                 for(var j = 0; j <= areas.length-1; j++) {
47.                   if(areas[i] == checkArea  numberOfGates[i] == null)
48.                       numberOfGates[j] = phase;
49.                 }
50.               }
51.             }
52.           }
53.         }
54.       }
55.     }
56.    
57.  
58.  
59.  
60.     findAreas = false;
61.  }
62.  
63.   findAreasDelay--;
64.  
65. }
66.  
67. //Get the touching areas
68. function OnTriggerEnter(other : Collider) {
69.  
70.   if(other.tag == "AI_area")
71.     touchingAreas.Add(other.gameObject);
72.  
73. }
74.  

 

After a lot of work i got it down to one line. I marked the line in red below so that it's easy to find. I still haven't been able to fix it though.


var areas = new Array();

var numberOfGates = new Array();

var touchingAreas = new Array();

var findAreas : boolean = true;

var gates : int[];//For debuging

@HideInInspector

var findAreasDelay : float = 2f;//Delay before we find the areas



@HideInInspector

var phase : int = 0;



@HideInInspector

var doorOpen : boolean = true;//Is the door unlocked





function Awake () {

doorOpen = true;

areas = GameObject.FindGameObjectsWithTag("AI_area");

numberOfGates.length = areas.length;

findAreas = true;

findAreasDelay = 2f;

phase = 0;

}

//Get the touching areas

function OnTriggerEnter(other : Collider) {


if(other.tag == "AI_area") {
touchingAreas.Add(other.gameObject);
Debug.Log("Added touching area: "+ other.gameObject.name + " to " + gameObject.name);
}

}

function Update () {



if(findAreas findAreasDelay <= 0) {

for(var touchingArea : GameObject in touchingAreas) {
Debug.Log("phase start 1");
for(var i = 0; i <= areas.length-1; i++) {
Debug.Log("phase marker 1");
if(areas == touchingArea) {

numberOfGates = 1;
Debug.Log("phase end 1");
}

}

}

for(phase = 2; phase <= areas.length-1; phase++) {
Debug.Log("phase start " + phase);
for(i = 0; i <= areas.length-1; i++) {

if(numberOfGates == phase - 1) {

var areaG : GameObject = areas;

var currentAreaGates = areaG.GetComponent(AI_Area).gates.length;

for(var l = 0; l <= currentAreaGates-1; l++) {

var checkDoor : GameObject = areaG.GetComponent(AI_Area).gates[l];

if(checkDoor != gameObject) {

for(var checkArea : GameObject in checkDoor.GetComponent(AI_Gate).touchingAreas) {

for(var j = 0; j <= areas.length-1; j++) {
//Debug.Log("phase marker " + phase);
if(areas == checkArea numberOfGates == null) {
Debug.Log("phase marker " + phase);
numberOfGates[j] = phase;
gates = numberOfGates;
Debug.Log("phase end " + phase);
}
}

}

}

}

}

}

}
Debug.Log(numberOfGates);


/*
var outString = "";
for(var i2 = 0; i2 < numberOfGates.length; i2++) {
outString = outString + ", " + numberOfGates[i2];
}
Debug.Log(gameObject.name + " " + outString);
*/

findAreas = false;

}



findAreasDelay-=1;



}

 

I think i'v fixed it.

Code (csharp):

1.  
2. var areas = new Array();
3.  
4. var numberOfGates = new Array();
5.  
6. var touchingAreas = new Array();
7.  
8. var findAreas : boolean = true;
9.  
10. var gates : int[];//For debuging
11.  
12. @HideInInspector
13.  
14. var findAreasDelay : float = 2f;//Delay before we find the areas
15.  
16.  
17.  
18. @HideInInspector
19.  
20. var phase : int = 0;
21.  
22.  
23.  
24. @HideInInspector
25.  
26. var doorOpen : boolean = true;//Is the door unlocked
27.  
28.  
29.  
30.  
31.  
32. function Awake () {
33.  
34.   doorOpen = true;
35.  
36.   areas = GameObject.FindGameObjectsWithTag("AI_area");
37.  
38.   numberOfGates.length = areas.length;
39.  
40.   findAreas = true;
41.  
42.   findAreasDelay = 2f;
43.  
44.   phase = 0;
45.  
46. }
47.  
48. //Get the touching areas
49.  
50. function OnTriggerEnter(other : Collider) {
51.  
52.  
53.   if(other.tag == "AI_area") {
54.     touchingAreas.Add(other.gameObject);
55.     Debug.Log("Added touching area: "+ other.gameObject.name + " to " + gameObject.name);
56.   }
57.  
58. }
59.  
60. function Update () {
61.  
62.  
63.  
64.   if(findAreas  findAreasDelay <= 0) {
65.  
66.     for(var touchingArea : GameObject in touchingAreas) {
67.       Debug.Log("phase start 1");
68.       for(var i = 0; i <= areas.length-1; i++) {
69.         Debug.Log("phase marker 1");
70.         if(areas[i] == touchingArea) {
71.  
72.           numberOfGates[i] = 1;
73.           Debug.Log("phase end 1");
74.         }
75.  
76.       }
77.  
78.     }
79.  
80.     for(phase = 2; phase <= areas.length-1; phase++) {
81.       Debug.Log("phase start " + phase);
82.       for(i = 0; i <= areas.length-1; i++) {
83.        
84.         if(numberOfGates[i] == phase - 1) {
85.          
86.           var areaG : GameObject = areas[i];
87.  
88.           var currentAreaGates = areaG.GetComponent(AI_Area).gates.length;
89.          
90.           for(var l = 0; l <= currentAreaGates-1; l++) {
91.  
92.             var checkDoor : GameObject = areaG.GetComponent(AI_Area).gates[l];
93.            
94.             if(checkDoor != gameObject) {
95.              
96.               for(var checkArea : GameObject in checkDoor.GetComponent(AI_Gate).touchingAreas) {
97.                
98.                 for(var j = 0; j <= areas.length-1; j++) {
99.                   Debug.Log("phase marker " + phase);
100.                   gates = numberOfGates;
101.                   if(areas[j] == checkArea  numberOfGates[j] == null) {
102.                       numberOfGates[j] = phase;
103.                       gates = numberOfGates;
104.                       Debug.Log("phase end " + phase);
105.                   }
106.                 }
107.  
108.               }
109.  
110.             }
111.  
112.           }
113.  
114.         }
115.  
116.       }
117.  
118.     }
119.     Debug.Log(numberOfGates);
120.  
121.  
122.     /*
123.     var outString = "";
124.     for(var i2 = 0; i2 < numberOfGates.length; i2++) {
125.       outString = outString + ", " + numberOfGates[i2];
126.     }
127.     Debug.Log(gameObject.name + " " + outString);
128.     */
129.    
130.     findAreas = false;
131.  
132.  }
133.  
134.  
135.  
136.   findAreasDelay-=1;
137.  
138.  
139.  
140. }
141.  
142.  
143.  
144.  

 

Remember to set numberOfGates, else your numberOfGates == null check wont work as numberOfGates is null