Rail Grinding For Sonic Game

Hey Guys i am making a sonic game, anyways i coded rail grinding but when i play the scene and try to grind it gives me null reference exception can someone help
here is the code in the line 93

Code (CSharp):

1. public Rail rail { get; set; }
2.     PlayerBhysics Player;
3.     ActionManager Actions;
4.     public Animator CharacterAnimator;
5.  
6.     public int currentSeg { get; set; }
7.     float transition;
8.     bool isCompleted;
9.     Quaternion CharRot;
10.     int railActiveCount;
11.  
12.     void Awake()
13.     {
14.         Actions = GetComponent<ActionManager>();
15.         Player = GetComponent<PlayerBhysics>();
16.     }
17.  
18.     void FixedUpdate()
19.     {
20.         railActiveCount += 1;
21.  
22.         if (rail != null)
23.         {
24.             OnRail(Player.SpeedMagnitude/100);
25.             for (float i = 0; i < Player.SpeedMagnitude; i++)
26.             {
27.                 //OnRail(Player.SpeedMagnitude/100);
28.             }
29.             Vector3 resety = Player.rigidbody.velocity;
30.             resety.y = 0;
31.             Player.rigidbody.velocity = resety;
32.  
33.             //Get Out of rail
34.             if(Actions.Action == 1)
35.             {
36.                 rail = null;
37.             }
38.  
39.         }
40.     }
41.  
42.     void Update()
43.     {
44.         if (rail != null)
45.         {
46.             if (Input.GetButton("A") && railActiveCount > 10)
47.             {
48.                 Actions.Action01.InitialEvents();
49.                 Actions.ChangeAction(1);
50.                 railActiveCount = 0;
51.             }
52.         }
53.     }
54.  
55.     void OnRail(float speed)
56.     {
57.         //Get out when over
58.  
59.         if (currentSeg >= (rail.RailArray.Length -1))
60.         {
61.             rail = null;
62.             return;
63.         }
64.         else if (currentSeg <= 0)
65.         {
66.             rail = null;
67.             return;
68.         }
69.  
70.  
71.         transition += speed;
72.  
73.         if(transition > 1)
74.         {
75.             transition = 0;
76.             currentSeg++;
77.         }
78.         else if(transition < 0)
79.         {
80.             transition = 1;
81.             currentSeg--;
82.         }
83.  
84.         transform.position = rail.LinearPosition(currentSeg, transition);
85.  
86.     }
87.  
88.     public void OnCollisionEnter(Collision col)
89.     {
90.         if(col.gameObject.tag == "Rail")
91.         {
92.             ////Debug.Log("Col");
93.             if(col.gameObject.transform.parent.GetComponent<Rail>() != null)
94.             {
95.                 if (railActiveCount > 20 && rail == null)
96.                 {
97.                     rail = col.gameObject.transform.parent.GetComponent<Rail>();
98.                     currentSeg = GetClosestPos(col.gameObject.transform.parent.GetComponent<Rail>().RailArray, transform.position);
99.                     Actions.ChangeAction(5);
100.                     railActiveCount = 0;
101.                 }
102.             }
103.         }
104.     }
105.  
106.     public int GetClosestPos(Vector3[] pos, Vector3 playerPos)
107.     {
108.         int seg = 0;
109.         Vector3 tMin = Vector3.zero;
110.         float minDist = Mathf.Infinity;
111.         Vector3 currentPos = playerPos;
112.         for(int i = 0; i < pos.Length; i++)
113.         {
114.             float dist = Vector3.Distance(pos[i], currentPos);
115.             if (dist < minDist)
116.             {
117.                 seg = i;
118.                 minDist = dist;
119.             }
120.         }
121.         return seg;
122.     }
123.  
124. }
125.  

 

This is not a support forum, post in scripting section.

Obviously either the gameObject, its parent, or the rail component references were unable to resolve hence the null reference. You need to debug your code to find out why, either you set up the object wrong or more likely its grabbing another object instead of the one you expect.

 

Code (csharp):

1.  
2. f(col.gameObject.transform.parent.GetComponent<Rail>() != null)
3.  

Assuming that collision has gameobject, and that gameobject has parent is kinda bold.

Most likely scenario there's no parent, and that's why it crashes.

 

Great thx

 

thx very much