Physics Error

You guys mind helping me get this physics error solved(gmc is the name of the game object)

rigidbody.force assign attempt for 'Gmc' is not valid. Input position is { NaN, NaN, NaN }.
UnityEngine.Rigidbody:AddForceAtPosition(Vector3, Vector3)
Wheel:FixedUpdate() (at Assets/Scripts/Wheel.js:86)

Code (csharp):

1. var mass = 1.00;
2. var wheelRadius = 0.00;
3. var suspensionRange = 0.00;
4. var suspensionForce = 0.00;
5. var suspensionDamp = 0.00;
6. var compressionFrictionFactor = 0.00;
7.  
8. var sidewaysFriction = 0.00;
9. var sidewaysDamp = 0.00;
10. var sidewaysSlipVelocity = 0.00;
11. var sidewaysSlipForce = 0.00;
12. var sidewaysSlipFriction = 0.00;
13. var sidewaysStiffnessFactor = 0.00;
14.  
15. var forwardFriction = 0.00;
16. var forwardSlipVelocity = 0.00;
17. var forwardSlipForce = 0.00;
18. var forwardSlipFriction = 0.00;
19. var forwardStiffnessFactor = 0.00;
20.  
21. var frictionSmoothing = 1.00;
22.  
23. private var hit : RaycastHit;
24.  
25. private var parent : Rigidbody;
26. parent = transform.root.rigidbody;
27.  
28. private var graphic : Transform;
29. graphic = transform.FindChild("Graphic");
30.  
31. private var wheelCircumference = 0.00;
32. wheelCircumference = wheelRadius * Mathf.PI * 2;
33.  
34. private var usedSideFriction = 0.00;
35. private var usedForwardFriction = 0.00;
36. private var sideSlip = 0.00;
37. private var forwardSlip = 0.00;
38.  
39. var car : Car;
40. var driven = false;
41.  
42. var speed = 0.00;
43.  
44. var brake = false;
45. var skidbrake = false;
46.  
47. function FixedUpdate ()
48. {
49.     down = transform.TransformDirection(Vector3.down);
50.     if(Physics.Raycast (transform.position, down, hit, suspensionRange + wheelRadius)  hit.collider.transform.root != transform.root)
51.     {
52.         velocityAtTouch = parent.GetPointVelocity(hit.point);
53.        
54.         compression = hit.distance / (suspensionRange + wheelRadius);
55.         compression = -compression + 1;
56.         force = -down * compression * suspensionForce;
57.        
58.         t = transform.InverseTransformDirection(velocityAtTouch);
59.         t.z = t.x = 0;
60.         shockDrag = transform.TransformDirection(t) * -suspensionDamp;
61.        
62.         forwardDifference = transform.InverseTransformDirection(velocityAtTouch).z - speed;
63.         newForwardFriction = Mathf.Lerp(forwardFriction, forwardSlipFriction, forwardSlip * forwardSlip);
64.         newForwardFriction = Mathf.Lerp(newForwardFriction, newForwardFriction * compression * 1, compressionFrictionFactor);
65.         if(frictionSmoothing > 0)
66.             usedForwardFriction = Mathf.Lerp(usedForwardFriction, newForwardFriction, Time.fixedDeltaTime / frictionSmoothing);
67.         else
68.             usedForwardFriction = newForwardFriction;
69.         forwardForce = transform.TransformDirection(Vector3(0, 0, -forwardDifference)) * usedForwardFriction;
70.         forwardSlip = Mathf.Lerp(forwardForce.magnitude / forwardSlipForce, forwardDifference / forwardSlipVelocity, forwardStiffnessFactor);
71.        
72.         sidewaysDifference = transform.InverseTransformDirection(velocityAtTouch).x;
73.         newSideFriction = Mathf.Lerp(sidewaysFriction, sidewaysSlipFriction, sideSlip * sideSlip);
74.         newSideFriction = Mathf.Lerp(newSideFriction, newSideFriction * compression * 1, compressionFrictionFactor);
75.         if(frictionSmoothing > 0)
76.             usedSideFriction = Mathf.Lerp(usedSideFriction, newSideFriction, Time.fixedDeltaTime / frictionSmoothing);
77.         else
78.             usedSideFriction = newSideFriction;
79.         sideForce = transform.TransformDirection(Vector3(-sidewaysDifference, 0, 0)) * usedSideFriction;
80.         sideSlip = Mathf.Lerp(sideForce.magnitude / sidewaysSlipForce, sidewaysDifference / sidewaysSlipVelocity, sidewaysStiffnessFactor);
81.        
82.         t = transform.InverseTransformDirection(velocityAtTouch);
83.         t.z = t.y = 0;
84.         sideDrag = transform.TransformDirection(t) * -sidewaysDamp;
85.        
86.         parent.AddForceAtPosition(force + shockDrag + forwardForce + sideForce + sideDrag, hit.point);
87.  
88.         if(driven)
89.             car.AddForceOnMotor (forwardDifference * usedForwardFriction * Time.fixedDeltaTime);
90.         else
91.             speed += forwardDifference;
92.  
93.         graphic.position = transform.position + (down * (hit.distance - wheelRadius));
94.     }
95.     else
96.     {
97.         graphic.position = transform.position + (down * suspensionRange);
98.     }
99.    
100. stopMeBeforeIKillAgain = 360 * (speed / wheelCircumference) * Time.fixedDeltaTime;
101.     if(stopMeBeforeIKillAgain==stopMeBeforeIKillAgain) graphic.transform.Rotate(stopMeBeforeIKillAgain, 0, 0);
102. }
103.  
104.  

 

Comments and Debug are useful.

I guess it's -
parent.AddForceAtPosition(force + shockDrag + forwardForce + sideForce + sideDrag, hit.point)

The function AddForceAtPosition take two Vector3s.

 

What do you mean by debug?Oh by the way i got it fixed thanks!

 

The fault is speed equals float.NaN.

 

I got this error in this Please help me out .
Thanks in advance


rigidbody.velocity assign attempt for 'stone_1(Clone)' is not valid. Input velocity is { NaN, NaN, NaN }.
UnityEngine.Rigidbody:set_velocity(Vector3)
enemytouch:Shoot1() (at Assets/Scripts/enemytouch.js:100)