Question Motorcycle controller with hinge joints

Hello!
I am trying to make a motorcycle controller using hinje joints since they are easier to setup as wheels then the wheel collider. But the problem is is this: since my vehicle has only 2 wheels, it doesnt have enought balance to the sides and I dont know what to do to keep it balanced while allowing a degree of Z axis turning. And then comes another problem: since I'm using the hinje joint and rigidbodyes, the steering is difficult to make. I also use forces to move the motorcycle.

Here is the script:

Code (CSharp):

1.  
2.  
3. using System.Collections;
4. using System.Collections.Generic;
5. using UnityEngine;
6.  
7. public class applyForce : MonoBehaviour
8. {
9.     public Rigidbody rb1;
10.     public Rigidbody rb2;
11.     public Camera cam;
12.     public Vector3 offset;
13.     Rigidbody rb;
14.     public float power;
15.     bool parkingDrag = false;
16.     public float steerSpeedInDegrees_per_Sec;
17.     // Start is called before the first frame update
18.     void Start()
19.     {
20.        /* rb1 = GetComponent<Rigidbody>();
21.         rb2 = GetComponent<Rigidbody>();*/
22.  
23.         rb=GetComponent<Rigidbody>();
24.     }
25.  
26.     // Update is called once per frame
27.     void Update()
28.     {
29.         cam.transform.position = transform.position + offset;
30.     }
31.  
32.     void FixedUpdate()
33.     {
34.  
35.         /*if(Input.GetKey(KeyCode.W))
36.         {
37.             rb2.AddForce(Vector3.forward * power, ForceMode.Acceleration);
38.         }
39.         if(Input.GetKey(KeyCode.S))
40.         {
41.             rb1.AddForce(Vector3.back * power, ForceMode.Acceleration);
42.         }*/
43.  
44.         if(Input.GetKey(KeyCode.W))
45.         {
46.             rb.AddForce(Vector3.forward * power, ForceMode.Acceleration);
47.         }
48.         if(Input.GetKey(KeyCode.S))
49.         {
50.             rb.AddForce(Vector3.back * power, ForceMode.Acceleration);
51.         }
52.         if(Input.GetKey(KeyCode.Space))
53.         {
54.             if(rb.velocity.z>0)
55.             {
56.                 rb.AddForce(Vector3.back * power * 2, ForceMode.Acceleration);
57.             }
58.             if(rb.velocity.z<0)
59.             {
60.                 rb.AddForce(Vector3.forward * power * 2, ForceMode.Acceleration);
61.             }
62.         }
63.  
64.  
65.  
66.         if(Input.GetKeyDown(KeyCode.F))
67.         {
68.             parkingDrag = !parkingDrag;
69.             if (parkingDrag == true)
70.             {
71.                 rb.drag = 1000;  
72.             }
73.             if (parkingDrag==false)
74.             {
75.                 rb.drag=0.0001f;
76.             }
77.         }
78.  
79.  
80.  
81.     }
82. }
83.  
84.  

 

I always wanted to try this but never did: set the center of mass of your rigidbody below the ground. I’m not sure why you would use hinge btw: not hinje) joints instead of wheel colliders, but moving the center of mass below the ground should work either way.

let me know how it looks and if it works

 

I tryed, and it did balance itself. But it worked only when going straight. If I even slighgtly tryed to change the rotation or oriantation of the bike, it either fall down on the side or glitched in all directions. After some time I found a motorbike controller that satisfied my needs. (You can search motorbike controller by ArcaDone if you want to find it. It's on Github.)

 

Hello, fierarux777
I recently made a simple bike controller. In this controller the balance of the bike is achieved solely by changing the steering angle. No extra forces.
Project link: https://github.com/V-Kudryashov/BikeBalance
Video:

 

Is there a way to modify the angle of the front fork

 

I am going to do it this way:
The axis of the collider remains vertical. For visual objects, I will add a separate axis. This axis will be inclined. The visible wheel will move along the inclined axis in such a way as to remain on the same height as the collider. In this case, the wheel will move slightly back and forth relative to the collider.

I will do it in another project. The BikeBalance project is only physics.

 

I made a fork.

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5. public class FrontForkVisualizer : MonoBehaviour
6. {
7.     public WheelCollider frontCollider;
8.     public Transform physicalWheel;
9.     public Transform fork;
10.     public Transform axis;
11.     public Transform wheel;
12.  
13.     private Quaternion startingForkRotation;
14.     void Start()
15.     {
16.         startingForkRotation = fork.rotation;
17.     }
18.  
19.     void Update()
20.     {
21.         fork.localRotation = startingForkRotation;
22.         fork.Rotate(Vector3.up, frontCollider.steerAngle, Space.Self);
23.  
24.         frontCollider.GetWorldPose(out Vector3 pos, out Quaternion rot);
25.  
26.         Vector3 diff = frontCollider.transform.InverseTransformVector(pos - axis.position);
27.         float cos = Vector3.Dot(frontCollider.transform.up, fork.up);
28.         axis.Translate(0, diff.y / cos, 0, Space.Self);
29.  
30.         physicalWheel.rotation = rot;
31.         wheel.localRotation = physicalWheel.localRotation;
32.  
33.         // We need to turn the wheel a little more to simulate rolling during the wheelbase change.
34.         float targetPos = -frontCollider.suspensionDistance * frontCollider.suspensionSpring.targetPosition;
35.         float currentPos = frontCollider.transform.InverseTransformPoint(pos).y;
36.         float tan = Mathf.Sqrt(1 - cos * cos) / cos;
37.         float HorizontalOffset = (currentPos - targetPos) * tan;
38.         float rotAngle = -HorizontalOffset / frontCollider.radius * Mathf.Rad2Deg;
39.         wheel.Rotate(Vector3.right, rotAngle, Space.Self);
40.     }
41. }
42.  

Video:
https://drive.google.com/file/d/11f1rKp8De21W9JNhkzBaK1lLOvakUlVt/view?usp=sharing