Acceleration improved

Assets/Scripts/CameraOrbit.cs

@@ -0,0 +1,83 @@
+using System;
+using UnityEngine;
+
+namespace TDLN.CameraControllers
+{
+    public class CameraOrbit : MonoBehaviour
+    {
+        public GameObject target;
+        public float distance = 10.0f;
+
+        public float xSpeed = 250.0f;
+        public float ySpeed = 120.0f;
+
+        public float yMinLimit = -20;
+        public float yMaxLimit = 80;
+
+        float x = 0.0f;
+        float y = 0.0f;
+
+        void Start()
+        {
+            var angles = transform.eulerAngles;
+            x = angles.y;
+            y = angles.x;
+        }
+
+        float prevDistance;
+
+        void LateUpdate()
+        {
+            if (distance < 2) distance = 2;
+            distance -= Input.GetAxis("Mouse ScrollWheel") * 2;
+            if (target && (Input.GetMouseButton(0) || Input.GetMouseButton(1)))
+            {
+                var pos = Input.mousePosition;
+                var dpiScale = 1f;
+                if (Screen.dpi < 1) dpiScale = 1;
+                if (Screen.dpi < 200) dpiScale = 1;
+                else dpiScale = Screen.dpi / 200f;
+
+                if (pos.x < 380 * dpiScale && Screen.height - pos.y < 250 * dpiScale) return;
+
+                // comment out these two lines if you don't want to hide mouse curser or you have a UI button 
+                Cursor.visible = false;
+                Cursor.lockState = CursorLockMode.Locked;
+
+                x += Input.GetAxis("Mouse X") * xSpeed * 0.02f;
+                y -= Input.GetAxis("Mouse Y") * ySpeed * 0.02f;
+
+                y = ClampAngle(y, yMinLimit, yMaxLimit);
+                var rotation = Quaternion.Euler(y, x, 0);
+                var position = rotation * new Vector3(0.0f, 0.0f, -distance) + target.transform.position;
+                transform.rotation = rotation;
+                transform.position = position;
+
+            }
+            else
+            {
+                // comment out these two lines if you don't want to hide mouse curser or you have a UI button 
+                Cursor.visible = true;
+                Cursor.lockState = CursorLockMode.None;
+            }
+
+            if (Math.Abs(prevDistance - distance) > 0.001f)
+            {
+                prevDistance = distance;
+                var rot = Quaternion.Euler(y, x, 0);
+                var po = rot * new Vector3(0.0f, 0.0f, -distance) + target.transform.position;
+                transform.rotation = rot;
+                transform.position = po;
+            }
+        }
+
+        static float ClampAngle(float angle, float min, float max)
+        {
+            if (angle < -360)
+                angle += 360;
+            if (angle > 360)
+                angle -= 360;
+            return Mathf.Clamp(angle, min, max);
+        }
+    }
+}

Assets/Scripts/CameraOrbit.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: e745887670e904825b07e4a8da7c38e6
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/Scripts/CarController.cs

@@ -4,21 +4,36 @@ using UnityEngine;
 
 public class CarController : MonoBehaviour
 {
-    public Wheel[] wheels;
+    public Wheel[] turningWheels;
+    public Wheel[] drivingWheels;
     public Rigidbody rb;
+    public float TopSpeed = 10;
+    
+    public AnimationCurve PowerCurve;
+    public float EnginePower = 5;
 
     void Awake(){
-        foreach(Wheel wheel in wheels){
+        foreach(Wheel wheel in turningWheels){
             wheel.myCar= this;
         }
+
+        foreach(Wheel wheel in drivingWheels){
+            wheel.myCar= this;
         }
-    void Start()
-    {
+        
 
     }
 
-    // Update is called once per frame
     void FixedUpdate()
     {
+            //up or down
+            foreach(Wheel wheel in drivingWheels){
+                wheel.Rotate(Input.GetAxis("Vertical"));
+            }
+        
+
+        foreach(Wheel wheel in turningWheels){
+            wheel.Steer(Input.GetAxis("Horizontal"));
+        }
     }
 }

Assets/Scripts/Wheel.cs

@@ -9,6 +9,9 @@ public class Wheel : MonoBehaviour
     public float restPosition;
     public float restPositionOffset;
     public float springConstant = 1f;
+    public float tireGripFactor =1f;
+    public float tireMass = 1f;
+    public float steerAngle = 25;
     public float dampningFactor = 1f;
     public float velocity;
     // public ForceMode springForceMode;
@@ -18,6 +21,7 @@ public class Wheel : MonoBehaviour
     public float curDisplacement => restPosition - transform.localPosition.y;
     public float topMaxDisplacement => restPosition + displacementRange;
     public float botMaxDisplacement => restPosition - displacementRange;
+    public float bottomEnd => transform.position.y - radius;
     LayerMask groundMask;
 
     public CarController myCar;
@@ -30,17 +34,18 @@ public class Wheel : MonoBehaviour
     }
     public float rayDist ;
     // Update is called once per frame
+    bool grounded = false;
     void FixedUpdate()
     {
         if (myCar == null) { return; }
 
         RaycastHit hit = new RaycastHit();
         float newDisplacement = transform.localPosition.y;
-        float bottomEnd = transform.position.y - radius;
+        
         Vector3 topEnd = transform.position + new Vector3(0, radius, 0);
 
-        bool grounded = false;
-        if (Physics.Linecast(suspensionJoint.position, suspensionJoint.position - new Vector3(0,((radius*2)+(displacementRange))), out hit, groundMask))
+        grounded=false;
+        if (Physics.Linecast(suspensionJoint.position, suspensionJoint.position -(transform.up * ((radius*2)+(displacementRange))), out hit, groundMask))
         {
             Debug.DrawLine(suspensionJoint.position, hit.point, Color.red);
             hitPoint = hit.point.y;
@@ -49,17 +54,51 @@ public class Wheel : MonoBehaviour
             CurDisplacement = restPositionOffset - rayDist;
             velocity = Vector3.Dot(transform.up, myCar.rb.GetPointVelocity(transform.position));
             force = (CurDisplacement * springConstant) - (velocity * dampningFactor);
-            myCar.rb.AddForceAtPosition(Vector3.up * force, transform.position);
+            myCar.rb.AddForceAtPosition(transform.up * force, transform.position);
             grounded = true;
+            Friction();
         }
         else
         {
-            // transform.localPosition = Vector3.Lerp(transform.position, 
-            // new Vector3(transform.localPosition.x, botMaxDisplacement, transform.localPosition.z),0.2f);
+            transform.localPosition = Vector3.Lerp(transform.localPosition, 
+            new Vector3(transform.localPosition.x, botMaxDisplacement, transform.localPosition.z),0.2f);
         }
 
         // transform.localPosition = new Vector3(transform.localPosition.x, transform.localPosition.y + velocity, transform.localPosition.z);        
     }
+
+    public void Rotate(float input){
+        if(grounded ){
+            if(input >0){
+
+            }
+            Vector3 accelDir = transform.forward;
+
+            float carSpeed = Vector3.Dot(myCar.transform.forward, myCar.rb.velocity);
+            float normalizedSpeed= Mathf.Clamp01(Mathf.Abs(carSpeed) / myCar.TopSpeed);
+            float availableTorque = myCar.PowerCurve.Evaluate(normalizedSpeed) * input * myCar.EnginePower;
+            
+            myCar.rb.AddForceAtPosition(accelDir * availableTorque, transform.position);
+        }
+    }
+
+    void Friction(){
+        if(grounded){
+            Vector3 steeringDir = transform.right;
+            Vector3 tireWorldVel = myCar.rb.GetPointVelocity(transform.position);
+            float steeringVel = Vector3.Dot(steeringDir, tireWorldVel);
+            float desiredVelChange = -steeringVel * tireGripFactor;
+            float desiredAccel = desiredVelChange / Time.fixedDeltaTime;
+            Vector3 friction = steeringDir * tireMass * desiredAccel;
+            // friction = new Vector3(friction.x, 0, friction.z);
+            myCar.rb.AddForceAtPosition(friction, transform.position);
+        }
+    }
+
+    public void Steer(float input){
+        transform.localEulerAngles = new Vector3(transform.localEulerAngles.x, input * steerAngle, transform.localEulerAngles.z);
+    }
+
     public float force;
     void OnDrawGizmos()
     {

ProjectSettings/ProjectVersion.txt

@@ -1,2 +1,2 @@
-m_EditorVersion: 2020.3.40f1
-m_EditorVersionWithRevision: 2020.3.40f1 (ba48d4efcef1)
+m_EditorVersion: 2020.3.34f1
+m_EditorVersionWithRevision: 2020.3.34f1 (9a4c9c70452b)