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Assets/ShipControls.cs

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+using UnityEngine;
+
+public class ShipControls : MonoBehaviour
+{
+    //Use to switch between Force Modes
+    enum ModeSwitching { Start, Impulse, Acceleration, Force, VelocityChange };
+    ModeSwitching m_ModeSwitching;
+
+    Vector3 m_StartPos, m_StartForce;
+    Vector3 m_NewForce;
+    Rigidbody m_Rigidbody;
+
+    public float m_ForceAmp;
+    public GameObject ship;
+
+    void Start()
+    {
+        //You get the Rigidbody component you attach to the GameObject
+        m_Rigidbody = GetComponent<Rigidbody>();
+
+        //This starts at first mode (nothing happening yet)
+        m_ModeSwitching = ModeSwitching.Start;
+
+        //Initialising the force which is used on GameObject in various ways
+        m_NewForce = new Vector3(-5.0f, 1.0f, 0.0f);
+
+        //The GameObject's starting position and Rigidbody position
+        m_StartPos = transform.position;
+        m_StartForce = m_Rigidbody.transform.position;
+    }
+
+    void FixedUpdate()
+    {
+        //If the current mode is not the starting mode (or the GameObject is not reset), the force can change
+        if (m_ModeSwitching != ModeSwitching.Start)
+        {
+            //The force changes depending what you input into the text fields
+            m_NewForce = ship.transform.forward * m_ForceAmp;
+        }
+
+        //Here, switching modes depend on button presses in the Game mode
+        switch (m_ModeSwitching)
+        {
+            //This is the starting mode which resets the GameObject
+            case ModeSwitching.Start:
+                //This resets the GameObject and Rigidbody to their starting positions
+                transform.position = m_StartPos;
+                m_Rigidbody.transform.position = m_StartForce;
+
+                //This resets the velocity of the Rigidbody
+                m_Rigidbody.velocity = new Vector3(0f, 0f, 0f);
+                break;
+
+            //These are the modes ForceMode can force on a Rigidbody
+            //This is Acceleration mode
+            case ModeSwitching.Acceleration:
+                //Use Acceleration as the force on the Rigidbody
+                m_Rigidbody.AddForce(m_NewForce, ForceMode.Acceleration);
+                break;
+
+            //This is Force Mode, using a continuous force on the Rigidbody considering its mass
+            case ModeSwitching.Force:
+
+                //Use Force as the force on GameObject’s Rigidbody
+                m_Rigidbody.AddForce(m_NewForce, ForceMode.Force);
+                break;
+
+            //This is Impulse Mode, which involves using the Rigidbody’s mass to apply an instant impulse force.
+            case ModeSwitching.Impulse:
+                //Use Impulse as the force on GameObject
+                m_Rigidbody.AddForce(m_NewForce, ForceMode.Impulse);
+                break;
+
+            //This is VelocityChange which involves ignoring the mass of the GameObject and impacting it with a sudden speed change in a direction
+            case ModeSwitching.VelocityChange:
+                //Make a Velocity change on the Rigidbody
+                m_Rigidbody.AddForce(m_NewForce, ForceMode.VelocityChange);
+                break;
+        }
+    }
+
+    //The function outputs buttons, text fields, and other interactable UI elements to the Scene in Game view
+    void OnGUI()
+    {
+        //Press the button to reset the GameObject and Rigidbody
+        if (GUI.Button(new Rect(100, 0, 150, 30), "Reset"))
+        {
+            //This switches to the start/reset case
+            m_ModeSwitching = ModeSwitching.Start;
+        }
+
+        //When you press the Acceleration button, switch to Acceleration mode
+        if (GUI.Button(new Rect(100, 30, 150, 30), "Apply Acceleration"))
+        {
+            //Switch to Acceleration (apply acceleration force to GameObject)
+            m_ModeSwitching = ModeSwitching.Acceleration;
+        }
+
+        //If you press the Impulse button
+        if (GUI.Button(new Rect(100, 60, 150, 30), "Apply Impulse"))
+        {
+            //Switch to impulse (apply impulse forces to GameObject)
+            m_ModeSwitching = ModeSwitching.Impulse;
+        }
+
+        //If you press the Force Button, switch to Force state
+        if (GUI.Button(new Rect(100, 90, 150, 30), "Apply Force"))
+        {
+            //Switch to Force (apply force to GameObject)
+            m_ModeSwitching = ModeSwitching.Force;
+        }
+
+        //Press the button to switch to VelocityChange state
+        if (GUI.Button(new Rect(100, 120, 150, 30), "Apply Velocity Change"))
+        {
+            //Switch to velocity changing
+            m_ModeSwitching = ModeSwitching.VelocityChange;
+        }
+    }
+}