< home < toolbox

Unity

Recommended Courses:

• C# Programming for Unity Game Development
• Game Design and Development
• Virtual Reality

---

---

Ordered by first to last method to execute.

private void Awake() {  } // Called when the script is being loaded
private void OnEnable() {  } // Called every time the object is enabled
private void Start() {  } // Called on the frame when the script is enabled 
private void Update() {  } // Called once per frame
private void LateUpdate() {  } // Called every frame after Update
private void OnBecameVisible() {  } // Called when the renderer is visible by any Camera
private void OnBecameInvisible() {  } // Called when the renderer is no longer visible by any Camera
private void OnDrawGizmos() {  } // Allows you to draw Gizmos in the Scene View
private void OnGUI() {  } // Called multiple times per frame in response to GUI events
private void OnApplicationPause() {  } // Called at the end of a frame when a pause is detected
private void OnDisable() {  } // Called every time the object is disabled
private void OnDestroy() {  } // Only called on previously active GameObjects that have been destroyed

Physics updates on a Fixed Timestep are defined under Edit ▸ Project Settings ▸ Time ▸ Fixed Timestep and may execute more or less than once per actual frame.

private void FixedUpdate() {  } // Called every Fixed Timestep

// Create a GameObject 
Instantiate(GameObject prefab);
Instantiate(GameObject prefab, Transform parent);
Instantiate(GameObject prefab, Vector3 position, Quaternion rotation);
// In Practice 
Instantiate(bullet);
Instantiate(bullet, bulletSpawn.transform);
Instantiate(bullet, Vector3.zero, Quaternion.identity);
Instantiate(bullet, new Vector3(0, 0, 10), bullet.transform.rotation);

// Destroy a GameObject 
Destroy(gameObject);

// Finding GameObjects 
GameObject myObj = GameObject.Find("NAME IN HIERARCHY");
GameObject myObj = GameObject.FindWithTag("TAG");

// Accessing Components 
Example myComponent = GetComponent<Example>();
AudioSource audioSource = GetComponent<AudioSource>();
Rigidbody rgbd = GetComponent<Rigidbody>();

• X = Left/Right
• Y = Up/Down
• Z = Forward/Back

Vector3.right /* (1, 0, 0) */   Vector2.right /* (1, 0) */
Vector3.left /* (-1, 0, 0) */   Vector2.left /* (-1, 0) */
Vector3.up /* (0, 1, 0) */      Vector2.up /* (0, 1) */
Vector3.down /* (0, -1, 0) */   Vector2.down /* (0, -1) */
Vector3.forward /* (0, 0, 1) */
Vector3.back /* (0, 0, -1) */
Vector3.zero /* (0, 0, 0) */    Vector2.zero /* (0, 0) */
Vector3.one /* (1, 1, 1) */     Vector2.one /* (1, 1) */
float length = myVector.magnitude // Length of this Vector
myVector.normalized // Keeps direction, but reduces length to

// The time in seconds since the start of the game
float timeSinceStartOfGame = Time.time;

// The scale at which the time is passing
float currentTimeScale = Time.timeScale;
// Pause time
Time.timeScale = 0;

// The time in seconds it took to complete the last frame
// Use with Update() and LateUpdate()
float timePassedSinceLastFrame = Time.deltaTime;

// The interval in seconds at which physics and fixed frame rate updates are performed
// Use with FixedUpdate()
float physicsInterval =  Time.fixedDeltaTime;

// Both objects have to have a Collider and one object has to have a Rigidbody for these Events to work 
private void OnCollisionEnter(Collision hit) { Debug.Log(gameObject.name + " just hit " + hit.gameObject.name); }
private void OnCollisionStay(Collision hit) { Debug.Log(gameObject.name + " is hitting " + hit.gameObject.name); }
private void OnCollisionExit(Collision hit) { Debug.Log(gameObject.name + " stopped hitting " + hit.gameObject.name); }

// Trigger must be checked on one of the Colliders
private void OnTriggerEnter(Collider hit) { Debug.Log(gameObject.name + " just hit " + hit.name); }
private void OnTriggerStay(Collider hit) { Debug.Log(gameObject.name + " is hitting " + hit.name); }
private void OnTriggerExit(Collider hit) { Debug.Log(gameObject.name + " stopped hitting " + hit.name); }
 
// For 2D Colliders just add 2D to the Method name and the Parameter Type 
private void OnCollisionEnter2D(Collision2D hit) { }
private void OnCollisionStay2D(Collision2D hit) { }
private void OnCollisionExit2D(Collision2D hit) { }
private void OnTriggerEnter2D(Collider2D hit) { }
private void OnTriggerStay2D(Collider2D hit) { }
private void OnTriggerExit2D(Collider2D hit) { }

/* Create a Coroutine */
private IEnumerator CountSeconds(int count = 10)
{
  for (int i = 0; i <= count; i++) {
    Debug.Log(i + " second(s) have passed");
    yield return new WaitForSeconds(1.0f);
  }
}

/* Call a Coroutine */
StartCoroutine(CountSeconds());
StartCoroutine(CountSeconds(10));

/* Call a Coroutine that may need to be stopped */
StartCoroutine("CountSeconds");
StartCoroutine("CountSeconds", 10);

/* Stop a Coroutine */
StopCoroutine("CountSeconds");
StopAllCoroutines();

/* Store and call a Coroutine from a variable */
private IEnumerator countSecondsCoroutine;

countSecondsCoroutine = CountSeconds();
StartCoroutine(countSecondsCoroutine);

/* Stop a stored Coroutine */
StopCoroutine(countSecondsCoroutine);

/* Coroutine Return Types */
yield return null; // Waits until the next Update() call
yield return new WaitForFixedUpdate(); // Waits until the next FixedUpdate() call
yield return new WaitForEndOfFrame(); // Waits until everything this frame has executed
yield return new WaitForSeconds(float seconds); // Waits for game time in seconds
yield return new WaitUntil(() => MY_CONDITION); // Waits until a custom condition is met
yield return new WWW("MY/WEB/REQUEST"); // Waits for a web request
yield return StartCoroutine("MY_COROUTINE"); // Waits until another Coroutine is completed

if (Input.GetKeyDown(KeyCode.Space)) { Debug.Log("Space key was Pressed"); }
if (Input.GetKeyUp(KeyCode.W)) { Debug.Log("W key was Released"); }
if (Input.GetKey(KeyCode.UpArrow)) { Debug.Log("Up Arrow key is being held down"); }

/* Button Input located under Edit >> Project Settings >> Input */
if (Input.GetButtonDown("ButtonName")) { Debug.Log("Button was pressed"); }
if (Input.GetButtonUp("ButtonName")) { Debug.Log("Button was released"); }
if (Input.GetButton("ButtonName")) { Debug.Log("Button is being held down"); }

Hotkeys

Pan Tool	Move Tool	Rotate Tool	Scale Tool	Rect Tool
Q	W	E	R	T
New empty game object	New child game object	Vertex Snap	Toggle Window Size	Duplicate
Ctrl/Cmd+Shift+N	Alt-Shift+N	Hold Ctrl/Cmd+Shift+V	Shift+Space	Ctrl/Cmd+D
Play	Pause	Step	Focus on Game Object
Ctrl/Cmd+P	Ctrl/Cmd+Shift+P	Ctrl/Cmd+Alt+P	Select Object ▸ Shift+F
Undo	Redo (PC)	Redo (Mac)
Ctrl/Cmd+Z	Ctrl+Y	Cmd+Shift+Z

 

 

 

---

Move along; nothing to see here…