Unity Script Reference – MonoBehaviour

MonoBehaviour Inherits from Behaviour

MonoBehaviour is the base class every script derives from.

Using Javascript every script automatically derives from MonoBehaviour. When using C# or Boo you have to explicitly derive from MonoBehaviour.

Note: The checkbox for disabling a MonoBehavior (on the editor) will only prevent Start(), Awake(), Update(), FixedUpdate(), and OnGUI() from executing. If none of these functions are present, the checkbox is not displayed.

See Also: The chapter on scripting in the manual.

Variables

useGUILayout

Disabling this lets you skip the GUI layout phase.

Functions

Invoke	Invokes the method methodName in time seconds.
InvokeRepeating	Invokes the method methodName in time seconds.
CancelInvoke	Cancels all Invoke calls on this MonoBehaviour.
IsInvoking	Is any invoke on methodName pending?
StartCoroutine	Starts a coroutine.
StopCoroutine	Stops all coroutines named methodName running on this behaviour.
StopAllCoroutines	Stops all coroutines running on this behaviour.

Overridable Functions

Update	Update is called every frame, if the MonoBehaviour is enabled.
LateUpdate	LateUpdate is called every frame, if the Behaviour is enabled.
FixedUpdate	This function is called every fixed framerate frame, if the MonoBehaviour is enabled.
Awake	Awake is called when the script instance is being loaded.
Start	Start is called just before any of the Update methods is called the first time.
Reset	Reset to default values.
OnMouseEnter	OnMouseEnter is called when the mouse entered the GUIElement or Collider.
OnMouseOver	OnMouseOver is called every frame while the mouse is over the GUIElement or Collider.
OnMouseExit	OnMouseExit is called when the mouse is not any longer over the GUIElement or Collider.
OnMouseDown	OnMouseDown is called when the user has pressed the mouse button while over the GUIElement or Collider.
OnMouseUp	OnMouseUp is called when the user has released the mouse button.
OnMouseUpAsButton	OnMouseUpAsButton is only called when the mouse is released over the same GUIElement or Collider as it was pressed.
OnMouseDrag	OnMouseDrag is called when the user has clicked on a GUIElement or Collider and is still holding down the mouse.
OnTriggerEnter	OnTriggerEnter is called when the Collider other enters the trigger.
OnTriggerExit	OnTriggerExit is called when the Collider other has stopped touching the trigger.
OnTriggerStay	OnTriggerStay is called once per frame for every Collider other that is touching the trigger.
OnCollisionEnter	OnCollisionEnter is called when this collider/rigidbody has begun touching another rigidbody/collider.
OnCollisionExit	OnCollisionExit is called when this collider/rigidbody has stopped touching another rigidbody/collider.
OnCollisionStay	OnCollisionStay is called once per frame for every collider/rigidbody that is touching rigidbody/collider.
OnControllerColliderHit	OnControllerColliderHit is called when the controller hits a collider while performing a Move.
OnJointBreak	Called when a joint attached to the same game object broke.
OnParticleCollision	OnParticleCollision is called when a particle hits a collider (legacy particle system only).
OnBecameVisible	OnBecameVisible is called when the renderer became visible by any camera.
OnBecameInvisible	OnBecameInvisible is called when the renderer is no longer visible by any camera.
OnLevelWasLoaded	This function is called after a new level was loaded.
OnEnable	This function is called when the object becomes enabled and active.
OnDisable	This function is called when the behaviour becomes disabled () or inactive.
OnDestroy	This function is called when the MonoBehaviour will be destroyed.
OnPreCull	OnPreCull is called before a camera culls the scene.
OnPreRender	OnPreRender is called before a camera starts rendering the scene.
OnPostRender	OnPostRender is called after a camera finished rendering the scene.
OnRenderObject	OnRenderObject is called after camera has rendered the scene.
OnWillRenderObject	OnWillRenderObject is called once for each camera if the object is visible.
OnGUI	OnGUI is called for rendering and handling GUI events.
OnRenderImage	OnRenderImage is called after all rendering is complete to render image
OnDrawGizmosSelected	Implement this OnDrawGizmosSelected if you want to draw gizmos only if the object is selected.
OnDrawGizmos	Implement this OnDrawGizmos if you want to draw gizmos that are also pickable and always drawn.
OnApplicationPause	Sent to all game objects when the player pauses.
OnApplicationFocus	Sent to all game objects when the player gets or looses focus.
OnApplicationQuit	Sent to all game objects before the application is quit.
OnPlayerConnected	Called on the server whenever a new player has successfully connected.
OnServerInitialized	Called on the server whenever a Network.InitializeServer was invoked and has completed.
OnConnectedToServer	Called on the client when you have successfully connected to a server
OnPlayerDisconnected	Called on the server whenever a player disconnected from the server.
OnDisconnectedFromServer	Called on the client when the connection was lost or you disconnected from the server.
OnFailedToConnect	Called on the client when a connection attempt fails for some reason.
OnFailedToConnectToMasterServer	Called on clients or servers when there is a problem connecting to the MasterServer.
OnMasterServerEvent	Called on clients or servers when reporting events from the MasterServer.
OnNetworkInstantiate	Called on objects which have been network instantiated with Network.Instantiate
OnSerializeNetworkView	Used to customize synchronization of variables in a script watched by a network view.
OnAudioFilterRead	If OnAudioFilterRead is implemented, Unity will insert a custom filter into the audio DSP chain.
OnAnimatorMove	Callback for processing animation movements for modifying root motion.
OnAnimatorIK	Callback for setting up animation IK (inverse kinematics)

Class Functions

Logs message to the Unity Console. This function is identical to Debug.Log.

Inherited members

Inherited Variables

enabled	Enabled Behaviours are Updated, disabled Behaviours are not.
transform	The Transform attached to this GameObject (null if there is none attached).
rigidbody	The Rigidbody attached to this GameObject (null if there is none attached).
camera	The Camera attached to this GameObject (null if there is none attached).
light	The Light attached to this GameObject (null if there is none attached).
animation	The Animation attached to this GameObject (null if there is none attached).
constantForce	The ConstantForce attached to this GameObject (null if there is none attached).
renderer	The Renderer attached to this GameObject (null if there is none attached).
audio	The AudioSource attached to this GameObject (null if there is none attached).
guiText	The GUIText attached to this GameObject (null if there is none attached).
networkView	The NetworkView attached to this GameObject (Read Only). (null if there is none attached)
guiTexture	The GUITexture attached to this GameObject (Read Only). (null if there is none attached)
collider	The Collider attached to this GameObject (null if there is none attached).
hingeJoint	The HingeJoint attached to this GameObject (null if there is none attached).
particleEmitter	The ParticleEmitter attached to this GameObject (null if there is none attached).
particleSystem	The ParticleSystem attached to this GameObject (null if there is none attached).
gameObject	The game object this component is attached to. A component is always attached to a game object.
tag	The tag of this game object.
name	The name of the object.
hideFlags	Should the object be hidden, saved with the scene or modifiable by the user?

Inherited Functions

GetComponent	Returns the component of Type type if the game object has one attached, null if it doesn't.
GetComponentInChildren	Returns the component of Type type in the GameObject or any of its children using depth first search.
GetComponentsInChildren	Returns all components of Type type in the GameObject or any of its children.
GetComponents	Returns all components of Type type in the GameObject.
CompareTag	Is this game object tagged tag?
SendMessageUpwards	Calls the method named methodName on every MonoBehaviour in this game object and on every ancestor of the behaviour
SendMessage	Calls the method named methodName on every MonoBehaviour in this game object.
BroadcastMessage	Calls the method named methodName on every MonoBehaviour in this game object or any of its children.
GetInstanceID	Returns the instance id of the object.
ToString	Returns the name of the game object.

Inherited Class Functions

operator bool	Does the object exist?
Instantiate	Clones the object original and returns the clone.
Destroy	Removes a gameobject, component or asset.
DestroyImmediate	Destroys the object obj immediately. It is strongly recommended to use Destroy instead.
FindObjectsOfType	Returns a list of all active loaded objects of Type type.
FindObjectOfType	Returns the first active loaded object of Type type.
operator ==	Compares if two objects refer to the same
operator !=	Compares if two objects refer to a different object
DontDestroyOnLoad	Makes the object target not be destroyed automatically when loading a new scene.