#28 I created a crumbling floor script that uses the onTriggerEnter2d,onTriggerStay2d, and onTriggerExit2d to trigger audio and destruction of the platform, simulating the floor has crumbled. The warning audio will play each time you step on the platform and 1 second after the player has collided with the platform then the crumble audio begins and when the audio ends the platform is destroyed. OnTriggerEnter2D often not called I have a lot of collisions in my game and most of them worked well at first. But I'm noticing a lot of incidents now, where either the Player, an enemy or a projectile just moves throught an object without interacting with it. Here's the script of an enemy for example. An OnTriggerEnter2D example is shown. This example has two empty GameObjects, called GameObject1 and GameObject2. These both have script files which makes the example work. The first script, Example1, creates a Sprite and adds a BoxCollider2D and a Rigidbody2D. This object falls under gravity and collides with Example2. Trigger触发，取消所有的物理碰撞，可以在触发时执行OnTrigger事件。 想获得碰撞状态信息，又不想触发物理效果 使用OnTrigger; 至少一方勾选 Ttigger触发器; 运动一方必须含有刚体.

They both look similar and behave similarly, what's then the difference between OnTriggerEnter and OnCollisionEnter? The key to understand this is in knowing what are triggers in Unity.

In Unity, an object might be controlled by the physics engine or by script. If you need to control an object by script but still would like to know if an object touched another, a 'collision' happened, you need to use triggers.

Collision is under quotes because, strictly under Unity's terminology, a collision only happens when object's movements are governed by the physics engine, for the other cases what we have are simply objects touching each other, also, for such event, our script can be alerted as well.

What are triggers

A trigger is a collider that's not influenced by the physics engine. It doesn't respond to forces nor gravity. But they still do have a use for the physics engine, they are used to detect whether an object passed through another. Triggers are everywhere in Unity game development, and in other engines too to be honest.

This Reaper is controlled by a simple back-and-forth walk AI, the physics engine is not used, but we still want to know when it has touched some things in the stage. For that, we can use an OnTriggerEnter

Collisions

A collision is also the result of an object touching another one, but instead of passing through, these objects push each other in a realistic way. Use OnCollisionEnter when your rigidbody colliders aren't triggers and you'd like to know when they touched each other.

Ontriggerenter2d In Unity

For more information on how to create and use triggers, please see the official documentation on the subject. If you followed the documentation and something with your collision detection is not working, you may try to fix it using our comprehensive collision fixing tutorial.

TLDR;

Use triggers if you don't want/need the physics engine to control your object but still need to know if an object passed through another or reached some `zone` within the game. In that case, you'll use OnTriggerEnter().

If your object is indeed controlled by the physics engine, you'll use OnCollisionEnter() to know if an object touched another one.

Ontriggerenter2d

Create Unity classes and methods easily.

Features

All Unity code snippets you need. This extension intends to be the complete collection of Unity snippets for Visual Studio Code.

It takes advantage of latest Visual Studio Code snippets features to create the code faster for you.

Unity Ontriggerenter2d

MonoBehaviour

Create game classes like MonoBehaviours, NetworkBehaviours and StateMachineBehaviours easily. Also create common methods like Start(), Update() or OnTriggerEnter2D() and log calls.

Editor

Create an Editor classes like Editor, EditorWindow and PropertyDrawer as easy as it can be.

ScriptableObject

You never remember the property that goes with the ScriptableObject to create it via Unity create menu? Not a problem.

Instalation

As in any Visual Studio Code Extension you have several options to install:

• Enter the Visual Studio Code Marketplace, search for Unity Code Snippets (or enter directly on the extension page) and click on Install button.
• Inside Visual Studio Code, enter in the Extensios panel, search for Unity Code Snippets and click on Install button
• Run the following command in the Command Palette:

All the snippets

Start typing the names to create the corresponding snippets.

• Game classes:

  • MonoBehaviour
  • StateMachineBehaviour
  • NetworkBehaviour
  • ScriptableObject

• Editor Classes:

  • Editor
  • Editor with Reorderable List(NEW)
  • EditorWindow
  • PropertyDrawer
  • ScriptableWizard

• MonoBehaviour Methods:

  • Awake()
  • FixedUpdate()
  • LateUpdate()
  • OnAnimatorIK()
  • OnAnimatorMove()
  • OnApplicationFocus()
  • OnApplicationPause()
  • OnApplicationQuit()
  • OnAudioFilterRead()
  • OnBecameInvisible()
  • OnBecameVisible()
  • OnCollisionEnter()
  • OnCollisionEnter2D()
  • OnCollisionExit()
  • OnCollisionExit2D()
  • OnCollisionStay()
  • OnCollisionStay2D()
  • OnConnectedToServer()
  • OnControllerColliderHit()
  • OnDestroy()
  • OnDisable()
  • OnDisconnectedFromServer()
  • OnDrawGizmos()
  • OnDrawGizmosSelected()
  • OnEnable()
  • OnFailedToConnect()
  • OnFailedToConnectToMasterServer()
  • OnGUI()
  • OnJointBreak()
  • OnJointBreak2D()
  • OnMasterServerEvent()
  • OnMouseDown()
  • OnMouseDrag()
  • OnMouseEnter()
  • OnMouseExit()
  • OnMouseOver()
  • OnMouseUp()
  • OnMouseUpAsButton()
  • OnNetworkInstantiate()
  • OnParticleCollision()
  • OnParticleTrigger()
  • OnPlayerConnected()
  • OnPlayerDisconnected()
  • OnPostRender()
  • OnPreCull()
  • OnPreRender()
  • OnRenderImage()
  • OnRenderObject()
  • OnSerializeNetworkView()
  • OnServerInitialized()
  • OnTransformChildrenChanged()
  • OnTransformParentChanged()
  • OnTriggerEnter()
  • OnTriggerEnter2D()
  • OnTriggerExit()
  • OnTriggerExit2D()
  • OnTriggerStay()
  • OnTriggerStay2D()
  • OnValidate()
  • OnWillRenderObject()
  • Reset()
  • Start()
  • Update()

• Some useful code snippets:

  • Debug.Log() (type log)
  • Debug.LogError() (type logerror)
  • Debug.LogWarning() (type logwarning)
  • Debug.LogException() (type logexception)

If you have any suggestions, open an issue in the Github project page and I'll add it as soon as I can :).

If you like the color theme of the previews, you can download it here: Base16 Ocean Dark Extended Theme.

Ontriggerenter2d Called Twice

Thanks you for downloading this extension.