OBJECT PICKUP WITH ONTRIGGERENTER-In this video I show you how you can use the function OnTriggerEnter to pickup objects from the ground. Objectives: Introduce Unity’s basic audio components/settings Construct a simple C# script to play a sound when two objects collide To begin, open a new unity project. For this tutorial we will be using 2018.3, but everything we’re doing here will work with most versions of Unity. Unity - OnTriggerEnter is not being called. Ask Question Asked 3 years. But the OnTriggerEnter function doesn't work even if objects enter the trigger.
This exercise shows you how you can teleport a character within a scene in Unity 3D using a simple C# script.
- Set up a simple scene and add either a FirstPersonController or a ThirdPersonController to it. In this example I’m going to be using a ThirdPersonController.
- We will need to download the Standard Assets package from the Asset Store which includes the Character Prefabs.
Drag and drop the ThirdPerson Controller prefab from Assets on to the scene.
Make sure to attach the Main Camera to the ThirdPersonController so that the camera follows the character around in Play mode.
We are going to create a teleportation pad in the scene. For this we’re going to add a cylinder to the plane floor and flatten it using the Scale Tool. You can use the Scale Tool to adjust the dimensions of any game object.
We’re also going to need to define where the player will teleport to. Here we’ll make the player teleport to the top of the tall blue cube. To do so, we’re going to add a plane on the top of the cube which will function as the teleportation target.
- Writing the Teleportation C# Script:
Create a new C# Script in Assets.
We will need to write a very simple C# script for the teleportation. What the script does is that when the player collides with the trigger, which in this case will be the teleportation pad, it switches the position of the player to the designated location which is the Teleport Target.
Once the script is saved, we will return to the scene and drag and drop the C# script from Assets to the yellow cylinder which is going to work as the teleportation trigger.
- In the cylinder’s Inspector, we will need to make the following changes,
- Enable “Is Trigger”
- In the Teleport Script section, drag and drop the plane (which is on top of the cube) to “Teleport Target”
- Also drag and drop the ThirdPersonController to “The Player”
Make sure that “Auto Sync Transforms” in the Physics section of Project Settings (which can be accessed from Edit) is enabled. If this is not enabled, you’ll find that when your character gets to the Teleport Pad, you’ll be able to see the Teleport Target for a split second but your character will not change position.
Now you should be all set to teleport your character from one place to another within a scene! Enter Play mode and when your character walks on to the Teleport Pad…
It will appear at the Teleport Target at the top of the blue pillar!
Sources:
Teleporting Tutorial This quick tutorial gives you the basics of teleporting in Unity 3D as well as an explanation for the C# script.
This section explains how to make things happen in the Dialogue System.
Note: If you are making a 2D project, see Enable Physics2D Support in Unity 2018+.
The Dialogue System Trigger component has three main parts:
- Trigger: The event that causes the Dialogue System Trigger to fire.
- Conditions: States that must be true for the Dialogue System Trigger to perform its actions.
- Actions: Things the Trigger should do, such as starting conversations or setting quest states.
Trigger
You can set the Trigger dropdown to these values:
| Trigger | Description |
|---|---|
| On Use | The player’s Selector or Proximity Selector sent an OnUse message to the GameObject, or the Dialogue System Trigger’s OnUse() method was called manually in a UnityEvent or script. |
| On Start | The component started (e.g., at scene start). |
| On Enable | The component was enabled. |
| On Disable | The component was disabled. |
| On Destroy | The component was destroyed. |
| On Trigger Enter | The component received an OnTriggerEnter message. To use this trigger, the component’s GameObject should have a trigger collider. You may want to set Conditions → Accepted Tags to restrict this trigger to GameObjects with specific tags such as Player. |
| On Trigger Exit | The component received an OnTriggerExit message. |
| On Collision Enter | The component received an OnCollisionEnter message. |
| On Collision Exit | The component received an OnCollisionExit message. |
| On Bark Start | The GameObject started playing a bark (one-off line of dialogue). |
| On Bark End | The GameObject finished playing a bark. |
| On Conversation Start | The GameObject just started as a primary participant in a conversation. |
| On Conversation End | The GameObject just ended a conversation. |
| On Sequence Start | The GameObject just started as a primary participant in a cutscene sequence. This event is not called for in-conversation sequences unless you’ve ticked the Dialogue Manager’s Subtitle Settings → Inform Sequence Start And End checkbox. |
| On Sequence End | The GameObject just ended a sequence. |
Conditions
Conditions allow you to specify states that must be true for the Dialogue System Trigger to fire, including:
| Condition Type | Description |
|---|---|
| Lua Conditions | Lua expressions such as checking the value of a variable. |
| Quest Conditions | Required quest states. |
| Accepted Tags | For OnCollision and OnTrigger events, the other GameObject must have one of these tags. If Accepted Tags is empty, all GameObjects are allowed. |
| Accepted GameObjects | For OnCollision and OnTrigger events, the other GameObject must be in this list. If Accepted GameObjects is empty, all GameObjects are allowed. |
Actions
To add actions to perfom, click the Add Action button. You can add these actions:
| Action | Description |
|---|---|
| Set Quest State | Sets quest and/or quest entry states. (See Quests.) |
| Run Lua Code | Runs Lua expressions. Lua Variable['Actor'] and Variable['ActorIndex'] are set to the interactor's info. (See Logic & Lua.) |
| Play Sequence | Plays a cutscene sequence. Sequence speaker is set to the interactor's info. (See Cutscene Sequences) |
| Show Alert | Shows an alert message through the dialogue UI. |
| Send Messages | Uses Unity’s SendMessage() method to send messages to targets. |
| Bark | Plays a bark (one-off line of dialogue) on a GameObject. |
| Start Conversation | Starts a conversation. |
| Set GameObjects Active/Inactive | Works on entire GameObjects. |
| Set Components Enabled/Disabled | Works on specific components of a GameObject. |
| Set Animator States | Sets animator states on GameObjects. Useful to idle characters when conversations start. |
| OnExecute() UnityEvent | Allows you to specify other actions using a UnityEvent. |
Character GameObject Assignments
Note: Actor GameObjects used in runtime conversations don't have to be the same as the actors assigned to the conversation in your dialogue database! See below for an explanation.
Conversation Actor & Conversant
When you create a conversation in the Dialogue Editor, you'll assign an actor and a conversant from the dialogue database's list of actors. Typically, the actor is the player and the conversant is the primary NPC involved in the conversation. To view or change the conversation's actor and conversant, click on empty canvas space to inspect the conversation's properties.
Dialogue Entry Node Actor & Conversant
As you add dialogue entry nodes, the editor will automatically assign an actor and conversant to the node. The node's actor is the character who is speaking. The node's conversant is the character being spoken to. To change a node's actor or conversant, click on the node to inspect its properties.
Dialogue System Trigger Actor & Conversant
When you set up a Dialogue System Trigger, you can assign GameObjects to the Start Conversation > Conversation Actor and Conversation Conversant fields. These GameObjects can represent different actors than those assigned to the conversation in your dialogue database.
The conversation will use these GameObjects even if they don't match the actors assigned to the conversation. This allows you to reuse conversations for different characters – for example, reusing the same shopkeeper conversation for all shopkeepers in your game world. (Tip: In your dialogue database, you can create a generic actor named 'Shopkeeper' with a generic conversation such as: 'Hello, I'm [var=Conversant]. Welcome to my shop!' etc. Then reuse the same shopkeeper conversation for each village's shopkeeper and simply assign the specific village shopkeeper to the Conversation Conversant field.)
Conversation Actor
If you don't assign the Conversation Actor field, the Dialogue System Trigger will try to choose an appropriate GameObject:
- If the trigger type is OnTriggerEnter/Exit or OnCollisionEnter/Exit, it will use the GameObject that collided with the trigger.
- If the trigger type is OnUse, it will use the GameObject that sent the 'OnUse' message, typically the GameObject with a Selector or Proximity Selector component.
- Otherwise it will look for a GameObject that has a Dialogue Actor component whose actor dropdown matches the conversation's actor. Failing that, it will look for a GameObject whose name matches the conversation's actor.
Conversation Conversant
If you don't assign the Conversation Conversant field, the Dialogue System Trigger will generally try to choose an appropriate GameObject:
- It will look for a GameObject that has a Dialogue Actor component whose actor dropdown matches the conversation's conversant.
- Failing that, it will use the Dialogue System Trigger GameObject.
Other Participants
If a dialogue entry node is assigned to an actor that is not the conversation's primary actor or conversant, it will look for a GameObject that has a Dialogue Actor component whose actor dropdown matches the node's actor. Failing that, it will look for a GameObject whose name matches the node's actor.
Bark On Idle
Use Bark On Idle to play barks on a GameObject at a random frequency between Min Seconds and Max Seconds. See the Barks section for more information about barks.
Range Trigger
Use Range Trigger to activate GameObjects and enable components OnTriggerEnter when specified Conditions are met. When OnTriggerExit occurs, the GameObjects are deactivated and components disabled. This component is useful to enable components such as Bark On Idle only when the player enters a trigger collider that represents proximity to the barker. You can also configure UnityEvents to run on enter and exit.
Trigger Event, Collision Event, Timed Event
The Trigger Event, Collision Event, and Timed Event components are general-purpose components that run UnityEvents on trigger collisions, regular physics collisions, and elapsed durations, respectively.
The Dialogue System Events component runs UnityEvents when Dialogue System activity occurs. Each foldout has a section of events that the component can handle when its GameObject receives the corresponding message, such as OnConversationStart. Note that many events, such as OnConversationStart, are only called on the two primary participants and the Dialogue Manager. If you want to run an event regardless of who the participants are, put the Dialogue System Events component on the Dialogue Manager.
You can also handle events in your own scripts by adding special methods described Scripting.
The Dialogue System provides an optional interaction system that can interact with GameObjects (e.g., NPCs) that have Usable components. You can add one of two components to the player:
Selector
The Selector component detects Usables by raycasting from a specified position, such as the mouse position or center of screen. When the player presses the use button, it sends an OnUse Message to the Usable. Note: In 2D mode, the camera must be orthographic.
Proximity Selector
The Proximity Selector component detects Usables when entering trigger colliders. When the player presses the use button, it sends an OnUse Message to the Usable.
OnUse Message
When the player targets a Usable and presses the Use Key or Use Button, the Selector will send an OnUse(Transform player) message to the usable GameObject. The Dialogue System's triggers, such as Dialogue System Trigger, respond to this message. Your own scripts can also respond to this message by adding an OnUse method such as:
Trigger 2d Unity
Usables also have UnityEvents that run when selected, deselected, and used. You can configure these events in the inspector.
Interactive conversations usually have a back-and-forth flow, where the actor says a line, then the conversant says a line, and so on. Barks, on the other hand, are one-off lines of dialogue that don't involve a player response menu or any back-and-forth. They're typically spoken by an NPC for atmosphere (e.g., 'Nice weather today') or to give the player an idea of the NPC's internal state (e.g., 'Reloading. Cover me!'). The content of barks can come from text strings or conversations.
Bark Conversations
Unity On Trigger Enter Multiple Colliders
To create a bark conversation, add all bark entries as children of the START node. In other words, the conversation tree will only be one level deep. When an actor barks, the Dialogue System will evaluate all children of the START node to generate a list of currently-valid entries. It will then choose an entry from this list and bark it. By setting Conditions on the bark conversation's dialogue entries, barks can be aware of the current game state. For example, an NPC could bark different things based on its health level.
Unity On Trigger Enter 2d Not Working
Bark Priority
You can specify priority levels on your bark entries to prevent lower-priority entries from interrupting higher ones. To do this, add a custom Number field named 'Priority' to your dialogue entry. Higher values have higher priority. If you don't want to have to add this custom field on each entry, you can add it to the template on the Dialogue Editor Templates Tab. If the dialogue entry doesn't have a custom field named 'Priority', it uses a default of 0. When a bark is triggered, if the NPC is already barking, the Dialogue System will only interrupt it to play the new bark if the new bark's Priority is greater than or equal to the current bark's Priority.
Bark Display
Barks don't use the dialogue UI. Instead, barks are played through a bark UI on the barker, which usually appears as text over the NPC's head and/or as audio played through the NPC's audio source. The Dialogue UIs section covers bark UIs.
Bark Groups
If you want only one barker in a group to show bark text at time, configure them as Bark Group Members by adding a Bark Group Member component to each. When one member of the group barks, the others will hide any active barks to reduce onscreen clutter.
If you tick a Bark Group Member's Queue Barks checkbox, then when another member is currently barking, it will queue its bark to play after the other member instead of playing immediately and hiding the other member's bark.
The Dialogue System supports 2D physics as well as 3D physics. In Unity 2018+, the 2D physics package (Physics2D) can be enabled or disabled, so the Dialogue System's code for Unity 2018+ doesn't assume that Physics2D is available in your project. To tell the Dialogue System that Physics2D is available if you’re using Unity 2018+, open the Welcome Window (Tools → Pixel Crushers → Dialogue System → Welcome Window) and tick Enable 2D Physics or select menu item Tools → Pixel Crushers → Common → Misc → Enable Physics2D Support.... If you're using Unity 2017 or older, this menu item will not be visible.
If you want to enable Physics2D support manually instead, select menu item Edit → Settings → Player, add the scripting symbol USE_PHYSICS2D as shown below:
If you're having trouble getting the Selector component to detect your 2D Usables, please see Why isn't 2D detection working?.
If you’re using Unity 2017 or older, you can skip this step.
Collider Trigger Unity
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