If you haven’t done so already, please complete the previous tutorial, starting with How to create a 3D Roll a Ball game.

Create the behavior of the Item (yellow cube).

The Item object is prepared as a prefab, and it is assumed that the object will be reused.
Here, we will not use Logic Behavior directly, but rather create a behavior in an asset type called Logic Asset, and reuse the behavior by playing it with Logic Player.

The contents to be created are as follows:

Destroy your object when it comes into contact with the Player using OnTriggerEnter.
Use Logic Asset to create the behavior and reuse the same behavior.
Use Logic Player to play back the behavior.

Creating assets

Creating the Logic folder

Create a folder to save Logic Toolkit related assets.
You can name it anything, but in this example we’ll create a folder called Logic.

Select the Assets/RollABall folder in the Project window
Click the + button
Select Folder from the menu
Change the name to Logic

Creating a Logic Asset

Select the Logic folder in the Project window
Click the + button
Select Logic Toolkit/Logic Asset from the menu
Change the name to Item Logic

Click the Edit button in the Item Logic Inspector to open the Logic Editor window

Editing Item Logic

We will edit the Item Logic in the Logic Editor window.

Creating a PubOnTriggerEnter.Callback node

Contact between the Player and Item is detected by OnTriggerEnter, so the event is executed via a component for passing the OnTriggerEnter message included in the Logic Toolkit.

Click on the graph to focus
Press the Space key to open the node creation menu
Select the Members tab
Enter OnTriggerEnter Callback in the search field
Select LogicToolkit.Builtin.Messages.PubOnTriggerEnter Callback from the list
Select Event from the node type selection menu
Confirm the node name with the Enter key

The components in the LogicToolkit.Builtin.Messages namespace are pre-packaged with the Logic Toolkit to accept Event nodes when a MonoBehavior message is called.
In this example, they are used to accept the OnTriggerEnter(Collider) message in the Event node.

Editing the PubOnTriggerEnter.Callback node

Check Require in the Target field

The field for setting a component also has a function to add and then retrieve the corresponding component if it is not present in the target object.
Since Require is checked this time, the PubOnTriggerEnter component will be added at runtime even if it has not been added to the object itself (Item).

Depending on the purpose of the object, the processing load of adding components each time may become a problem.
It is a good idea to consider in advance whether or not to add components to an object.

Creating a Component.CompareTag node

It determines whether the person in contact is a Player by comparing with the Player tag.

Drag and drop the output port of the Arg 0 field of the PubOnCollisionEnter.Callback node to the right side (where you want to create the destination node) and open the node creation menu.
Select the Members tab.
Select Component/CompareTag(string tag) from the list.
Select Compute from the node type selection menu.
Confirm the node name with the Enter key.

Editing the Component.CompareTag node

Set the Tag field string to Player

Creating a Branch Node

The node to be executed will be branched depending on the result of the CompareTag comparison.

Drag and drop the Component.CompareTag node to the right side of the output port in the Result field (where you want to create the destination node) and open the node creation menu.
Select the Scripts tab.
Select Flow Controls/Branch from the list.

Connecting to a Branch node

Drag and drop the execution port of the PubOnTriggerEnter.Callback node to the input port of the Branch node to connect it.

Creating a GameObject.Destroy node

Drag and drop the True port of the Branch node to the right side (where you want to create the destination node) and open the node creation menu.
Select the Scripts tab.
Enter Destroy in the search field.
Select GameObject.Destroy(gameObject) (Action) from the list.
Confirm the node name with the Enter key.

Unity’s Destroy method is Object.Destroy(Object), but it is more convenient to be able to specify your own objects, so we have included a script that performs GameObject.Destroy(GameObject).