Allow your player to harvest natural resources (e.g. chop wood) using the Event System.

The Event System and Object Game Variables can be used to create regrowing resources like wood or wheat. In this tutorial we’ll create an event that allows us to chop wood on a regular basis. For this we’ll:

• adda new item
• create a harvest event
• add the event to a scene

Let’s get to it!

Adding the resource item

First, we’ll add the item that will be havested – in our case that’ll be Wood. Open the ORK Framework editor, navigate to Inventory > Items, add a new item and change the following settings.

Item Settings

Price Settings

Use Settings

And that’s it for the new item – click on Save Settings to save the changes.

The harvest event

Navigate to Events and click on New Game Event to create a new event. We’ll handle everything in this event, but you can optionally also use the Event Interaction to check for the game variable conditions that need to be valid to harvest wood. We’ll use Object game variables in order to allow using the same event on different trees (game objects), otherwise all trees would have the same timeout to prevent harvesting.

Event Settings

Click on Add Actor to add an actor.

Click on Add Actor again.

Check Game Variable

Add > Value > Variable > Check Game Variable

First, we’ll check if the player can harvest wood here. We’re using Object game variables (i.e. the variable will be bound to one object) to check a timeout – if enough time passed since the last harvest, the object can be harvested again.

Click on Add Game Variable to add a variable condition.

Show Dialogue (Failed)

Add > UI > Dialogue > Show Dialogue

This step is connected to the Check Game Variable step’s Failed slot.

Show Dialogue (Success)

Add > UI > Dialogue > Show Dialogue

This step is connected to the Check Game Variable step’s Success slot.

Click on Add Choice to add the first choice.

Click on Add Choice again to add the 2nd choice.

Add To Inventory

Add > Combatant > Inventory > Add To Inventory

This step is connected to the Yes slot of the choice dialogue.

Change Game Variable

Add > Value > Variable > Change Game Variable

Finally, we’ll set the object game variable on the event object. We’ll set the variable we used in the initial check to the current game time plus a minute as an offset.

Click on Add Game Variable to add a variable change.

And that’s it for the event – click on Save Event and save it as harvestWood in Assets/Events/.

Adding the event to a scene

Open the town scene (1 Town, can be found in Assets/Tutorial Resources/Scenes/). Create a new empty game object using the Unity® menu: Game Object > Create Empty

We’ll add several components to the new game object – change the following settings.

Transform

Capsule Collider

Event Interaction

You can either use the usual component menu to add it or use the ORK Scene Wizard.

Click on Ok to use the selected event.

Object Variables Component

This component is required to use object game variables. It will automatically create a unique Object ID to identify the object’s variables. All objects that share the same ID will also share the same variables. There are no further settings needed here.

And that’s it – don’t forget to save the scene.

Now you’ll be able to harvest wood in the town’s center tree – and it regrows a minute after harvesting it.

Tip: Animating the harvest