Creating a Shop System in Unity and C#

Creating a shop system in Unity can be a great way to add a new dimension to your game. In this lesson, we will walk through the process of creating a simple shop system using Unity and C#.

Step 1: Start by creating a new Unity project and adding a new empty GameObject to your scene. This will serve as the base for your shop system.

Step 2: Create a new C# script and attach it to the GameObject you just created. This script will be used to handle all the functionality of the shop.

Step 3: In the script, start by creating a public class called "ShopItem" that will contain information about each item in the shop, such as its name, price, and description.

public class ShopItem

{

    public string itemName;

    public int price;

    public string description;

}

Step 4: Next, create a public class called "Shop" that will contain a list of ShopItem objects and a method for displaying the shop. The display method should iterate through the list of items and display their name, price, and description on the screen.

public class Shop

{

    public List<ShopItem> items;

    public void DisplayShop()

    {

        foreach (ShopItem item in items)

        {

            Debug.Log("Item: " + item.itemName + " Price: " + item.price + " Description: " + item.description);

        }

    }

}

Step 5: In the Update method of the script, you can add code to check for player input to open and close the shop. You can also add code to handle purchasing items, such as deducting the item's price from the player's currency and adding the item to the player's inventory.

void Update()

{

    if(Input.GetKeyDown(KeyCode.O))

    {

        DisplayShop();

    }

    if(Input.GetKeyDown(KeyCode.P))

    {

        PurchaseItem(items[0]);

    }

}

void PurchaseItem(ShopItem item)

{

    Debug.Log("Purchasing: " + item.itemName);

    // Deduct item price from player's currency

    // Add item to player's inventory

}

Step 6: In order to test your shop, you will need to create some items to add to the shop. You can do this by creating new GameObjects and attaching the "ShopItem" script to them. Be sure to set the item's name, price, and description in the inspector.

Step 7: To add items to your shop, simply add them to the list of items in the Shop class. You can also set the items' prices and descriptions.

Shop shop;

void Start()

{

    shop = new Shop();

    shop.items = new List<ShopItem>();

    shop.items.Add(new ShopItem(){itemName = "Item 1", price = 10, description = "This is a sample item"});

    shop.items.Add(new ShopItem(){itemName = "Item 2", price = 20, description = "This is another sample item"});

}

Step 8: Now, you can add a GUI element like button or text on your canvas and make it interactable to open the shop when the player clicks on it.