How to Creating a Unity 2D Game with Random Falling for Any Aspect Ratio

 

Introduction:

In this tutorial, we'll walk through the process of creating a Unity 2D game where boxes fall from random positions on the screen, regardless of the device's aspect ratio. We'll provide a step-by-step guide and explain the key script components.

Step 1: Setting Up the Unity Project

• Create a new 2D Unity project if you haven't already.
• Import any assets you need for your game, such as sprites for the boxes.

Step 2: Designing the Scene

• Create a new 2D scene.
• Design the visual elements of your game, including the background and any other game objects you want.

Step 3: Creating the Box Prefab

• Create a new empty GameObject in your scene.
• Attach a 2D Sprite Renderer component to it and assign the box sprite.
• Create a prefab from this GameObject by dragging it into your Assets folder.

Step 4: Writing the GameManager Script

• Create a new C# script named GameManager.
• Open the script and modify it as follows:

using UnityEngine;

public class GameManager : MonoBehaviour

{

    public GameObject boxPrefab;

    public float spawnRate;

    private bool gameStarted = false;

    private void Update()

    {

        if (Input.GetMouseButtonDown(0) && !gameStarted)

        {

            StartSpawning();

            gameStarted = true;

        }

    }

    private void StartSpawning()

    {

        InvokeRepeating("SpawnBox", 0.5f, spawnRate);

    }

    private void SpawnBox()

    {

        // Get the screen dimensions

        float screenWidth = Screen.width;

        float screenHeight = Screen.height;

        // Calculate random x and y positions within the screen boundaries

        float randomX = Random.Range(0f, screenWidth);

        float randomY = screenHeight + 1f; // Spawn the box just above the screen

        Vector3 spawnPos = Camera.main.ScreenToWorldPoint(new Vector3(randomX, randomY, 10f));

        Instantiate(boxPrefab, spawnPos, Quaternion.identity);

    }

}

Step 5: Setting Up the Scene

• Create a new empty GameObject in your scene and name it "GameManager."
• Attach the GameManager script to the "GameManager" GameObject.
• Assign the Box Prefab and Spawn Rate values in the Inspector.

Step 6: Build and Run

• Build your game for your target platform (e.g., Android).
• Run the game on a device or emulator.

Conclusion: 

You've successfully created a Unity 2D game where boxes fall from random positions on the screen, adapting to any aspect ratio. This tutorial covered the setup, script, and key components necessary to achieve this effect. You can further enhance your game by adding gameplay mechanics, sound, and more visual elements.

⭐Happy coding⭐