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How to create a simple 3D game with Unity3D
Unity3D is a powerful and popular game engine that allows you to create games for various platforms, such as Windows, Mac, iOS, Android, and more. In this article, we will learn how to create a simple 3D game with Unity3D, using basic concepts such as scenes, game objects, components, scripts, and prefabs.
Step 1: Create a new project
To start a new project with Unity3D, open the Unity Hub and click on the New button. Give your project a name and select the 3D template. You can also choose a location for your project and change other settings if you want. Then click on Create to create your project.
Step 2: Add a plane and a cube
Once your project is created, you will see the Unity Editor with an empty scene. A scene is where you place all the game objects that make up your game. A game object is anything that can be seen or interacted with in your game, such as characters, enemies, items, lights, cameras, etc. A game object can have multiple components attached to it, which define its appearance and behavior. For example, a mesh renderer component displays a 3D model on the screen, a collider component detects collisions with other objects, and a script component executes custom code.
To add a plane and a cube to your scene, go to the Hierarchy window, which shows all the game objects in your scene. Right-click on an empty space and select 3D Object > Plane. This will create a plane game object with a mesh renderer and a collider component. You can use the Transform tool to move, rotate, and scale the plane as you wish. You can also change its color by selecting it and going to the Inspector window, which shows all the components and properties of the selected game object. Click on the color picker next to the Albedo property and choose a color for your plane.
To add a cube to your scene, right-click on an empty space in the Hierarchy window and select 3D Object > Cube. This will create a cube game object with a mesh renderer and a collider component. You can use the Transform tool to move, rotate, and scale the cube as you wish. You can also change its color by selecting it and going to the Inspector window. Click on the color picker next to the Albedo property and choose a color for your cube.
Step 3: Add a camera and a directional light
To see your game in action, you need a camera and a light source. Unity3D automatically creates a camera and a directional light for you when you create a new scene. You can find them in the Hierarchy window under the name Main Camera and Directional Light. You can use the Transform tool to move, rotate, and scale them as you wish. You can also change their properties by selecting them and going to the Inspector window.
The camera is responsible for rendering what the player sees on the screen. You can change its position, rotation, field of view, clipping planes, background color, etc. The directional light is responsible for illuminating your scene with parallel rays of light. You can change its color, intensity, shadows, etc.
Step 4: Add a script to move the cube
To make your game interactive, you need to add some logic to your game objects. This can be done by attaching scripts to them. A script is a piece of code that defines how a game object behaves in response to events such as user input, collisions, triggers, etc.
To add a script to move the cube with the arrow keys, right-click on an empty space in the Project window, which shows all the assets in your project folder. Select Create > C# Script. Give your script a name such as CubeController. This will create a C# script file with some default code.
Double-click on the script file to open it in Visual Studio or another
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