Unity GameObject and Controls - Android Game Development

GameObjects

Every object in your game is a game object. It can be accessed from the tool bar by clicking game object, click on others and select your desire game object. A default game object include

1.      Particle System

2.      Camera

3.      GUI Text

4.      GUI Texture

5.      3D Text

6.      Directional Light

7.      Point Light

8.      Spot Light

9.      Area Light

10.  Cube

11.  Sphere

12.  Capsule

13.  Cylinder

14.  Plane

15.  Quad

16.  Sprite

17.  Cloth

18.  Audio Reverb Zone

19.  Terrain

20.  Ragdoll

21.  Tree

22.  Wind Zone

Game objects come to play when components are added to it. You can add components to the selected game objects through the components menu located at the tool bar. An alternatively approach in adding a components is from the inspector view.

1.      Click on the game object in the hierarchy view

2.      Click on add component in the inspector view

3.      Navigate to the component or simply using the search box to find your component

4.      Select your component

Note: The behavior of game objects is controlled by the components that are attached to them.

When you create a script and attach it to a game object, the script appears in the game objects inspector just like a component. This is because script becomes components when they are saved. A script compiles as a type of component and is treated like any other component by the unity engine. Therefore, a script is a component that you are creating yourself. A game object can only have one tag assigned to it. A tag is a word which you link to one or more game objects. More about tag will be discuss in another lesson.

When you select a game object in the hierarchy or scene view, the inspector will show the properties of all components and materials on that object and allow you to edit them.

To create an empty game object, click on game object, click on create empty.

Here is an example of using C# script

void Start () {

for(int y = 0; y<5; y++){

for(int x = 0; x<5; x++){

GameObject cube = GameObject.createPrimitive(PrimitiveType.cube);

cube.AddComponent<Rigidbody>();

cube.transform.position = new Vector3(x, y, 0);

}

}

            }

Click and drag it to the empty game object. You have successfully created a cube using script

Controls

The tool bar contains the transform tools which include your mouse to scroll to the hand tool and click on it or you simply press Q on your Keyboard. You can easily click on the scene and you will be able to drag the camera.

Experiment 1:

 1. Click on the hand tool or alternatively press Q

2. Double click on the scene to drag the camera

Experiment2:

1.      Click on the hand tool or press Q on the keyboard

2.      Click alt + double click on the scene to orbit around the camera

Experiment3:

1.      Press Q on the keyboard

2.      Click alt + right click + scroll down to zoom in with your mouse and scroll up to zoom out using your mouse.

Zooming in, out, left and right using your Keyboard

Click and hold the right mouse button

1.      Click W to zoom in

2.      Click S to zoom out

3.      Click E to zoom up

4.      Click Q to zoom down

5.      Click D to move right

6.      Click A to move left

To move faster hold down shift. See you in the next tutorial