Interface
*********

.. note:: An **Asset** corresponds to any file or resource that is used in your project: 3D models, 2D sprite, audio file, script, shader, texture, animation.



Main windows
============

Standard Layout
---------------

	* In the Unity HUB, select the blank project, it will automatically open in the Unity Editor.
   
	* Identify the main windows of the Unity Editor:

	.. image:: scene.png	
		:scale: 70%

	* On the upper left, the **Hierarchy window** displays all the **objects** in the current scene
	* In the center, the **Scene** view allows us to edit and modify the current scene
	* On the right, the **Inspector** window lists all the information of the current selected object
	* At the bottom, in the **Project** window, you can find all the assets of the project displayed in two modes: on the left as a tree structure and on the right as a thumbnail view..



Restoring the Interface
-----------------------

While working in the interface, accidents may happen, such as closing an important window or panels disappearing.
To solve such an issue, you can use the Unity **Layout** manager to reset windows and panels to their original positions.

	* Extend, move and close some windows randomly

	* In the top right corner of the Unity main window, find the hidden dropdown button
	
	.. image:: layout.png
		:scale: 60%
	
	* Click on this button and select "Default"

			
Project/Assets windows
======================	


Starting a New Scene	 
--------------------

	.. warning:: Unity developers generally create a separate folder for each type of element: a folder named Scripts for all the game's scripts, a folder named Textures for all textures, and so on. For our needs, it is simpler to create one folder per project and store all the project assets within it.
	
	* In the Project window, select the folder named **Assets > Scenes**
	
	.. image:: psce.png
		:scale: 50%
	
	* In the Assets window, in an empty area of the thumbnail view, right click  to open the context menu
	
	.. image:: createFolder.png
		:scale: 50%
	
	* Select Create > folder

	* Name this	folder *Intro*  
	
	.. image:: intro.png
		:scale: 35%
	
	* Double-click on the *Intro* folder to open it
	
	.. image:: empty.png
		:scale: 45%
	
	* Right click to open the context menu
	
		* Select Create > Scene > Scene
		* Name it: *IntroScene*
		
		
	.. image:: introscene.png
		:scale: 45%
		 
	* Double click on the scene icon to open it
	
	* In the Hierarchy window, check that the name at the top of the hierarchy matches the name of your file:
	
	.. image:: hierar.png
		:scale: 45%
  

 



Hierarchy window
================


Creating objets
---------------

Basic 3D objects can be created through this window:


	* In the Hierarchy window, right click in an empty area to open the context menu
	
	.. image:: create3D.png
		:scale: 50%
		
	* Select *3D object > Cube*
	
	
	* In the assets window, select the folder Assets > SolidColorMaterials
	
	* Choose a color
	
	* Drag and drop this material onto the cube in the 3D scene
	
	.. image:: apply.gif
		:scale: 80%


Hierarchy window
----------------


		.. image:: cube.png
			:scale: 60%
	
	* Notice that the cube has been added to the tree
	* Select this item in the Hierarchy
	* Press F2 and rename the object to "MyCube"

	

Inspector
=========

In the Unity engine, an object in the scene is called a **GameObject**. It is described as a list of components such as Transforms, Renderers, Colliders, and Scripts, which together define its behavior and appearance in the game.

	* Select "MyCube" in the Hierarchy window
  
	
The Inspector windows is organized as a stack of dropdown boxes, thus you can find:
		
	* At the top:
	
		.. image:: ins1.png
			:scale: 50%

		* The name of the object: "MyCube"
		* A checkbox to enable or disable the object in the scene
			
			* Check and uncheck the checkbox to disable and reactivate the cube
			
		* A tag: using this tag, you can gather objects by category, like enemy or walls, for example
		
	* Transform
	
		.. image:: transform.png
			:scale: 50%
	
		* A transformation matrix that defines the translation, rotation and scale values relative to the parent object
	
	* Mesh filter: defines the 3D geometry

	* Mesh renderer: rendering information like material, shadows...
		
	* Collider: a geometric object that encloses the object and that is used to detect collisions with other objects while minimizing computations