How components are created in C#

Hi, only a curiosity about how things works in Unity... When I add a component named "airplane", for example, and insert two scripts ("Move1" and "Move2", for example) and a Rigidbody2D, I have at least three classes...
The object created when I start the game is an instance (named "airplane") of a class (Airplane) that inherit all this three classes (Move1, Move2 and Rigidbody2D)?
Or it is a intance "airplane" that has three object of the classes Move1, Move2 and Rigidbody2D? I don`t think so, since "this" inside Move1 or Move2 seems to return things of Airplane. By the other way, when I use getComponent I can get instances of Move1, Move2 or Rigidbody2D already created... wow... So they are components inside my class Airplane? I didn`t get this yet.
Someone can help?
Thanks.

 

A class that inherits from MonoBehaviour is a component, and most scripts in Unity have a class that inherits from MonoBehaviour. Thus, the situation you describe probably means 4 components attached to one object: Airplane, Move1, Move2, and Rigidbody2D. Probably; your use of "insert two scripts" is a little vague, so I don't know what "inserts" means to you.

Also, bear in mind that a GameObject is basically just a list of components attached to it. That might help clarify things for you, that everything is simply attached to one game object, but they are all still separate classes.

 

GameObjects are containers that hold Components. GameObjects can't hold other GameObjects and Components can't have their own Components. Anything you can add to a GameObject has to have inherited from Component at some point (eg MonoBehaviour inherits from Behaviour and Behaviour inherits from Component).

https://docs.unity3d.com/ScriptReference/GameObject.html
https://docs.unity3d.com/ScriptReference/Component.html

Components listed in the Inspector are showing the order that they were added to the GameObject.

https://docs.unity3d.com/Manual/UsingTheInspector.html

Components do have a method called GetComponent, but that's just a shortcut for accessing the GetComponent method of the GameObject. Every Component has a property (linked below) for accessing the GameObject it is attached to and when you use GetComponent it's going through that property.

https://docs.unity3d.com/ScriptReference/Component-gameObject.html

 

Hi @zemmac Wellcome to this forum.
I was looking that you have done the same question here:

https://forum.unity.com/threads/how-are-components-created-in-c.535412/#post-3527168

Making a component is easy, did you take a look at this video tutorials?
https://unity3d.com/learn/tutorials/s/scripting
https://unity3d.com/learn/tutorials/topics/scripting/scripting-primer-and-qa?playlist=17117

You do not need to use inheritance at the beginning. You can just use a class that derives from mono like the default c# script and use getComponent to access another game object variables.
You can create a game object name it "Manager" and in it components that "Moves" 1 & 2 the aeroplanes. Follow first the tutorials