Polymorphism and GetComponent

Unity Engine
1

Hi

I don’t know if what I’am trying to do is possible : (In C#)

I have a base “Class A” who have a for example a member “Name”.

And I have some derived Class, B, C, D, etc who derive from A.

These script are used on some gameObject in the scene and I want to modify “name” in another script.

So I try to do :

A myAInstance = GetComponent(typeof(A))
myAInstance.name = “bob”;

but unity don’t find the script.
I have to call GetComponent with the good type, apparently I can’t use the base type to do this.

Any Idea ?

Thanks

Jérôme Foucher

2

this will work, i think

Component cs = gameObject.GetComponents(typeof(Component)) as Component[];

MyClass mc;

foreach(Component c in cs){
	if(c is MyClass){
		 mc = c as MyClass ;
		break;
	}
}
3

I have an interface IInfo, which 2 classes implement. I can freely call GetComponent(typeof(IInfo)) and get either of the 2 classes.

So I believe it should work.

4

A is MonoBehaviour or a MonoBehaviour derived class, right? If so, you shouldn’t have a problem and more information (like code) would be needed to determine the problem.

5

Maybe you just subclassed from MonoBehaviour (default code generated by unity) and forgot to change to base type.

6

You replied to a 5 years old thread…

7

@Dantus : If his answer helps some else, so what if he answered a 5 year old post?

8

It is a very vague statement and meanwhile GetComponent changed and e.g. supports interfaces. Not sure how it could be useful.