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mirhagk

Wed Nov 17, 2010 3:02 pm


C# inheritance problem

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If I have a class with a static variable, when another class inherits from it, does it get its own copy of it, or use the parent class' variable. Say for instance i have a parent class of enemies, and classes that inherit from it such as zombie, skeleton etc. I only want one copy of the texture for each class, so I want it to be static in all of them, but I need to define it in the parent class so it can use it in a draw method.

So can they each have their own copy of the parent's static variable or does each instance need it's own pointless copy of the same variable?


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TerranceN

Wed Nov 17, 2010 3:44 pm


RE:C# inheritance problem

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The child class will access the parent's static variable.

Every instance is going to have to have a copy of that texture variable, but it is only a pointer, so it's not like it is going to effect performance in any noticeable way.


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mirhagk

Wed Nov 17, 2010 10:11 pm


RE:C# inheritance problem

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I guess... sad face. Maybe I'll store an array of textures and have them each just keep an eight bit unsigned int of which one they are.

Also when inheriting from a class that has a contructor with arguments, how do I pass arguments from the inherited class to the base class


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TerranceN

Thu Nov 18, 2010 3:49 pm


Re: C# inheritance problem

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How is that any better then having each instance have a Texture variable that in the constructor is set to point to the texture you want (It will only point to the texture, not copy it, because in C# all classes are reference types)?

As for the constructor, you can just use : Base() to send values to the parent's constructor. Like this
[code]
class A
{
	int num;

	public A(int newNum)
	{
		num = newNum;
	}
}

class B : A
{
	int num2;

	public B(int newNum, int someOtherNum)
		: base(newNum)
	{
		num2 = someOtherNum;
	}
}
[/code]


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mirhagk

Thu Nov 18, 2010 8:48 pm


RE:C# inheritance problem

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okay thanks. And It's better because it's slightly less memory. And it'll just me annoying copying them all into the variables

but I got it all worked out, it's all good now. plus the array let's the parent function know about all the textures even if child functions don't exist