How to use multiple classes in C#?

chrisbck

I have been experimenting with C# in Godot for the first time. All has been going well until I hit this issue. It should be an easy fix but I cant find a solution.

I'm just trying to print a simple message from the constructor when a 2nd class is instantiated.

Gist here

I get the error at build: "The type or namespace name 'OtherClass' could not be found (are you missing a using directive or an assembly reference?)"

Anybody put me out my misery?

chrisbck

Actually i'll post the code here as well. This script added to main node of scene:

using Godot;
using System;


public class Main : Node
{
    public override void _Ready()
    {
        OtherClass ot = new OtherClass();
    }
}

This script is saved in root folder of project, same as Main.cs:

using System;
using Godot;

public class OtherClass
{
    public OtherClass()
    {
        GD.Print("OtherClass created...");
    }
}

Megalomaniak

@chrisbck said: Gist here

by simply pasting the gist link it will get embedded:

https://gist.github.com/chrisbck/07e671e47f040098fd7a0848b39802b2

chrisbck

Thanks Megalomaniak, that is good to know.

I have found a workaround to the problem. Putting the OtherClass into the Main.cs file works:

using Godot;
using System;

public class Main : Node
{
    public override void _Ready()
    {
        GD.Print("Hello from C#");
        OtherClass ot = new OtherClass();
    }
}

public class OtherClass
{
    public OtherClass()
    {
        GD.Print("Hello from OtherClass");
    }
}

This is not ideal but it'll do for now until I can find how to reference a class from another file.

DeepLearning

Try to inherit your OtherClass from a node : public class OtherClass : Node

chrisbck

I did try that, unfortunately it doesn't work for me either. Still stuck with this one I'm afraid.

Vale-git

Did you checked the .cspoj file? Maybe is a silly question :)

chrisbck

It's not a silly question because I not entirely sure what I am doing lol.

I had checked .csproj but could not find a reference to 'OtherClass'. As i am still getting familiar with C# in Godot, I wasn't sure if it should be referenced there as the namespace may sort that out. I am used to using C# in visual studio and having VS look after everything for me.

Do I have to manually enter any referenced classes in the .proj file?

Vale-git

Yes. The compiler must know all classes and where they are in order to be able to compile them. the .csprj is the setup for the compiler :)

In my project I have something like this:

 <ItemGroup>
    <Compile Include="addons\EditorSettings\plugin.cs" />
    <Compile Include="assets\resources\Bot.cs" />
.... other classes ....
</ItemGroup>

I guess you have to add your class there too. :)

robbertzzz

You should always create your C# scripts from the godot editor to prevent this from happening. The csproj file gets automatically updated if you do it that way. I have seen a request of using a more updated csproj format on the godot github which doesn't require you to have every file listed in the csproj, so who knows, might become part of future godot!

Vale-git

@robbertzzz said: You should always create your C# scripts from the godot editor to prevent this from happening. The csproj file gets automatically updated if you do it that way.

It work if you add a new file, But if you try to move it or to delete it godot doesn't update the csprj file automatically. For now - until it will be fixed - you have to check it every time you will get that specific error. :)

chrisbck

Yes. That got it! Thank you @Vale-git, it's a relief to get this solved.

That's good info to know too @robbertzzz , I just naturally added a new class in the IDE i was using without giving it thought. It's good to learn a bit more about the .csproj file and understand how it's all glued together. I guess that's the downside to being babysat by your IDE.

Thanks for your help guys!