Nebula Posts - Answer Overflow

Nebula

•Created by Nebula on 3/23/2025 in #help

Native AoT dependency issues

I'm not familiar with how any of these concepts work - I just found a library called NPlug (for developing VSTs using C#), and it uses PublishAot to compile. When I try to add any dependencies, like SkiaSharp or OpenTK, the vst can't find the dlls. I managed to brute force it for SkiaSharp like this:

NativeLibrary.SetDllImportResolver(typeof(SkiaSharp.SKImage).Assembly, (libraryName, assembly, searchPath) =>
{
    if (libraryName == "libSkiaSharp")
    {
        return NativeLibrary.Load(skiaSharpLocation);
    }
    return IntPtr.Zero;
});

NativeLibrary.SetDllImportResolver(typeof(SkiaSharp.SKImage).Assembly, (libraryName, assembly, searchPath) =>
{
    if (libraryName == "libSkiaSharp")
    {
        return NativeLibrary.Load(skiaSharpLocation);
    }
    return IntPtr.Zero;
});

But openTK prints (when making a gamewindow):

Error: System.TypeInitializationException: A type initializer threw an exception. To determine which type, inspect the InnerException's StackTrace property.
 ---> System.NullReferenceException: Object reference not set to an instance of an object.
   at OpenTK.Windowing.Desktop.GLFWProvider.EnsureInitialized() + 0xbe
   ...4

Error: System.TypeInitializationException: A type initializer threw an exception. To determine which type, inspect the InnerException's StackTrace property.
 ---> System.NullReferenceException: Object reference not set to an instance of an object.
   at OpenTK.Windowing.Desktop.GLFWProvider.EnsureInitialized() + 0xbe
   ...4

I tried setting the dll resolver for GLFWProvider to point to glfw3.dll , but that didn't work. I have selfcontained enabled, and I'm publishing via:

dotnet publish -c Release -r win-x64 -p:PublishAot=true

dotnet publish -c Release -r win-x64 -p:PublishAot=true

This produces the binaries for SkiaSharp, glfw, and ManagedBass. The vst3 can't see these dlls, and I'm wondering if there's a way to package the binaries together. Sorry if this is missing anything, I'm not really sure on how this all works.

2 replies

CC#

•Created by Nebula on 3/16/2025 in #help

Property setter disappears on `PublishTrimmed`

After publishing my program, the setter to a float property disappears and cannot be found by .GetProperty when using <PublishTrimmed>. The code that accesses the property:

public TransformSequence<T> Create<X>(string property, X to, float duration, Easing easing, string? name, Func<X, X, float, X> interpolation) {
    PropertyInfo? propertyInfo = typeof(T).GetProperty(property);
    if (propertyInfo == null) throw new InvalidOperationException($"Property {property} does not exist in {typeof(T).Name}");

    X a = FutureData.TryGetValue(property, out object? value) ? (X)value : (X)propertyInfo.GetValue(Target)!;

    Transform transform = new(t => {
        X value = interpolation(a, to, t);
        propertyInfo.SetValue(Target, value);
    }) {
        Name = name ?? property,
        Duration = duration,
        Easing = EasingHelper.FromEaseType(easing)
    };

    FutureData[property] = to!;
    if (Name == string.Empty) Name = property;

    return Append(transform);
}

public TransformSequence<T> Create<X>(string property, X to, float duration, Easing easing, string? name, Func<X, X, float, X> interpolation) {
    PropertyInfo? propertyInfo = typeof(T).GetProperty(property);
    if (propertyInfo == null) throw new InvalidOperationException($"Property {property} does not exist in {typeof(T).Name}");

    X a = FutureData.TryGetValue(property, out object? value) ? (X)value : (X)propertyInfo.GetValue(Target)!;

    Transform transform = new(t => {
        X value = interpolation(a, to, t);
        propertyInfo.SetValue(Target, value);
    }) {
        Name = name ?? property,
        Duration = duration,
        Easing = EasingHelper.FromEaseType(easing)
    };

    FutureData[property] = to!;
    if (Name == string.Empty) Name = property;

    return Append(transform);
}

The Rotation property:

public float Rotation {
    get => _rotation;
    set {
        if (_rotation == value) return;

        _rotation = value % 360;
        Invalidate(Invalidation.Geometry);

        // Rotation currently does not affect ChildRelativeSizeAxes
        // if (Parent?.ChildRelativeSizeAxes != Axes.None) InvalidateParent(Invalidation.DrawSize);
    }
}

public float Rotation {
    get => _rotation;
    set {
        if (_rotation == value) return;

        _rotation = value % 360;
        Invalidate(Invalidation.Geometry);

        // Rotation currently does not affect ChildRelativeSizeAxes
        // if (Parent?.ChildRelativeSizeAxes != Axes.None) InvalidateParent(Invalidation.DrawSize);
    }
}

This Scale property works fine, on the other hand:

public Vector2 Scale {
    get => _scale;
    set {
        if (_scale == value) return;

        _scale = Vector2.Max(value, new(float.MinValue));
        Invalidate(Invalidation.DrawSize);
        Parent?.Invalidate(Invalidation.Layout);
    }
}

public Vector2 Scale {
    get => _scale;
    set {
        if (_scale == value) return;

        _scale = Vector2.Max(value, new(float.MinValue));
        Invalidate(Invalidation.DrawSize);
        Parent?.Invalidate(Invalidation.Layout);
    }
}

All Vector2 types work fine, and Rotation is the only float property I've tried. Is there a way to still use PublishTrimmed while keeping this functionality? It's likely me just misunderstanding how the publish trimmed parameter works.

13 replies

CC#

•Created by Nebula on 3/31/2023 in #help

❔ BPM Clock System

I am in the process of making a program similar to SonicPI, in which will allow me to programmatically make music. I have made the sound and file reading logic, but I am stuck on figuring out how to manage the playback timing (BPM): If the user inputs this, and the BPM is 120: thread () { loop (4) { play(piano.wav, C4, 1); } } thread () { loop (4) { play(click.wav, C4, 2); } } It should play a piano note every beat, and a click sound every second beat. I was originally using Thread.Sleep and a few calculations, but it is very out of sync when threads are brought into the mix. Any help would be brilliant 😄

6 replies

CC#

•Created by Nebula on 9/1/2022 in #help

Capturing keystroke signals

Hiya, I am looking for a way to catch the SIGTSTP signal triggered by CTRL+Z in a net6.0 console application. I can catch CTRL+C with Console.CancelKeyPress, but CTRL+Z and CTRL+\ I am unsure.

1 replies

Gaming

Programming