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jnm2jnm2
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Add 360 degree node viewer
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12 files changed

+758
-11
lines changed

12 files changed

+758
-11
lines changed

‎MystIVAssetExplorer/Extensions.cs‎

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using System;
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using System.Collections.Generic;
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using System.Diagnostics.CodeAnalysis;
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using System.Linq;
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namespace MystIVAssetExplorer;
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internal static class Extensions
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{
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public static bool TrySingle<T>(this IEnumerable<T> source, [MaybeNullWhen(false)] out T single)
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{
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using var enumerator = source.GetEnumerator();
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if (enumerator.MoveNext())
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{
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var current = enumerator.Current;
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if (!enumerator.MoveNext())
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{
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single = current;
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return true;
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}
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}
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single = default;
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return false;
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}
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public static bool TrySingle<T>(this IEnumerable<T> source, Func<T, bool> predicate, [MaybeNullWhen(false)] out T single)
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{
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return source.Where(predicate).TrySingle(out single);
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}
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}

‎MystIVAssetExplorer/Formats/ZapImage.cs‎

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using MystIVAssetExplorer.Memory;
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using System;
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namespace MystIVAssetExplorer.Formats;
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public sealed class ZapImage
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{
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public required int Width { get; init; }
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public required int Height { get; init; }
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public required ReadOnlyMemory<byte> RgbChannels { get; init; }
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public required ReadOnlyMemory<byte> AlphaChannel { get; init; }
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public static ZapImage Parse(ReadOnlyMemory<byte> zapFileData)
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{
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var reader = new SpanReader(zapFileData.Span);
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if (reader.ReadUInt32LittleEndian() != 32) throw new NotImplementedException();
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if (reader.ReadUInt32LittleEndian() != 2) throw new NotImplementedException();
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if (reader.ReadUInt32LittleEndian() != 10) throw new NotImplementedException();
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if (reader.ReadUInt32LittleEndian() != 10) throw new NotImplementedException();
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var dataLength1 = reader.ReadInt32LittleEndian();
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var dataLength2 = reader.ReadInt32LittleEndian();
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var width = reader.ReadInt32LittleEndian();
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var height = reader.ReadInt32LittleEndian();
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var position = zapFileData.Length - reader.Span.Length;
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var image1 = zapFileData.Slice(position, dataLength1);
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position += dataLength1;
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var image2 = zapFileData.Slice(position, dataLength2);
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position += dataLength2;
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if (position != zapFileData.Length)
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throw new NotImplementedException();
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return new ZapImage { Width = width, Height = height, RgbChannels = image1, AlphaChannel = image2 };
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}
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}

‎MystIVAssetExplorer/ILease.cs‎

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using System;
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namespace MystIVAssetExplorer;
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public interface ILease<out T> : IDisposable
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{
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T LeasedInstance { get; }
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}

‎MystIVAssetExplorer/MystIVAssetExplorer.csproj‎

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<PackageReference Include="Avalonia.Controls.DataGrid" Version="$(AvaloniaVersion)" />
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<PackageReference Include="Avalonia.Fonts.Inter" Version="$(AvaloniaVersion)" />
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<PackageReference Include="Avalonia.ReactiveUI" Version="$(AvaloniaVersion)" />
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<PackageReference Include="Avalonia.Skia" Version="$(AvaloniaVersion)" />
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<PackageReference Include="FluentIcons.Avalonia" Version="1.1.303" />
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<!--Condition below is needed to remove Avalonia.Diagnostics package from build output in Release configuration.-->
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<PackageReference Condition="'$(Configuration)' == 'Debug'" Include="Avalonia.Diagnostics" Version="$(AvaloniaVersion)" />

‎MystIVAssetExplorer/ReferenceCountedDisposable.cs‎

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using System;
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using System.Threading;
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namespace MystIVAssetExplorer;
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public sealed class ReferenceCountedDisposable<T> where T : IDisposable
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{
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private readonly object lockObject = new();
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private T? instance;
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private int referenceCount = 1;
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public ReferenceCountedDisposable(T instance, out ILease<T> initialLease)
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{
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this.instance = instance;
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initialLease = new DecrementLease(this);
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}
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public ILease<T>? TryLease()
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{
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lock (lockObject)
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{
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if (referenceCount == 0)
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return null;
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referenceCount++;
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return new DecrementLease(this);
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}
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}
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private void Decrement()
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{
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var shouldDispose = false;
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var instanceToDispose = default(T);
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lock (lockObject)
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{
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if (referenceCount == 0)
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throw new InvalidOperationException("More increments than decrements");
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referenceCount--;
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if (referenceCount == 0)
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{
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shouldDispose = true;
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instanceToDispose = instance;
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instance = default;
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}
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}
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if (shouldDispose)
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instanceToDispose!.Dispose();
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}
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private sealed class DecrementLease(ReferenceCountedDisposable<T> owner) : ILease<T>
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{
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private ReferenceCountedDisposable<T>? owner = owner;
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public T LeasedInstance => (Volatile.Read(ref owner) ?? throw new ObjectDisposedException(nameof(ILease<>))).instance!;
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public void Dispose() => Interlocked.Exchange(ref owner, null)?.Decrement();
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}
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}

‎MystIVAssetExplorer/Skybox/SkyboxControl.BoxModelDrawOperation.cs‎

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using Avalonia;
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using Avalonia.Media;
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using Avalonia.Platform;
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using Avalonia.Rendering.SceneGraph;
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using Avalonia.Skia;
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using SkiaSharp;
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using System;
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using System.Numerics;
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namespace MystIVAssetExplorer.Skybox;
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partial class SkyboxControl
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{
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private sealed class BoxModelDrawOperation(SkyboxControl owner, ILease<SkyboxModel> boxModelLease) : ICustomDrawOperation
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{
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public Rect Bounds => new(owner.Bounds.Size);
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public void Dispose() => boxModelLease.Dispose();
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public bool Equals(ICustomDrawOperation? other) => other == this;
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public bool HitTest(Point p) => false;
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public void Render(ImmediateDrawingContext context)
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{
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using var lease = context.TryGetFeature<ISkiaSharpApiLeaseFeature>()!.Lease();
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var canvas = lease.SkCanvas;
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canvas.ClipRect(Bounds.ToSKRect());
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canvas.Translate((float)Bounds.Width / 2, (float)Bounds.Height / 2);
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DrawSkybox(canvas, boxModelLease.LeasedInstance, (float)owner.AngleX, (float)owner.AngleY, scale: (float)double.Min(Bounds.Width, Bounds.Height) / 2);
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}
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private void DrawSkybox(SKCanvas canvas, SkyboxModel boxModel, float angleX, float angleY, float scale)
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{
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var cubeVertices = new Vector3[]
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{
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new(-1, 1, 1), // 0: left-top-front
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new( 1, 1, 1), // 1: right-top-front
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new(-1, -1, 1), // 2: left-bottom-front
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new( 1, -1, 1), // 3: right-bottom-front
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new(-1, 1, -1), // 4: left-top-back
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new( 1, 1, -1), // 5: right-top-back
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new(-1, -1, -1), // 6: left-bottom-back
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new( 1, -1, -1), // 7: right-bottom-back
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};
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var rotation =
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Quaternion.CreateFromAxisAngle(Vector3.UnitX, angleY)
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* Quaternion.CreateFromAxisAngle(Vector3.UnitY, angleX);
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var rotatedVertices = new Vector3[cubeVertices.Length];
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for (var i = 0; i < cubeVertices.Length; i++)
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rotatedVertices[i] = Vector3.Transform(cubeVertices[i], rotation);
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var faces = new (SKBitmap? Texture, int[] Vertices)[]
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{
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(boxModel.Front, [0, 1, 2, 3]),
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(boxModel.Back, [5, 4, 7, 6]),
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(boxModel.Left, [4, 0, 6, 2]),
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(boxModel.Right, [1, 5, 3, 7]),
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(boxModel.Top, [4, 5, 0, 1]),
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(boxModel.Bottom, [2, 3, 6, 7]),
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};
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using var paint = new SKPaint
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{
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IsAntialias = false,
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FilterQuality = SKFilterQuality.High,
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};
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foreach (var face in faces)
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{
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if (face.Texture is null) continue;
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var firstPointNotBehindCamera = Array.FindIndex(face.Vertices, i => rotatedVertices[i].Z > 0);
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if (firstPointNotBehindCamera == -1)
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continue;
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var pts = new SKPoint[4];
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for (int i = 0; i < 4; i++)
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{
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var v = rotatedVertices[face.Vertices[i]];
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pts[i] = new SKPoint(v.X / v.Z * scale, v.Y / v.Z * -scale);
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}
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canvas.Save();
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// The point used as the matrix's TransX+Y must have Z > 0.
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if (firstPointNotBehindCamera == 0)
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{
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canvas.SetMatrix(canvas.TotalMatrix.PreConcat(MapUnitSquareToGivenPoints(pts[0], pts[1], pts[2], pts[3])));
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canvas.DrawBitmap(face.Texture, new SKRect(0, 0, 1, 1), paint);
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}
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else if (firstPointNotBehindCamera == 1)
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{
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canvas.SetMatrix(canvas.TotalMatrix.PreConcat(MapNegativeXSquareToGivenPoints(pts[0], pts[1], pts[2], pts[3])));
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canvas.DrawBitmap(face.Texture, new SKRect(-1, 0, 0, 1), paint);
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}
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else if (firstPointNotBehindCamera == 2)
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{
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canvas.SetMatrix(canvas.TotalMatrix.PreConcat(MapNegativeYSquareToGivenPoints(pts[0], pts[1], pts[2], pts[3])));
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canvas.DrawBitmap(face.Texture, new SKRect(0, -1, 1, 0), paint);
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}
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else
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{
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canvas.SetMatrix(canvas.TotalMatrix.PreConcat(MapNegativeXYSquareToGivenPoints(pts[0], pts[1], pts[2], pts[3])));
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canvas.DrawBitmap(face.Texture, new SKRect(-1, -1, 0, 0), paint);
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}
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canvas.Restore();
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}
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}
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private static SKMatrix MapUnitSquareToGivenPoints(SKPoint topLeft, SKPoint topRight, SKPoint bottomLeft, SKPoint bottomRight)
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{
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var rightDiff = bottomRight - topRight;
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var bottomDiff = bottomRight - bottomLeft;
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var determinant = rightDiff.X * bottomDiff.Y - bottomDiff.X * rightDiff.Y;
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var topDiff = topRight - topLeft;
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var leftDiff = bottomLeft - topLeft;
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var persp0 = (topDiff.X * bottomDiff.Y - topDiff.Y * bottomDiff.X) / determinant;
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var persp1 = (rightDiff.X * leftDiff.Y - rightDiff.Y * leftDiff.X) / determinant;
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return new SKMatrix
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{
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ScaleX = persp0 * topRight.X + topDiff.X,
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SkewX = persp1 * bottomLeft.X + leftDiff.X,
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TransX = topLeft.X,
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SkewY = persp0 * topRight.Y + topDiff.Y,
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ScaleY = persp1 * bottomLeft.Y + leftDiff.Y,
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TransY = topLeft.Y,
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Persp0 = persp0,
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Persp1 = persp1,
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Persp2 = 1,
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};
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}
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private static SKMatrix MapNegativeXSquareToGivenPoints(SKPoint topLeft, SKPoint topRight, SKPoint bottomLeft, SKPoint bottomRight)
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{
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var leftDiff = bottomLeft - topLeft;
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var bottomDiff = bottomLeft - bottomRight;
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var determinant = leftDiff.X * bottomDiff.Y - bottomDiff.X * leftDiff.Y;
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var topDiff = topLeft - topRight;
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var rightDiff = bottomRight - topRight;
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var persp0 = (bottomDiff.X * topDiff.Y - bottomDiff.Y * topDiff.X) / determinant;
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var persp1 = (leftDiff.X * rightDiff.Y - leftDiff.Y * rightDiff.X) / determinant;
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return new SKMatrix
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{
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ScaleX = persp0 * topLeft.X - topDiff.X,
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SkewX = persp1 * bottomRight.X + rightDiff.X,
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TransX = topRight.X,
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SkewY = persp0 * topLeft.Y - topDiff.Y,
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ScaleY = persp1 * bottomRight.Y + rightDiff.Y,
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TransY = topRight.Y,
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Persp0 = persp0,
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Persp1 = persp1,
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Persp2 = 1,
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};
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}
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private static SKMatrix MapNegativeYSquareToGivenPoints(SKPoint topLeft, SKPoint topRight, SKPoint bottomLeft, SKPoint bottomRight)
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{
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var rightDiff = topRight - bottomRight;
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var topDiff = topRight - topLeft;
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var determinant = rightDiff.X * topDiff.Y - topDiff.X * rightDiff.Y;
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var bottomDiff = bottomRight - bottomLeft;
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var leftDiff = topLeft - bottomLeft;
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var persp0 = (bottomDiff.X * topDiff.Y - bottomDiff.Y * topDiff.X) / determinant;
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var persp1 = (rightDiff.Y * leftDiff.X - rightDiff.X * leftDiff.Y) / determinant;
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return new SKMatrix
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{
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ScaleX = persp0 * bottomRight.X + bottomDiff.X,
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SkewX = persp1 * topLeft.X - leftDiff.X,
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TransX = bottomLeft.X,
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SkewY = persp0 * bottomRight.Y + bottomDiff.Y,
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ScaleY = persp1 * topLeft.Y - leftDiff.Y,
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TransY = bottomLeft.Y,
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Persp0 = persp0,
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Persp1 = persp1,
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Persp2 = 1,
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};
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}
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private static SKMatrix MapNegativeXYSquareToGivenPoints(SKPoint topLeft, SKPoint topRight, SKPoint bottomLeft, SKPoint bottomRight)
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{
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var leftDiff = topLeft - bottomLeft;
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var topDiff = topLeft - topRight;
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var determinant = leftDiff.X * topDiff.Y - topDiff.X * leftDiff.Y;
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var bottomDiff = bottomLeft - bottomRight;
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var rightDiff = topRight - bottomRight;
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var persp0 = (topDiff.X * bottomDiff.Y - topDiff.Y * bottomDiff.X) / determinant;
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var persp1 = (leftDiff.Y * rightDiff.X - leftDiff.X * rightDiff.Y) / determinant;
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return new SKMatrix
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{
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ScaleX = persp0 * bottomLeft.X - bottomDiff.X,
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SkewX = persp1 * topRight.X - rightDiff.X,
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TransX = bottomRight.X,
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SkewY = persp0 * bottomLeft.Y - bottomDiff.Y,
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ScaleY = persp1 * topRight.Y - rightDiff.Y,
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TransY = bottomRight.Y,
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Persp0 = persp0,
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Persp1 = persp1,
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Persp2 = 1,
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};
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}
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}
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}

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