Assets: Working on GLTF2 loading.

Author: amerkoleci

assets/Shaders/IBL.slang

@@ -49,9 +49,9 @@ Texture2D<float4> inputTexture : register(t0);
 RWTexture2DArray<float4> outputTexture : register(u0);
 // SamplerState defaultSampler : register(s0);
 
+// Utility kernel for converting from an equirectangular environment map (LDR or HDR) to a cube map
 [shader("compute")]
 [numthreads(32, 32, 1)]
-// Utility kernel for converting from an equirectangular environment map (LDR or HDR) to a cube map
 void CubeFromEquirectangular(uint3 ThreadID: SV_DispatchThreadID)
 {
     const SamplerState equirectSampler = SamplerLinearClamp;

src/Alimer/Engine/Components/MeshComponent.cs

@@ -5,7 +5,11 @@
 
 namespace Alimer.Engine;
 
-public sealed partial class MeshComponent : RenderableComponent
+/// <summary>
+/// A component that contains a mesh and materials for the visual appearance of an entity.
+/// </summary>
+[DefaultEntitySystem(typeof(RenderSystem))]
+public sealed partial class MeshComponent : Component
 {
     /// Local-space bounding box.
     private BoundingBox _localBoundingBox;

src/Alimer/Engine/Components/RenderableComponent.cs

@@ -8,7 +8,9 @@
 
 namespace Alimer.Rendering;
 
-public sealed unsafe partial class RenderSystem : EntitySystem<MeshComponent>
+// TODO: Add support for RenderableComponent (ParticleSystem or other?)
+
+public sealed partial class RenderSystem : EntitySystem<MeshComponent>
 {
     // ShaderTypes.h
     public const int FrameBindGroupSpace = 3;

src/Alimer/Rendering/RenderSystem.cs

@@ -48,16 +48,6 @@ public static ref readonly TTo AsReadonly<TFrom, TTo>(in TFrom source)
     public static Span<T> AsSpan<T>(this ReadOnlySpan<T> span)
         => MemoryMarshal.CreateSpan(ref Unsafe.AsRef(in MemoryMarshal.GetReference(span)), span.Length);
 
-    /// <inheritdoc cref="MemoryMarshal.Cast{TFrom, TTo}(Span{TFrom})" />
-    public static Span<TTo> Cast<TFrom, TTo>(this Span<TFrom> span)
-        where TFrom : struct
-        where TTo : struct => MemoryMarshal.Cast<TFrom, TTo>(span);
-
-    /// <inheritdoc cref="MemoryMarshal.Cast{TFrom, TTo}(ReadOnlySpan{TFrom})" />
-    public static ReadOnlySpan<TTo> Cast<TFrom, TTo>(this ReadOnlySpan<TFrom> span)
-        where TFrom : struct
-        where TTo : struct => MemoryMarshal.Cast<TFrom, TTo>(span);
-
     /// <inheritdoc cref="MemoryMarshal.CreateSpan{T}(ref T, int)" />
     public static Span<T> CreateSpan<T>(scoped ref T reference, int length) => MemoryMarshal.CreateSpan(ref reference, length);
 

src/Alimer/Utilities/UnsafeUtilities.cs

@@ -78,11 +78,7 @@ public async Task<bool> Run(string inputDirectory, string outputDirectory, TextW
             metadata.FileRelativePath = Path.GetRelativePath(inputDirectory, metadata.FileFullPath);
 
             //string json = metadata.ToJson();
-            Asset? asset = await Import(metadata);
-
-            if (asset is null)
-                throw new NullReferenceException("Asset is null");
-
+            Asset? asset = await Import(metadata) ?? throw new NullReferenceException("Asset is null");
             if (_writers.TryGetValue(asset.GetType(), out IAssetTypeWriter? assetWriter))
             {
                 string outputFileName = Path.ChangeExtension(Path.GetFileNameWithoutExtension(assetFileName), assetWriter.FileExtension);