Start of 3d renderer integration

GlitchyEngine/src/Content/ModelLoader.bf

@@ -37,7 +37,7 @@ namespace GlitchyEngine.Content
 		{
 			EcsEntity entity = world.NewEntity();
 
-#if DEBUG
+//#if DEBUG
 			var nameComponent = world.AssignComponent<DebugNameComponent>(entity);
 
 			if (node.Name != null)
@@ -48,7 +48,7 @@ namespace GlitchyEngine.Content
 			{
 				nameComponent.SetName("Unnamed Node");
 			}
-#endif
+//#endif
 
 			if(parentEntity.HasValue)
 			{

GlitchyEngine/src/Platform/DX11/Renderer/Dx11GraphicsContext.bf

@@ -129,6 +129,14 @@ namespace GlitchyEngine.Renderer
 				SetDepthStencilTarget((renderTarget ?? _swapChain.BackBuffer).DepthStencilTarget);
 			}
 		}
+		
+		public override void UnbindRenderTargets()
+		{
+			for (var rt in ref _renderTargets)
+			{
+				rt = null;
+			}
+		}
 
 		public override void BindRenderTargets()
 		{
@@ -193,7 +201,7 @@ namespace GlitchyEngine.Renderer
 
 			for(let entry in shader.Textures)
 			{
-				_textures[entry.Index] = entry.Texture?.nativeResourceView;
+				_textures[entry.Index] = entry.Texture?._nativeResourceView;
 				_samplers[entry.Index] = entry.Texture?.SamplerState?.nativeSamplerState;
 				
 				if(entry.Index >= _textureCount)

GlitchyEngine/src/Platform/DX11/Renderer/Dx11RendererAPI.bf

@@ -75,6 +75,13 @@ namespace GlitchyEngine.Renderer
 			_context.SetDepthStencilTarget(target);
 		}
 
+		public override void UnbindRenderTargets()
+		{
+			Debug.Profiler.ProfileRendererFunction!();
+
+			_context.UnbindRenderTargets();
+		}
+
 		public override void BindRenderTargets()
 		{
 			Debug.Profiler.ProfileRendererFunction!();

GlitchyEngine/src/Platform/DX11/Renderer/Dx11Shader.bf

@@ -49,6 +49,8 @@ namespace GlitchyEngine.Renderer
 				StringView str = StringView((char8*)errorBlob.GetBufferPointer(), (int)errorBlob.GetBufferSize());
 				Log.EngineLogger.Error($"Failed to compile Shader: Error Code({(int)result}): {result} | Error Message: {str}");
 			}
+			
+			Log.EngineLogger.Assert(shaderBlob != null, "Shader compilation failed.");
 		}
 
 		protected internal void Reflect(ID3DBlob* shaderCode)

GlitchyEngine/src/Renderer/GraphicsContext.bf

@@ -34,6 +34,11 @@ namespace GlitchyEngine.Renderer
 		 * @param setDepthTarget If set to true the depth stencil target of the given renderTarget will be bound (only applies if slot is 0).
 		 */
 		public extern void SetRenderTarget(RenderTarget2D renderTarget, int slot = 0, bool setDepthTarget = true);
+		
+		/**
+		 * Unbinds all rendertargets.
+		 */
+		public extern void UnbindRenderTargets();
 
 		/**
 		 * Binds all.

GlitchyEngine/src/Renderer/RenderCommand.bf

@@ -63,6 +63,11 @@ namespace GlitchyEngine.Renderer
 			_rendererAPI.SetDepthStencilTarget(target);
 		}
 
+		public static void UnbindRenderTargets()
+		{
+			_rendererAPI.UnbindRenderTargets();
+		}
+
 		public static void BindRenderTargets()
 		{
 			_rendererAPI.BindRenderTargets();

GlitchyEngine/src/Renderer/Renderer.bf

@@ -1,5 +1,7 @@
 using GlitchyEngine.Math;
 using GlitchyEngine.World;
+using System.Collections;
+using System;
 
 namespace GlitchyEngine.Renderer
 {
@@ -8,6 +10,8 @@ namespace GlitchyEngine.Renderer
 		struct SceneConstants
 		{
 			public Matrix ViewProjection;
+			public Vector3 CameraPosition;
+			public RenderTarget2D CameraTarget;
 		}
 
 		struct ObjectConstants
@@ -15,6 +19,57 @@ namespace GlitchyEngine.Renderer
 			public Matrix Transform;
 		}
 
+		class GBuffer
+		{
+			private uint32 _width;
+			private uint32 _height;
+			
+			public DepthStencilTarget DepthStencil;
+			public RenderTarget2D Color ~ _?.ReleaseRef();
+			public RenderTarget2D Normal ~ _?.ReleaseRef();
+			public RenderTarget2D Position ~ _?.ReleaseRef();
+
+			public void EnsureSize(uint32 width, uint32 height)
+			{
+				if (width <= _width && height <= _height)
+					return;
+
+				if (_width == 0 || _height == 0)
+				{
+					// Note: Depth-Buffer in Color-Target for convenience
+					RenderTarget2DDescription colorDesc = .(.R8G8B8A8_UNorm, width, height, 1, 1, .D24_UNorm_S8_UInt);
+					Color = new RenderTarget2D(colorDesc);
+
+					RenderTarget2DDescription normalDesc = .(.R32G32B32A32_Float, width, height);
+					Normal = new RenderTarget2D(normalDesc);
+
+					RenderTarget2DDescription positionDesc = .(.R32G32B32A32_Float, width, height);
+					Position = new RenderTarget2D(positionDesc);
+				}
+
+				_width = width;
+				_height = height;
+
+				Color.Resize(_width, _height);
+				Normal.Resize(_width, _height);
+				Position.Resize(_width, _height);
+
+				DepthStencil = Color.DepthStencilTarget;
+			}
+
+			public void Bind()
+			{
+				RenderCommand.SetDepthStencilTarget(DepthStencil);
+
+				RenderCommand.UnbindRenderTargets();
+				RenderCommand.SetRenderTarget(Color, 0);
+				RenderCommand.SetRenderTarget(Normal, 1);
+				RenderCommand.SetRenderTarget(Position, 2);
+
+				RenderCommand.BindRenderTargets();
+			}
+		}
+
 		static internal GraphicsContext _context ~ _?.ReleaseRef();
 
 		//static Buffer<SceneConstants> _sceneConstants ~ _?.ReleaseRef();
@@ -27,6 +82,9 @@ namespace GlitchyEngine.Renderer
 		static VertexBuffer LineVertices ~ _?.ReleaseRef();
 		static GeometryBinding LineGeometry ~ _?.ReleaseRef();
 
+		static GBuffer _gBuffer ~ delete _;
+		static Effect TestFullscreenEffect ~ _?.ReleaseRef();
+
 		public static void Init(GraphicsContext context, EffectLibrary effectLibrary)
 		{
 			Debug.Profiler.ProfileFunction!();
@@ -44,6 +102,9 @@ namespace GlitchyEngine.Renderer
 			Renderer2D.Init();
 
 			InitLineRenderer(effectLibrary);
+			InitDeferredRenderer(effectLibrary);
+
+			_gBuffer = new GBuffer();
 		}
 
 		public static void Deinit()
@@ -78,6 +139,50 @@ namespace GlitchyEngine.Renderer
 			VertexLayout layout = new VertexLayout(vertexElements, true, LineEffect.VertexShader);
 			LineGeometry.SetVertexLayout(layout..ReleaseRefNoDelete());
 		}
+		
+		private static GeometryBinding s_quadGeometry ~ _?.ReleaseRef();
+
+		static void InitDeferredRenderer(EffectLibrary effectLibrary)
+		{
+			TestFullscreenEffect = effectLibrary.Load("content\\Shaders\\simpleLight.hlsl");
+
+			s_quadGeometry = new GeometryBinding();
+			s_quadGeometry.SetPrimitiveTopology(.TriangleList);
+
+			using(var quadVertices = new VertexBuffer(typeof(Vector4), 4, .Immutable))
+			{
+				Vector4[4] vertices = .(
+					.(-0.5f,-0.5f, 0, 1),
+					.(-0.5f, 0.5f, 0, 0),
+					.( 0.5f, 0.5f, 1, 0),
+					.( 0.5f,-0.5f, 1, 1)
+					);
+
+				quadVertices.SetData(vertices);
+				s_quadGeometry.SetVertexBufferSlot(quadVertices, 0);
+			}
+
+			using(var quadIndices = new IndexBuffer(6, .Immutable))
+			{
+				uint16[6] indices = .(
+						0, 1, 2,
+						2, 3, 0
+					);
+
+				quadIndices.SetData(indices);
+				s_quadGeometry.SetIndexBuffer(quadIndices);
+			}
+
+			VertexElement[] vertexElements = new .(
+				VertexElement(.R32G32_Float, "POSITION", false, 0, 0, 0, .PerVertexData, 0),
+				VertexElement(.R32G32_Float, "TEXCOORD", false, 0, 0, (.)-1, .PerVertexData, 0)
+			);
+
+			using (var quadBatchLayout = new VertexLayout(vertexElements, true, TestFullscreenEffect.VertexShader))
+			{
+				s_quadGeometry.SetVertexLayout(quadBatchLayout);
+			}
+		}
 
 		// TODO
 		/*public static void BeginScene(EcsWorld world, EcsEntity cameraEntity)
@@ -103,9 +208,98 @@ namespace GlitchyEngine.Renderer
 			//_sceneConstants.Update();
 		}
 
+		public static void BeginScene(Camera camera, Matrix transform, RenderTarget2D renderTarget)
+		{
+			Debug.Profiler.ProfileRendererFunction!();
+			
+			Matrix viewProjection = camera.Projection * Matrix.Invert(transform);
+			_sceneConstants.ViewProjection = viewProjection;
+			_sceneConstants.CameraPosition = transform.Translation;
+			_sceneConstants.CameraTarget = renderTarget;
+		}
+
+		public static int SortMeshes(SubmittedMesh left, SubmittedMesh right)
+		{
+			// TODO: Once Material "inheritance" is ready we could perhaps check how similar materials are (e.g. shared textures/variables/etc...)
+			// Similar thing could be done for Meshes. Both would probably require a different way to sort howerver?...
+
+			int cmp = (int)Internal.UnsafeCastToPtr(left.Material) <=> (int)Internal.UnsafeCastToPtr(right.Material);
+
+			// Material equal: Sort by Mesh
+			if (cmp == 0)
+			{
+				cmp = (int)Internal.UnsafeCastToPtr(left.Mesh) <=> (int)Internal.UnsafeCastToPtr(right.Mesh);
+
+				// Material and Mesh equal: sort by distance
+				if (cmp == 0)
+				{
+					float distLeftSq = Vector3.DistanceSquared(_sceneConstants.CameraPosition, left.Transform.Translation);
+					float distRightSq = Vector3.DistanceSquared(_sceneConstants.CameraPosition, right.Transform.Translation);
+
+					// Whether or not the values are squared doesn't affect the order (because square(-root) is a monotonic function)
+					cmp = distLeftSq <=> distRightSq;
+				}
+			}
+
+			return 0;
+		}
+
 		public static void EndScene()
 		{
 			Debug.Profiler.ProfileRendererFunction!();
+
+			_queue.Sort(scope => SortMeshes);
+
+			// Deferred renderer:
+
+			// TODO: foreach light: draw shadow map
+			
+			// foreach camera:
+			// {
+			_gBuffer.EnsureSize(_sceneConstants.CameraTarget.Width, _sceneConstants.CameraTarget.Height);
+			_gBuffer.Bind();
+			RenderCommand.Clear(_gBuffer.Color, .Color | .Depth, .Blue, 1, 0);
+			RenderCommand.Clear(_gBuffer.Normal, Color.Beige);
+			RenderCommand.Clear(_gBuffer.Position, Color.Black);
+			
+			/*RenderCommand.UnbindRenderTargets();
+			RenderCommand.SetRenderTarget(_sceneConstants.CameraTarget, 0, true);
+			RenderCommand.BindRenderTargets();*/
+
+			// TODO: Draw into GBuffer
+			for (SubmittedMesh entry in _queue)
+			{
+				entry.Material.SetVariable("ViewProjection", _sceneConstants.ViewProjection);
+				entry.Material.SetVariable("Transform", entry.Transform);
+	
+				entry.Material.Bind(_context);
+	
+				entry.Mesh.Bind();
+				RenderCommand.DrawIndexed(entry.Mesh);
+			}
+			
+			RenderCommand.UnbindRenderTargets();
+			RenderCommand.SetRenderTarget(_sceneConstants.CameraTarget, 0, true);
+			RenderCommand.BindRenderTargets();
+
+			_gBuffer.Color.SamplerState = SamplerStateManager.PointClamp;
+
+			TestFullscreenEffect.SetTexture("Colors", _gBuffer.Color);
+			TestFullscreenEffect.SetTexture("Normals", _gBuffer.Normal);
+			//TestFullscreenEffect.SetTexture("Positions", _gBuffer.Position);
+
+			//TestFullscreenEffect.SetVariable("LightDir");
+
+			TestFullscreenEffect.Bind(_context);
+
+			s_quadGeometry.Bind();
+			RenderCommand.DrawIndexed(s_quadGeometry);
+
+			// TODO: Draw lights to camera target
+			// }
+
+			// Queue entries increase the reference counter of the mesh/material thus we have to dispose of them.
+			ClearAndDisposeItems!(_queue);
 		}
 
 		public static void Submit(GeometryBinding geometry, Effect effect, Matrix transform = .Identity)
@@ -130,17 +324,33 @@ namespace GlitchyEngine.Renderer
 			RenderCommand.DrawIndexed(geometry);
 		}
 
+		struct SubmittedMesh : IDisposable
+		{
+			public GeometryBinding Mesh;
+			public Material Material;
+			public Matrix Transform;
+
+			public this(GeometryBinding mesh, Material material, Matrix transform)
+			{
+				Mesh = mesh..AddRef();
+				Material = material..AddRef();
+				Transform = transform;
+			}
+
+			public void Dispose()
+			{
+				Mesh.ReleaseRef();
+				Material.ReleaseRef();
+			}
+		}
+
+		private static List<SubmittedMesh> _queue = new .(10000) ~ DeleteContainerAndDisposeItems!(_);
+
 		public static void Submit(GeometryBinding geometry, Material material, Matrix transform = .Identity)
 		{
 			Debug.Profiler.ProfileRendererFunction!();
 
-			material.SetVariable("ViewProjection", _sceneConstants.ViewProjection);
-			material.SetVariable("Transform", transform);
-
-			material.Bind(_context);
-
-			geometry.Bind();
-			RenderCommand.DrawIndexed(geometry);
+			_queue.Add(SubmittedMesh(geometry, material, transform));
 		}
 
 		/** @brief Draws a line.

GlitchyEngine/src/Renderer/RendererAPI.bf

@@ -38,6 +38,8 @@ namespace GlitchyEngine.Renderer
 
 		public extern void SetDepthStencilTarget(DepthStencilTarget target);
 
+		public extern void UnbindRenderTargets();
+
 		public extern void BindRenderTargets();
 
 		public extern void SetRasterizerState(RasterizerState rasterizerState);

GlitchyEngine/src/World/Components.bf

@@ -249,16 +249,31 @@ namespace GlitchyEngine.World
 		}
 	}
 
-	struct CameraComponent
+	struct CameraComponent : IDisposableComponent
 	{
 		public SceneCamera Camera;
 		public bool Primary = true;  // Todo: probably move into scene
 		public bool FixedAspectRatio = false;
+		private RenderTarget2D _renderTarget = null;
+
+		public RenderTarget2D RenderTarget
+		{
+			get => _renderTarget;
+			set mut
+			{
+				SetReference!(_renderTarget, value);
+			}
+		}
 
 		public this()
 		{
 			Camera = .();
-		}	
+		}
+
+		public void Dispose()
+		{
+			_renderTarget?.ReleaseRef();
+		}
 	}
 
 	struct NativeScriptComponent : IDisposableComponent

GlitchyEngine/src/World/Scene.bf

@@ -52,6 +52,7 @@ namespace GlitchyEngine.World
 
 			Camera* primaryCamera = null;
 			Matrix primaryCameraTransform = default;
+			RenderTarget2D renderTarget = null;
 
 			for (var (entity, transform, camera) in _ecsWorld.Enumerate<TransformComponent, CameraComponent>())
 			{
@@ -59,12 +60,23 @@ namespace GlitchyEngine.World
 				{
 					primaryCamera = &camera.Camera;
 					primaryCameraTransform = transform.WorldTransform;
+					renderTarget = camera.RenderTarget..AddRef();
 				}
 			}
 			
-			// Sprite renderer
 			if (primaryCamera != null)
-			{ 
+			{
+				// 3D render
+				Renderer.BeginScene(*primaryCamera, primaryCameraTransform, renderTarget);
+
+				for (var (entity, transform, mesh, meshRenderer) in _ecsWorld.Enumerate<TransformComponent, MeshComponent, MeshRendererComponent>())
+				{
+					Renderer.Submit(mesh.Mesh, meshRenderer.Material, transform.WorldTransform);
+				}
+
+				Renderer.EndScene();
+
+				// Sprite renderer
 				Renderer2D.BeginScene(*primaryCamera, primaryCameraTransform);
 	
 				for (var (entity, transform, sprite) in _ecsWorld.Enumerate<TransformComponent, SpriterRendererComponent>())
@@ -73,6 +85,8 @@ namespace GlitchyEngine.World
 				}
 	
 				Renderer2D.EndScene();
+
+				renderTarget?.ReleaseRef();
 			}
 		}