deferred skybox

Effects/HLSL/SkyboxEffect.fx

@@ -0,0 +1,45 @@
+#include "Macros.fxh"
+
+DECLARE_CUBEMAP(skybox, 0);
+
+BEGIN_CONSTANTS
+
+    float4x4 ViewProjection _vs(c0)    _cb(c0);
+
+END_CONSTANTS
+
+struct VertexShaderInput
+{
+    float3 Position : POSITION;
+};
+
+struct VertexShaderOutput
+{
+    float4 Position : SV_POSITION;
+    float3 TexCoord : TEXCOORD;
+};
+
+VertexShaderOutput main_vs(VertexShaderInput input)
+{
+    VertexShaderOutput output;
+
+    output.Position = mul(float4(input.Position, 1.0), ViewProjection);
+    output.Position = output.Position.xyww;
+    output.TexCoord = input.Position;
+
+    return output;
+}
+
+float4 main_ps(VertexShaderOutput input) : SV_TARGET0
+{
+    return SAMPLE_CUBEMAP(skybox, input.TexCoord);
+}
+
+Technique Skybox
+{
+    Pass
+    {
+        VertexShader = compile vs_3_0 main_vs();
+        PixelShader  = compile ps_3_0 main_ps();
+    }
+}

Effects/SkyboxEffect.cs

@@ -0,0 +1,77 @@
+using Microsoft.Xna.Framework;
+using Microsoft.Xna.Framework.Graphics;
+
+namespace Kav
+{
+    public class SkyboxEffect : Effect
+    {
+        EffectParameter viewProjectionParam;
+        EffectParameter skyboxParam;
+
+        Matrix view;
+        Matrix projection;
+        TextureCube skybox;
+
+        EffectDirtyFlags dirtyFlags = EffectDirtyFlags.All;
+
+        public Matrix View
+        {
+            get { return view; }
+            set 
+            {
+                view = value;
+                dirtyFlags |= EffectDirtyFlags.WorldViewProj;
+            }
+        }
+
+        public Matrix Projection
+        {
+            get { return projection; }
+            set
+            {
+                projection = value;
+                dirtyFlags |= EffectDirtyFlags.WorldViewProj;
+            }
+        }
+
+        public TextureCube Skybox
+        {
+            get { return skybox; }
+            set
+            {
+                skybox = value;
+                dirtyFlags |= EffectDirtyFlags.World; // hack flag but whatever
+            }
+        }
+
+        public SkyboxEffect(GraphicsDevice graphicsDevice) : base(graphicsDevice, Resources.SkyboxEffect)
+        {
+            CacheEffectParameters();
+        }
+
+        protected override void OnApply()
+        {
+            if ((dirtyFlags & EffectDirtyFlags.WorldViewProj) != 0)
+            {
+                Matrix.Multiply(ref view, ref projection, out Matrix viewProjection);
+
+                viewProjectionParam.SetValue(viewProjection);
+
+                dirtyFlags &= ~EffectDirtyFlags.WorldViewProj;
+            }
+
+            if ((dirtyFlags & EffectDirtyFlags.World) != 0)
+            {
+                skyboxParam.SetValue(skybox);
+
+                dirtyFlags &= ~EffectDirtyFlags.World;
+            }
+        }
+
+        private void CacheEffectParameters()
+        {
+            viewProjectionParam = Parameters["ViewProjection"];
+            skyboxParam = Parameters["skybox"];
+        }
+    }
+}

Kav.Core.csproj

@@ -42,6 +42,12 @@
     <EmbeddedResource Include="Effects\FXB\SimpleDepthEffect.fxb">
       <LogicalName>Kav.Resources.SimpleDepthEffect.fxb</LogicalName>
 		</EmbeddedResource>
+    <EmbeddedResource Include="Effects\FXB\SkyboxEffect.fxb">
+      <LogicalName>Kav.Resources.SkyboxEffect.fxb</LogicalName>
+		</EmbeddedResource>
+    <EmbeddedResource Include="Models\UnitCube.glb">
+      <LogicalName>Kav.Resources.UnitCube.glb</LogicalName>
+		</EmbeddedResource>
   </ItemGroup>
 
 </Project>

Kav.Framework.csproj

@@ -42,6 +42,12 @@
     <EmbeddedResource Include="Effects\FXB\SimpleDepthEffect.fxb">
       <LogicalName>Kav.Resources.SimpleDepthEffect.fxb</LogicalName>
 		</EmbeddedResource>
+    <EmbeddedResource Include="Effects\FXB\SkyboxEffect.fxb">
+      <LogicalName>Kav.Resources.SkyboxEffect.fxb</LogicalName>
+		</EmbeddedResource>
+    <EmbeddedResource Include="Models\UnitCube.glb">
+      <LogicalName>Kav.Resources.UnitCube.glb</LogicalName>
+		</EmbeddedResource>
   </ItemGroup>
 
 </Project>

Renderer.cs

@@ -1,4 +1,5 @@
 using System.Collections.Generic;
+using System.IO;
 using Microsoft.Xna.Framework;
 using Microsoft.Xna.Framework.Graphics;
 
@@ -29,6 +30,7 @@ namespace Kav
         private Deferred_ToonEffect Deferred_ToonEffect { get; }
         private SimpleDepthEffect SimpleDepthEffect { get; }
         private Effect ToneMapEffect { get; }
+        private SkyboxEffect SkyboxEffect { get; }
 
         private RenderTarget2D gPosition { get; }
         private RenderTarget2D gNormal { get; }
@@ -37,6 +39,8 @@ namespace Kav
 
         private RenderTargetBinding[] GBuffer { get; }
 
+        private Kav.Model UnitCube { get; }
+
         private SpriteBatch SpriteBatch { get; }
 
         public Renderer(
@@ -73,7 +77,7 @@ namespace Kav
                 renderDimensionsY,
                 false,
                 SurfaceFormat.Color,
-                DepthFormat.None,
+                DepthFormat.Depth24,
                 0,
                 RenderTargetUsage.PreserveContents
             );
@@ -142,6 +146,7 @@ namespace Kav
             DeferredDirectionalLightEffect.ShadowMapSize = ShadowMapSize;
             ToneMapEffect = new Effect(graphicsDevice, Resources.ToneMapEffect);
             Deferred_ToonEffect = new Deferred_ToonEffect(GraphicsDevice);
+            SkyboxEffect = new SkyboxEffect(GraphicsDevice);
 
             FullscreenTriangle = new VertexBuffer(GraphicsDevice, typeof(VertexPositionTexture), 3, BufferUsage.WriteOnly);
             FullscreenTriangle.SetData(new VertexPositionTexture[3] {
@@ -150,6 +155,11 @@ namespace Kav
                 new VertexPositionTexture(new Vector3(3, 1, 0), new Vector2(2, 0))
             });
 
+            UnitCube = Kav.ModelLoader.Load(
+                GraphicsDevice,
+                Smuggler.Importer.ImportGLB(GraphicsDevice, new MemoryStream(Resources.UnitCubeModel))
+            );
+
             SpriteBatch = new SpriteBatch(graphicsDevice);
         }
 
@@ -187,23 +197,95 @@ namespace Kav
             PerspectiveCamera camera,
             IEnumerable<(Model, Matrix)> modelTransforms,
             AmbientLight ambientLight,
-            DirectionalLight directionalLight
+            DirectionalLight directionalLight,
+            TextureCube skybox
         ) {            
             GBufferRender(camera, modelTransforms);
 
             GraphicsDevice.SetRenderTarget(ColorRenderTarget);
-            GraphicsDevice.Clear(Color.Black);
+            GraphicsDevice.Clear(ClearOptions.Target | ClearOptions.DepthBuffer, Color.Black, 1f, 0);
+            GraphicsDevice.DepthStencilState = DepthStencilState.Default;
+
+            DepthRender(camera, modelTransforms);
+            GraphicsDevice.DepthStencilState = DepthStencilState.DepthRead;
 
             AmbientLightRender(ambientLight);
             DirectionalLightToonRender(camera, modelTransforms, directionalLight);
+            SkyboxRender(camera, skybox);
 
             GraphicsDevice.SetRenderTarget(null);
-            GraphicsDevice.Clear(Color.Black);
             SpriteBatch.Begin(SpriteSortMode.Deferred, BlendState.Opaque, null, null, null, null);
             SpriteBatch.Draw(ColorRenderTarget, Vector2.Zero, Color.White);
             SpriteBatch.End();
         }
 
+        private void DepthRender(
+            PerspectiveCamera camera,
+            IEnumerable<(Model, Matrix)> modelTransforms
+        ) {
+            foreach (var (model, transform) in modelTransforms)
+            {
+                foreach (var modelMesh in model.Meshes)
+                {
+                    foreach (var meshPart in modelMesh.MeshParts)
+                    {
+                        SimpleDepthEffect.Model = transform;
+                        SimpleDepthEffect.View = camera.View;
+                        SimpleDepthEffect.Projection = camera.Projection;
+
+                        GraphicsDevice.SetVertexBuffer(meshPart.VertexBuffer);
+                        GraphicsDevice.Indices = meshPart.IndexBuffer;
+
+                        foreach (var pass in SimpleDepthEffect.CurrentTechnique.Passes)
+                        {
+                            pass.Apply();
+
+                            GraphicsDevice.DrawIndexedPrimitives(
+                                PrimitiveType.TriangleList,
+                                0,
+                                0,
+                                meshPart.VertexBuffer.VertexCount,
+                                0,
+                                meshPart.Triangles.Length
+                            );
+                        }
+                    }
+                }
+            }
+        }
+
+        private void SkyboxRender(
+            PerspectiveCamera camera,
+            TextureCube skybox
+        ) {
+            GraphicsDevice.RasterizerState.CullMode = CullMode.CullClockwiseFace;
+            SkyboxEffect.Skybox = skybox;
+
+            var view = camera.View;
+            view.Translation = Vector3.Zero;
+            SkyboxEffect.View = view;
+
+            SkyboxEffect.Projection = camera.Projection;
+
+            GraphicsDevice.SetVertexBuffer(UnitCube.Meshes[0].MeshParts[0].VertexBuffer);
+            GraphicsDevice.Indices = UnitCube.Meshes[0].MeshParts[0].IndexBuffer;
+
+            foreach (var pass in SkyboxEffect.CurrentTechnique.Passes)
+            {
+                pass.Apply();
+
+                GraphicsDevice.DrawIndexedPrimitives(
+                    PrimitiveType.TriangleList,
+                    0,
+                    0,
+                    UnitCube.Meshes[0].MeshParts[0].VertexBuffer.VertexCount,
+                    0,
+                    UnitCube.Meshes[0].MeshParts[0].Triangles.Length
+                );
+            }
+            GraphicsDevice.RasterizerState.CullMode = CullMode.CullCounterClockwiseFace;
+        }
+
         private void GBufferRender(
             PerspectiveCamera camera,
             IEnumerable<(Model, Matrix)> modelTransforms
@@ -255,8 +337,7 @@ namespace Kav
         private void AmbientLightRender(AmbientLight ambientLight)
         {
             GraphicsDevice.SetRenderTarget(ColorRenderTarget);
-            GraphicsDevice.BlendState = BlendState.Additive;
+            GraphicsDevice.BlendState = BlendState.Opaque;
-            GraphicsDevice.DepthStencilState = DepthStencilState.None;
 
             DeferredAmbientLightEffect.GPosition = gPosition;
             DeferredAmbientLightEffect.GAlbedo = gAlbedo;
@@ -341,6 +422,7 @@ namespace Kav
             RenderShadows(camera, modelTransforms, directionalLight, Deferred_ToonEffect);
 
             GraphicsDevice.SetRenderTarget(ColorRenderTarget);
+            GraphicsDevice.DepthStencilState = DepthStencilState.DepthRead;
             GraphicsDevice.BlendState = BlendState.Additive;
 
             Deferred_ToonEffect.GPosition = gPosition;

Resources.cs

@@ -10,7 +10,7 @@ namespace Kav
             {
                 if (ambientLightEffect == null)
                 {
-                    ambientLightEffect = GetResource("DeferredPBR_AmbientLightEffect");
+                    ambientLightEffect = GetResource("DeferredPBR_AmbientLightEffect.fxb");
                 }
                 return ambientLightEffect;
             }
@@ -21,7 +21,7 @@ namespace Kav
             {
                 if (pointLightEffect == null)
                 {
-                    pointLightEffect = GetResource("DeferredPBR_PointLightEffect");
+                    pointLightEffect = GetResource("DeferredPBR_PointLightEffect.fxb");
                 }
                 return pointLightEffect;
             }
@@ -33,7 +33,7 @@ namespace Kav
             {
                 if (directionalLightEffect == null)
                 {
-                    directionalLightEffect = GetResource("DeferredPBR_DirectionalLightEffect");
+                    directionalLightEffect = GetResource("DeferredPBR_DirectionalLightEffect.fxb");
                 }
                 return directionalLightEffect;
             }
@@ -45,7 +45,7 @@ namespace Kav
             {
                 if (gBufferEffect == null)
                 {
-                    gBufferEffect = GetResource("DeferredPBR_GBufferEffect");
+                    gBufferEffect = GetResource("DeferredPBR_GBufferEffect.fxb");
                 }
                 return gBufferEffect;
             }
@@ -57,7 +57,7 @@ namespace Kav
             {
                 if (toneMapEffect == null)
                 {
-                    toneMapEffect = GetResource("ToneMapEffect");
+                    toneMapEffect = GetResource("ToneMapEffect.fxb");
                 }
                 return toneMapEffect;
             }
@@ -69,7 +69,7 @@ namespace Kav
             {
                 if (deferredToonEffect == null)
                 {
-                    deferredToonEffect = GetResource("Deferred_ToonEffect");
+                    deferredToonEffect = GetResource("Deferred_ToonEffect.fxb");
                 }
                 return deferredToonEffect;
             }
@@ -81,7 +81,7 @@ namespace Kav
             {
                 if (deferredPBREffect == null)
                 {
-                    deferredPBREffect = GetResource("DeferredPBREffect");
+                    deferredPBREffect = GetResource("DeferredPBREffect.fxb");
                 }
                 return deferredPBREffect;
             }
@@ -93,7 +93,7 @@ namespace Kav
             {
                 if (pbrEffect == null)
                 {
-                    pbrEffect = GetResource("PBREffect");
+                    pbrEffect = GetResource("PBREffect.fxb");
                 }
                 return pbrEffect;
             }
@@ -105,12 +105,36 @@ namespace Kav
             {
                 if (simpleDepthEffect == null)
                 {
-                    simpleDepthEffect = GetResource("SimpleDepthEffect");
+                    simpleDepthEffect = GetResource("SimpleDepthEffect.fxb");
                 }
                 return simpleDepthEffect;
             }
         }
 
+        public static byte[] SkyboxEffect
+        {
+            get
+            {
+                if (skyboxEffect == null)
+                {
+                    skyboxEffect = GetResource("SkyboxEffect.fxb");
+                }
+                return skyboxEffect;
+            }
+        }
+
+        public static byte[] UnitCubeModel
+        {
+            get
+            {
+                if (unitCubeModel == null)
+                {
+                    unitCubeModel = GetResource("UnitCube.glb");
+                }
+                return unitCubeModel;
+            }
+        }
+
         private static byte[] ambientLightEffect;
         private static byte[] pointLightEffect;
         private static byte[] directionalLightEffect;
@@ -120,11 +144,14 @@ namespace Kav
         private static byte[] deferredPBREffect;
         private static byte[] pbrEffect;
         private static byte[] simpleDepthEffect;
+        private static byte[] skyboxEffect;
+
+        private static byte[] unitCubeModel;
 
         private static byte[] GetResource(string name)
         {
             Stream stream = typeof(Resources).Assembly.GetManifestResourceStream(
-                "Kav.Resources." + name + ".fxb"
+                "Kav.Resources." + name
             );
             using (MemoryStream ms = new MemoryStream())
             {