BTSDS: Outline postprocess approach

Assets/RUPRenderer_Outline.asset

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Assets/Resources/Games/builtToScaleDS.prefab

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Assets/Resources/Sprites/Games/BuiltToScaleDS/Materials/Object.mat

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   m_CorrespondingSourceObject: {fileID: 0}
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+  m_Name: Object
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+  m_Shader: {fileID: 4800000, guid: 8d2bb70cbf9db8d4da26e15b26e74248, type: 3}
   m_ShaderKeywords: 
   m_LightmapFlags: 4
   m_EnableInstancingVariants: 0
   m_DoubleSidedGI: 0
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+  m_CustomRenderQueue: 2000
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+  stringTagMap:
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   disabledShaderPasses: []
   m_SavedProperties:
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@@ -98,6 +99,7 @@ Material:
     - _EnvironmentReflections: 1
     - _GlossMapScale: 0
     - _Glossiness: 0
+    - _GlossinessSource: 0
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     - _IndirectLightMultiplier: 1
     - _IsFace: 0
@@ -116,8 +118,11 @@ Material:
     - _ReceiveShadowMappingPosOffset: 0
     - _ReceiveShadows: 1
     - _SampleGI: 0
+    - _Shininess: 0
     - _Smoothness: 0.5
+    - _SmoothnessSource: 0
     - _SmoothnessTextureChannel: 0
+    - _SpecSource: 0
     - _SpecularHighlights: 1
     - _SrcBlend: 1
     - _Surface: 0

Assets/Shaders/Outline.meta

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Assets/Shaders/Outline/DepthNormalsFeature.cs

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+using UnityEngine;
+using UnityEngine.Rendering;
+using UnityEngine.Rendering.Universal;
+
+public class DepthNormalsFeature : ScriptableRendererFeature
+{
+    class DepthNormalsPass : ScriptableRenderPass
+    {
+        int kDepthBufferBits = 32;
+        private RenderTargetHandle depthAttachmentHandle { get; set; }
+        internal RenderTextureDescriptor descriptor { get; private set; }
+
+        private Material depthNormalsMaterial = null;
+        private FilteringSettings m_FilteringSettings;
+        string m_ProfilerTag = "DepthNormals Prepass";
+        ShaderTagId m_ShaderTagId = new ShaderTagId("DepthOnly");
+
+        public DepthNormalsPass(RenderQueueRange renderQueueRange, LayerMask layerMask, Material material)
+        {
+            m_FilteringSettings = new FilteringSettings(renderQueueRange, layerMask);
+            depthNormalsMaterial = material;
+        }
+
+        public void Setup(RenderTextureDescriptor baseDescriptor, RenderTargetHandle depthAttachmentHandle)
+        {
+            this.depthAttachmentHandle = depthAttachmentHandle;
+            baseDescriptor.colorFormat = RenderTextureFormat.ARGB32;
+            baseDescriptor.depthBufferBits = kDepthBufferBits;
+            descriptor = baseDescriptor;
+        }
+
+        // This method is called before executing the render pass.
+        // It can be used to configure render targets and their clear state. Also to create temporary render target textures.
+        // When empty this render pass will render to the active camera render target.
+        // You should never call CommandBuffer.SetRenderTarget. Instead call <c>ConfigureTarget</c> and <c>ConfigureClear</c>.
+        // The render pipeline will ensure target setup and clearing happens in an performance manner.
+        public override void Configure(CommandBuffer cmd, RenderTextureDescriptor cameraTextureDescriptor)
+        {
+            cmd.GetTemporaryRT(depthAttachmentHandle.id, descriptor, FilterMode.Point);
+            ConfigureTarget(depthAttachmentHandle.Identifier());
+            ConfigureClear(ClearFlag.All, Color.black);
+        }
+
+        // Here you can implement the rendering logic.
+        // Use <c>ScriptableRenderContext</c> to issue drawing commands or execute command buffers
+        // https://docs.unity3d.com/ScriptReference/Rendering.ScriptableRenderContext.html
+        // You don't have to call ScriptableRenderContext.submit, the render pipeline will call it at specific points in the pipeline.
+        public override void Execute(ScriptableRenderContext context, ref RenderingData renderingData)
+        {
+            CommandBuffer cmd = CommandBufferPool.Get(m_ProfilerTag);
+
+            using (new ProfilingSample(cmd, m_ProfilerTag))
+            {
+                context.ExecuteCommandBuffer(cmd);
+                cmd.Clear();
+
+                var sortFlags = renderingData.cameraData.defaultOpaqueSortFlags;
+                var drawSettings = CreateDrawingSettings(m_ShaderTagId, ref renderingData, sortFlags);
+                drawSettings.perObjectData = PerObjectData.None;
+
+
+                ref CameraData cameraData = ref renderingData.cameraData;
+                Camera camera = cameraData.camera;
+                if (cameraData.isStereoEnabled)
+                    context.StartMultiEye(camera);
+
+
+                drawSettings.overrideMaterial = depthNormalsMaterial;
+
+
+                context.DrawRenderers(renderingData.cullResults, ref drawSettings,
+                    ref m_FilteringSettings);
+
+                cmd.SetGlobalTexture("_CameraDepthNormalsTexture", depthAttachmentHandle.id);
+            }
+
+            context.ExecuteCommandBuffer(cmd);
+            CommandBufferPool.Release(cmd);
+        }
+
+        /// Cleanup any allocated resources that were created during the execution of this render pass.
+        public override void FrameCleanup(CommandBuffer cmd)
+        {
+            if (depthAttachmentHandle != RenderTargetHandle.CameraTarget)
+            {
+                cmd.ReleaseTemporaryRT(depthAttachmentHandle.id);
+                depthAttachmentHandle = RenderTargetHandle.CameraTarget;
+            }
+        }
+    }
+
+    DepthNormalsPass depthNormalsPass;
+    RenderTargetHandle depthNormalsTexture;
+    Material depthNormalsMaterial;
+
+    public override void Create()
+    {
+        depthNormalsMaterial = CoreUtils.CreateEngineMaterial("Hidden/Internal-DepthNormalsTexture");
+        depthNormalsPass = new DepthNormalsPass(RenderQueueRange.opaque, -1, depthNormalsMaterial);
+        depthNormalsPass.renderPassEvent = RenderPassEvent.AfterRenderingPrePasses;
+        depthNormalsTexture.Init("_CameraDepthNormalsTexture");
+    }
+
+    // Here you can inject one or multiple render passes in the renderer.
+    // This method is called when setting up the renderer once per-camera.
+    public override void AddRenderPasses(ScriptableRenderer renderer, ref RenderingData renderingData)
+    {
+        depthNormalsPass.Setup(renderingData.cameraData.cameraTargetDescriptor, depthNormalsTexture);
+        renderer.EnqueuePass(depthNormalsPass);
+    }
+}
+
+

Assets/Shaders/Outline/DepthNormalsFeature.cs.meta

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Assets/Shaders/Outline/Outline.hlsl

@@ -0,0 +1,67 @@
+TEXTURE2D(_CameraColorTexture);
+SAMPLER(sampler_CameraColorTexture);
+float4 _CameraColorTexture_TexelSize;
+
+TEXTURE2D(_CameraDepthTexture);
+SAMPLER(sampler_CameraDepthTexture);
+
+TEXTURE2D(_CameraDepthNormalsTexture);
+SAMPLER(sampler_CameraDepthNormalsTexture);
+ 
+float3 DecodeNormal(float4 enc)
+{
+    float kScale = 1.7777;
+    float3 nn = enc.xyz*float3(2*kScale,2*kScale,0) + float3(-kScale,-kScale,1);
+    float g = 2.0 / dot(nn.xyz,nn.xyz);
+    float3 n;
+    n.xy = g*nn.xy;
+    n.z = g-1;
+    return n;
+}
+
+void Outline_float(float2 UV, float OutlineThickness, float DepthSensitivity, float NormalsSensitivity, float ColorSensitivity, float4 OutlineColor, out float4 Out)
+{
+    float halfScaleFloor = floor(OutlineThickness * 0.5);
+    float halfScaleCeil = ceil(OutlineThickness * 0.5);
+    float2 Texel = (1.0) / float2(_CameraColorTexture_TexelSize.z, _CameraColorTexture_TexelSize.w);
+
+    float2 uvSamples[4];
+    float depthSamples[4];
+    float3 normalSamples[4], colorSamples[4];
+
+    uvSamples[0] = UV - float2(Texel.x, Texel.y) * halfScaleFloor;
+    uvSamples[1] = UV + float2(Texel.x, Texel.y) * halfScaleCeil;
+    uvSamples[2] = UV + float2(Texel.x * halfScaleCeil, -Texel.y * halfScaleFloor);
+    uvSamples[3] = UV + float2(-Texel.x * halfScaleFloor, Texel.y * halfScaleCeil);
+
+    for(int i = 0; i < 4 ; i++)
+    {
+        depthSamples[i] = SAMPLE_TEXTURE2D(_CameraDepthTexture, sampler_CameraDepthTexture, uvSamples[i]).r;
+        normalSamples[i] = DecodeNormal(SAMPLE_TEXTURE2D(_CameraDepthNormalsTexture, sampler_CameraDepthNormalsTexture, uvSamples[i]));
+        colorSamples[i] = SAMPLE_TEXTURE2D(_CameraColorTexture, sampler_CameraColorTexture, uvSamples[i]);
+    }
+
+    // Depth
+    float depthFiniteDifference0 = depthSamples[1] - depthSamples[0];
+    float depthFiniteDifference1 = depthSamples[3] - depthSamples[2];
+    float edgeDepth = sqrt(pow(depthFiniteDifference0, 2) + pow(depthFiniteDifference1, 2)) * 100;
+    float depthThreshold = (1/DepthSensitivity) * depthSamples[0];
+    edgeDepth = edgeDepth > depthThreshold ? 1 : 0;
+
+    // Normals
+    float3 normalFiniteDifference0 = normalSamples[1] - normalSamples[0];
+    float3 normalFiniteDifference1 = normalSamples[3] - normalSamples[2];
+    float edgeNormal = sqrt(dot(normalFiniteDifference0, normalFiniteDifference0) + dot(normalFiniteDifference1, normalFiniteDifference1));
+    edgeNormal = edgeNormal > (1/NormalsSensitivity) ? 1 : 0;
+
+    // Color
+    float3 colorFiniteDifference0 = colorSamples[1] - colorSamples[0];
+    float3 colorFiniteDifference1 = colorSamples[3] - colorSamples[2];
+    float edgeColor = sqrt(dot(colorFiniteDifference0, colorFiniteDifference0) + dot(colorFiniteDifference1, colorFiniteDifference1));
+	edgeColor = edgeColor > (1/ColorSensitivity) ? 1 : 0;
+
+    float edge = max(edgeDepth, max(edgeNormal, edgeColor));
+
+    float4 original = SAMPLE_TEXTURE2D(_CameraColorTexture, sampler_CameraColorTexture, uvSamples[0]);	
+    Out = ((1 - edge) * original) + (edge * lerp(original, OutlineColor,  OutlineColor.a));
+}

Assets/Shaders/Outline/Outline.hlsl.meta

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Assets/Shaders/Outline/OutlineFeature.cs

@@ -0,0 +1,101 @@
+using UnityEngine;
+using UnityEngine.Rendering;
+using UnityEngine.Rendering.Universal;
+
+public class OutlineFeature : ScriptableRendererFeature
+{
+    class OutlinePass : ScriptableRenderPass
+    {
+        private RenderTargetIdentifier source { get; set; }
+        private RenderTargetHandle destination { get; set; }
+        public Material outlineMaterial = null;
+        RenderTargetHandle temporaryColorTexture;
+
+        public void Setup(RenderTargetIdentifier source, RenderTargetHandle destination)
+        {
+            this.source = source;
+            this.destination = destination;
+        }
+
+        public OutlinePass(Material outlineMaterial)
+        {
+            this.outlineMaterial = outlineMaterial;
+        }
+
+
+
+        // This method is called before executing the render pass.
+        // It can be used to configure render targets and their clear state. Also to create temporary render target textures.
+        // When empty this render pass will render to the active camera render target.
+        // You should never call CommandBuffer.SetRenderTarget. Instead call <c>ConfigureTarget</c> and <c>ConfigureClear</c>.
+        // The render pipeline will ensure target setup and clearing happens in an performance manner.
+        public override void Configure(CommandBuffer cmd, RenderTextureDescriptor cameraTextureDescriptor)
+        {
+
+        }
+
+        // Here you can implement the rendering logic.
+        // Use <c>ScriptableRenderContext</c> to issue drawing commands or execute command buffers
+        // https://docs.unity3d.com/ScriptReference/Rendering.ScriptableRenderContext.html
+        // You don't have to call ScriptableRenderContext.submit, the render pipeline will call it at specific points in the pipeline.
+        public override void Execute(ScriptableRenderContext context, ref RenderingData renderingData)
+        {
+            CommandBuffer cmd = CommandBufferPool.Get("_OutlinePass");
+
+            RenderTextureDescriptor opaqueDescriptor = renderingData.cameraData.cameraTargetDescriptor;
+            opaqueDescriptor.depthBufferBits = 0;
+
+            if (destination == RenderTargetHandle.CameraTarget)
+            {
+                cmd.GetTemporaryRT(temporaryColorTexture.id, opaqueDescriptor, FilterMode.Point);
+                Blit(cmd, source, temporaryColorTexture.Identifier(), outlineMaterial, 0);
+                Blit(cmd, temporaryColorTexture.Identifier(), source);
+
+            }
+            else Blit(cmd, source, destination.Identifier(), outlineMaterial, 0);
+
+            context.ExecuteCommandBuffer(cmd);
+            CommandBufferPool.Release(cmd);
+        }
+
+        /// Cleanup any allocated resources that were created during the execution of this render pass.
+        public override void FrameCleanup(CommandBuffer cmd)
+        {
+
+            if (destination == RenderTargetHandle.CameraTarget)
+                cmd.ReleaseTemporaryRT(temporaryColorTexture.id);
+        }
+    }
+
+    [System.Serializable]
+    public class OutlineSettings
+    {
+        public Material outlineMaterial = null;
+    }
+
+    public OutlineSettings settings = new OutlineSettings();
+    OutlinePass outlinePass;
+    RenderTargetHandle outlineTexture;
+
+    public override void Create()
+    {
+        outlinePass = new OutlinePass(settings.outlineMaterial);
+        outlinePass.renderPassEvent = RenderPassEvent.AfterRenderingTransparents;
+        outlineTexture.Init("_OutlineTexture");
+    }
+
+    // Here you can inject one or multiple render passes in the renderer.
+    // This method is called when setting up the renderer once per-camera.
+    public override void AddRenderPasses(ScriptableRenderer renderer, ref RenderingData renderingData)
+    {
+        if (settings.outlineMaterial == null)
+        {
+            Debug.LogWarningFormat("Missing Outline Material");
+            return;
+        }
+        outlinePass.Setup(renderer.cameraColorTarget, RenderTargetHandle.CameraTarget);
+        renderer.EnqueuePass(outlinePass);
+    }
+}
+
+

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+  m_Name: OutlineMat
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+    - Vector1_a15d1ac5e5b0403195aa3cb236acaad4: 1
+    - Vector1_a1bb49bdbd8d42fabeb2fbf4240a2851: 0
+    - Vector1_e9b169a309f047ad9db140790c55f5f3: 1
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-    - _CelShadeSoftness: 0.05
     - _ClearCoatMask: 0
     - _ClearCoatSmoothness: 0
     - _Cull: 2
-    - _Cutoff: 0.379
+    - _Cutoff: 0.5
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-    - _UseAlphaClipping: 0
-    - _UseEmission: 0
-    - _UseOcclusion: 0
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+    - Color_8222ec55b4da40d4aec694ebb08fcb83: {r: 0, g: 0, b: 0, a: 1}
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-    - _OutlineColor: {r: 0, g: 0, b: 0, a: 1}
-    - _ShadowMapColor: {r: 0, g: 0, b: 0, a: 1}
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