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Merge pull request #190 from EvgeniiG/master
Merge pull request #190 from EvgeniiG/master
Specify SSS profiles as assets in the material UI/fptl_cleanup
GitHub
7 年前
当前提交
05d5c60c
共有 14 个文件被更改，包括 660 次插入 和 457 次删除
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100Assets/ScriptableRenderPipeline/HDRenderPipeline/Editor/HDRenderPipelineInspector.cs
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81Assets/ScriptableRenderPipeline/HDRenderPipeline/HDRenderPipeline.asset
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11Assets/ScriptableRenderPipeline/HDRenderPipeline/HDRenderPipeline.cs
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33Assets/ScriptableRenderPipeline/HDRenderPipeline/Material/Lit/Editor/LitUI.cs
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29Assets/ScriptableRenderPipeline/HDRenderPipeline/Material/Lit/Lit.hlsl
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2Assets/ScriptableRenderPipeline/HDRenderPipeline/Material/Lit/Lit.shader
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5Assets/ScriptableRenderPipeline/HDRenderPipeline/Material/Lit/Resources/CombineSubsurfaceScattering.shader
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2Assets/ScriptableRenderPipeline/HDRenderPipeline/SceneSettings/Resources/DrawGaussianProfile.shader
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35Assets/ScriptableRenderPipeline/HDRenderPipeline/Default SSS Profile.asset
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9Assets/ScriptableRenderPipeline/HDRenderPipeline/Default SSS Profile.asset.meta
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490Assets/ScriptableRenderPipeline/HDRenderPipeline/Material/Lit/SubsurfaceScatteringProfile.cs
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12Assets/ScriptableRenderPipeline/HDRenderPipeline/Material/Lit/SubsurfaceScatteringProfile.cs.meta
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300Assets/ScriptableRenderPipeline/HDRenderPipeline/Material/Lit/SubsurfaceScatteringSettings.cs
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8Assets/ScriptableRenderPipeline/HDRenderPipeline/Material/Lit/SubsurfaceScatteringSettings.cs.meta
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m_Script: {fileID: 11500000, guid: a6e7465350bf0d248b4799d98e18cd24, type: 3} |
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m_Name: Default SSS Profile |
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m_EditorClassIdentifier: |
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stdDev1: {r: 0.3, g: 0.3, b: 0.3, a: 0} |
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stdDev2: {r: 0.6, g: 0.6, b: 0.6, a: 0} |
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lerpWeight: 0.5 |
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enableTransmission: 0 |
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thicknessRemap: {x: 0, y: 1} |
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settingsIndex: 0 |
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m_FilterKernel: |
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- {x: 0.09090909, y: 0.09090909, z: 0.09090909, w: -0.7609476} |
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- {x: 0.09090909, y: 0.09090909, z: 0.09090909, w: -0.49358216} |
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- {x: 0.09090909, y: 0.09090909, z: 0.09090909, w: -0.33642715} |
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- {x: 0.09090909, y: 0.09090909, z: 0.09090909, w: -0.21256521} |
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- {x: 0.09090909, y: 0.09090909, z: 0.09090909, w: -0.10326859} |
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- {x: 0.09090909, y: 0.09090909, z: 0.09090909, w: -0.000000048879357} |
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- {x: 0.09090909, y: 0.09090909, z: 0.09090909, w: 0.10326859} |
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- {x: 0.09090909, y: 0.09090909, z: 0.09090909, w: 0.21256521} |
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- {x: 0.09090909, y: 0.09090909, z: 0.09090909, w: 0.33642715} |
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- {x: 0.09090909, y: 0.09090909, z: 0.09090909, w: 0.4935822} |
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- {x: 0.09090909, y: 0.09090909, z: 0.09090909, w: 0.7609475} |
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m_HalfRcpVariances: |
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- {x: 5.5555553, y: 5.5555553, z: 5.5555553} |
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- {x: 1.3888888, y: 1.3888888, z: 1.3888888} |
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m_HalfRcpWeightedVariances: {x: 2.4691355, y: 2.4691355, z: 2.4691355, w: 2.4691355} |
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fileFormatVersion: 2 |
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guid: 09521380d86baee43bf09b32473ea5f3 |
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timeCreated: 1490117690 |
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licenseType: Pro |
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NativeFormatImporter: |
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mainObjectFileID: 11400000 |
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userData: |
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assetBundleName: |
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assetBundleVariant: |
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using System; |
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#if UNITY_EDITOR
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using UnityEditor; |
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#endif
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namespace UnityEngine.Experimental.Rendering.HDPipeline |
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{ |
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[Serializable] |
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public class SubsurfaceScatteringProfile : ScriptableObject |
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{ |
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public const int numSamples = 11; // Must be an odd number
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[SerializeField, ColorUsage(false, true, 0.05f, 2.0f, 1.0f, 1.0f)] |
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public Color stdDev1; |
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[SerializeField, ColorUsage(false, true, 0.05f, 2.0f, 1.0f, 1.0f)] |
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public Color stdDev2; |
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[SerializeField] |
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public float lerpWeight; |
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[SerializeField] |
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public bool enableTransmission; |
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[SerializeField] |
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public Vector2 thicknessRemap; |
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[SerializeField] [HideInInspector] |
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public int settingsIndex; |
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[SerializeField] [HideInInspector] |
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Vector4[] m_FilterKernel; |
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[SerializeField] [HideInInspector] |
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Vector3[] m_HalfRcpVariances; |
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[SerializeField] [HideInInspector] |
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Vector4 m_HalfRcpWeightedVariances; |
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private static SubsurfaceScatteringProfile s_DefaultProfile = null; // Singleton
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// --- Public Methods ---
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public static SubsurfaceScatteringProfile defaultProfile |
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{ |
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get |
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{ |
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if (s_DefaultProfile == null) |
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{ |
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s_DefaultProfile = CreateInstance<SubsurfaceScatteringProfile>(); |
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AssetDatabase.CreateAsset(s_DefaultProfile, "Assets/ScriptableRenderPipeline/HDRenderPipeline/Default SSS Profile.asset"); |
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AssetDatabase.SaveAssets(); |
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} |
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return s_DefaultProfile; |
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} |
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} |
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public SubsurfaceScatteringProfile() |
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{ |
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stdDev1 = new Color(0.3f, 0.3f, 0.3f, 0.0f); |
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stdDev2 = new Color(0.6f, 0.6f, 0.6f, 0.0f); |
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lerpWeight = 0.5f; |
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enableTransmission = false; |
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thicknessRemap = new Vector2(0, 1); |
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settingsIndex = 0; |
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UpdateKernelAndVarianceData(); |
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} |
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public Vector4[] filterKernel |
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{ |
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// Set via UpdateKernelAndVarianceData().
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get { return m_FilterKernel; } |
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} |
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public Vector3[] halfRcpVariances |
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{ |
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// Set via UpdateKernelAndVarianceData().
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get { return m_HalfRcpVariances; } |
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} |
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public Vector4 halfRcpWeightedVariances |
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{ |
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// Set via UpdateKernelAndVarianceData().
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get { return m_HalfRcpWeightedVariances; } |
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} |
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public void UpdateKernelAndVarianceData() |
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{ |
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if (m_FilterKernel == null || m_FilterKernel.Length != numSamples) |
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{ |
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m_FilterKernel = new Vector4[numSamples]; |
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} |
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if (m_HalfRcpVariances == null) |
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{ |
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m_HalfRcpVariances = new Vector3[2]; |
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} |
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// Our goal is to blur the image using a filter which is represented
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// as a product of a linear combination of two normalized 1D Gaussians
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// as suggested by Jimenez et al. in "Separable Subsurface Scattering".
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// A normalized (i.e. energy-preserving) 1D Gaussian with the mean of 0
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// is defined as follows: G1(x, v) = exp(-x * x / (2 * v)) / sqrt(2 * Pi * v),
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// where 'v' is variance and 'x' is the radial distance from the origin.
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// Using the weight 'w', our 1D and the resulting 2D filters are given as:
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// A1(v1, v2, w, x) = G1(x, v1) * (1 - w) + G1(r, v2) * w,
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// A2(v1, v2, w, x, y) = A1(v1, v2, w, x) * A1(v1, v2, w, y).
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// The resulting filter function is a non-Gaussian PDF.
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// It is separable by design, but generally not radially symmetric.
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// Find the widest Gaussian across 3 color channels.
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float maxStdDev1 = Mathf.Max(stdDev1.r, stdDev1.g, stdDev1.b); |
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float maxStdDev2 = Mathf.Max(stdDev2.r, stdDev2.g, stdDev2.b); |
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Vector3 weightSum = new Vector3(0, 0, 0); |
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// Importance sample the linear combination of two Gaussians.
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for (uint i = 0; i < numSamples; i++) |
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{ |
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float u = (i + 0.5f) / numSamples; |
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float pos = GaussianCombinationCdfInverse(u, maxStdDev1, maxStdDev2, lerpWeight); |
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float pdf = GaussianCombination(pos, maxStdDev1, maxStdDev2, lerpWeight); |
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Vector3 val; |
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val.x = GaussianCombination(pos, stdDev1.r, stdDev2.r, lerpWeight); |
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val.y = GaussianCombination(pos, stdDev1.g, stdDev2.g, lerpWeight); |
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val.z = GaussianCombination(pos, stdDev1.b, stdDev2.b, lerpWeight); |
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// We do not divide by 'numSamples' since we will renormalize, anyway.
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m_FilterKernel[i].x = val.x * (1 / pdf); |
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m_FilterKernel[i].y = val.y * (1 / pdf); |
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m_FilterKernel[i].z = val.z * (1 / pdf); |
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m_FilterKernel[i].w = pos; |
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weightSum.x += m_FilterKernel[i].x; |
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weightSum.y += m_FilterKernel[i].y; |
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weightSum.z += m_FilterKernel[i].z; |
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} |
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// Renormalize the weights to conserve energy.
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for (uint i = 0; i < numSamples; i++) |
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{ |
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m_FilterKernel[i].x *= 1 / weightSum.x; |
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m_FilterKernel[i].y *= 1 / weightSum.y; |
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m_FilterKernel[i].z *= 1 / weightSum.z; |
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} |
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// Store (1 / (2 * Variance)) per color channel per Gaussian.
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m_HalfRcpVariances[0].x = 0.5f / (stdDev1.r * stdDev1.r); |
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m_HalfRcpVariances[0].y = 0.5f / (stdDev1.g * stdDev1.g); |
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m_HalfRcpVariances[0].z = 0.5f / (stdDev1.b * stdDev1.b); |
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m_HalfRcpVariances[1].x = 0.5f / (stdDev2.r * stdDev2.r); |
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m_HalfRcpVariances[1].y = 0.5f / (stdDev2.g * stdDev2.g); |
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m_HalfRcpVariances[1].z = 0.5f / (stdDev2.b * stdDev2.b); |
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Vector4 weightedStdDev; |
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weightedStdDev.x = Mathf.Lerp(stdDev1.r, stdDev2.r, lerpWeight); |
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weightedStdDev.y = Mathf.Lerp(stdDev1.g, stdDev2.g, lerpWeight); |
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weightedStdDev.z = Mathf.Lerp(stdDev1.b, stdDev2.b, lerpWeight); |
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weightedStdDev.w = Mathf.Lerp(maxStdDev1, maxStdDev2, lerpWeight); |
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// Store (1 / (2 * WeightedVariance)) per color channel.
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m_HalfRcpWeightedVariances.x = 0.5f / (weightedStdDev.x * weightedStdDev.x); |
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m_HalfRcpWeightedVariances.y = 0.5f / (weightedStdDev.y * weightedStdDev.y); |
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m_HalfRcpWeightedVariances.z = 0.5f / (weightedStdDev.z * weightedStdDev.z); |
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m_HalfRcpWeightedVariances.w = 0.5f / (weightedStdDev.w * weightedStdDev.w); |
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} |
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// --- Private Methods ---
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static float Gaussian(float x, float stdDev) |
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{ |
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float variance = stdDev * stdDev; |
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return Mathf.Exp(-x * x / (2 * variance)) / Mathf.Sqrt(2 * Mathf.PI * variance); |
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} |
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static float GaussianCombination(float x, float stdDev1, float stdDev2, float lerpWeight) |
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{ |
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return Mathf.Lerp(Gaussian(x, stdDev1), Gaussian(x, stdDev2), lerpWeight); |
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} |
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static float RationalApproximation(float t) |
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{ |
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// Abramowitz and Stegun formula 26.2.23.
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// The absolute value of the error should be less than 4.5 e-4.
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float[] c = {2.515517f, 0.802853f, 0.010328f}; |
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float[] d = {1.432788f, 0.189269f, 0.001308f}; |
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return t - ((c[2] * t + c[1]) * t + c[0]) / (((d[2] * t + d[1]) * t + d[0]) * t + 1.0f); |
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} |
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// Ref: https://www.johndcook.com/blog/csharp_phi_inverse/
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static float NormalCdfInverse(float p, float stdDev) |
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{ |
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float x; |
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if (p < 0.5) |
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{ |
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// F^-1(p) = - G^-1(p)
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x = -RationalApproximation(Mathf.Sqrt(-2.0f * Mathf.Log(p))); |
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} |
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else |
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{ |
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// F^-1(p) = G^-1(1-p)
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x = RationalApproximation(Mathf.Sqrt(-2.0f * Mathf.Log(1.0f - p))); |
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} |
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return x * stdDev; |
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} |
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static float GaussianCombinationCdfInverse(float p, float stdDev1, float stdDev2, float lerpWeight) |
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{ |
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return Mathf.Lerp(NormalCdfInverse(p, stdDev1), NormalCdfInverse(p, stdDev2), lerpWeight); |
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} |
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} |
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[Serializable] |
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public class SubsurfaceScatteringSettings |
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{ |
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public enum TexturingMode : int { PreScatter = 0, PostScatter = 1, PreAndPostScatter = 2, MaxValue = 2 }; |
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public const int maxNumProfiles = 8; |
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public int numProfiles; |
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public TexturingMode texturingMode; |
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public int transmissionFlags; |
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public SubsurfaceScatteringProfile[] profiles; |
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public float[] thicknessRemaps; |
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public Vector4[] halfRcpVariancesAndLerpWeights; |
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public Vector4[] halfRcpWeightedVariances; |
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public Vector4[] filterKernels; |
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// --- Public Methods ---
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public SubsurfaceScatteringSettings() |
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{ |
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numProfiles = 1; |
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texturingMode = TexturingMode.PreScatter; |
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profiles = null; |
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thicknessRemaps = null; |
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halfRcpVariancesAndLerpWeights = null; |
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halfRcpWeightedVariances = null; |
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filterKernels = null; |
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} |
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public void OnValidate() |
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{ |
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if (profiles == null) |
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{ |
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// It will be called during the initialization of the HDRenderPipeline.
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CreateProfiles(); |
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} |
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numProfiles = Math.Max(1, Math.Min(profiles.Length, maxNumProfiles)); |
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if (profiles.Length != numProfiles) |
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{ |
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Array.Resize(ref profiles, numProfiles); |
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} |
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for (int i = 0; i < numProfiles; i++) |
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{ |
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if (profiles[i] == null) |
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{ |
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// No invalid/empty assets allowed!
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profiles[i] = SubsurfaceScatteringProfile.defaultProfile; |
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} |
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// Assign profile IDs.
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profiles[i].settingsIndex = i; |
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} |
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texturingMode = (TexturingMode)Math.Max(0, Math.Min((int)texturingMode, (int)TexturingMode.MaxValue)); |
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if (thicknessRemaps == null || thicknessRemaps.Length != (maxNumProfiles * 2)) |
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{ |
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thicknessRemaps = new float[maxNumProfiles * 2]; |
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} |
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if (halfRcpVariancesAndLerpWeights == null || halfRcpVariancesAndLerpWeights.Length != (maxNumProfiles * 2)) |
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{ |
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halfRcpVariancesAndLerpWeights = new Vector4[maxNumProfiles * 2]; |
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} |
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if (halfRcpWeightedVariances == null || halfRcpWeightedVariances.Length != maxNumProfiles) |
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{ |
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halfRcpWeightedVariances = new Vector4[maxNumProfiles]; |
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} |
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if (filterKernels == null || filterKernels.Length != (maxNumProfiles * SubsurfaceScatteringProfile.numSamples)) |
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{ |
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filterKernels = new Vector4[maxNumProfiles * SubsurfaceScatteringProfile.numSamples]; |
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} |
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transmissionFlags = 0; |
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Color c = new Color(); |
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for (int i = 0; i < numProfiles; i++) |
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{ |
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transmissionFlags |= (profiles[i].enableTransmission ? 1 : 0) << i; |
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c.r = Mathf.Clamp(profiles[i].stdDev1.r, 0.05f, 2.0f); |
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c.g = Mathf.Clamp(profiles[i].stdDev1.g, 0.05f, 2.0f); |
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c.b = Mathf.Clamp(profiles[i].stdDev1.b, 0.05f, 2.0f); |
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c.a = 0.0f; |
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profiles[i].stdDev1 = c; |
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c.r = Mathf.Clamp(profiles[i].stdDev2.r, 0.05f, 2.0f); |
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c.g = Mathf.Clamp(profiles[i].stdDev2.g, 0.05f, 2.0f); |
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c.b = Mathf.Clamp(profiles[i].stdDev2.b, 0.05f, 2.0f); |
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c.a = 0.0f; |
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profiles[i].stdDev2 = c; |
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profiles[i].lerpWeight = Mathf.Clamp01(profiles[i].lerpWeight); |
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profiles[i].thicknessRemap.x = Mathf.Clamp(profiles[i].thicknessRemap.x, 0, profiles[i].thicknessRemap.y); |
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profiles[i].thicknessRemap.y = Mathf.Max(profiles[i].thicknessRemap.x, profiles[i].thicknessRemap.y); |
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profiles[i].UpdateKernelAndVarianceData(); |
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} |
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// Use the updated data to fill the cache.
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for (int i = 0; i < numProfiles; i++) |
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{ |
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thicknessRemaps[2 * i] = profiles[i].thicknessRemap.x; |
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thicknessRemaps[2 * i + 1] = profiles[i].thicknessRemap.y - profiles[i].thicknessRemap.x; |
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halfRcpVariancesAndLerpWeights[2 * i] = profiles[i].halfRcpVariances[0]; |
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halfRcpVariancesAndLerpWeights[2 * i].w = 1.0f - profiles[i].lerpWeight; |
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halfRcpVariancesAndLerpWeights[2 * i + 1] = profiles[i].halfRcpVariances[1]; |
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halfRcpVariancesAndLerpWeights[2 * i + 1].w = profiles[i].lerpWeight; |
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halfRcpWeightedVariances[i] = profiles[i].halfRcpWeightedVariances; |
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for (int j = 0, n = SubsurfaceScatteringProfile.numSamples; j < n; j++) |
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{ |
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filterKernels[n * i + j] = profiles[i].filterKernel[j]; |
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} |
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} |
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} |
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// --- Private Methods ---
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// Limitation of Unity - cannot create assets in the constructor.
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public void CreateProfiles() |
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{ |
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profiles = new SubsurfaceScatteringProfile[numProfiles]; |
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for (int i = 0; i < numProfiles; i++) |
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{ |
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profiles[i] = SubsurfaceScatteringProfile.defaultProfile; |
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} |
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} |
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} |
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#if UNITY_EDITOR
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public class SubsurfaceScatteringProfileFactory |
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{ |
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[MenuItem("Assets/Create/Subsurface Scattering Profile", priority = 666)] |
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static void MenuCreateSubsurfaceScatteringProfile() |
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{ |
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Texture2D icon = EditorGUIUtility.FindTexture("ScriptableObject Icon"); |
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ProjectWindowUtil.StartNameEditingIfProjectWindowExists(0, |
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ScriptableObject.CreateInstance<DoCreateSubsurfaceScatteringProfile>(), |
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"New SSS Profile.asset", icon, null); |
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} |
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public static SubsurfaceScatteringProfile CreateSssProfileAtPath(string path) |
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{ |
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var profile = ScriptableObject.CreateInstance<SubsurfaceScatteringProfile>(); |
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profile.name = System.IO.Path.GetFileName(path); |
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AssetDatabase.CreateAsset(profile, path); |
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return profile; |
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} |
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} |
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|
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class DoCreateSubsurfaceScatteringProfile : UnityEditor.ProjectWindowCallback.EndNameEditAction |
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{ |
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public override void Action(int instanceId, string pathName, string resourceFile) |
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{ |
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var profiles = SubsurfaceScatteringProfileFactory.CreateSssProfileAtPath(pathName); |
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ProjectWindowUtil.ShowCreatedAsset(profiles); |
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} |
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} |
|||
|
|||
[CustomEditor(typeof(SubsurfaceScatteringProfile))] |
|||
public class SubsurfaceScatteringProfileEditor : Editor { |
|||
private class Styles |
|||
{ |
|||
public readonly GUIContent sssProfilePreview0 = new GUIContent("Profile preview"); |
|||
public readonly GUIContent sssProfilePreview1 = new GUIContent("Shows the fraction of light scattered from the source as radius increases to 1."); |
|||
public readonly GUIContent sssProfilePreview2 = new GUIContent("Note that the intensity of the region in the center may be clamped."); |
|||
public readonly GUIContent sssTransmittancePreview0 = new GUIContent("Transmittance preview"); |
|||
public readonly GUIContent sssTransmittancePreview1 = new GUIContent("Shows the fraction of light passing through the object as thickness increases to 1."); |
|||
public readonly GUIContent sssProfileStdDev1 = new GUIContent("Standard deviation #1", "Determines the shape of the 1st Gaussian filter. Increases the strength and the radius of the blur of the corresponding color channel."); |
|||
public readonly GUIContent sssProfileStdDev2 = new GUIContent("Standard deviation #2", "Determines the shape of the 2nd Gaussian filter. Increases the strength and the radius of the blur of the corresponding color channel."); |
|||
public readonly GUIContent sssProfileLerpWeight = new GUIContent("Filter interpolation", "Controls linear interpolation between the two Gaussian filters."); |
|||
public readonly GUIContent sssProfileTransmission = new GUIContent("Enable transmission", "Toggles simulation of light passing through thin objects. Depends on the thickness of the material."); |
|||
public readonly GUIContent sssProfileThicknessRemap = new GUIContent("Thickness remap", "Remaps the thickness parameter from [0, 1] to the desired range."); |
|||
|
|||
public readonly GUIStyle centeredMiniBoldLabel = new GUIStyle(GUI.skin.label); |
|||
|
|||
public Styles() |
|||
{ |
|||
centeredMiniBoldLabel.alignment = TextAnchor.MiddleCenter; |
|||
centeredMiniBoldLabel.fontSize = 10; |
|||
centeredMiniBoldLabel.fontStyle = FontStyle.Bold; |
|||
} |
|||
} |
|||
|
|||
private static Styles styles |
|||
{ |
|||
get |
|||
{ |
|||
if (s_Styles == null) |
|||
{ |
|||
s_Styles = new Styles(); |
|||
} |
|||
return s_Styles; |
|||
} |
|||
} |
|||
|
|||
private static Styles s_Styles = null; |
|||
|
|||
private RenderTexture m_ProfileImage, m_TransmittanceImage; |
|||
private Material m_ProfileMaterial, m_TransmittanceMaterial; |
|||
private SerializedProperty m_Profile, m_ProfileStdDev1, m_ProfileStdDev2, |
|||
m_ProfileLerpWeight, m_ProfileTransmission, |
|||
m_ProfileThicknessRemap; |
|||
|
|||
void OnEnable() |
|||
{ |
|||
m_ProfileStdDev1 = serializedObject.FindProperty("stdDev1"); |
|||
m_ProfileStdDev2 = serializedObject.FindProperty("stdDev2"); |
|||
m_ProfileLerpWeight = serializedObject.FindProperty("lerpWeight"); |
|||
m_ProfileTransmission = serializedObject.FindProperty("enableTransmission"); |
|||
m_ProfileThicknessRemap = serializedObject.FindProperty("thicknessRemap"); |
|||
|
|||
m_ProfileMaterial = Utilities.CreateEngineMaterial("Hidden/HDRenderPipeline/DrawGaussianProfile"); |
|||
m_TransmittanceMaterial = Utilities.CreateEngineMaterial("Hidden/HDRenderPipeline/DrawTransmittanceGraph"); |
|||
|
|||
m_ProfileImage = new RenderTexture(256, 256, 0, RenderTextureFormat.DefaultHDR); |
|||
m_TransmittanceImage = new RenderTexture( 16, 256, 0, RenderTextureFormat.DefaultHDR); |
|||
} |
|||
|
|||
public override void OnInspectorGUI() { |
|||
serializedObject.Update(); |
|||
|
|||
EditorGUI.BeginChangeCheck(); |
|||
{ |
|||
EditorGUILayout.PropertyField(m_ProfileStdDev1, styles.sssProfileStdDev1); |
|||
EditorGUILayout.PropertyField(m_ProfileStdDev2, styles.sssProfileStdDev2); |
|||
EditorGUILayout.PropertyField(m_ProfileLerpWeight, styles.sssProfileLerpWeight); |
|||
EditorGUILayout.PropertyField(m_ProfileTransmission, styles.sssProfileTransmission); |
|||
|
|||
Vector2 thicknessRemap = m_ProfileThicknessRemap.vector2Value; |
|||
EditorGUILayout.LabelField("Min thickness: ", thicknessRemap.x.ToString()); |
|||
EditorGUILayout.LabelField("Max thickness: ", thicknessRemap.y.ToString()); |
|||
EditorGUILayout.MinMaxSlider(styles.sssProfileThicknessRemap, ref thicknessRemap.x, ref thicknessRemap.y, 0, 10); |
|||
m_ProfileThicknessRemap.vector2Value = thicknessRemap; |
|||
|
|||
EditorGUILayout.Space(); |
|||
EditorGUILayout.LabelField(styles.sssProfilePreview0, styles.centeredMiniBoldLabel); |
|||
EditorGUILayout.LabelField(styles.sssProfilePreview1, EditorStyles.centeredGreyMiniLabel); |
|||
EditorGUILayout.LabelField(styles.sssProfilePreview2, EditorStyles.centeredGreyMiniLabel); |
|||
EditorGUILayout.Space(); |
|||
} |
|||
|
|||
// Draw the profile.
|
|||
m_ProfileMaterial.SetColor("_StdDev1", m_ProfileStdDev1.colorValue); |
|||
m_ProfileMaterial.SetColor("_StdDev2", m_ProfileStdDev2.colorValue); |
|||
m_ProfileMaterial.SetFloat("_LerpWeight", m_ProfileLerpWeight.floatValue); |
|||
EditorGUI.DrawPreviewTexture(GUILayoutUtility.GetRect(256, 256), m_ProfileImage, m_ProfileMaterial, ScaleMode.ScaleToFit, 1.0f); |
|||
|
|||
EditorGUILayout.Space(); |
|||
EditorGUILayout.LabelField(styles.sssTransmittancePreview0, styles.centeredMiniBoldLabel); |
|||
EditorGUILayout.LabelField(styles.sssTransmittancePreview1, EditorStyles.centeredGreyMiniLabel); |
|||
EditorGUILayout.Space(); |
|||
|
|||
// Draw the transmittance graph.
|
|||
m_TransmittanceMaterial.SetColor("_StdDev1", m_ProfileStdDev1.colorValue); |
|||
m_TransmittanceMaterial.SetColor("_StdDev2", m_ProfileStdDev2.colorValue); |
|||
m_TransmittanceMaterial.SetFloat("_LerpWeight", m_ProfileLerpWeight.floatValue); |
|||
m_TransmittanceMaterial.SetVector("_ThicknessRemap", m_ProfileThicknessRemap.vector2Value); |
|||
EditorGUI.DrawPreviewTexture(GUILayoutUtility.GetRect(16, 16), m_TransmittanceImage, m_TransmittanceMaterial, ScaleMode.ScaleToFit, 16.0f); |
|||
|
|||
serializedObject.ApplyModifiedProperties(); |
|||
|
|||
if (EditorGUI.EndChangeCheck()) |
|||
{ |
|||
// Validate each individual asset and update caches.
|
|||
HDRenderPipelineInstance hdPipeline = RenderPipelineManager.currentPipeline as HDRenderPipelineInstance; |
|||
hdPipeline.sssSettings.OnValidate(); |
|||
} |
|||
} |
|||
} |
|||
#endif
|
|||
} |
|||
|
|||
fileFormatVersion: 2 |
|||
guid: a6e7465350bf0d248b4799d98e18cd24 |
|||
timeCreated: 1490016484 |
|||
licenseType: Pro |
|||
MonoImporter: |
|||
serializedVersion: 2 |
|||
defaultReferences: [] |
|||
executionOrder: 0 |
|||
icon: {instanceID: 0} |
|||
userData: |
|||
assetBundleName: |
|||
assetBundleVariant: |
|||
|
|||
using System; |
|||
using UnityEngine.Rendering; |
|||
#if UNITY_EDITOR
|
|||
using UnityEditor; |
|||
#endif
|
|||
|
|||
namespace UnityEngine.Experimental.Rendering.HDPipeline |
|||
{ |
|||
[Serializable] |
|||
public class SubsurfaceScatteringProfile |
|||
{ |
|||
public const int numSamples = 11; // Must be an odd number
|
|||
|
|||
[SerializeField, ColorUsage(false, true, 0.05f, 2.0f, 1.0f, 1.0f)] |
|||
public Color stdDev1; |
|||
[SerializeField, ColorUsage(false, true, 0.05f, 2.0f, 1.0f, 1.0f)] |
|||
public Color stdDev2; |
|||
[SerializeField] |
|||
public float lerpWeight; |
|||
[SerializeField] |
|||
public bool enableTransmission; |
|||
[SerializeField] |
|||
public Vector2 thicknessRemap; |
|||
[SerializeField] [HideInInspector] |
|||
Vector4[] m_FilterKernel; |
|||
[SerializeField] [HideInInspector] |
|||
Vector3[] m_HalfRcpVariances; |
|||
[SerializeField] [HideInInspector] |
|||
Vector4 m_HalfRcpWeightedVariances; |
|||
|
|||
// --- Public Methods ---
|
|||
|
|||
public SubsurfaceScatteringProfile() |
|||
{ |
|||
stdDev1 = new Color(0.3f, 0.3f, 0.3f, 0.0f); |
|||
stdDev2 = new Color(0.6f, 0.6f, 0.6f, 0.0f); |
|||
lerpWeight = 0.5f; |
|||
enableTransmission = false; |
|||
thicknessRemap = new Vector2(0, 3); |
|||
|
|||
UpdateKernelAndVarianceData(); |
|||
} |
|||
|
|||
public Vector4[] filterKernel |
|||
{ |
|||
// Set via UpdateKernelAndVarianceData().
|
|||
get { return m_FilterKernel; } |
|||
} |
|||
|
|||
public Vector3[] halfRcpVariances |
|||
{ |
|||
// Set via UpdateKernelAndVarianceData().
|
|||
get { return m_HalfRcpVariances; } |
|||
} |
|||
|
|||
public Vector4 halfRcpWeightedVariances |
|||
{ |
|||
// Set via UpdateKernelAndVarianceData().
|
|||
get { return m_HalfRcpWeightedVariances; } |
|||
} |
|||
|
|||
public void UpdateKernelAndVarianceData() |
|||
{ |
|||
if (m_FilterKernel == null || m_FilterKernel.Length != numSamples) |
|||
{ |
|||
m_FilterKernel = new Vector4[numSamples]; |
|||
} |
|||
|
|||
if (m_HalfRcpVariances == null) |
|||
{ |
|||
m_HalfRcpVariances = new Vector3[2]; |
|||
} |
|||
|
|||
// Our goal is to blur the image using a filter which is represented
|
|||
// as a product of a linear combination of two normalized 1D Gaussians
|
|||
// as suggested by Jimenez et al. in "Separable Subsurface Scattering".
|
|||
// A normalized (i.e. energy-preserving) 1D Gaussian with the mean of 0
|
|||
// is defined as follows: G1(x, v) = exp(-x * x / (2 * v)) / sqrt(2 * Pi * v),
|
|||
// where 'v' is variance and 'x' is the radial distance from the origin.
|
|||
// Using the weight 'w', our 1D and the resulting 2D filters are given as:
|
|||
// A1(v1, v2, w, x) = G1(x, v1) * (1 - w) + G1(r, v2) * w,
|
|||
// A2(v1, v2, w, x, y) = A1(v1, v2, w, x) * A1(v1, v2, w, y).
|
|||
// The resulting filter function is a non-Gaussian PDF.
|
|||
// It is separable by design, but generally not radially symmetric.
|
|||
|
|||
// Find the widest Gaussian across 3 color channels.
|
|||
float maxStdDev1 = Mathf.Max(stdDev1.r, stdDev1.g, stdDev1.b); |
|||
float maxStdDev2 = Mathf.Max(stdDev2.r, stdDev2.g, stdDev2.b); |
|||
|
|||
Vector3 weightSum = new Vector3(0, 0, 0); |
|||
|
|||
// Importance sample the linear combination of two Gaussians.
|
|||
for (uint i = 0; i < numSamples; i++) |
|||
{ |
|||
float u = (i + 0.5f) / numSamples; |
|||
float pos = GaussianCombinationCdfInverse(u, maxStdDev1, maxStdDev2, lerpWeight); |
|||
float pdf = GaussianCombination(pos, maxStdDev1, maxStdDev2, lerpWeight); |
|||
|
|||
Vector3 val; |
|||
val.x = GaussianCombination(pos, stdDev1.r, stdDev2.r, lerpWeight); |
|||
val.y = GaussianCombination(pos, stdDev1.g, stdDev2.g, lerpWeight); |
|||
val.z = GaussianCombination(pos, stdDev1.b, stdDev2.b, lerpWeight); |
|||
|
|||
// We do not divide by 'numSamples' since we will renormalize, anyway.
|
|||
m_FilterKernel[i].x = val.x * (1 / pdf); |
|||
m_FilterKernel[i].y = val.y * (1 / pdf); |
|||
m_FilterKernel[i].z = val.z * (1 / pdf); |
|||
m_FilterKernel[i].w = pos; |
|||
|
|||
weightSum.x += m_FilterKernel[i].x; |
|||
weightSum.y += m_FilterKernel[i].y; |
|||
weightSum.z += m_FilterKernel[i].z; |
|||
} |
|||
|
|||
// Renormalize the weights to conserve energy.
|
|||
for (uint i = 0; i < numSamples; i++) |
|||
{ |
|||
m_FilterKernel[i].x *= 1 / weightSum.x; |
|||
m_FilterKernel[i].y *= 1 / weightSum.y; |
|||
m_FilterKernel[i].z *= 1 / weightSum.z; |
|||
} |
|||
|
|||
// Store (1 / (2 * Variance)) per color channel per Gaussian.
|
|||
m_HalfRcpVariances[0].x = 0.5f / (stdDev1.r * stdDev1.r); |
|||
m_HalfRcpVariances[0].y = 0.5f / (stdDev1.g * stdDev1.g); |
|||
m_HalfRcpVariances[0].z = 0.5f / (stdDev1.b * stdDev1.b); |
|||
m_HalfRcpVariances[1].x = 0.5f / (stdDev2.r * stdDev2.r); |
|||
m_HalfRcpVariances[1].y = 0.5f / (stdDev2.g * stdDev2.g); |
|||
m_HalfRcpVariances[1].z = 0.5f / (stdDev2.b * stdDev2.b); |
|||
|
|||
Vector4 weightedStdDev; |
|||
weightedStdDev.x = Mathf.Lerp(stdDev1.r, stdDev2.r, lerpWeight); |
|||
weightedStdDev.y = Mathf.Lerp(stdDev1.g, stdDev2.g, lerpWeight); |
|||
weightedStdDev.z = Mathf.Lerp(stdDev1.b, stdDev2.b, lerpWeight); |
|||
weightedStdDev.w = Mathf.Lerp(maxStdDev1, maxStdDev2, lerpWeight); |
|||
|
|||
// Store (1 / (2 * WeightedVariance)) per color channel.
|
|||
m_HalfRcpWeightedVariances.x = 0.5f / (weightedStdDev.x * weightedStdDev.x); |
|||
m_HalfRcpWeightedVariances.y = 0.5f / (weightedStdDev.y * weightedStdDev.y); |
|||
m_HalfRcpWeightedVariances.z = 0.5f / (weightedStdDev.z * weightedStdDev.z); |
|||
m_HalfRcpWeightedVariances.w = 0.5f / (weightedStdDev.w * weightedStdDev.w); |
|||
} |
|||
|
|||
// --- Private Methods ---
|
|||
|
|||
static float Gaussian(float x, float stdDev) |
|||
{ |
|||
float variance = stdDev * stdDev; |
|||
return Mathf.Exp(-x * x / (2 * variance)) / Mathf.Sqrt(2 * Mathf.PI * variance); |
|||
} |
|||
|
|||
static float GaussianCombination(float x, float stdDev1, float stdDev2, float lerpWeight) |
|||
{ |
|||
return Mathf.Lerp(Gaussian(x, stdDev1), Gaussian(x, stdDev2), lerpWeight); |
|||
} |
|||
|
|||
static float RationalApproximation(float t) |
|||
{ |
|||
// Abramowitz and Stegun formula 26.2.23.
|
|||
// The absolute value of the error should be less than 4.5 e-4.
|
|||
float[] c = {2.515517f, 0.802853f, 0.010328f}; |
|||
float[] d = {1.432788f, 0.189269f, 0.001308f}; |
|||
return t - ((c[2] * t + c[1]) * t + c[0]) / (((d[2] * t + d[1]) * t + d[0]) * t + 1.0f); |
|||
} |
|||
|
|||
// Ref: https://www.johndcook.com/blog/csharp_phi_inverse/
|
|||
static float NormalCdfInverse(float p, float stdDev) |
|||
{ |
|||
float x; |
|||
|
|||
if (p < 0.5) |
|||
{ |
|||
// F^-1(p) = - G^-1(p)
|
|||
x = -RationalApproximation(Mathf.Sqrt(-2.0f * Mathf.Log(p))); |
|||
} |
|||
else |
|||
{ |
|||
// F^-1(p) = G^-1(1-p)
|
|||
x = RationalApproximation(Mathf.Sqrt(-2.0f * Mathf.Log(1.0f - p))); |
|||
} |
|||
|
|||
return x * stdDev; |
|||
} |
|||
|
|||
static float GaussianCombinationCdfInverse(float p, float stdDev1, float stdDev2, float lerpWeight) |
|||
{ |
|||
return Mathf.Lerp(NormalCdfInverse(p, stdDev1), NormalCdfInverse(p, stdDev2), lerpWeight); |
|||
} |
|||
} |
|||
|
|||
[Serializable] |
|||
public class SubsurfaceScatteringSettings |
|||
{ |
|||
public enum TexturingMode : int { PreScatter = 0, PostScatter = 1, PreAndPostScatter = 2, MaxValue = 2 }; |
|||
|
|||
public const int maxNumProfiles = 8; |
|||
|
|||
public int numProfiles; |
|||
public TexturingMode texturingMode; |
|||
public int transmissionFlags; |
|||
public SubsurfaceScatteringProfile[] profiles; |
|||
public float[] thicknessRemaps; |
|||
public Vector4[] halfRcpVariancesAndLerpWeights; |
|||
public Vector4[] halfRcpWeightedVariances; |
|||
public Vector4[] filterKernels; |
|||
|
|||
// --- Public Methods ---
|
|||
|
|||
public SubsurfaceScatteringSettings() |
|||
{ |
|||
numProfiles = 1; |
|||
texturingMode = 0; |
|||
profiles = new SubsurfaceScatteringProfile[numProfiles]; |
|||
|
|||
for (int i = 0; i < numProfiles; i++) |
|||
{ |
|||
profiles[i] = new SubsurfaceScatteringProfile(); |
|||
} |
|||
|
|||
OnValidate(); |
|||
} |
|||
|
|||
public void OnValidate() |
|||
{ |
|||
if (profiles.Length > maxNumProfiles) |
|||
{ |
|||
Array.Resize(ref profiles, maxNumProfiles); |
|||
} |
|||
|
|||
numProfiles = profiles.Length; |
|||
texturingMode = (TexturingMode)Math.Max(0, Math.Min((int)texturingMode, (int)TexturingMode.MaxValue)); |
|||
|
|||
if (thicknessRemaps == null) |
|||
{ |
|||
thicknessRemaps = new float[maxNumProfiles * 2]; |
|||
} |
|||
|
|||
if (halfRcpVariancesAndLerpWeights == null) |
|||
{ |
|||
halfRcpVariancesAndLerpWeights = new Vector4[maxNumProfiles * 2]; |
|||
} |
|||
|
|||
if (halfRcpWeightedVariances == null) |
|||
{ |
|||
halfRcpWeightedVariances = new Vector4[maxNumProfiles]; |
|||
} |
|||
|
|||
if (filterKernels == null || filterKernels.Length != (maxNumProfiles * SubsurfaceScatteringProfile.numSamples)) |
|||
{ |
|||
filterKernels = new Vector4[maxNumProfiles * SubsurfaceScatteringProfile.numSamples]; |
|||
} |
|||
|
|||
transmissionFlags = 0; |
|||
Color c = new Color(); |
|||
|
|||
for (int i = 0; i < numProfiles; i++) |
|||
{ |
|||
transmissionFlags |= (profiles[i].enableTransmission ? 1 : 0) << i; |
|||
|
|||
c.r = Mathf.Clamp(profiles[i].stdDev1.r, 0.05f, 2.0f); |
|||
c.g = Mathf.Clamp(profiles[i].stdDev1.g, 0.05f, 2.0f); |
|||
c.b = Mathf.Clamp(profiles[i].stdDev1.b, 0.05f, 2.0f); |
|||
c.a = 0.0f; |
|||
|
|||
profiles[i].stdDev1 = c; |
|||
|
|||
c.r = Mathf.Clamp(profiles[i].stdDev2.r, 0.05f, 2.0f); |
|||
c.g = Mathf.Clamp(profiles[i].stdDev2.g, 0.05f, 2.0f); |
|||
c.b = Mathf.Clamp(profiles[i].stdDev2.b, 0.05f, 2.0f); |
|||
c.a = 0.0f; |
|||
|
|||
profiles[i].stdDev2 = c; |
|||
|
|||
profiles[i].lerpWeight = Mathf.Clamp01(profiles[i].lerpWeight); |
|||
|
|||
profiles[i].thicknessRemap.x = Mathf.Clamp(profiles[i].thicknessRemap.x, 0, profiles[i].thicknessRemap.y); |
|||
profiles[i].thicknessRemap.y = Mathf.Max(profiles[i].thicknessRemap.x, profiles[i].thicknessRemap.y); |
|||
|
|||
profiles[i].UpdateKernelAndVarianceData(); |
|||
} |
|||
|
|||
// Use the updated data to fill the cache.
|
|||
for (int i = 0; i < numProfiles; i++) |
|||
{ |
|||
thicknessRemaps[2 * i] = profiles[i].thicknessRemap.x; |
|||
thicknessRemaps[2 * i + 1] = profiles[i].thicknessRemap.y - profiles[i].thicknessRemap.x; |
|||
halfRcpVariancesAndLerpWeights[2 * i] = profiles[i].halfRcpVariances[0]; |
|||
halfRcpVariancesAndLerpWeights[2 * i].w = 1.0f - profiles[i].lerpWeight; |
|||
halfRcpVariancesAndLerpWeights[2 * i + 1] = profiles[i].halfRcpVariances[1]; |
|||
halfRcpVariancesAndLerpWeights[2 * i + 1].w = profiles[i].lerpWeight; |
|||
halfRcpWeightedVariances[i] = profiles[i].halfRcpWeightedVariances; |
|||
|
|||
for (int j = 0, n = SubsurfaceScatteringProfile.numSamples; j < n; j++) |
|||
{ |
|||
filterKernels[n * i + j] = profiles[i].filterKernel[j]; |
|||
} |
|||
} |
|||
} |
|||
} |
|||
} |
|||
|
|||
fileFormatVersion: 2 |
|||
guid: cccb0727e6924014ebb35773fbfed141 |
|||
timeCreated: 1487685614 |
|||
licenseType: Pro |
|||
DefaultImporter: |
|||
userData: |
|||
assetBundleName: |
|||
assetBundleVariant: |
|||
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