From aa06908024a3b35a0d59c968dda41ffd43f058f8 Mon Sep 17 00:00:00 2001 From: antonmic Date: Sat, 17 Apr 2021 09:52:04 -0700 Subject: [PATCH] Updated EnhancedPBR and touched up some includes --- .../Materials/Types/EnhancedPBR_Common.azsli | 1 + .../Types/EnhancedPBR_DepthPass_WithPS.azsl | 1 - .../Types/EnhancedPBR_ForwardPass.azsl | 151 ++++++++++++++---- .../Types/EnhancedPBR_Shadowmap_WithPS.azsl | 1 - .../Common/Assets/Materials/Types/Skin.azsl | 1 + .../StandardMultilayerPBR_ForwardPass.azsl | 20 ++- .../Materials/Types/StandardPBR_Common.azsli | 1 + .../Types/StandardPBR_DepthPass_WithPS.azsl | 1 - .../Types/StandardPBR_ForwardPass.azsl | 30 +++- .../Types/StandardPBR_Shadowmap_WithPS.azsl | 1 - .../Atom/Features/PBR/BackLighting.azsli | 18 ++- .../ShaderLib/Atom/Features/PBR/Decals.azsli | 40 ++--- .../PBR/Lighting/EnhancedLighting.azsli | 119 ++++++++++++++ .../Features/PBR/Lighting/SkinLighting.azsli | 119 ++++++++++++++ .../PBR/Lighting/StandardLighting.azsli | 68 +++++++- .../Atom/Features/PBR/LightingModel.azsli | 24 --- .../PBR/Lights/LightTypesCommon.azsli | 62 ------- .../Atom/Features/PBR/Microfacet/Brdf.azsli | 4 - .../ShaderLib/Atom/Features/PBR/Surface.azsli | 68 -------- .../PBR/Surfaces/BasePbrSurfaceData.azsli | 3 + .../PBR/Surfaces/EnhancedSurface.azsli | 91 +++++++++++ .../Features/PBR/Surfaces/SkinSurface.azsli | 91 +++++++++++ .../Atom/Features/Vertex/VertexHelper.azsli | 7 +- 23 files changed, 687 insertions(+), 235 deletions(-) create mode 100644 Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/Lighting/EnhancedLighting.azsli create mode 100644 Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/Lighting/SkinLighting.azsli delete mode 100644 Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/Surface.azsli create mode 100644 Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/Surfaces/EnhancedSurface.azsli create mode 100644 Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/Surfaces/SkinSurface.azsli diff --git a/Gems/Atom/Feature/Common/Assets/Materials/Types/EnhancedPBR_Common.azsli b/Gems/Atom/Feature/Common/Assets/Materials/Types/EnhancedPBR_Common.azsli index fd6961c50d..f9bfb75fea 100644 --- a/Gems/Atom/Feature/Common/Assets/Materials/Types/EnhancedPBR_Common.azsli +++ b/Gems/Atom/Feature/Common/Assets/Materials/Types/EnhancedPBR_Common.azsli @@ -13,6 +13,7 @@ #pragma once #include +#include #include #include "MaterialInputs/BaseColorInput.azsli" diff --git a/Gems/Atom/Feature/Common/Assets/Materials/Types/EnhancedPBR_DepthPass_WithPS.azsl b/Gems/Atom/Feature/Common/Assets/Materials/Types/EnhancedPBR_DepthPass_WithPS.azsl index 81601860ed..28968b5941 100644 --- a/Gems/Atom/Feature/Common/Assets/Materials/Types/EnhancedPBR_DepthPass_WithPS.azsl +++ b/Gems/Atom/Feature/Common/Assets/Materials/Types/EnhancedPBR_DepthPass_WithPS.azsl @@ -10,7 +10,6 @@ * */ -#include #include #include "./EnhancedPBR_Common.azsli" #include diff --git a/Gems/Atom/Feature/Common/Assets/Materials/Types/EnhancedPBR_ForwardPass.azsl b/Gems/Atom/Feature/Common/Assets/Materials/Types/EnhancedPBR_ForwardPass.azsl index a9d6f243c1..d0d060a4be 100644 --- a/Gems/Atom/Feature/Common/Assets/Materials/Types/EnhancedPBR_ForwardPass.azsl +++ b/Gems/Atom/Feature/Common/Assets/Materials/Types/EnhancedPBR_ForwardPass.azsl @@ -10,11 +10,25 @@ * */ -#include #include "EnhancedPBR_Common.azsli" + +// SRGs #include +#include + +// Pass Output #include + +// Utility #include +#include + +// Custom Surface & Lighting +#include + +// Decals +#include + // ---------- Material Parameters ---------- @@ -39,6 +53,8 @@ COMMON_OPTIONS_DETAIL_MAPS() #include "MaterialInputs/TransmissionInput.azsli" +// ---------- Vertex Shader ---------- + struct VSInput { // Base fields (required by the template azsli file)... @@ -67,8 +83,6 @@ struct VSOutput float2 m_detailUv[UvSetCount] : UV3; }; -#include -#include #include VSOutput EnhancedPbr_ForwardPassVS(VSInput IN) @@ -94,6 +108,9 @@ VSOutput EnhancedPbr_ForwardPassVS(VSInput IN) return OUT; } + +// ---------- Pixel Shader ---------- + PbrLightingOutput ForwardPassPS_Common(VSOutput IN, bool isFrontFace, out float depth) { // ------- Tangents & Bitangets ------- @@ -144,6 +161,9 @@ PbrLightingOutput ForwardPassPS_Common(VSOutput IN, bool isFrontFace, out float } } + Surface surface; + surface.position = IN.m_worldPosition; + // ------- Alpha & Clip ------- float2 baseColorUv = IN.m_uv[MaterialSrg::m_baseColorMapUvIndex]; @@ -172,7 +192,7 @@ PbrLightingOutput ForwardPassPS_Common(VSOutput IN, bool isFrontFace, out float float3x3 uvMatrix = MaterialSrg::m_normalMapUvIndex == 0 ? MaterialSrg::m_uvMatrix : CreateIdentity3x3(); // By design, only UV0 is allowed to apply transforms. float detailLayerNormalFactor = MaterialSrg::m_detail_normal_factor * detailLayerBlendFactor; - float3 normal = GetDetailedNormalInputWS( + surface.normal = GetDetailedNormalInputWS( isFrontFace, IN.m_normal, tangents[MaterialSrg::m_normalMapUvIndex], bitangents[MaterialSrg::m_normalMapUvIndex], MaterialSrg::m_normalMap, MaterialSrg::m_sampler, normalUv, MaterialSrg::m_normalFactor, MaterialSrg::m_flipNormalX, MaterialSrg::m_flipNormalY, uvMatrix, o_normal_useTexture, tangents[MaterialSrg::m_detail_allMapsUvIndex], bitangents[MaterialSrg::m_detail_allMapsUvIndex], MaterialSrg::m_detail_normal_texture, MaterialSrg::m_sampler, detailUv, detailLayerNormalFactor, MaterialSrg::m_detail_normal_flipX, MaterialSrg::m_detail_normal_flipY, MaterialSrg::m_detailUvMatrix, o_detail_normal_useTexture); @@ -196,26 +216,20 @@ PbrLightingOutput ForwardPassPS_Common(VSOutput IN, bool isFrontFace, out float metallic = GetMetallicInput(MaterialSrg::m_metallicMap, MaterialSrg::m_sampler, metallicUv, MaterialSrg::m_metallicFactor, o_metallic_useTexture); } - // ------- Roughness ------- - - float2 roughnessUv = IN.m_uv[MaterialSrg::m_roughnessMapUvIndex]; - float roughness = GetRoughnessInput(MaterialSrg::m_roughnessMap, MaterialSrg::m_sampler, roughnessUv, MaterialSrg::m_roughnessFactor, - MaterialSrg::m_roughnessLowerBound, MaterialSrg::m_roughnessUpperBound, o_roughness_useTexture); - // ------- Specular ------- float2 specularUv = IN.m_uv[MaterialSrg::m_specularF0MapUvIndex]; - float specularF0Factor = GetSpecularInput(MaterialSrg::m_specularF0Map, MaterialSrg::m_sampler, specularUv, MaterialSrg::m_specularF0Factor, o_specularF0_useTexture); + float specularF0 = GetSpecularInput(MaterialSrg::m_specularF0Map, MaterialSrg::m_sampler, specularUv, MaterialSrg::m_specularF0Factor, o_specularF0_useTexture); - // ------- Emissive ------- + surface.SetAlbedoAndSpecularF0(baseColor, specularF0, metallic); - float2 emissiveUv = IN.m_uv[MaterialSrg::m_emissiveMapUvIndex]; - float3 emissive = GetEmissiveInput(MaterialSrg::m_emissiveMap, MaterialSrg::m_sampler, emissiveUv, MaterialSrg::m_emissiveIntensity, MaterialSrg::m_emissiveColor.rgb, o_emissiveEnabled, o_emissive_useTexture); + // ------- Roughness ------- - // ------- Occlusion ------- + float2 roughnessUv = IN.m_uv[MaterialSrg::m_roughnessMapUvIndex]; + surface.roughnessLinear = GetRoughnessInput(MaterialSrg::m_roughnessMap, MaterialSrg::m_sampler, roughnessUv, MaterialSrg::m_roughnessFactor, + MaterialSrg::m_roughnessLowerBound, MaterialSrg::m_roughnessUpperBound, o_roughness_useTexture); - float2 occlusionUv = IN.m_uv[MaterialSrg::m_ambientOcclusionMapUvIndex]; - float occlusion = GetOcclusionInput(MaterialSrg::m_ambientOcclusionMap, MaterialSrg::m_sampler, occlusionUv, MaterialSrg::m_ambientOcclusionFactor, o_ambientOcclusion_useTexture); + surface.CalculateRoughnessA(); // ------- Subsurface ------- @@ -226,33 +240,100 @@ PbrLightingOutput ForwardPassPS_Common(VSOutput IN, bool isFrontFace, out float float2 transmissionUv = IN.m_uv[MaterialSrg::m_transmissionThicknessMapUvIndex]; float4 transmissionTintThickness = GeTransmissionInput(MaterialSrg::m_transmissionThicknessMap, MaterialSrg::m_sampler, transmissionUv, MaterialSrg::m_transmissionTintThickness); + surface.transmission.tint = transmissionTintThickness.rgb; + surface.transmission.thickness = transmissionTintThickness.w; + surface.transmission.transmissionParams = MaterialSrg::m_transmissionParams; + + // ------- Anisotropy ------- + + if (o_enableAnisotropy) + { + // Convert the angle from [0..1] = [0 .. 180 degrees] to radians [0 .. PI] + const float anisotropyAngle = MaterialSrg::m_anisotropicAngle * PI; + const float anisotropyFactor = MaterialSrg::m_anisotropicFactor; + surface.anisotropy.Init(surface.normal, tangents[0], bitangents[0], anisotropyAngle, anisotropyFactor, surface.roughnessA); + } + + // ------- Lighting Data ------- + + LightingData lightingData; + + // Light iterator + lightingData.tileIterator.Init(IN.m_position, PassSrg::m_lightListRemapped, PassSrg::m_tileLightData); + lightingData.Init(surface.position, surface.normal, surface.roughnessLinear); + + // Directional light shadow coordinates + lightingData.shadowCoords = IN.m_shadowCoords; + + + // ------- Emissive ------- + + float2 emissiveUv = IN.m_uv[MaterialSrg::m_emissiveMapUvIndex]; + lightingData.emissiveLighting = GetEmissiveInput(MaterialSrg::m_emissiveMap, MaterialSrg::m_sampler, emissiveUv, MaterialSrg::m_emissiveIntensity, MaterialSrg::m_emissiveColor.rgb, o_emissiveEnabled, o_emissive_useTexture); + + // ------- Occlusion ------- + + float2 occlusionUv = IN.m_uv[MaterialSrg::m_ambientOcclusionMapUvIndex]; + lightingData.occlusion = GetOcclusionInput(MaterialSrg::m_ambientOcclusionMap, MaterialSrg::m_sampler, occlusionUv, MaterialSrg::m_ambientOcclusionFactor, o_ambientOcclusion_useTexture); // ------- Clearcoat ------- - float clearCoatFactor = 0.0; - float clearCoatRoughness = 0.0; - float3 clearCoatNormal = float3(0.0, 0.0, 0.0); - // TODO: Clean up the double uses of these clear coat flags - if(o_clearCoat_enabled && o_clearCoat_feature_enabled) + // [GFX TODO][ATOM-14603]: Clean up the double uses of these clear coat flags + if(o_clearCoat_feature_enabled) { - float3x3 uvMatrix = MaterialSrg::m_clearCoatNormalMapUvIndex == 0 ? MaterialSrg::m_uvMatrix : CreateIdentity3x3(); - GetClearCoatInputs(MaterialSrg::m_clearCoatInfluenceMap, IN.m_uv[MaterialSrg::m_clearCoatInfluenceMapUvIndex], MaterialSrg::m_clearCoatFactor, o_clearCoat_factor_useTexture, - MaterialSrg::m_clearCoatRoughnessMap, IN.m_uv[MaterialSrg::m_clearCoatRoughnessMapUvIndex], MaterialSrg::m_clearCoatRoughness, o_clearCoat_roughness_useTexture, - MaterialSrg::m_clearCoatNormalMap, IN.m_uv[MaterialSrg::m_clearCoatNormalMapUvIndex], IN.m_normal, o_clearCoat_normal_useTexture, MaterialSrg::m_clearCoatNormalStrength, - uvMatrix, tangents[MaterialSrg::m_clearCoatNormalMapUvIndex], bitangents[MaterialSrg::m_clearCoatNormalMapUvIndex], - MaterialSrg::m_sampler, isFrontFace, - clearCoatFactor, clearCoatRoughness, clearCoatNormal); + if(o_clearCoat_enabled) + { + float3x3 uvMatrix = MaterialSrg::m_clearCoatNormalMapUvIndex == 0 ? MaterialSrg::m_uvMatrix : CreateIdentity3x3(); + GetClearCoatInputs(MaterialSrg::m_clearCoatInfluenceMap, IN.m_uv[MaterialSrg::m_clearCoatInfluenceMapUvIndex], MaterialSrg::m_clearCoatFactor, o_clearCoat_factor_useTexture, + MaterialSrg::m_clearCoatRoughnessMap, IN.m_uv[MaterialSrg::m_clearCoatRoughnessMapUvIndex], MaterialSrg::m_clearCoatRoughness, o_clearCoat_roughness_useTexture, + MaterialSrg::m_clearCoatNormalMap, IN.m_uv[MaterialSrg::m_clearCoatNormalMapUvIndex], IN.m_normal, o_clearCoat_normal_useTexture, MaterialSrg::m_clearCoatNormalStrength, + uvMatrix, tangents[MaterialSrg::m_clearCoatNormalMapUvIndex], bitangents[MaterialSrg::m_clearCoatNormalMapUvIndex], + MaterialSrg::m_sampler, isFrontFace, + surface.clearCoat.factor, surface.clearCoat.roughness, surface.clearCoat.normal); + } + + // manipulate base layer f0 if clear coat is enabled + // modify base layer's normal incidence reflectance + // for the derivation of the following equation please refer to: + // https://google.github.io/filament/Filament.md.html#materialsystem/clearcoatmodel/baselayermodification + float3 f0 = (1.0 - 5.0 * sqrt(surface.specularF0)) / (5.0 - sqrt(surface.specularF0)); + surface.specularF0 = lerp(surface.specularF0, f0 * f0, surface.clearCoat.factor); } + + // Diffuse and Specular response (used in IBL calculations) + lightingData.specularResponse = FresnelSchlickWithRoughness(lightingData.NdotV, surface.specularF0, surface.roughnessLinear); + lightingData.diffuseResponse = 1.0 - lightingData.specularResponse; + + if(o_clearCoat_feature_enabled) + { + // Clear coat layer has fixed IOR = 1.5 and transparent => F0 = (1.5 - 1)^2 / (1.5 + 1)^2 = 0.04 + lightingData.diffuseResponse *= 1.0 - (FresnelSchlickWithRoughness(lightingData.NdotV, float3(0.04, 0.04, 0.04), surface.clearCoat.roughness) * surface.clearCoat.factor); + } + + // ------- Multiscatter ------- + + lightingData.CalculateMultiscatterCompensation(surface.specularF0, o_specularF0_enableMultiScatterCompensation); // ------- Lighting Calculation ------- - // Convert the angle from [0..1] = [0 .. 180 degrees] to radians [0 .. PI] - const float2 anisotropy = float2(MaterialSrg::m_anisotropicAngle * PI, MaterialSrg::m_anisotropicFactor); + // Apply Decals + ApplyDecals(lightingData.tileIterator, surface); - PbrLightingOutput lightingOutput = PbrLighting(IN, - baseColor, metallic, roughness, specularF0Factor, - normal, IN.m_tangent, IN.m_bitangent, anisotropy, - emissive, occlusion, transmissionTintThickness, MaterialSrg::m_transmissionParams, clearCoatFactor, clearCoatRoughness, clearCoatNormal, alpha, o_opacity_mode); + // Apply Direct Lighting + ApplyDirectLighting(surface, lightingData); + + // Apply Image Based Lighting (IBL) + ApplyIBL(surface, lightingData); + + // Finalize Lighting + lightingData.FinalizeLighting(surface.transmission.tint); + + if (o_opacity_mode == OpacityMode::Blended || o_opacity_mode == OpacityMode::TintedTransparent) + { + alpha = FresnelSchlickWithRoughness(lightingData.NdotV, alpha, surface.roughnessLinear).x; // Increase opacity at grazing angles. + } + + PbrLightingOutput lightingOutput = GetPbrLightingOutput(surface, lightingData, alpha); // ------- Opacity ------- diff --git a/Gems/Atom/Feature/Common/Assets/Materials/Types/EnhancedPBR_Shadowmap_WithPS.azsl b/Gems/Atom/Feature/Common/Assets/Materials/Types/EnhancedPBR_Shadowmap_WithPS.azsl index e051a238bd..8a848f0bcc 100644 --- a/Gems/Atom/Feature/Common/Assets/Materials/Types/EnhancedPBR_Shadowmap_WithPS.azsl +++ b/Gems/Atom/Feature/Common/Assets/Materials/Types/EnhancedPBR_Shadowmap_WithPS.azsl @@ -11,7 +11,6 @@ */ #include -#include #include "EnhancedPBR_Common.azsli" #include #include diff --git a/Gems/Atom/Feature/Common/Assets/Materials/Types/Skin.azsl b/Gems/Atom/Feature/Common/Assets/Materials/Types/Skin.azsl index dc79a94007..bd0bdcd081 100644 --- a/Gems/Atom/Feature/Common/Assets/Materials/Types/Skin.azsl +++ b/Gems/Atom/Feature/Common/Assets/Materials/Types/Skin.azsl @@ -13,6 +13,7 @@ #include #include "Skin_Common.azsli" #include +#include #include #include diff --git a/Gems/Atom/Feature/Common/Assets/Materials/Types/StandardMultilayerPBR_ForwardPass.azsl b/Gems/Atom/Feature/Common/Assets/Materials/Types/StandardMultilayerPBR_ForwardPass.azsl index 9e5c29ba34..30e7df8646 100644 --- a/Gems/Atom/Feature/Common/Assets/Materials/Types/StandardMultilayerPBR_ForwardPass.azsl +++ b/Gems/Atom/Feature/Common/Assets/Materials/Types/StandardMultilayerPBR_ForwardPass.azsl @@ -10,10 +10,23 @@ * */ +// SRGs #include #include +#include + +// Pass Output #include + +// Utility #include +#include + +// Custom Surface & Lighting +#include + +// Decals +#include // ---------- Material Parameters ---------- @@ -47,6 +60,9 @@ DEFINE_LAYER_OPTIONS(o_layer3_) #include "MaterialInputs/TransmissionInput.azsli" #include "StandardMultilayerPBR_Common.azsli" + +// ---------- Vertex Shader ---------- + struct VSInput { // Base fields (required by the template azsli file)... @@ -83,7 +99,6 @@ struct VSOutput float3 m_blendMask : UV7; }; -#include #include #include @@ -115,6 +130,9 @@ VSOutput ForwardPassVS(VSInput IN) return OUT; } + +// ---------- Pixel Shader ---------- + PbrLightingOutput ForwardPassPS_Common(VSOutput IN, bool isFrontFace, out float depth) { depth = IN.m_position.z; diff --git a/Gems/Atom/Feature/Common/Assets/Materials/Types/StandardPBR_Common.azsli b/Gems/Atom/Feature/Common/Assets/Materials/Types/StandardPBR_Common.azsli index 70137a88c1..1a7e039da3 100644 --- a/Gems/Atom/Feature/Common/Assets/Materials/Types/StandardPBR_Common.azsli +++ b/Gems/Atom/Feature/Common/Assets/Materials/Types/StandardPBR_Common.azsli @@ -13,6 +13,7 @@ #pragma once #include +#include #include #include "MaterialInputs/BaseColorInput.azsli" diff --git a/Gems/Atom/Feature/Common/Assets/Materials/Types/StandardPBR_DepthPass_WithPS.azsl b/Gems/Atom/Feature/Common/Assets/Materials/Types/StandardPBR_DepthPass_WithPS.azsl index 2e64f5102a..4d4f7b195a 100644 --- a/Gems/Atom/Feature/Common/Assets/Materials/Types/StandardPBR_DepthPass_WithPS.azsl +++ b/Gems/Atom/Feature/Common/Assets/Materials/Types/StandardPBR_DepthPass_WithPS.azsl @@ -10,7 +10,6 @@ * */ -#include #include #include "./StandardPBR_Common.azsli" #include diff --git a/Gems/Atom/Feature/Common/Assets/Materials/Types/StandardPBR_ForwardPass.azsl b/Gems/Atom/Feature/Common/Assets/Materials/Types/StandardPBR_ForwardPass.azsl index 999db3c5da..e4ec2c0f4e 100644 --- a/Gems/Atom/Feature/Common/Assets/Materials/Types/StandardPBR_ForwardPass.azsl +++ b/Gems/Atom/Feature/Common/Assets/Materials/Types/StandardPBR_ForwardPass.azsl @@ -10,11 +10,25 @@ * */ -#include #include "StandardPBR_Common.azsli" + +// SRGs #include +#include + +// Pass Output #include + +// Utility #include +#include + +// Custom Surface & Lighting +#include + +// Decals +#include + // ---------- Material Parameters ---------- @@ -38,6 +52,8 @@ COMMON_OPTIONS_PARALLAX() #include "MaterialInputs/TransmissionInput.azsli" +// ---------- Vertex Shader ---------- + struct VSInput { // Base fields (required by the template azsli file)... @@ -66,8 +82,6 @@ struct VSOutput float2 m_uv[UvSetCount] : UV1; }; -#include -#include #include VSOutput StandardPbr_ForwardPassVS(VSInput IN) @@ -85,6 +99,9 @@ VSOutput StandardPbr_ForwardPassVS(VSInput IN) return OUT; } + +// ---------- Pixel Shader ---------- + PbrLightingOutput ForwardPassPS_Common(VSOutput IN, bool isFrontFace, out float depth) { // ------- Tangents & Bitangets ------- @@ -112,7 +129,7 @@ PbrLightingOutput ForwardPassPS_Common(VSOutput IN, bool isFrontFace, out float { float3x3 uvMatrix = MaterialSrg::m_parallaxUvIndex == 0 ? MaterialSrg::m_uvMatrix : CreateIdentity3x3(); float3x3 uvMatrixInverse = MaterialSrg::m_parallaxUvIndex == 0 ? MaterialSrg::m_uvMatrixInverse : CreateIdentity3x3(); - GetParallaxInput(IN.m_normal, tangents[MaterialSrg::m_parallaxUvIndex], bitangents[MaterialSrg::m_parallaxUvIndex], MaterialSrg::m_depthFactor, + GetParallaxInput(IN.m_normal, tangents[MaterialSrg::m_parallaxUvIndex], bitangents[MaterialSrg::m_parallaxUvIndex], MaterialSrg::m_depthFactor, ObjectSrg::GetWorldMatrix(), uvMatrix, uvMatrixInverse, IN.m_uv[MaterialSrg::m_parallaxUvIndex], IN.m_worldPosition, depth); @@ -130,7 +147,6 @@ PbrLightingOutput ForwardPassPS_Common(VSOutput IN, bool isFrontFace, out float Surface surface; surface.position = IN.m_worldPosition.xyz; - // ------- Alpha & Clip ------- float2 baseColorUv = IN.m_uv[MaterialSrg::m_baseColorMapUvIndex]; @@ -250,9 +266,9 @@ PbrLightingOutput ForwardPassPS_Common(VSOutput IN, bool isFrontFace, out float lightingData.diffuseResponse *= 1.0 - (FresnelSchlickWithRoughness(lightingData.NdotV, float3(0.04, 0.04, 0.04), surface.clearCoat.roughness) * surface.clearCoat.factor); } - // Multiscatter compensation factor - lightingData.CalculateMultiscatterCompensation(surface.specularF0, o_specularF0_enableMultiScatterCompensation); + // ------- Multiscatter ------- + lightingData.CalculateMultiscatterCompensation(surface.specularF0, o_specularF0_enableMultiScatterCompensation); // ------- Lighting Calculation ------- diff --git a/Gems/Atom/Feature/Common/Assets/Materials/Types/StandardPBR_Shadowmap_WithPS.azsl b/Gems/Atom/Feature/Common/Assets/Materials/Types/StandardPBR_Shadowmap_WithPS.azsl index 520c4cc580..b506e0451b 100644 --- a/Gems/Atom/Feature/Common/Assets/Materials/Types/StandardPBR_Shadowmap_WithPS.azsl +++ b/Gems/Atom/Feature/Common/Assets/Materials/Types/StandardPBR_Shadowmap_WithPS.azsl @@ -11,7 +11,6 @@ */ #include -#include #include "StandardPBR_Common.azsli" #include #include diff --git a/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/BackLighting.azsli b/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/BackLighting.azsli index 2df17a41a9..62f77dd701 100644 --- a/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/BackLighting.azsli +++ b/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/BackLighting.azsli @@ -1,7 +1,23 @@ +/* +* All or portions of this file Copyright (c) Amazon.com, Inc. or its affiliates or +* its licensors. +* +* For complete copyright and license terms please see the LICENSE at the root of this +* distribution (the "License"). All use of this software is governed by the License, +* or, if provided, by the license below or the license accompanying this file. Do not +* remove or modify any license notices. This file is distributed on an "AS IS" BASIS, +* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +* +*/ + #pragma once +// ------------------------------------------------------------------------------ +// NOTE: The following must be included or defined before including this file: +// - Surface - LightingData +// --------------------------------------------------------------------------------- + #include -#include // Analytical integation (approximation) of diffusion profile over radius, could be replaced by other pre integrated kernels // such as sum of Gaussian diff --git a/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/Decals.azsli b/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/Decals.azsli index b452f08c22..d2eb978eb6 100644 --- a/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/Decals.azsli +++ b/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/Decals.azsli @@ -12,23 +12,27 @@ #pragma once +// ------------------------------------------------------------------------------ +// NOTE: The following must be included or defined before including this file: +// - Surface +// --------------------------------------------------------------------------------- + #include #include #include -#include void ApplyDecal(uint currDecalIndex, inout Surface surface); void ApplyDecals(inout LightCullingTileIterator tileIterator, inout Surface surface) { tileIterator.LoadAdvance(); - - while( !tileIterator.IsDone() ) - { - uint currDecalIndex = tileIterator.GetValue(); + + while( !tileIterator.IsDone() ) + { + uint currDecalIndex = tileIterator.GetValue(); tileIterator.LoadAdvance(); - ApplyDecal(currDecalIndex, surface); + ApplyDecal(currDecalIndex, surface); } } @@ -44,13 +48,13 @@ float GetDecalAttenuation(float3 surfNormal, float3 decalUp, float decalAngleAtt void ApplyDecal(uint currDecalIndex, inout Surface surface) { - ViewSrg::Decal decal = ViewSrg::m_decals[currDecalIndex]; + ViewSrg::Decal decal = ViewSrg::m_decals[currDecalIndex]; float3x3 decalRot = MatrixFromQuaternion(decal.m_quaternion); - float3 localPos = surface.position - decal.m_position; + float3 localPos = surface.position - decal.m_position; localPos = mul(localPos, decalRot); - + float3 decalUVW = localPos * rcp(decal.m_halfSize); if(decalUVW.x >= -1.0f && decalUVW.x <= 1.0f && decalUVW.y >= -1.0f && decalUVW.y <= 1.0f && @@ -70,25 +74,23 @@ void ApplyDecal(uint currDecalIndex, inout Surface surface) switch(textureArrayIndex) { case 0: - baseMap = ViewSrg::m_decalTextureArray0.Sample(PassSrg::LinearSampler, decalUV); + baseMap = ViewSrg::m_decalTextureArray0.Sample(PassSrg::LinearSampler, decalUV); break; case 1: - baseMap = ViewSrg::m_decalTextureArray1.Sample(PassSrg::LinearSampler, decalUV); + baseMap = ViewSrg::m_decalTextureArray1.Sample(PassSrg::LinearSampler, decalUV); break; case 2: - baseMap = ViewSrg::m_decalTextureArray2.Sample(PassSrg::LinearSampler, decalUV); + baseMap = ViewSrg::m_decalTextureArray2.Sample(PassSrg::LinearSampler, decalUV); break; case 3: - baseMap = ViewSrg::m_decalTextureArray3.Sample(PassSrg::LinearSampler, decalUV); + baseMap = ViewSrg::m_decalTextureArray3.Sample(PassSrg::LinearSampler, decalUV); break; case 4: - baseMap = ViewSrg::m_decalTextureArray4.Sample(PassSrg::LinearSampler, decalUV); + baseMap = ViewSrg::m_decalTextureArray4.Sample(PassSrg::LinearSampler, decalUV); break; } - float opacity = baseMap.a * decal.m_opacity * GetDecalAttenuation(surface.normal, decalRot[2], decal.m_angleAttenuation); - surface.albedo = lerp(surface.albedo, baseMap.rgb, opacity); - } + float opacity = baseMap.a * decal.m_opacity * GetDecalAttenuation(surface.normal, decalRot[2], decal.m_angleAttenuation); + surface.albedo = lerp(surface.albedo, baseMap.rgb, opacity); + } } - - diff --git a/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/Lighting/EnhancedLighting.azsli b/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/Lighting/EnhancedLighting.azsli new file mode 100644 index 0000000000..8de8e0c33f --- /dev/null +++ b/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/Lighting/EnhancedLighting.azsli @@ -0,0 +1,119 @@ +/* +* All or portions of this file Copyright (c) Amazon.com, Inc. or its affiliates or +* its licensors. +* +* For complete copyright and license terms please see the LICENSE at the root of this +* distribution (the "License"). All use of this software is governed by the License, +* or, if provided, by the license below or the license accompanying this file. Do not +* remove or modify any license notices. This file is distributed on an "AS IS" BASIS, +* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +* +*/ + +#pragma once + +// Include options first +#include + +// Then include custom surface and lighting data types +#include +#include + +#include +#include + +// Then define the Diffuse and Specular lighting functions +float3 GetDiffuseLighting(Surface surface, LightingData lightingData, float3 lightIntensity, float3 dirToLight) +{ + float3 diffuse; + if(o_enableSubsurfaceScattering) + { + // Use diffuse brdf contains double Fresnel (enter/exit surface) terms if subsurface scattering is enabled + diffuse = NormalizedDisneyDiffuse(surface.albedo, surface.normal, lightingData.dirToCamera, dirToLight, surface.roughnessLinear); + } + else + { + diffuse = DiffuseLambertian(surface.albedo, surface.normal, dirToLight); + } + + if(o_clearCoat_feature_enabled) + { + // Attenuate diffuse term by clear coat's fresnel term to account for energy loss + float HdotV = saturate(dot(normalize(dirToLight + lightingData.dirToCamera), lightingData.dirToCamera)); + diffuse *= 1.0 - (FresnelSchlick(HdotV, 0.04) * surface.clearCoat.factor); + } + + diffuse *= lightIntensity; + return diffuse; +} + +float3 GetSpecularLighting(Surface surface, LightingData lightingData, const float3 lightIntensity, const float3 dirToLight) +{ + float3 specular; + if (o_enableAnisotropy) + { + specular = AnisotropicGGX( lightingData.dirToCamera, dirToLight, surface.normal, surface.anisotropy.tangent, surface.anisotropy.bitangent, surface.anisotropy.anisotropyFactors, + surface.specularF0, lightingData.NdotV, lightingData.multiScatterCompensation ); + } + else + { + specular = SpecularGGX(lightingData.dirToCamera, dirToLight, surface.normal, surface.specularF0, lightingData.NdotV, surface.roughnessA2, lightingData.multiScatterCompensation); + } + + if(o_clearCoat_feature_enabled) + { + float3 halfVector = normalize(dirToLight + lightingData.dirToCamera); + float NdotH = saturate(dot(surface.clearCoat.normal, halfVector)); + float NdotL = saturate(dot(surface.clearCoat.normal, dirToLight)); + float HdotL = saturate(dot(halfVector, dirToLight)); + + // HdotV = HdotL due to the definition of half vector + float3 clearCoatF = FresnelSchlick(HdotL, 0.04) * surface.clearCoat.factor; + float clearCoatRoughness = max(surface.clearCoat.roughness * surface.clearCoat.roughness, 0.0005f); + float3 clearCoatSpecular = ClearCoatGGX(NdotH, HdotL, NdotL, surface.clearCoat.normal, clearCoatRoughness, clearCoatF ); + + specular = specular * (1.0 - clearCoatF) * (1.0 - clearCoatF) + clearCoatSpecular; + } + + specular *= lightIntensity; + + return specular; +} + + +// Then include everything else +#include +#include + + +struct PbrLightingOutput +{ + float4 m_diffuseColor; + float4 m_specularColor; + float4 m_albedo; + float4 m_specularF0; + float4 m_normal; + float4 m_clearCoatNormal; + float3 m_scatterDistance; +}; + + +PbrLightingOutput GetPbrLightingOutput(Surface surface, LightingData lightingData, float alpha) +{ + PbrLightingOutput lightingOutput; + + lightingOutput.m_diffuseColor = float4(lightingData.diffuseLighting, alpha); + lightingOutput.m_specularColor = float4(lightingData.specularLighting, 1.0); + + // albedo, specularF0, roughness, and normals for later passes (specular IBL, Diffuse GI, SSR, AO, etc) + lightingOutput.m_specularF0 = float4(surface.specularF0, surface.roughnessLinear); + lightingOutput.m_albedo.rgb = surface.albedo * lightingData.diffuseResponse; + lightingOutput.m_albedo.a = lightingData.occlusion; + lightingOutput.m_normal.rgb = EncodeNormalSignedOctahedron(surface.normal); + lightingOutput.m_normal.a = o_specularF0_enableMultiScatterCompensation ? 1.0f : 0.0f; + + // layout: (packedNormal.x, packedNormal.y, strength factor, clear coat roughness (not base material's roughness)) + lightingOutput.m_clearCoatNormal = float4(EncodeNormalSphereMap(surface.clearCoat.normal), o_clearCoat_feature_enabled ? surface.clearCoat.factor : 0.0, surface.clearCoat.roughness); + + return lightingOutput; +} diff --git a/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/Lighting/SkinLighting.azsli b/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/Lighting/SkinLighting.azsli new file mode 100644 index 0000000000..8de8e0c33f --- /dev/null +++ b/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/Lighting/SkinLighting.azsli @@ -0,0 +1,119 @@ +/* +* All or portions of this file Copyright (c) Amazon.com, Inc. or its affiliates or +* its licensors. +* +* For complete copyright and license terms please see the LICENSE at the root of this +* distribution (the "License"). All use of this software is governed by the License, +* or, if provided, by the license below or the license accompanying this file. Do not +* remove or modify any license notices. This file is distributed on an "AS IS" BASIS, +* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +* +*/ + +#pragma once + +// Include options first +#include + +// Then include custom surface and lighting data types +#include +#include + +#include +#include + +// Then define the Diffuse and Specular lighting functions +float3 GetDiffuseLighting(Surface surface, LightingData lightingData, float3 lightIntensity, float3 dirToLight) +{ + float3 diffuse; + if(o_enableSubsurfaceScattering) + { + // Use diffuse brdf contains double Fresnel (enter/exit surface) terms if subsurface scattering is enabled + diffuse = NormalizedDisneyDiffuse(surface.albedo, surface.normal, lightingData.dirToCamera, dirToLight, surface.roughnessLinear); + } + else + { + diffuse = DiffuseLambertian(surface.albedo, surface.normal, dirToLight); + } + + if(o_clearCoat_feature_enabled) + { + // Attenuate diffuse term by clear coat's fresnel term to account for energy loss + float HdotV = saturate(dot(normalize(dirToLight + lightingData.dirToCamera), lightingData.dirToCamera)); + diffuse *= 1.0 - (FresnelSchlick(HdotV, 0.04) * surface.clearCoat.factor); + } + + diffuse *= lightIntensity; + return diffuse; +} + +float3 GetSpecularLighting(Surface surface, LightingData lightingData, const float3 lightIntensity, const float3 dirToLight) +{ + float3 specular; + if (o_enableAnisotropy) + { + specular = AnisotropicGGX( lightingData.dirToCamera, dirToLight, surface.normal, surface.anisotropy.tangent, surface.anisotropy.bitangent, surface.anisotropy.anisotropyFactors, + surface.specularF0, lightingData.NdotV, lightingData.multiScatterCompensation ); + } + else + { + specular = SpecularGGX(lightingData.dirToCamera, dirToLight, surface.normal, surface.specularF0, lightingData.NdotV, surface.roughnessA2, lightingData.multiScatterCompensation); + } + + if(o_clearCoat_feature_enabled) + { + float3 halfVector = normalize(dirToLight + lightingData.dirToCamera); + float NdotH = saturate(dot(surface.clearCoat.normal, halfVector)); + float NdotL = saturate(dot(surface.clearCoat.normal, dirToLight)); + float HdotL = saturate(dot(halfVector, dirToLight)); + + // HdotV = HdotL due to the definition of half vector + float3 clearCoatF = FresnelSchlick(HdotL, 0.04) * surface.clearCoat.factor; + float clearCoatRoughness = max(surface.clearCoat.roughness * surface.clearCoat.roughness, 0.0005f); + float3 clearCoatSpecular = ClearCoatGGX(NdotH, HdotL, NdotL, surface.clearCoat.normal, clearCoatRoughness, clearCoatF ); + + specular = specular * (1.0 - clearCoatF) * (1.0 - clearCoatF) + clearCoatSpecular; + } + + specular *= lightIntensity; + + return specular; +} + + +// Then include everything else +#include +#include + + +struct PbrLightingOutput +{ + float4 m_diffuseColor; + float4 m_specularColor; + float4 m_albedo; + float4 m_specularF0; + float4 m_normal; + float4 m_clearCoatNormal; + float3 m_scatterDistance; +}; + + +PbrLightingOutput GetPbrLightingOutput(Surface surface, LightingData lightingData, float alpha) +{ + PbrLightingOutput lightingOutput; + + lightingOutput.m_diffuseColor = float4(lightingData.diffuseLighting, alpha); + lightingOutput.m_specularColor = float4(lightingData.specularLighting, 1.0); + + // albedo, specularF0, roughness, and normals for later passes (specular IBL, Diffuse GI, SSR, AO, etc) + lightingOutput.m_specularF0 = float4(surface.specularF0, surface.roughnessLinear); + lightingOutput.m_albedo.rgb = surface.albedo * lightingData.diffuseResponse; + lightingOutput.m_albedo.a = lightingData.occlusion; + lightingOutput.m_normal.rgb = EncodeNormalSignedOctahedron(surface.normal); + lightingOutput.m_normal.a = o_specularF0_enableMultiScatterCompensation ? 1.0f : 0.0f; + + // layout: (packedNormal.x, packedNormal.y, strength factor, clear coat roughness (not base material's roughness)) + lightingOutput.m_clearCoatNormal = float4(EncodeNormalSphereMap(surface.clearCoat.normal), o_clearCoat_feature_enabled ? surface.clearCoat.factor : 0.0, surface.clearCoat.roughness); + + return lightingOutput; +} diff --git a/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/Lighting/StandardLighting.azsli b/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/Lighting/StandardLighting.azsli index 31fbbd2138..8de8e0c33f 100644 --- a/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/Lighting/StandardLighting.azsli +++ b/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/Lighting/StandardLighting.azsli @@ -19,6 +19,68 @@ #include #include +#include +#include + +// Then define the Diffuse and Specular lighting functions +float3 GetDiffuseLighting(Surface surface, LightingData lightingData, float3 lightIntensity, float3 dirToLight) +{ + float3 diffuse; + if(o_enableSubsurfaceScattering) + { + // Use diffuse brdf contains double Fresnel (enter/exit surface) terms if subsurface scattering is enabled + diffuse = NormalizedDisneyDiffuse(surface.albedo, surface.normal, lightingData.dirToCamera, dirToLight, surface.roughnessLinear); + } + else + { + diffuse = DiffuseLambertian(surface.albedo, surface.normal, dirToLight); + } + + if(o_clearCoat_feature_enabled) + { + // Attenuate diffuse term by clear coat's fresnel term to account for energy loss + float HdotV = saturate(dot(normalize(dirToLight + lightingData.dirToCamera), lightingData.dirToCamera)); + diffuse *= 1.0 - (FresnelSchlick(HdotV, 0.04) * surface.clearCoat.factor); + } + + diffuse *= lightIntensity; + return diffuse; +} + +float3 GetSpecularLighting(Surface surface, LightingData lightingData, const float3 lightIntensity, const float3 dirToLight) +{ + float3 specular; + if (o_enableAnisotropy) + { + specular = AnisotropicGGX( lightingData.dirToCamera, dirToLight, surface.normal, surface.anisotropy.tangent, surface.anisotropy.bitangent, surface.anisotropy.anisotropyFactors, + surface.specularF0, lightingData.NdotV, lightingData.multiScatterCompensation ); + } + else + { + specular = SpecularGGX(lightingData.dirToCamera, dirToLight, surface.normal, surface.specularF0, lightingData.NdotV, surface.roughnessA2, lightingData.multiScatterCompensation); + } + + if(o_clearCoat_feature_enabled) + { + float3 halfVector = normalize(dirToLight + lightingData.dirToCamera); + float NdotH = saturate(dot(surface.clearCoat.normal, halfVector)); + float NdotL = saturate(dot(surface.clearCoat.normal, dirToLight)); + float HdotL = saturate(dot(halfVector, dirToLight)); + + // HdotV = HdotL due to the definition of half vector + float3 clearCoatF = FresnelSchlick(HdotL, 0.04) * surface.clearCoat.factor; + float clearCoatRoughness = max(surface.clearCoat.roughness * surface.clearCoat.roughness, 0.0005f); + float3 clearCoatSpecular = ClearCoatGGX(NdotH, HdotL, NdotL, surface.clearCoat.normal, clearCoatRoughness, clearCoatF ); + + specular = specular * (1.0 - clearCoatF) * (1.0 - clearCoatF) + clearCoatSpecular; + } + + specular *= lightIntensity; + + return specular; +} + + // Then include everything else #include #include @@ -55,9 +117,3 @@ PbrLightingOutput GetPbrLightingOutput(Surface surface, LightingData lightingDat return lightingOutput; } - - - - - - diff --git a/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/LightingModel.azsli b/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/LightingModel.azsli index 581ca2f172..64f85b43f0 100644 --- a/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/LightingModel.azsli +++ b/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/LightingModel.azsli @@ -28,30 +28,6 @@ #include #include -// VSInput, VSOutput, ObjectSrg must be defined before including this file. - -// DEPRECATED: Please use the VertexHelper(...) function in VertexHelper.azsli instead. -//! @param skipShadowCoords can be useful for example when PixelDepthOffset is enable, because the pixel shader will have to run before the final world position is known -void PbrVsHelper(in VSInput IN, inout VSOutput OUT, float3 worldPosition, bool skipShadowCoords = false) -{ - OUT.m_worldPosition = worldPosition; - OUT.m_position = mul(ViewSrg::m_viewProjectionMatrix, float4(OUT.m_worldPosition, 1.0)); - - float4x4 objectToWorld = ObjectSrg::GetWorldMatrix(); - float3x3 objectToWorldIT = ObjectSrg::GetWorldMatrixInverseTranspose(); - - ConstructTBN(IN.m_normal, IN.m_tangent, IN.m_bitangent, objectToWorld, objectToWorldIT, OUT.m_normal, OUT.m_tangent, OUT.m_bitangent); - - // directional light shadow - const uint shadowIndex = ViewSrg::m_shadowIndexDirectionalLight; - if (o_enableShadows && !skipShadowCoords && shadowIndex < SceneSrg::m_directionalLightCount) - { - DirectionalLightShadow::GetShadowCoords( - shadowIndex, - worldPosition, - OUT.m_shadowCoords); - } -} // DEPRECATED: Please use the functions in StandardLighting.azsli instead. diff --git a/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/Lights/LightTypesCommon.azsli b/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/Lights/LightTypesCommon.azsli index a668691b75..ac28000148 100644 --- a/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/Lights/LightTypesCommon.azsli +++ b/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/Lights/LightTypesCommon.azsli @@ -16,71 +16,9 @@ #include #include -#include -#include -#include option bool o_area_light_validation = false; -float3 GetDiffuseLighting(Surface surface, LightingData lightingData, float3 lightIntensity, float3 dirToLight) -{ - float3 diffuse; - if(o_enableSubsurfaceScattering) - { - // Use diffuse brdf contains double Fresnel (enter/exit surface) terms if subsurface scattering is enabled - diffuse = NormalizedDisneyDiffuse(surface.albedo, surface.normal, lightingData.dirToCamera, dirToLight, surface.roughnessLinear); - } - else - { - diffuse = DiffuseLambertian(surface.albedo, surface.normal, dirToLight); - } - - if(o_clearCoat_feature_enabled) - { - // Attenuate diffuse term by clear coat's fresnel term to account for energy loss - float HdotV = saturate(dot(normalize(dirToLight + lightingData.dirToCamera), lightingData.dirToCamera)); - diffuse *= 1.0 - (FresnelSchlick(HdotV, 0.04) * surface.clearCoat.factor); - } - - diffuse *= lightIntensity; - return diffuse; -} - -float3 GetSpecularLighting(Surface surface, LightingData lightingData, const float3 lightIntensity, const float3 dirToLight) -{ - float3 specular; - if (o_enableAnisotropy) - { - //AnisotropicGGX( float3 dirToCamera, float3 dirToLight, float3 normal, float3 tangent, float3 bitangent, float2 anisotropyFactors, - // float3 specularF0, float NdotV, float multiScatterCompensation ) - - specular = AnisotropicGGX( lightingData.dirToCamera, dirToLight, surface.normal, surface.anisotropy.tangent, surface.anisotropy.bitangent, surface.anisotropy.anisotropyFactors, - surface.specularF0, lightingData.NdotV, lightingData.multiScatterCompensation ); - } - else - { - specular = SpecularGGX(lightingData.dirToCamera, dirToLight, surface.normal, surface.specularF0, lightingData.NdotV, surface.roughnessA2, lightingData.multiScatterCompensation); - } - - if(o_clearCoat_feature_enabled) - { - float3 halfVector = normalize(dirToLight + lightingData.dirToCamera); - float NdotH = saturate(dot(surface.clearCoat.normal, halfVector)); - float NdotL = saturate(dot(surface.clearCoat.normal, dirToLight)); - float HdotL = saturate(dot(halfVector, dirToLight)); - - // HdotV = HdotL due to the definition of half vector - float3 clearCoatF = FresnelSchlick(HdotL, 0.04) * surface.clearCoat.factor; - float clearCoatRoughness = max(surface.clearCoat.roughness * surface.clearCoat.roughness, 0.0005f); - float3 clearCoatSpecular = ClearCoatGGX(NdotH, HdotL, NdotL, surface.clearCoat.normal, clearCoatRoughness, clearCoatF ); - - specular = specular * (1.0 - clearCoatF) * (1.0 - clearCoatF) + clearCoatSpecular; - } - - specular *= lightIntensity; - - return specular; -} //! Adjust the intensity of specular light based on the radius of the light source and roughness of the surface to approximate energy conservation. float GetIntensityAdjustedByRadiusAndRoughness(float roughnessA, float radius, float distance2) diff --git a/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/Microfacet/Brdf.azsli b/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/Microfacet/Brdf.azsli index fa60e9485d..0f6c16f619 100644 --- a/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/Microfacet/Brdf.azsli +++ b/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/Microfacet/Brdf.azsli @@ -18,7 +18,6 @@ * rather than transmit. **/ -#include #include #include "Ggx.azsli" #include "Fresnel.azsli" @@ -81,9 +80,6 @@ float3 DiffuseTitanfall(float roughnessA, float3 albedo, float3 normal, float3 d } - - - // ------- Specular Lighting ------- //! Computes specular response from surfaces with microgeometry. The common form for microfacet diff --git a/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/Surface.azsli b/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/Surface.azsli deleted file mode 100644 index 104eaf140e..0000000000 --- a/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/Surface.azsli +++ /dev/null @@ -1,68 +0,0 @@ -/* -* All or portions of this file Copyright (c) Amazon.com, Inc. or its affiliates or -* its licensors. -* -* For complete copyright and license terms please see the LICENSE at the root of this -* distribution (the "License"). All use of this software is governed by the License, -* or, if provided, by the license below or the license accompanying this file. Do not -* remove or modify any license notices. This file is distributed on an "AS IS" BASIS, -* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -* -*/ - -#pragma once - -// //! The surface struct should contain all the info for a pixel that can be -// //! passed onto the rendering logic for shading. -// //! Note that metallic workflow can be supported by first converting to these physical properties first. -// struct Surface -// { -// float3 position; -// float3 normal; -// float3 tangentAniso; //! surface space tangent for anisotropic use -// float3 bitangentAniso; //! surface space bitangent for anisotropic use -// float2 anisotropyFactors; //! anisotory factors along the tangent and the bitangent directions -// float3 albedo; -// float3 specularF0; //!< actual fresnel f0 spectral value of the surface (as opposed to a "factor") -// float3 multiScatterCompensation; //!< the constant scaling term to approximate multiscattering contribution in specular BRDF -// float roughnessLinear; //!< perceptually linear roughness value authored by artists. Must be remapped to roughnessA before use -// float roughnessA; //!< actual roughness value ( a.k.a. "alpha roughness") to be used in microfacet calculations -// float thickness; //!< pre baked local thickness, used for transmission -// float4 transmissionParams; //!< parameters: thick mode->(attenuation coefficient, power, distortion, scale), thin mode: (float3 scatter distance, scale) -// float clearCoatFactor; //!< clear coat strength factor -// float clearCoatRoughness; //!< clear coat linear roughness (not base layer one) -// float3 clearCoatNormal; //!< normal used for top layer clear coat -// }; -// -// //! Calculate and fill the data required for fast directional anisotropty surface response. -// //! Assumption: the normal and roughnessA surface properties were filled and are valid -// //! Notice that since the newly created surface tangent and bitangent will be rotated -// //! according to the anisotropy direction and should not be used for other purposes uness -// //! rotated back. -// void CalculateSurfaceDirectionalAnisotropicData( -// inout Surface surface, float2 anisotropyAngleAndFactor, -// float3 vtxTangent, float3 vtxBitangent ) -// { -// const float anisotropyAngle = anisotropyAngleAndFactor.x; -// const float anisotropyFactor = anisotropyAngleAndFactor.y; -// -// surface.anisotropyFactors = max( 0.01, -// float2( surface.roughnessA * (1.0 + anisotropyFactor), -// surface.roughnessA * (1.0 - anisotropyFactor) ) -// ); -// -// if (anisotropyAngle > 0.01) -// { -// // Base rotation according to anisotropic main direction -// float aniSin, aniCos; -// sincos(anisotropyAngle, aniSin, aniCos); -// -// // Rotate the vertex tangent to get new aligned to surface normal tangent -// vtxTangent = aniCos * vtxTangent - aniSin * vtxBitangent; -// } -// -// // Now create the new surface base according to the surface normal -// // If rotation was required it was already applied to the tangent, hence to the bitangent -// surface.bitangentAniso = normalize(cross(surface.normal, vtxTangent)); -// surface.tangentAniso = cross(surface.bitangentAniso, surface.normal); -// } diff --git a/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/Surfaces/BasePbrSurfaceData.azsli b/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/Surfaces/BasePbrSurfaceData.azsli index da4c44e1d8..d17f89707d 100644 --- a/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/Surfaces/BasePbrSurfaceData.azsli +++ b/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/Surfaces/BasePbrSurfaceData.azsli @@ -63,6 +63,9 @@ void BasePbrSurfaceData::ApplySpecularAA() float kernelRoughnessA2 = min(2.0 * variance , varianceThresh ); float filteredRoughnessA2 = saturate ( roughnessA2 + kernelRoughnessA2 ); roughnessA2 = filteredRoughnessA2; + + roughnessA = sqrt(roughnessA2); + roughnessLinear = sqrt(roughnessA); } void BasePbrSurfaceData::CalculateRoughnessA() diff --git a/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/Surfaces/EnhancedSurface.azsli b/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/Surfaces/EnhancedSurface.azsli new file mode 100644 index 0000000000..9d4163c474 --- /dev/null +++ b/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/Surfaces/EnhancedSurface.azsli @@ -0,0 +1,91 @@ +/* +* All or portions of this file Copyright (c) Amazon.com, Inc. or its affiliates or +* its licensors. +* +* For complete copyright and license terms please see the LICENSE at the root of this +* distribution (the "License"). All use of this software is governed by the License, +* or, if provided, by the license below or the license accompanying this file. Do not +* remove or modify any license notices. This file is distributed on an "AS IS" BASIS, +* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +* +*/ + +#pragma once + +#include +#include +#include +#include + +class Surface //: BasePbrSurfaceData +{ + //BasePbrSurfaceData pbr; + AnisotropicSurfaceData anisotropy; + ClearCoatSurfaceData clearCoat; + TransmissionSurfaceData transmission; + + // ------- BasePbrSurfaceData ------- + + float3 position; //!< Position in world-space + float3 normal; //!< Normal in world-space + float3 albedo; //!< Albedo color of the non-metallic material, will be multiplied against the diffuse lighting value + float3 specularF0; //!< Fresnel f0 spectral value of the surface + float roughnessLinear; //!< Perceptually linear roughness value authored by artists. Must be remapped to roughnessA before use + float roughnessA; //!< Actual roughness value ( a.k.a. "alpha roughness") to be used in microfacet calculations + float roughnessA2; //!< Alpha roughness ^ 2 (i.e. roughnessA * roughnessA), used in GGX, cached here for perfromance + + //! Applies specular anti-aliasing to roughnessA2 + void ApplySpecularAA(); + + //! Calculates roughnessA and roughnessA2 after roughness has been set + void CalculateRoughnessA(); + + //! Sets albedo and specularF0 using metallic workflow + void SetAlbedoAndSpecularF0(float3 baseColor, float inSpecularF0, float metallic); + +}; + + +// Specular Anti-Aliasing technique from this paper: +// http://www.jp.square-enix.com/tech/library/pdf/ImprovedGeometricSpecularAA.pdf +void Surface::ApplySpecularAA() +{ + // Constants for formula below + const float screenVariance = 0.25f; + const float varianceThresh = 0.18f; + + // Specular Anti-Aliasing + float3 dndu = ddx_fine( normal ); + float3 dndv = ddy_fine( normal ); + float variance = screenVariance * (dot( dndu , dndu ) + dot( dndv , dndv )); + float kernelRoughnessA2 = min(2.0 * variance , varianceThresh ); + float filteredRoughnessA2 = saturate ( roughnessA2 + kernelRoughnessA2 ); + roughnessA2 = filteredRoughnessA2; +} + +void Surface::CalculateRoughnessA() +{ + // The roughness value in microfacet calculations (called "alpha" in the literature) does not give perceptually + // linear results. Disney found that squaring the roughness value before using it in microfacet equations causes + // the user-provided roughness parameter to be more perceptually linear. We keep both values available as some + // equations need roughnessLinear (i.e. IBL sampling) while others need roughnessA (i.e. GGX equations). + // See Burley's Disney PBR: https://pdfs.semanticscholar.org/eeee/3b125c09044d3e2f58ed0e4b1b66a677886d.pdf + + roughnessA = max(roughnessLinear * roughnessLinear, MinRoughnessA); + + roughnessA2 = roughnessA * roughnessA; + if(o_applySpecularAA) + { + ApplySpecularAA(); + } +} + +void Surface::SetAlbedoAndSpecularF0(float3 baseColor, float inSpecularF0, float metallic) +{ + float3 dielectricSpecularF0 = MaxDielectricSpecularF0 * inSpecularF0; + + // Compute albedo and specularF0 based on metalness + albedo = lerp(baseColor, float3(0.0f, 0.0f, 0.0f), metallic); + specularF0 = lerp(dielectricSpecularF0, baseColor, metallic); +} + diff --git a/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/Surfaces/SkinSurface.azsli b/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/Surfaces/SkinSurface.azsli new file mode 100644 index 0000000000..9d4163c474 --- /dev/null +++ b/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/Surfaces/SkinSurface.azsli @@ -0,0 +1,91 @@ +/* +* All or portions of this file Copyright (c) Amazon.com, Inc. or its affiliates or +* its licensors. +* +* For complete copyright and license terms please see the LICENSE at the root of this +* distribution (the "License"). All use of this software is governed by the License, +* or, if provided, by the license below or the license accompanying this file. Do not +* remove or modify any license notices. This file is distributed on an "AS IS" BASIS, +* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +* +*/ + +#pragma once + +#include +#include +#include +#include + +class Surface //: BasePbrSurfaceData +{ + //BasePbrSurfaceData pbr; + AnisotropicSurfaceData anisotropy; + ClearCoatSurfaceData clearCoat; + TransmissionSurfaceData transmission; + + // ------- BasePbrSurfaceData ------- + + float3 position; //!< Position in world-space + float3 normal; //!< Normal in world-space + float3 albedo; //!< Albedo color of the non-metallic material, will be multiplied against the diffuse lighting value + float3 specularF0; //!< Fresnel f0 spectral value of the surface + float roughnessLinear; //!< Perceptually linear roughness value authored by artists. Must be remapped to roughnessA before use + float roughnessA; //!< Actual roughness value ( a.k.a. "alpha roughness") to be used in microfacet calculations + float roughnessA2; //!< Alpha roughness ^ 2 (i.e. roughnessA * roughnessA), used in GGX, cached here for perfromance + + //! Applies specular anti-aliasing to roughnessA2 + void ApplySpecularAA(); + + //! Calculates roughnessA and roughnessA2 after roughness has been set + void CalculateRoughnessA(); + + //! Sets albedo and specularF0 using metallic workflow + void SetAlbedoAndSpecularF0(float3 baseColor, float inSpecularF0, float metallic); + +}; + + +// Specular Anti-Aliasing technique from this paper: +// http://www.jp.square-enix.com/tech/library/pdf/ImprovedGeometricSpecularAA.pdf +void Surface::ApplySpecularAA() +{ + // Constants for formula below + const float screenVariance = 0.25f; + const float varianceThresh = 0.18f; + + // Specular Anti-Aliasing + float3 dndu = ddx_fine( normal ); + float3 dndv = ddy_fine( normal ); + float variance = screenVariance * (dot( dndu , dndu ) + dot( dndv , dndv )); + float kernelRoughnessA2 = min(2.0 * variance , varianceThresh ); + float filteredRoughnessA2 = saturate ( roughnessA2 + kernelRoughnessA2 ); + roughnessA2 = filteredRoughnessA2; +} + +void Surface::CalculateRoughnessA() +{ + // The roughness value in microfacet calculations (called "alpha" in the literature) does not give perceptually + // linear results. Disney found that squaring the roughness value before using it in microfacet equations causes + // the user-provided roughness parameter to be more perceptually linear. We keep both values available as some + // equations need roughnessLinear (i.e. IBL sampling) while others need roughnessA (i.e. GGX equations). + // See Burley's Disney PBR: https://pdfs.semanticscholar.org/eeee/3b125c09044d3e2f58ed0e4b1b66a677886d.pdf + + roughnessA = max(roughnessLinear * roughnessLinear, MinRoughnessA); + + roughnessA2 = roughnessA * roughnessA; + if(o_applySpecularAA) + { + ApplySpecularAA(); + } +} + +void Surface::SetAlbedoAndSpecularF0(float3 baseColor, float inSpecularF0, float metallic) +{ + float3 dielectricSpecularF0 = MaxDielectricSpecularF0 * inSpecularF0; + + // Compute albedo and specularF0 based on metalness + albedo = lerp(baseColor, float3(0.0f, 0.0f, 0.0f), metallic); + specularF0 = lerp(dielectricSpecularF0, baseColor, metallic); +} + diff --git a/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/Vertex/VertexHelper.azsli b/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/Vertex/VertexHelper.azsli index 24cca8dc87..eaac9d82df 100644 --- a/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/Vertex/VertexHelper.azsli +++ b/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/Vertex/VertexHelper.azsli @@ -13,7 +13,9 @@ #pragma once // ------------------------------------------------------------------------------ -// NOTE: VSInput, VSOutput, ObjectSrg must be defined before including this file. +// NOTE: The following must be included or defined before including this file: +// - VSInput - ObjectSrg +// - VSOutput - PassSrg // --------------------------------------------------------------------------------- // Options @@ -23,8 +25,6 @@ #include #include #include -#include -#include // Math #include @@ -33,7 +33,6 @@ // Shadow Coords #include - //! @param skipShadowCoords can be useful for example when PixelDepthOffset is enable, because the pixel shader will have to run before the final world position is known void VertexHelper(in VSInput IN, inout VSOutput OUT, float3 worldPosition, bool skipShadowCoords = false) {