Adi Bar-Lev
64bbc700fa
- This rendering technique reduces the memory required per pipeline by 750MB compared to the PPLL technique!! - Using 3 screen buffers representing the closest 3 hair gragments depths. - Going through second geometry pass that disqualify any fragment further than the third depth, the technique blends the three closes shaders hair fragments. - Supports the Marschner lighting model (big change from the original TressFX 4.1 implementation) - The current technique is almost twice the performance of the PPLL but not quite as advacned when come to final visual quality. Remarks: Unlike the PPLL, this technique is still lacking some of the advanced features added to the PPLL such as 1. Back lobe (TT) conseal by depth comparison 2. Thickness dependency in light transfer (mainly TT) 3. Allowing TT transfer for thin separated hair strands (might be supported by default with no distinction) Signed-off-by: Adi-Amazon <Adi Bar-Lev 82479970+Adi-Amazon@users.noreply.github.com> Signed-off-by: Adi-Amazon <Adi Bar-Lev barlev@amazon.com> Signed-off-by: Adi-Amazon <Adi Bar-Lev 82479970+Adi-Amazon@users.noreply.github.com> Signed-off-by: Adi-Amazon <Adi Bar-Lev barlev@amazon.com> Co-authored-by: Adi-Amazon <Adi Bar-Lev 82479970+Adi-Amazon@users.noreply.github.com>
85 lines
3.2 KiB
C++
85 lines
3.2 KiB
C++
/*
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* Copyright (c) Contributors to the Open 3D Engine Project.
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* For complete copyright and license terms please see the LICENSE at the root of this distribution.
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*
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* SPDX-License-Identifier: Apache-2.0 OR MIT
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*
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*/
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#pragma once
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#include <AzCore/Memory/SystemAllocator.h>
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#include <Atom/RPI.Public/Pass/FullscreenTrianglePass.h>
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#include <Atom/RPI.Public/Shader/Shader.h>
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#include <Atom/RPI.Public/Shader/ShaderResourceGroup.h>
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#include <Atom/RPI.Public/Shader/ShaderReloadNotificationBus.h>
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#include <TressFX/TressFXConstantBuffers.h>
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#include <Rendering/HairCommon.h>
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#include <Rendering/HairGlobalSettings.h>
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namespace AZ
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{
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namespace Render
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{
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namespace Hair
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{
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class HairFeatureProcessor;
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//! The hair PPLL resolve pass is a full screen pass that runs over the hair fragments list
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//! that were computed in the raster fill pass and resolves their depth order, transparency
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//! and lighting values to be output to display.
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//! Each pixel on the screen will be processed only once and will iterate through the fragments
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//! list associated with the pixel's location.
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//! The full screen resolve pass is using the following Srgs:
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//! - PerPassSrg: hair vertex data data, PPLL buffers and material array
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//! shared by all passes.
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class HairPPLLResolvePass final
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: public RPI::FullscreenTrianglePass
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{
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AZ_RPI_PASS(HairPPLLResolvePass);
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public:
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AZ_RTTI(HairPPLLResolvePass, "{240940C1-4A47-480D-8B16-176FF3359B01}", RPI::FullscreenTrianglePass);
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AZ_CLASS_ALLOCATOR(HairPPLLResolvePass, SystemAllocator, 0);
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~HairPPLLResolvePass() = default;
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static RPI::Ptr<HairPPLLResolvePass> Create(const RPI::PassDescriptor& descriptor);
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bool AcquireFeatureProcessor();
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void SetFeatureProcessor(HairFeatureProcessor* featureProcessor)
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{
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m_featureProcessor = featureProcessor;
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}
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//! Override pass behavior methods
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void InitializeInternal() override;
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void CompileResources(const RHI::FrameGraphCompileContext& context) override;
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private:
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AZ::Name o_enableShadows;
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AZ::Name o_enableDirectionalLights;
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AZ::Name o_enablePunctualLights;
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AZ::Name o_enableAreaLights;
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AZ::Name o_enableIBL;
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AZ::Name o_hairLightingModel;
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AZ::Name o_enableMarschner_R;
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AZ::Name o_enableMarschner_TRT;
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AZ::Name o_enableMarschner_TT;
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AZ::Name o_enableLongtitudeCoeff;
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AZ::Name o_enableAzimuthCoeff;
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HairPPLLResolvePass(const RPI::PassDescriptor& descriptor);
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void UpdateGlobalShaderOptions();
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HairGlobalSettings m_hairGlobalSettings;
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HairFeatureProcessor* m_featureProcessor = nullptr;
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AZ::RPI::ShaderVariantKey m_shaderOptions;
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};
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} // namespace Hair
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} // namespace Render
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} // namespace AZ
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