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93 lines
5.1 KiB
C++
93 lines
5.1 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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#include "./SubsurfaceTransmissionParameterFunctor.h"
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#include <Atom/RPI.Public/Material/Material.h>
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#include <Atom/RPI.Public/Shader/ShaderResourceGroup.h>
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#include <Atom/RPI.Public/Pass/PassSystemInterface.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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void SubsurfaceTransmissionParameterFunctor::Reflect(ReflectContext* context)
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{
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if (auto* serializeContext = azrtti_cast<SerializeContext*>(context))
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{
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serializeContext->Class<SubsurfaceTransmissionParameterFunctor, RPI::MaterialFunctor>()
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->Version(2)
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->Field("m_mode", &SubsurfaceTransmissionParameterFunctor::m_mode)
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->Field("m_scale", &SubsurfaceTransmissionParameterFunctor::m_scale)
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->Field("m_power", &SubsurfaceTransmissionParameterFunctor::m_power)
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->Field("m_distortion", &SubsurfaceTransmissionParameterFunctor::m_distortion)
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->Field("m_attenuation", &SubsurfaceTransmissionParameterFunctor::m_attenuation)
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->Field("m_shrinkFactor", &SubsurfaceTransmissionParameterFunctor::m_shrinkFactor)
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->Field("m_transmissionNdLBias", &SubsurfaceTransmissionParameterFunctor::m_transmissionNdLBias)
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->Field("m_distanceAttenuation", &SubsurfaceTransmissionParameterFunctor::m_distanceAttenuation)
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->Field("m_tintColor", &SubsurfaceTransmissionParameterFunctor::m_tintColor)
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->Field("m_thickness", &SubsurfaceTransmissionParameterFunctor::m_thickness)
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->Field("m_enabled", &SubsurfaceTransmissionParameterFunctor::m_enabled)
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->Field("m_scatterDistanceColor", &SubsurfaceTransmissionParameterFunctor::m_scatterDistanceColor)
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->Field("m_scatterDistanceIntensity", &SubsurfaceTransmissionParameterFunctor::m_scatterDistanceIntensity)
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->Field("m_scatterDistance", &SubsurfaceTransmissionParameterFunctor::m_scatterDistance)
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->Field("m_transmissionParams", &SubsurfaceTransmissionParameterFunctor::m_transmissionParams)
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->Field("m_transmissionTintThickness", &SubsurfaceTransmissionParameterFunctor::m_transmissionTintThickness)
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;
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}
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}
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void SubsurfaceTransmissionParameterFunctor::Process(RuntimeContext& context)
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{
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// Build & preprocess all parameters used by subsurface scattering feature
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using namespace RPI;
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enum class TransmissionMode { None, ThickObject, ThinObject };
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auto mode = context.GetMaterialPropertyValue<uint32_t>(m_mode);
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auto scale = context.GetMaterialPropertyValue<float>(m_scale);
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auto power = context.GetMaterialPropertyValue<float>(m_power);
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auto distortion = context.GetMaterialPropertyValue<float>(m_distortion);
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auto attenuation = context.GetMaterialPropertyValue<float>(m_attenuation);
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auto shrinkFactor = context.GetMaterialPropertyValue<float>(m_shrinkFactor);
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auto transmissionNdLBias = context.GetMaterialPropertyValue<float>(m_transmissionNdLBias);
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auto distanceAttenuation = context.GetMaterialPropertyValue<float>(m_distanceAttenuation);
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auto tintColor = context.GetMaterialPropertyValue<Color>(m_tintColor);
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auto thickness = context.GetMaterialPropertyValue<float>(m_thickness);
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auto scatterDistanceColor = context.GetMaterialPropertyValue<Color>(m_scatterDistanceColor);
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auto scatterDistanceIntensity = context.GetMaterialPropertyValue<float>(m_scatterDistanceIntensity);
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Vector3 scatterDistance = Vector3(scatterDistanceColor.GetAsVector3()) * Vector3(scatterDistanceIntensity, scatterDistanceIntensity, scatterDistanceIntensity);
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Vector4 transmissionParams;
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if (mode == static_cast<uint32_t>(TransmissionMode::ThickObject))
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{
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transmissionParams.SetX(attenuation);
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transmissionParams.SetY(power);
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transmissionParams.SetZ(distortion);
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transmissionParams.SetW(scale);
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}
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else
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{
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transmissionParams.SetX(shrinkFactor);
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transmissionParams.SetY(transmissionNdLBias);
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transmissionParams.SetZ(distanceAttenuation);
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transmissionParams.SetW(scale);
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}
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Vector4 transmissionTintThickness;
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transmissionTintThickness.Set(tintColor.GetAsVector3());
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transmissionTintThickness.SetW(thickness);
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context.GetShaderResourceGroup()->SetConstant(m_scatterDistance, scatterDistance);
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context.GetShaderResourceGroup()->SetConstant(m_transmissionParams, transmissionParams);
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context.GetShaderResourceGroup()->SetConstant(m_transmissionTintThickness, transmissionTintThickness);
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}
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} // namespace Render
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} // namespace AZ
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