FogRendering.h

Go to the documentation of this file.

// Copyright Epic Games, Inc. All Rights Reserved.
 
/*=============================================================================
    FogRendering.h: 
=============================================================================*/
 
#pragma once
 
#include "ShaderParameterMacros.h"
#include "RenderGraphFwd.h"
 
class FSceneViewFamily;
class FScene;
class FViewInfo;
 
BEGIN_GLOBAL_SHADER_PARAMETER_STRUCT(FFogUniformParameters,)
    SHADER_PARAMETER(FVector4f, ExponentialFogParameters)
    SHADER_PARAMETER(FVector4f, ExponentialFogParameters2)
    SHADER_PARAMETER(FVector4f, ExponentialFogColorParameter)
    SHADER_PARAMETER(FVector4f, ExponentialFogParameters3)
    SHADER_PARAMETER(FVector4f, SkyAtmosphereAmbientContributionColorScale)
    SHADER_PARAMETER(FVector4f, InscatteringLightDirection) // non negative DirectionalInscatteringStartDistance in .W
    SHADER_PARAMETER(FVector4f, DirectionalInscatteringColor)
    SHADER_PARAMETER(FVector2f, SinCosInscatteringColorCubemapRotation)
    SHADER_PARAMETER(FVector3f, FogInscatteringTextureParameters)
    SHADER_PARAMETER(float, EndDistance)
    SHADER_PARAMETER(float, ApplyVolumetricFog)
    SHADER_PARAMETER(float, VolumetricFogStartDistance)
    SHADER_PARAMETER(float, VolumetricFogNearFadeInDistanceInv)
    SHADER_PARAMETER(FVector3f, VolumetricFogAlbedo)
    SHADER_PARAMETER(float, VolumetricFogPhaseG)
    SHADER_PARAMETER_TEXTURE(TextureCube, FogInscatteringColorCubemap)
    SHADER_PARAMETER_SAMPLER(SamplerState, FogInscatteringColorSampler)
    SHADER_PARAMETER_RDG_TEXTURE(Texture3D, IntegratedLightScattering)
    SHADER_PARAMETER_SAMPLER(SamplerState, IntegratedLightScatteringSampler)
END_GLOBAL_SHADER_PARAMETER_STRUCT()
 
extern void SetupFogUniformParameters(FRDGBuilder& GraphBuilder, const FViewInfo& View, FFogUniformParameters& OutParameters, bool bForRealtimeSkyCapture = false);
TRDGUniformBufferRef<FFogUniformParameters> CreateFogUniformBuffer(FRDGBuilder& GraphBuilder, const FViewInfo& View);
 
extern bool ShouldRenderFog(const FSceneViewFamily& Family);
 
extern float GetViewFogCommonStartDistance(const FViewInfo& View, bool bShouldRenderVolumetricFog, bool bShouldRenderLocalFogVolumes);
extern float GetFogDefaultStartDistance();
 
extern void RenderFogOnClouds(
    FRDGBuilder& GraphBuilder,
    const FScene* Scene,
    const FViewInfo& View,
    FRDGTextureRef SrcCloudDepth,
    FRDGTextureRef SrcCloudView,
    FRDGTextureRef DstCloudView,
    const bool bShouldRenderVolumetricFog,
    const bool bUseVolumetricRenderTarget);