HairStrandsRasterCommon.h

Go to the documentation of this file.

// Copyright Epic Games, Inc. All Rights Reserved.
 
/*=============================================================================
    HairRendering.h: Hair rendering implementation.
=============================================================================*/
 
#pragma once
 
#include "CoreMinimal.h"
#include "RendererInterface.h"
#include "InstanceCulling/InstanceCullingContext.h"
#include "HairStrands/HairStrandsData.h"
#include "SceneView.h"
 
class FViewInfo;
class FInstanceCullingManager;
 
enum class EHairStrandsRasterPassType : uint8
{
    FrontDepth,
    DeepOpacityMap
};
 
// ////////////////////////////////////////////////////////////////
// Deep shadow raster pass
 
BEGIN_GLOBAL_SHADER_PARAMETER_STRUCT(FHairDeepShadowRasterUniformParameters, RENDERER_API)
    SHADER_PARAMETER(uint32, AtlasSlotIndex)
    SHADER_PARAMETER(FVector4f, LayerDepths)
    SHADER_PARAMETER_RDG_TEXTURE(Texture2D<float>, FrontDepthTexture)
    SHADER_PARAMETER_RDG_BUFFER_SRV(StructuredBuffer<FDeepShadowViewInfo>, DeepShadowViewInfoBuffer)
END_GLOBAL_SHADER_PARAMETER_STRUCT()
 
BEGIN_SHADER_PARAMETER_STRUCT(FHairDeepShadowRasterPassParameters, RENDERER_API)
    SHADER_PARAMETER_STRUCT_REF(FViewUniformShaderParameters, View)
    SHADER_PARAMETER_STRUCT_INCLUDE(FInstanceCullingDrawParams, InstanceCullingDrawParams)
    SHADER_PARAMETER_RDG_UNIFORM_BUFFER(FHairDeepShadowRasterUniformParameters, UniformBuffer)
    RENDER_TARGET_BINDING_SLOTS()
END_SHADER_PARAMETER_STRUCT()
 
void AddHairDeepShadowRasterPass(
    FRDGBuilder& GraphBuilder,
    const FScene* Scene,
    const FViewInfo* ViewInfo,
    const FHairStrandsMacroGroupData::TPrimitiveInfos& PrimitiveSceneInfos,
    const EHairStrandsRasterPassType ShadowPassType,
    const FIntPoint& ViewportRect,
    const FVector4f& HairRenderInfo,
    const uint32 HairRenderInfoBits,
    const FVector3f& LightDirection,
    FHairDeepShadowRasterPassParameters* PassParameters,
    FInstanceCullingManager& InstanceCullingManager);