PrimitiveViewRelevance.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreMinimal.h"
#include "Materials/MaterialRelevance.h"
 
PRAGMA_DISABLE_DEPRECATION_WARNINGS
struct FPrimitiveViewRelevance : public FMaterialRelevance
{
    // Warning: This class is memzeroed externally as 0 is assumed a
    // valid value for all members meaning 'not relevant'. If this
    // changes existing class usage should be re-evaluated
 
    uint32 bStaticRelevance : 1; 
    uint32 bDynamicRelevance : 1;
    uint32 bDrawRelevance : 1;
    uint32 bShadowRelevance : 1;
    uint32 bVelocityRelevance : 1;
    uint32 bRenderCustomDepth : 1;
    uint32 bRenderInDepthPass : 1;
    uint32 bRenderInMainPass : 1;
    uint32 bEditorPrimitiveRelevance : 1;
    uint32 bEditorVisualizeLevelInstanceRelevance : 1;
    uint32 bEditorStaticSelectionRelevance : 1;
    uint32 bEditorNoDepthTestPrimitiveRelevance : 1;
    uint32 bHasSimpleLights : 1;
    uint32 bUsesLightingChannels : 1;
    uint32 bTranslucentSelfShadow : 1;
    uint32 bRenderInSecondStageDepthPass : 1;
 
    uint32 bInitializedThisFrame : 1;
 
    bool HasTranslucency() const 
    {
        return bNormalTranslucency || bSeparateTranslucency || bTranslucencyModulate || bPostMotionBlurTranslucency;
    }
 
    bool HasVelocity() const
    {
        return bVelocityRelevance || bOutputsTranslucentVelocity;
    }
 
    FPrimitiveViewRelevance()
    {
        // the class is only storing bits, the following avoids code redundancy
        uint8 * RESTRICT p = (uint8*)this;
        for(uint32 i = 0; i < sizeof(*this); ++i)
        {
            *p++ = 0;
        }
 
        // only exceptions (bugs we need to fix?):
 
        bOpaque = true;
        // without it BSP doesn't render
        bRenderInMainPass = true;
    }
 
    FPrimitiveViewRelevance& operator|=(const FPrimitiveViewRelevance& B)
    {
        // the class is only storing bits, the following avoids code redundancy
        const uint8 * RESTRICT s = (const uint8*)&B;
        uint8 * RESTRICT d = (uint8*)this;
        for(uint32 i = 0; i < sizeof(*this); ++i)
        {
            *d = *d | *s; 
            ++s;++d;
        }
        return *this;
    }
};
PRAGMA_ENABLE_DEPRECATION_WARNINGS