PackedVector.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreTypes.h"
#include "Math/NumericLimits.h"
#include "Math/UnrealMathUtility.h"
#include "Math/Color.h"
#include "Templates/TypeCompatibleBytes.h"
 
class FFloat3Packed
{
public: 
    union
    {
        struct
        {
            uint32_t xm : 6; // x-mantissa
            uint32_t xe : 5; // x-exponent
            uint32_t ym : 6; // y-mantissa
            uint32_t ye : 5; // y-exponent
            uint32_t zm : 5; // z-mantissa
            uint32_t ze : 5; // z-exponent
        };
        uint32_t v;
    };
 
    [[nodiscard]] FFloat3Packed() {}
 
    [[nodiscard]] CORE_API explicit FFloat3Packed(const FLinearColor& Src);
 
    [[nodiscard]] CORE_API FLinearColor ToLinearColor() const;
};
 
class FFixedRGBASigned8
{
public: 
    union
    {
        struct
        {
            int8 R;
            int8 G;
            int8 B;
            int8 A;
        };
        uint32 Packed;
    };
 
    FFixedRGBASigned8() {}
 
    explicit CORE_API FFixedRGBASigned8(const FLinearColor& Src);
 
    [[nodiscard]] CORE_API FLinearColor ToLinearColor() const;
};
 
class FFloat3PackedSE
{
public:
 
    union
    {
        struct
        {
            uint32 RMantissa : 9;
            uint32 GMantissa : 9;
            uint32 BMantissa : 9;
            uint32 SharedExponent : 5;
        };
        uint32 EncodedValue;
    };
 
    FFloat3PackedSE() {}
 
    explicit CORE_API FFloat3PackedSE(const FLinearColor& Src);
    explicit FFloat3PackedSE(uint32 InEncodedValue) : EncodedValue(InEncodedValue) {}
 
    [[nodiscard]] CORE_API FLinearColor ToLinearColor() const;
};