58 lines
1.6 KiB
C
58 lines
1.6 KiB
C
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// UnrealFixedPoint Copyright Kevin Poretti
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#pragma once
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#include "CoreMinimal.h"
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#include "Fixed.generated.h"
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/**
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*
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*/
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USTRUCT(BlueprintType)
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struct UNREALFIXEDPOINT_API FFixed
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{
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GENERATED_BODY()
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public:
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// 48 bits for the whole portion, 16 bits for the fractional portion
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static constexpr uint8 DecimalBitPosition = 16;
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FFixed() : Data(0) { }
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// int types <> FFixed conversions
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FORCEINLINE FFixed(int64 A) { Data = A << DecimalBitPosition; }
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FORCEINLINE operator int64() const { return Data >> DecimalBitPosition; }
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/*
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int8
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int16
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FORCEINLINE operator uint8()
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*/
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// floating point types <> FFixed conversions
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FORCEINLINE FFixed(float A) { Data = static_cast<int64>(A * (1 << DecimalBitPosition) + (A >= 0 ? 0.5 : -0.5)); }
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FORCEINLINE operator float() const { return static_cast<float>(Data) / (1 << DecimalBitPosition); }
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FORCEINLINE FFixed(double A) { Data = static_cast<int64>(A * (1 << DecimalBitPosition) + (A >= 0 ? 0.5 : -0.5)); }
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FORCEINLINE operator double() const { return static_cast<double>(Data) / (1 << DecimalBitPosition); }
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// Arithmetic
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FFixed operator+(const FFixed& Other) const { return Data + Other.Data; }
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FFixed operator+=(const FFixed& Other) { Data += Other.Data; return Data; }
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FFixed operator-(const FFixed& Other) const { return Data - Other.Data; }
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FFixed operator-=(const FFixed& Other) { Data -= Other.Data; return Data; }
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// Other overloads
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FFixed operator=(const FFixed& Other) { Data = Other.Data; return Data; }
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FFixed operator-() const { return -Data; }
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private:
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int64 Data;
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};
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namespace FFixedMath
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{
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}
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