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11
README.md
11
README.md
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# UnrealFixedMath
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# UnrealFixedPoint
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A fixed point math library for Unreal Engine.
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A fixed point math library for Unreal Engine.
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@ -18,15 +18,6 @@ This library aims to closely match the interface and functionality of the existi
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- [ ] Fixed point version of FRotator
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- [ ] Fixed point version of FRotator
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- [ ] FFixedRotator class implementation
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- [ ] FFixedRotator class implementation
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- [ ] Corresponding FMath and UKismetMathLibrary utility functions
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- [ ] Corresponding FMath and UKismetMathLibrary utility functions
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- [ ] Blueprints
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- [ ] Expose fixed arithmatic as pure Blueprint nodes
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- [ ] Ability to edit fixed nums with float sliders/input fields
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- [ ] Automatically do float <> fixed conversion when tweaking fixed point numbers in the editor
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- [ ] Plugin config
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- [ ] Configure how fixed nums are shown in editor when exposed as UPROPERTY (as floats only, as float and underlying int, as underlying int only)
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- [ ] Handling errors and edge cases
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- [ ] Overflow
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- [ ] Infinity
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### What is fixed point math?
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### What is fixed point math?
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// UnrealFixedPoint Copyright Kevin Poretti
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#include "Fixed.h"
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// Copyright Epic Games, Inc. All Rights Reserved.
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#include "UnrealFixedMathBPLibrary.h"
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#include "UnrealFixedMath.h"
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UUnrealFixedMathBPLibrary::UUnrealFixedMathBPLibrary(const FObjectInitializer& ObjectInitializer)
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: Super(ObjectInitializer)
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{
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}
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float UUnrealFixedMathBPLibrary::UnrealFixedMathSampleFunction(float Param)
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{
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return -1;
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}
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// UnrealFixedMath 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 UNREALFIXEDMATH_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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// Copyright Epic Games, Inc. All Rights Reserved.
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// Copyright Epic Games, Inc. All Rights Reserved.
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#include "UnrealFixedMath.h"
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#include "UnrealFixedPoint.h"
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#define LOCTEXT_NAMESPACE "FUnrealFixedMathModule"
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#define LOCTEXT_NAMESPACE "FUnrealFixedPointModule"
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void FUnrealFixedMathModule::StartupModule()
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void FUnrealFixedPointModule::StartupModule()
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{
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{
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// This code will execute after your module is loaded into memory; the exact timing is specified in the .uplugin file per-module
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// This code will execute after your module is loaded into memory; the exact timing is specified in the .uplugin file per-module
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}
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}
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void FUnrealFixedMathModule::ShutdownModule()
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void FUnrealFixedPointModule::ShutdownModule()
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{
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{
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// This function may be called during shutdown to clean up your module. For modules that support dynamic reloading,
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// This function may be called during shutdown to clean up your module. For modules that support dynamic reloading,
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// we call this function before unloading the module.
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// we call this function before unloading the module.
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@ -19,4 +19,4 @@ void FUnrealFixedMathModule::ShutdownModule()
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#undef LOCTEXT_NAMESPACE
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#undef LOCTEXT_NAMESPACE
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IMPLEMENT_MODULE(FUnrealFixedMathModule, UnrealFixedMath)
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IMPLEMENT_MODULE(FUnrealFixedPointModule, UnrealFixedPoint)
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// Copyright Epic Games, Inc. All Rights Reserved.
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#include "UnrealFixedPointBPLibrary.h"
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#include "UnrealFixedPoint.h"
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UUnrealFixedPointBPLibrary::UUnrealFixedPointBPLibrary(const FObjectInitializer& ObjectInitializer)
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: Super(ObjectInitializer)
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{
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}
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float UUnrealFixedPointBPLibrary::UnrealFixedPointSampleFunction(float Param)
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{
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return -1;
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}
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#include "Modules/ModuleManager.h"
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#include "Modules/ModuleManager.h"
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class FUnrealFixedMathModule : public IModuleInterface
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class FUnrealFixedPointModule : public IModuleInterface
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{
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{
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public:
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public:
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#pragma once
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#pragma once
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#include "Kismet/BlueprintFunctionLibrary.h"
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#include "Kismet/BlueprintFunctionLibrary.h"
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#include "UnrealFixedMathBPLibrary.generated.h"
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#include "UnrealFixedPointBPLibrary.generated.h"
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/*
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/*
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* Function library class.
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* Function library class.
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* https://wiki.unrealengine.com/Custom_Blueprint_Node_Creation
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* https://wiki.unrealengine.com/Custom_Blueprint_Node_Creation
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*/
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*/
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UCLASS()
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UCLASS()
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class UUnrealFixedMathBPLibrary : public UBlueprintFunctionLibrary
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class UUnrealFixedPointBPLibrary : public UBlueprintFunctionLibrary
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{
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{
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GENERATED_UCLASS_BODY()
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GENERATED_UCLASS_BODY()
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UFUNCTION(BlueprintCallable, meta = (DisplayName = "Execute Sample function", Keywords = "UnrealFixedMath sample test testing"), Category = "UnrealFixedMathTesting")
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UFUNCTION(BlueprintCallable, meta = (DisplayName = "Execute Sample function", Keywords = "UnrealFixedPoint sample test testing"), Category = "UnrealFixedPointTesting")
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static float UnrealFixedMathSampleFunction(float Param);
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static float UnrealFixedPointSampleFunction(float Param);
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};
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};
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// UnrealFixedMath Copyright Kevin Poretti
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// Some copyright should be here...
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using UnrealBuildTool;
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using UnrealBuildTool;
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public class UnrealFixedMath : ModuleRules
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public class UnrealFixedPoint : ModuleRules
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{
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{
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public UnrealFixedMath(ReadOnlyTargetRules Target) : base(Target)
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public UnrealFixedPoint(ReadOnlyTargetRules Target) : base(Target)
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{
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{
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PCHUsage = ModuleRules.PCHUsageMode.UseExplicitOrSharedPCHs;
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PCHUsage = ModuleRules.PCHUsageMode.UseExplicitOrSharedPCHs;
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"FileVersion": 3,
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"FileVersion": 3,
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"Version": 1,
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"Version": 1,
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"VersionName": "1.0",
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"VersionName": "1.0",
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"FriendlyName": "Unreal Fixed Math",
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"FriendlyName": "UnrealFixedPoint",
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"Description": "This library provides a fixed point number primitive with corresponding data types that are useful for game development (i.e. vector, rotator, transform).",
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"Description": "This library provides a fixed point number primitive with corresponding data types that are useful for game development (i.e. vector, rotator, transform).",
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"Category": "Math",
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"Category": "Math",
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"CreatedBy": "Kevin Poretti",
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"CreatedBy": "Kevin Poretti",
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"Installed": false,
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"Installed": false,
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"Modules": [
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"Modules": [
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{
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{
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"Name": "UnrealFixedMath",
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"Name": "UnrealFixedPoint",
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"Type": "Runtime",
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"Type": "Runtime",
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"LoadingPhase": "PreLoadingScreen"
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"LoadingPhase": "PreLoadingScreen"
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}
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}
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