TranslationMatrix.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreTypes.h"
#include "Math/Vector.h"
#include "Math/Plane.h"
#include "Math/Matrix.h"
 
namespace UE {
namespace Math {
 
template<typename T>
struct TTranslationMatrix
    : public TMatrix<T>
{
public:
 
    /** Constructor translation matrix based on given vector */
    TTranslationMatrix(const TVector<T>& Delta);
 
    // Conversion to other type.
    template<typename FArg, TEMPLATE_REQUIRES(!std::is_same_v<T, FArg>)>
    explicit TTranslationMatrix(const TTranslationMatrix<FArg>& From) : TMatrix<T>(From) {}
 
    /** Matrix factory. Return an FMatrix so we don't have type conversion issues in expressions. */
    static TMatrix<T> Make(TVector<T> const& Delta)
    {
        return TTranslationMatrix<T>(Delta);
    }
};
 
template<typename T>
FORCEINLINE TTranslationMatrix<T>::TTranslationMatrix(const TVector<T>& Delta)
    : TMatrix<T>(
        TPlane<T>(1.0f,     0.0f,   0.0f,   0.0f),
        TPlane<T>(0.0f,     1.0f,   0.0f,   0.0f),
        TPlane<T>(0.0f,     0.0f,   1.0f,   0.0f),
        TPlane<T>(Delta.X,  Delta.Y,Delta.Z,1.0f)
    )
{ }
 
} // namespace Math
} // namespace UE
 
UE_DECLARE_LWC_TYPE(TranslationMatrix, 44);
 
template<> struct TIsUECoreVariant<FTranslationMatrix44f> { enum { Value = true }; };
template<> struct TIsUECoreVariant<FTranslationMatrix44d> { enum { Value = true }; };