GridSampler.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "MathUtil.h"
#include "VectorTypes.h"
 
namespace UE
{
namespace Geometry
{
 
template<typename RealType>
class TGridSampler
{
private:
    int32 Size = 1;
 
public:
    TGridSampler(int32 SizeIn)
        : Size(SizeIn)
    {
        checkSlow(Size >= 1);
    }
 
    int32 Num() const
    {
        return Size * Size;
    }
 
    UE::Math::TVector2<RealType> Sample(int32 Index) const
    {
        checkSlow(Index >= 0 && Index < Num());
        RealType X = (static_cast<RealType>(Index % Size) + RealType{ 1 } / RealType{ 2 }) / static_cast<RealType>(Size); //-V1064
        RealType Y = (static_cast<RealType>(Index / Size) + RealType{ 1 } / RealType{ 2 }) / static_cast<RealType>(Size); //-V1064
        return UE::Math::TVector2<RealType>(X, Y);
    }
};
 
} // end namespace UE::Geometry
} // end namespace UE