TPwcDistribution2D.h

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#pragma once
 
#include "Math/Geometry/TAABB2D.h"
#include "Math/TVector2.h"
#include "Math/Random/TPwcDistribution1D.h"
 
#include <cstddef>
#include <vector>
#include <array>
 
namespace ph::math
{
 
template<typename T>
class TPwcDistribution2D final
{
public:
    TPwcDistribution2D(
        const TAABB2D<T>&            range, 
        const T*                     weights, 
        const TVector2<std::size_t>& numWeights);
 
    TPwcDistribution2D(
        const T*                     weights,
        const TVector2<std::size_t>& numWeights);
 
    TPwcDistribution2D();
 
    // PDFs returned by these methods are never zero.
    TVector2<T> sampleContinuous(const std::array<T, 2>& sample, T* out_pdf) const;
 
    T pdfContinuous(const std::array<T, 2>& sample) const;
 
private:
    TPwcDistribution1D<T>              m_marginalYs;
    std::vector<TPwcDistribution1D<T>> m_conditionalXs;
};
 
}// end namespace ph::math
 
#include "Math/Random/TPwcDistribution2D.ipp"