ExactConductorFresnel.h

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#pragma once
 
#include "Core/SurfaceBehavior/Property/ConductorFresnel.h"
#include "Math/Color/Spectrum.h"
 
#include <vector>
 
namespace ph
{
 
class ExactConductorFresnel : public ConductorFresnel
{
public:
    ExactConductorFresnel(
        real                  iorOuter,
        const math::Spectrum& iorInnerN,
        const math::Spectrum& iorInnerK);
 
    ExactConductorFresnel(
        real                     iorOuter,
        const std::vector<real>& iorWavelengthsNm, 
        const std::vector<real>& iorInnerNs, 
        const std::vector<real>& iorInnerKs);
 
    math::Spectrum calcReflectance(real cosThetaIncident) const override;
 
private:
    real           m_iorOuter;
    math::Spectrum m_iorInnerN;
    math::Spectrum m_iorInnerK;
    math::Spectrum m_en2_sub_ek2;
    math::Spectrum m_4_mul_en2_mul_ek2;
 
    void setIors(
        real                  iorOuter,
        const math::Spectrum& iorInnerN,
        const math::Spectrum& iorInnerK);
};
 
}// end namespace ph