IesData.h

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#pragma once
 
#include "DataIO/Data/IesFile.h"
#include "DataIO/FileSystem/Path.h"
 
#include <Common/primitive_type.h>
 
#include <vector>
 
namespace ph
{
 
class IesData
{
public:
    explicit IesData(const Path& iesFilePath);
 
    real sampleAttenuationFactor(real theta, real phi) const;
    std::size_t numAttenuationFactorThetaSamples() const;
    std::size_t numAttenuationFactorPhiSamples() const;
 
private:
    IesFile                        m_file;
 
    std::vector<std::vector<real>> m_sphericalCandelas;
 
    std::vector<std::vector<real>> m_sphericalAttenuationFactors;
 
    enum class EReflectFrom
    {
        Theta_Head,
        Theta_Tail,
        Phi_Head,
        Phi_Tail
    };
 
    void processCandelaValues();
    void processAttenuationFactors();
    void reflectCandelaValues(EReflectFrom reflectFrom, real reflectionMultiplier = 1.0_r);
 
    static real calcBicubicWeight(real x);
};
 
}// end namespace ph