HenyeyGreenstein.h

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#pragma once
 
#include "Core/VolumeBehavior/ScatterFunction.h"
#include "Core/Texture/texture_fwd.h"
 
#include <memory>
 
namespace ph
{
 
class HenyeyGreenstein : public ScatterFunction
{
public:
    HenyeyGreenstein(real g);
    HenyeyGreenstein(const std::shared_ptr<TTexture<real>>& g);
    ~HenyeyGreenstein() override;
 
    void evalPhaseFunc(
        const SurfaceHit&     X,
        const math::Vector3R& I,
        const math::Vector3R& O,
        real*                 out_pf) const override;
 
private:
    std::shared_ptr<TTexture<real>> m_g;
};
 
}// end namespace ph