55 lines
1.4 KiB
C++
55 lines
1.4 KiB
C++
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#include <mitsuba/render/medium.h>
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MTS_NAMESPACE_BEGIN
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/**
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* Basic isotropic phase function
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*/
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class IsotropicPhaseFunction : public PhaseFunction {
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public:
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IsotropicPhaseFunction(const Properties &props)
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: PhaseFunction(props) {
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}
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IsotropicPhaseFunction(Stream *stream, InstanceManager *manager)
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: PhaseFunction(stream, manager) {
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}
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virtual ~IsotropicPhaseFunction() { }
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void serialize(Stream *stream, InstanceManager *manager) const {
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PhaseFunction::serialize(stream, manager);
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}
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Spectrum sample(const MediumSamplingRecord &mRec, const Vector &wi, Vector &wo,
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ESampledType &sampledType, const Point2 &sample) const {
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wo = squareToSphere(sample);
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sampledType = ENormal;
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return Spectrum(1.0f);
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}
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Spectrum sample(const MediumSamplingRecord &mRec, const Vector &wi, Vector &wo,
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ESampledType &sampledType, Float &pdf, const Point2 &sample) const {
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wo = squareToSphere(sample);
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sampledType = ENormal;
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pdf = 1/(4 * (Float) M_PI);
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return Spectrum(pdf);
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}
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Spectrum f(const MediumSamplingRecord &mRec, const Vector &wi, const Vector &wo) const {
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return Spectrum(1/(4 * (Float) M_PI));
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}
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std::string toString() const {
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return "IsotropicPhaseFunction[]";
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}
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MTS_DECLARE_CLASS()
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};
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MTS_IMPLEMENT_CLASS_S(IsotropicPhaseFunction, false, PhaseFunction)
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MTS_EXPORT_PLUGIN(IsotropicPhaseFunction, "Isotropic phase function");
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MTS_NAMESPACE_END
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