lux::SkyLight Class Reference

#include <sky.h>

Inheritance diagram for lux::SkyLight:
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Collaboration diagram for lux::SkyLight:
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List of all members.

Public Member Functions

 SkyLight (const Transform &light2world, const float skyscale, int ns, Vector sd, float turb, float aconst, float bconst, float cconst, float dconst, float econst)
virtual ~SkyLight ()
virtual SWCSpectrum Power (const TsPack *tspack, const Scene *scene) const
virtual bool IsDeltaLight () const
virtual bool IsEnvironmental () const
virtual SWCSpectrum Le (const TsPack *tspack, const RayDifferential &r) const
virtual SWCSpectrum Le (const TsPack *tspack, const Scene *scene, const Ray &r, const Normal &n, BSDF **bsdf, float *pdf, float *pdfDirect) const
virtual SWCSpectrum Sample_L (const TsPack *tspack, const Point &p, const Normal &n, float u1, float u2, float u3, Vector *wi, float *pdf, VisibilityTester *visibility) const
virtual SWCSpectrum Sample_L (const TsPack *tspack, const Point &p, float u1, float u2, float u3, Vector *wi, float *pdf, VisibilityTester *visibility) const
virtual SWCSpectrum Sample_L (const TsPack *tspack, const Scene *scene, float u1, float u2, float u3, float u4, Ray *ray, float *pdf) const
virtual float Pdf (const Point &, const Normal &, const Vector &) const
virtual float Pdf (const Point &, const Vector &) const
virtual float Pdf (const Point &p, const Normal &n, const Point &po, const Normal &ns) const
virtual bool Sample_L (const TsPack *tspack, const Scene *scene, float u1, float u2, float u3, BSDF **bsdf, float *pdf, SWCSpectrum *Le) const
virtual bool Sample_L (const TsPack *tspack, const Scene *scene, const Point &p, const Normal &n, float u1, float u2, float u3, BSDF **bsdf, float *pdf, float *pdfDirect, VisibilityTester *visibility, SWCSpectrum *Le) const
void GetSkySpectralRadiance (const TsPack *tspack, const float theta, const float phi, SWCSpectrum *const dst_spect) const

Static Public Member Functions

static Light * CreateLight (const Transform &light2world, const ParamSet &paramSet, const TextureParams &tp)

Private Member Functions

Vector GetSunPosition () const
void SunThetaPhi (float &theta, float &phi) const
RGBColor GetSunSpectralRadiance () const
float GetSunSolidAngle () const
void GetAtmosphericEffects (const Vector &viewer, const Vector &source, RGBColor &atmAttenuation, RGBColor &atmInscatter) const
void InitSunThetaPhi ()
void ChromaticityToSpectrum (const TsPack *tspack, const float x, const float y, SWCSpectrum *const dst_spect) const

Private Attributes

float skyScale
Vector sundir
float turbidity
float thetaS
float phiS
float zenith_Y
float zenith_x
float zenith_y
float perez_Y [6]
float perez_x [6]
float perez_y [6]

Detailed Description

Definition at line 35 of file sky.h.

Constructor & Destructor Documentation

SkyLight::SkyLight ( const Transform &  light2world,
const float  skyscale,
int  ns,
Vector  sd,
float  turb,
float  aconst,
float  bconst,
float  cconst,
float  dconst,
float  econst 
)

Definition at line 142 of file sky.cpp.

References InitSunThetaPhi(), M_PI, perez_x, perez_y, perez_Y, PerezBase(), skyScale, sundir, cimg_library::tan(), thetaS, turbidity, zenith_x, zenith_y, and zenith_Y.

Referenced by CreateLight().

SkyLight::~SkyLight (  )  [virtual]

Definition at line 139 of file sky.cpp.

Member Function Documentation

void SkyLight::ChromaticityToSpectrum ( const TsPack *  tspack,
const float  x,
const float  y,
SWCSpectrum *const   dst_spect 
) const [private]

Definition at line 619 of file sky.cpp.

References lux::SWCSpectrum::c, S0(), S0Y, S1(), S2(), lux::SPD::sample(), lux::TsPack::swl, lux::SpectrumWavelengths::w, and WAVELENGTH_SAMPLES.

Referenced by GetSkySpectralRadiance().

Light * SkyLight::CreateLight ( const Transform &  light2world,
const ParamSet &  paramSet,
const TextureParams &  tp 
) [static]

Definition at line 557 of file sky.cpp.

References lux::ParamSet::FindOneFloat(), lux::ParamSet::FindOneInt(), lux::ParamSet::FindOneVector(), lux::Normalize(), lux::Light::nSamples, SkyLight(), and sundir.

void lux::SkyLight::GetAtmosphericEffects ( const Vector &  viewer,
const Vector &  source,
RGBColor &  atmAttenuation,
RGBColor &  atmInscatter 
) const [private]
void SkyLight::GetSkySpectralRadiance ( const TsPack *  tspack,
const float  theta,
const float  phi,
SWCSpectrum *const   dst_spect 
) const

Definition at line 603 of file sky.cpp.

References ChromaticityToSpectrum(), M_PI, cimg_library::cimg::min(), perez_x, perez_Y, perez_y, PerezBase(), phiS, RiAngleBetween(), thetaS, zenith_x, zenith_Y, and zenith_y.

Referenced by SkyPortalBxDF::f(), SkyBxDF::f(), Le(), Power(), and SkyPortalBxDF::Sample_f().

Vector lux::SkyLight::GetSunPosition (  )  const [private]
float lux::SkyLight::GetSunSolidAngle (  )  const [private]
RGBColor lux::SkyLight::GetSunSpectralRadiance (  )  const [private]
void SkyLight::InitSunThetaPhi (  )  [private]

Definition at line 589 of file sky.cpp.

References lux::Normalize(), phiS, lux::SphericalPhi(), lux::SphericalTheta(), sundir, and thetaS.

Referenced by SkyLight().

virtual bool lux::SkyLight::IsDeltaLight (  )  const [inline, virtual]

Implements lux::Light.

Definition at line 50 of file sky.h.

virtual bool lux::SkyLight::IsEnvironmental (  )  const [inline, virtual]

Implements lux::Light.

Definition at line 51 of file sky.h.

SWCSpectrum SkyLight::Le ( const TsPack *  tspack,
const Scene *  scene,
const Ray &  r,
const Normal &  n,
BSDF **  bsdf,
float *  pdf,
float *  pdfDirect 
) const [virtual]

Reimplemented from lux::Light.

Definition at line 208 of file sky.cpp.

References lux::AbsDot(), lux::BBox::BoundingSphere(), BSDF_ALLOC, lux::CoordinateSystem(), lux::Ray::d, lux::Intersection::dg, lux::DistanceSquared(), lux::Dot(), GetSkySpectralRadiance(), lux::Light::havePortalShape, INV_TWOPI, lux::Vector::LengthSquared(), M_PI, lux::Ray::mint, lux::DifferentialGeometry::nn, lux::Normalize(), lux::Light::nrPortalShapes, lux::Ray::o, lux::DifferentialGeometry::p, lux::Light::PortalShapes, skyScale, lux::SphericalPhi(), lux::SphericalTheta(), lux::TsPack::time, lux::DifferentialGeometry::time, lux::Scene::WorldBound(), and lux::Light::WorldToLight.

SWCSpectrum SkyLight::Le ( const TsPack *  tspack,
const RayDifferential &  r 
) const [virtual]

Reimplemented from lux::Light.

Definition at line 194 of file sky.cpp.

References lux::Ray::d, GetSkySpectralRadiance(), lux::Normalize(), skyScale, lux::SphericalPhi(), lux::SphericalTheta(), and lux::Light::WorldToLight.

Referenced by Sample_L().

float SkyLight::Pdf ( const Point &  p,
const Normal &  n,
const Point &  po,
const Normal &  ns 
) const [virtual]

Implements lux::Light.

Definition at line 318 of file sky.cpp.

References lux::AbsDot(), lux::Intersection::dg, lux::DistanceSquared(), lux::Dot(), lux::Light::havePortalShape, INV_TWOPI, lux::Vector::LengthSquared(), lux::Ray::mint, lux::DifferentialGeometry::nn, lux::Light::nrPortalShapes, lux::DifferentialGeometry::p, and lux::Light::PortalShapes.

float SkyLight::Pdf ( const Point &  ,
const Vector &   
) const [virtual]

Implements lux::Light.

Definition at line 369 of file sky.cpp.

References M_PI.

float SkyLight::Pdf ( const Point &  p,
const Normal &  n,
const Vector &  wi 
) const [virtual]

Reimplemented from lux::Light.

Definition at line 302 of file sky.cpp.

References lux::AbsDot(), lux::Intersection::dg, lux::Dot(), lux::Light::havePortalShape, INV_TWOPI, lux::DifferentialGeometry::nn, lux::Light::nrPortalShapes, and lux::Light::PortalShapes.

virtual SWCSpectrum lux::SkyLight::Power ( const TsPack *  tspack,
const Scene *  scene 
) const [inline, virtual]

Implements lux::Light.

Definition at line 40 of file sky.h.

References lux::BBox::BoundingSphere(), GetSkySpectralRadiance(), lux::Light::havePortalShape, M_PI, lux::Light::PortalArea, and lux::Scene::WorldBound().

bool SkyLight::Sample_L ( const TsPack *  tspack,
const Scene *  scene,
const Point &  p,
const Normal &  n,
float  u1,
float  u2,
float  u3,
BSDF **  bsdf,
float *  pdf,
float *  pdfDirect,
VisibilityTester *  visibility,
SWCSpectrum *  Le 
) const [virtual]

Reimplemented from lux::Light.

Definition at line 466 of file sky.cpp.

References lux::AbsDot(), lux::BBox::BoundingSphere(), BSDF_ALLOC, lux::ConcentricSampleDisk(), lux::CoordinateSystem(), lux::Intersection::dg, lux::DistanceSquared(), lux::Dot(), Floor2Int(), lux::Light::havePortalShape, INV_TWOPI, lux::Vector::LengthSquared(), M_PI, cimg_library::cimg::max(), cimg_library::cimg::min(), lux::Ray::mint, lux::DifferentialGeometry::nn, lux::Normalize(), lux::Light::nrPortalShapes, lux::DifferentialGeometry::p, lux::Light::PortalShapes, lux::VisibilityTester::SetSegment(), skyScale, lux::TsPack::time, lux::DifferentialGeometry::time, lux::Scene::WorldBound(), lux::Light::WorldToLight, lux::Vector::x, lux::Vector::y, and lux::Vector::z.

bool SkyLight::Sample_L ( const TsPack *  tspack,
const Scene *  scene,
float  u1,
float  u2,
float  u3,
BSDF **  bsdf,
float *  pdf,
SWCSpectrum *  Le 
) const [virtual]

Reimplemented from lux::Light.

Definition at line 412 of file sky.cpp.

References lux::AbsDot(), lux::BBox::BoundingSphere(), BSDF_ALLOC, lux::CoordinateSystem(), lux::Dot(), lux::DifferentialGeometry::dpdu, lux::DifferentialGeometry::dpdv, Floor2Int(), lux::Light::havePortalShape, INV_TWOPI, M_PI, cimg_library::cimg::min(), lux::DifferentialGeometry::nn, lux::Normalize(), lux::Light::nrPortalShapes, lux::DifferentialGeometry::p, lux::Light::PortalShapes, skyScale, lux::TsPack::time, lux::DifferentialGeometry::time, lux::UniformSampleHemisphere(), lux::UniformSampleSphere(), lux::Scene::WorldBound(), lux::Light::WorldToLight, lux::Vector::x, lux::Vector::y, and lux::Vector::z.

SWCSpectrum SkyLight::Sample_L ( const TsPack *  tspack,
const Scene *  scene,
float  u1,
float  u2,
float  u3,
float  u4,
Ray *  ray,
float *  pdf 
) const [virtual]

Implements lux::Light.

Definition at line 372 of file sky.cpp.

References lux::AbsDot(), lux::BBox::BoundingSphere(), lux::Ray::d, lux::Dot(), lux::RandomGenerator::floatValue(), Floor2Int(), lux::Light::havePortalShape, INV_TWOPI, Le(), M_PI, cimg_library::cimg::min(), lux::DifferentialGeometry::nn, lux::Normalize(), lux::Light::nrPortalShapes, lux::Ray::o, lux::DifferentialGeometry::p, lux::Light::PortalShapes, lux::TsPack::rng, lux::TsPack::time, lux::DifferentialGeometry::time, lux::UniformSampleSphere(), and lux::Scene::WorldBound().

SWCSpectrum SkyLight::Sample_L ( const TsPack *  tspack,
const Point &  p,
float  u1,
float  u2,
float  u3,
Vector *  wi,
float *  pdf,
VisibilityTester *  visibility 
) const [virtual]

Implements lux::Light.

Definition at line 339 of file sky.cpp.

References lux::Dot(), Floor2Int(), lux::Light::havePortalShape, Le(), cimg_library::cimg::min(), lux::DifferentialGeometry::nn, lux::Normalize(), lux::Light::nrPortalShapes, lux::DifferentialGeometry::p, lux::Light::PortalShapes, lux::VisibilityTester::SetRay(), lux::TsPack::time, lux::DifferentialGeometry::time, lux::UniformSampleSphere(), and lux::UniformSpherePdf().

SWCSpectrum SkyLight::Sample_L ( const TsPack *  tspack,
const Point &  p,
const Normal &  n,
float  u1,
float  u2,
float  u3,
Vector *  wi,
float *  pdf,
VisibilityTester *  visibility 
) const [virtual]

Reimplemented from lux::Light.

Definition at line 259 of file sky.cpp.

References lux::ConcentricSampleDisk(), lux::CoordinateSystem(), lux::Dot(), Floor2Int(), lux::Light::havePortalShape, INV_TWOPI, Le(), cimg_library::cimg::max(), cimg_library::cimg::min(), lux::DifferentialGeometry::nn, lux::Normalize(), lux::Light::nrPortalShapes, lux::DifferentialGeometry::p, lux::Light::PortalShapes, lux::VisibilityTester::SetRay(), lux::TsPack::time, lux::DifferentialGeometry::time, lux::Normal::x, lux::Vector::x, lux::Normal::y, lux::Vector::y, lux::Normal::z, and lux::Vector::z.

void lux::SkyLight::SunThetaPhi ( float &  theta,
float &  phi 
) const [private]

Member Data Documentation

float lux::SkyLight::perez_x[6] [private]

Definition at line 91 of file sky.h.

Referenced by GetSkySpectralRadiance(), and SkyLight().

float lux::SkyLight::perez_y[6] [private]

Definition at line 91 of file sky.h.

Referenced by GetSkySpectralRadiance(), and SkyLight().

float lux::SkyLight::perez_Y[6] [private]

Definition at line 91 of file sky.h.

Referenced by GetSkySpectralRadiance(), and SkyLight().

float lux::SkyLight::phiS [private]

Definition at line 89 of file sky.h.

Referenced by GetSkySpectralRadiance(), and InitSunThetaPhi().

float lux::SkyLight::skyScale [private]

Definition at line 86 of file sky.h.

Referenced by Le(), Sample_L(), and SkyLight().

Vector lux::SkyLight::sundir [private]

Definition at line 87 of file sky.h.

Referenced by CreateLight(), InitSunThetaPhi(), and SkyLight().

float lux::SkyLight::thetaS [private]

Definition at line 89 of file sky.h.

Referenced by GetSkySpectralRadiance(), InitSunThetaPhi(), and SkyLight().

float lux::SkyLight::turbidity [private]

Definition at line 88 of file sky.h.

Referenced by SkyLight().

float lux::SkyLight::zenith_x [private]

Definition at line 90 of file sky.h.

Referenced by GetSkySpectralRadiance(), and SkyLight().

float lux::SkyLight::zenith_y [private]

Definition at line 90 of file sky.h.

Referenced by GetSkySpectralRadiance(), and SkyLight().

float lux::SkyLight::zenith_Y [private]

Definition at line 90 of file sky.h.

Referenced by GetSkySpectralRadiance(), and SkyLight().

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