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00024 #include "lux.h"
00025 #include "light.h"
00026 #include "shape.h"
00027 #include "scene.h"
00028 #include "texture.h"
00029 #include "sphericalfunction.h"
00030
00031 namespace lux
00032 {
00033
00034
00035 class PointLight : public Light {
00036 public:
00037
00038 PointLight(const Transform &light2world,
00039 const boost::shared_ptr< Texture<SWCSpectrum> > L, float gain,
00040 SampleableSphericalFunction *ssf);
00041 virtual ~PointLight();
00042 virtual bool IsDeltaLight() const { return true; }
00043 virtual bool IsEnvironmental() const { return false; }
00044 virtual SWCSpectrum Power(const TsPack *tspack, const Scene *) const;
00045 virtual SWCSpectrum Sample_L(const TsPack *tspack, const Point &P, float u1, float u2, float u3,
00046 Vector *wo, float *pdf, VisibilityTester *visibility) const;
00047 virtual SWCSpectrum Sample_L(const TsPack *tspack, const Scene *scene, float u1, float u2,
00048 float u3, float u4, Ray *ray, float *pdf) const;
00049 virtual float Pdf(const Point &, const Vector &) const;
00050 virtual float Pdf(const Point &p, const Normal &n,
00051 const Point &po, const Normal &ns) const;
00052 virtual bool Sample_L(const TsPack *tspack, const Scene *scene, float u1, float u2, float u3, BSDF **bsdf, float *pdf, SWCSpectrum *Le) const;
00053 virtual bool Sample_L(const TsPack *tspack, const Scene *scene, const Point &p, const Normal &n,
00054 float u1, float u2, float u3, BSDF **bsdf, float *pdf, float *pdfDirect,
00055 VisibilityTester *visibility, SWCSpectrum *Le) const;
00056 virtual SWCSpectrum Le(const TsPack *tspack, const Scene *scene, const Ray &r,
00057 const Normal &n, BSDF **bsdf, float *pdf, float *pdfDirect) const;
00058
00059 static Light *CreateLight(const Transform &light2world,
00060 const ParamSet ¶mSet, const TextureParams &tp);
00061 private:
00070 SWCSpectrum L(const TsPack *tspack, const Vector& w) const;
00071
00072 Point lightPos;
00073 bool flipZ;
00074 boost::shared_ptr< Texture<SWCSpectrum> > Lbase;
00075 DifferentialGeometry dummydg;
00076 float gain;
00077 SampleableSphericalFunction *func;
00078 };
00079
00080 }
00081