DiffuseBSDF.h

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/**<!-------------------------------------------------------------------->
   @class  DiffuseBSDF
   @author Travis Fischer (fisch0920@gmail.com)
   @author Matthew Jacobs (jacobs.mh@gmail.com)
   @date   Fall 2008
   
   @brief
      Ideal diffuse BSDF (lambertian) defined at a single point on a 
   surface in 3-space
   
   @param
      kd - SpectralSampleSet which scales / attenuates the overall reflectance 
   of the material (diffuse albedo)
   <!-------------------------------------------------------------------->**/

#ifndef DIFFUSE_BSDF_H_
#define DIFFUSE_BSDF_H_

#include <materials/BSDF.h>

class DiffuseBSDF : public BSDF {
   public:
      ///@name Constructors
      //@{-----------------------------------------------------------------
      
      inline explicit DiffuseBSDF(SurfacePoint &pt, Material *parent = NULL)
         : BSDF(pt, parent)
      { }
      
      virtual ~DiffuseBSDF()
      { }
      
      
      //@}-----------------------------------------------------------------
      ///@name Main usage interface
      //@{-----------------------------------------------------------------
      
      virtual Event sample();
      
      virtual real_t getPdf(const Event &event);
      
      virtual SpectralSampleSet getBSDF(const Vector3 &wi, const Vector3 &wo);
      
      
      //@}-----------------------------------------------------------------
};

#endif // DIFFUSE_BSDF_H_