include/crbn/matter/matter.hpp

#ifndef __matter_hpp__
#define __matter_hpp__

#include <crbn/basic/vec3.hpp>
#include <crbn/basic/trihedron.hpp>

class Matter
{
 public:

  // ctor.
  Matter() : _ok          ( false ), 
             _is_specular ( false ),
             _index       ( 1.0f  ),
             _absortion   ( 1.0f  ) {}

  Matter(const bool& ok,
         const bool& is_specular = false, 
         const bool& index       = 1.0f,
         const bool& absortion   = 1.0f ) :
        _ok          ( ok          ),
        _is_specular ( is_specular ),
        _index       ( index       ),
        _absortion   ( absortion   ) {}

  // dtor.
  virtual ~Matter() {}

  bool is_ok       () { return _ok;          }
  bool is_specular () { return _is_specular; }

  virtual float specular() const = 0; // may disappear soon

  float index     () const { return _index;     }
  float absortion () const { return _absortion; }

  virtual float eval( trihedron& tri, vec3& in, vec3& out ) = 0;

  virtual int sample( trihedron& tri, vec3& in, int number, vec3* outs );

protected:
  bool  _ok;
  bool  _is_specular;
  float _index;
  float _absortion;
};

#endif // __matter_hpp__

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