//----------------------------------------------------------------------------
// William Baxter III's Ray Tracer
//
//     Project for Comp 238, Raster Graphics
//     University of North Carolina at Chapel Hill
//     
// $Id:$
//----------------------------------------------------------------------------

#ifndef WB3TRACINGSHADER_H
#define WB3TRACINGSHADER_H

//----------------------------------------------------------------------------

#include "wb3Shader.hpp"
#include "wb3Artifact.hpp"
#include "wb3Scene.hpp"

// The Tracing shader does classic raytracing with reflections and
// refractions.


class wb3TracingShader : public wb3Shader
{
public:

  wb3TracingShader();
  ~wb3TracingShader();

  virtual void Shade(const wb3Scene* scene,
                     const wb3Artifact* from,
                     const wb3Artifact* hit,
                     const Ray3f& r, const Vec3f &isect, 
                     Vec3f& color, Vec3f& attenuation, int hits) const;

  void SetCutoff(float cutoff);
  float GetCutoff(void) const; 
    

protected:
  float m_fCutoffAtten;
};
//----------------------------------------------------------------------------
inline void wb3TracingShader::SetCutoff(float cutoff)
{
  m_fCutoffAtten = cutoff;
}
//----------------------------------------------------------------------------
inline float wb3TracingShader::GetCutoff(void) const 
{
  return m_fCutoffAtten;
}

//----------------------------------------------------------------------------
#endif