#ifndef __TETRAHEDRON3_H
#define __TETRAHEDRON3_H

#include "Triangle3.h"
#include "Vector3.h"

namespace GtpVisibilityPreprocessor {

class Tetrahedron3 
{
public:
  Vector3 mVertices[4];
  
  Tetrahedron3() {}
  
  Tetrahedron3(const Vector3 &a,
			   const Vector3 &b,
			   const Vector3 &c,
			   const Vector3 &d) 
  {
	  Init(a, b, c, d);
  }
  
  Tetrahedron3(const Triangle3 &t, const Vector3 &a)
  {
	  Init(t.mVertices[0], t.mVertices[1], t.mVertices[2], a);
  }

  void Init(const Vector3 &a,
			const Vector3 &b,
			const Vector3 &c,
			const Vector3 &d) 
  {
	  mVertices[0] = a;
	  mVertices[1] = b;
	  mVertices[2] = c;
	  mVertices[3] = c;
  }

  Triangle3 GetTriangle(const int i) const 
  {
	  switch(i)
	  {
	  case 0: 
		  return Triangle3(mVertices[0],  mVertices[1], mVertices[2]);
		  break;
	  case 1:
		  return Triangle3(mVertices[0],  mVertices[1], mVertices[3]);
		  break;
	  case 2:
		  return Triangle3(mVertices[1],  mVertices[2], mVertices[3]);
		  break;
	  case 3:
		  return Triangle3(mVertices[0],  mVertices[3], mVertices[2]);
		  break;
	  }
	  return Triangle3();
  }


  float GetArea() const;
  float GetVolume() const;
  bool Valid() const;

};

}

#endif