#ifndef __SIMPLETRI_H
#define __SIMPLETRI_H

#include <iostream>
#include "SimpleVec.h"


struct SimpleTri 
{
	SimpleTri() {};
	SimpleTri(const SimpleVec &a, const SimpleVec &b, const SimpleVec &c);

	void Init(const SimpleVec &a, const SimpleVec &b, const SimpleVec &c);

	SimpleVec GetNormal() const;

	SimpleVec GetWorldCenter() const;

	float GetSpatialAngle(const SimpleVec &point) const;

	float GetArea() const;
	
	  
	friend std::ostream& operator<< (std::ostream &s, const SimpleTri &A);
	friend std::istream& operator>> (std::istream &s, SimpleTri &A);


	///////////////////

	/// the triangle vertices
	SimpleVec mVertices[3];
};


// Overload << operator for C++-style output
inline std::ostream&
operator<< (std::ostream &s, const SimpleTri &A)
{
  return s << "(" << A.mVertices[0] << ", " << A.mVertices[1] << ", " << A.mVertices[2] << ")";
}

// Overload >> operator for C++-style input
inline std::istream&
operator>> (std::istream &s, SimpleTri &A)
{
  char a;
  // read "(x, y, z)"
  return s >> a >> A.mVertices[0] >> a >> A.mVertices[1] >> a >> A.mVertices[2] >> a;
}


#endif