Triangle.h

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// -*- C++ -*-

#if !defined(__geom_Triangle_h__)
#define __geom_Triangle_h__

// If we are debugging the whole geom namespace.
#if defined(DEBUG_geom) && !defined(DEBUG_Triangle)
#define DEBUG_Triangle
#endif

#ifdef DEBUG_Triangle
#ifndef DEBUG_Plane
#define DEBUG_Plane
#endif
#endif

#include "Plane.h"

BEGIN_NAMESPACE_GEOM


template<int N, typename T = double>
class Triangle {
  //
  // Public types.
  //

public:

  typedef ads::FixedArray<N,T> Point;

  //
  // Data
  //

private:

  ads::FixedArray<3,Point> _vertices;

public:

  //--------------------------------------------------------------------------
  // @{

  Triangle() 
  {}

  Triangle(const Point& a, const Point& b, const Point& c) {
    _vertices[0] = a;
    _vertices[1] = b;
    _vertices[2] = c;
  }

  Triangle(const Triangle& other)
  {
    _vertices[0] = other._vertices[0];
    _vertices[1] = other._vertices[1];
    _vertices[2] = other._vertices[2];
  }

  const Triangle& 
  operator=(const Triangle& other);

  ~Triangle() 
  {}

  // @}
  //--------------------------------------------------------------------------
  // @{

  const Point&
  getVertex(const int n) const { 
    return _vertices[n]; 
  }

  // @}
  //--------------------------------------------------------------------------
  // @{

  void
  setVertex(const int n, const Point& x) const { 
    _vertices[n] = x; 
  }

  // @}
  //--------------------------------------------------------------------------
  // @{

  Triangle& 
  operator+=(const Point& p);

  Triangle& 
  operator-=(const Point& p);

  // @}
};

//
// Mathematical Functions.
//



template<typename T>
Plane<T> 
buildSupportingPlane(const Triangle<3,T>& triangle);


//
// File I/O operators.
//



template<int N, typename T>
std::istream& 
operator>>(std::istream& in, Triangle<N,T>& t);



template<int N, typename T>
std::ostream& 
operator<<(std::ostream& out, const Triangle<N,T>& t);


END_NAMESPACE_GEOM

#define __geom_Triangle_ipp__
#include "Triangle.ipp"
#undef __geom_Triangle_ipp__

#endif

---