Vecteur3.h

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#ifndef Vecteur3_included
#define Vecteur3_included
#include <assert.h>
#include <TRUSTTab.h>
 
//  Attention: le constructeur par defaut n'initialise pas le vecteur !
class Vecteur3
{
public:
  Vecteur3() {};
  Vecteur3(const Vecteur3& w)
  {
    for (int i = 0; i < 3; i++)
      v[i] = w.v[i];
  }
  Vecteur3(double x, double y, double z)
  {
    v[0] = x;
    v[1] = y;
    v[2] = z;
  }
  void  set(double x, double y, double z)
  {
    v[0] = x;
    v[1] = y;
    v[2] = z;
  }
 
  void set(const DoubleTab& tab, int i)
  {
    assert(tab.line_size() == 3);
    assert(i >= 0 && i < tab.dimension_tot(0));
    const double *ptr = tab.addr() + i * 3;
    for (int j = 0; j < 3; j++)
      v[j] = ptr[j];
  }
  double length() const
  {
    return sqrt(v[0]*v[0]+v[1]*v[1]+v[2]*v[2]);
  };
  Vecteur3(const DoubleTab& tab, int i)
  {
    assert(tab.line_size() == 3);
    assert(i >= 0 && i < tab.dimension_tot(0));
    const double *ptr = tab.addr() + i * 3;
    for (int j = 0; j < 3; j++)
      v[j] = ptr[j];
  }
  Vecteur3(const ArrOfDouble& arr)
  {
    assert(arr.size_array() == 3);
    for (int i = 0; i < 3; i++)
      v[i] = arr[i];
  }
  Vecteur3& operator=(double x)
  {
    for (int i = 0; i < 3; i++)
      v[i] = x;
    return *this;
  }
  Vecteur3& operator*=(double x)
  {
    for (int i = 0; i < 3; i++)
      v[i] *= x;
    return *this;
  }
  Vecteur3& operator+=(const Vecteur3& x)
  {
    for (int i = 0; i < 3; i++)
      v[i] += x[i];
    return *this;
  }
 
  Vecteur3& operator=(const Vecteur3& w)
  {
    for (int i = 0; i < 3; i++)
      v[i] = w[i];
    return *this;
  }
  double               operator[](int i) const
  {
    assert(i>=0 && i<3);
    return v[i];
  }
  double&              operator[](int i)
  {
    assert(i>=0 && i<3);
    return v[i];
  }
  inline        double norme_Linfini();
  static inline void   produit_vectoriel(const Vecteur3& x, const Vecteur3& y, Vecteur3& resu);
  static inline double produit_scalaire(const Vecteur3& x, const Vecteur3& y);
  friend class Matrice33;
  friend Vecteur3 operator-(const Vecteur3&, const Vecteur3&);
protected:
  double v[3];
  void init()
  {
    for (int i = 0; i < 3; i++)
      v[i] = 0.;
  }
};
 
inline Vecteur3 operator-(const Vecteur3&, const Vecteur3&);
 
#endif