// Created on: 1995-10-21
// Created by: Andre LIEUTIER
// Copyright (c) 1995-1999 Matra Datavision
// Copyright (c) 1999-2014 OPEN CASCADE SAS
//
// This file is part of Open CASCADE Technology software library.
//
// This library is free software; you can redistribute it and/or modify it under
// the terms of the GNU Lesser General Public License version 2.1 as published
// by the Free Software Foundation, with special exception defined in the file
// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
// distribution for complete text of the license and disclaimer of any warranty.
//
// Alternatively, this file may be used under the terms of Open CASCADE
// commercial license or contractual agreement.

#include "gp_XY.hxx"
#include "gp_XYZ.hxx"

inline double Plate_Plate::Polm(const gp_XY& point2d,
                                const int    iu,
                                const int    iv,
                                const int    idu,
                                const int    idv) const
{
  if (idu > iu)
    return 0;
  if (idv > iv)
    return 0;
  double u = point2d.X();
  double v = point2d.Y();

  double value = 1;

  int degu = iu - idu;
  int i;
  for (i = 0; i < degu; i++)
    value *= u;
  for (i = iu; i > degu; i--)
    value *= i;

  int degv = iv - idv;
  for (i = 0; i < degv; i++)
    value *= v;
  for (i = iv; i > degv; i--)
    value *= i;

  // le produit par ddu[iu]*ddv[iv] n'est pas indispensable !! (il change
  // les valeurs claculles pour la partie coef polynomiaux de Sol
  // de telle facon que les methodes Evaluate et EvaluateDerivative donnent
  // en theorie les memes valeurs. Toutefois, il nous semble que ce produit
  // ameliore le conditionnmenet de la matrice
  return value * ddu[iu] * ddv[iv];
  // return value;
}

inline int& Plate_Plate::Deru(const int index) const
{
  return ((int*)deru)[index];
}

inline int& Plate_Plate::Derv(const int index) const
{
  return ((int*)derv)[index];
}

inline gp_XYZ& Plate_Plate::Solution(const int index) const
{
  return ((gp_XYZ*)solution)[index];
}

inline gp_XY& Plate_Plate::Points(const int index) const
{
  return ((gp_XY*)points)[index];
}