// 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 <DrawTrSurf_BezierSurface.hxx>

#include <Draw_Color.hxx>
#include <Draw_Display.hxx>
#include <DrawTrSurf.hxx>
#include <DrawTrSurf_BezierCurve.hxx>
#include <DrawTrSurf_Params.hxx>
#include <Geom_BezierSurface.hxx>
#include <GeomTools_SurfaceSet.hxx>
#include <gp_Pnt2d.hxx>
#include <TColgp_Array2OfPnt.hxx>
#include <TColStd_Array1OfReal.hxx>

IMPLEMENT_STANDARD_RTTIEXT(DrawTrSurf_BezierSurface, DrawTrSurf_Surface)

DrawTrSurf_BezierSurface::DrawTrSurf_BezierSurface (const Handle(Geom_BezierSurface)& S)
: DrawTrSurf_Surface (S, 1, 1, Draw_jaune, Draw_bleu, 30, 0.05, 0)
{
  drawPoles = Standard_True;
  polesLook = Draw_rouge;
}

DrawTrSurf_BezierSurface::DrawTrSurf_BezierSurface (const Handle(Geom_BezierSurface)& S,
                                                    const Standard_Integer NbUIsos, const Standard_Integer NbVIsos,
                                                    const Draw_Color& BoundsColor, const Draw_Color& IsosColor,
                                                    const Draw_Color& PolesColor, const Standard_Boolean ShowPoles,
                                                    const Standard_Integer Discret,const Standard_Real Deflection,
                                                    const Standard_Integer DrawMode)
: DrawTrSurf_Surface (S, NbUIsos, NbVIsos, BoundsColor, IsosColor, 
  Discret, Deflection, DrawMode)
{
  drawPoles = ShowPoles;
  polesLook = PolesColor;
}

void DrawTrSurf_BezierSurface::DrawOn (Draw_Display& dis) const
{
  Standard_Integer i,j;
  Handle(Geom_BezierSurface) S = Handle(Geom_BezierSurface)::DownCast(surf);
  if (drawPoles)
  {
    Standard_Integer NbUPoles = S->NbUPoles();
    Standard_Integer NbVPoles = S->NbVPoles();
    dis.SetColor(polesLook);
    TColgp_Array2OfPnt SPoles (1, NbUPoles, 1, NbVPoles);
    S->Poles (SPoles);
    for (j = 1; j <= NbVPoles; j++)
    {
      dis.MoveTo(SPoles(1, j));
      for (i = 2; i <= NbUPoles; i++)
      {
        dis.DrawTo(SPoles(i, j));
      }
    }
    for (i = 1; i <= NbUPoles; i++)
    {
      dis.MoveTo(SPoles(i, 1));
      for (j = 2; j <= NbVPoles; j++)
      {
        dis.DrawTo(SPoles(i, j));
      }
    }
  }
  DrawTrSurf_Surface::DrawOn (dis);
}

void DrawTrSurf_BezierSurface::FindPole (const Standard_Real X, const Standard_Real Y, const Draw_Display& D,
                                         const Standard_Real XPrec, Standard_Integer& UIndex, Standard_Integer& VIndex) const
{
  Handle(Geom_BezierSurface) bs = Handle(Geom_BezierSurface)::DownCast(surf);
  gp_Pnt2d p1(X/D.Zoom(),Y/D.Zoom());
  Standard_Real Prec = XPrec / D.Zoom();
  UIndex++;
  VIndex++;
  Standard_Integer NbUPoles = bs->NbUPoles();
  Standard_Integer NbVPoles = bs->NbVPoles();
  while (VIndex <= NbVPoles)
  {
    while (UIndex <= NbUPoles)
    {
      if (D.Project(bs->Pole(UIndex, VIndex)).Distance(p1) <= Prec)
      {
        return;
      }
      UIndex++;
    }
    UIndex = 1;
    VIndex++;
  }
  UIndex = VIndex = 0;
}

//=======================================================================
//function : Copy
//purpose  :
//=======================================================================
Handle(Draw_Drawable3D) DrawTrSurf_BezierSurface::Copy() const
{
  Handle(DrawTrSurf_BezierSurface) DS = new DrawTrSurf_BezierSurface
    (Handle(Geom_BezierSurface)::DownCast(surf->Copy()),
     nbUIsos,nbVIsos,
     boundsLook,isosLook,polesLook,drawPoles,
     GetDiscretisation(),GetDeflection(),GetDrawMode());
     
  return DS;
}

//=======================================================================
//function : Restore
//purpose  :
//=======================================================================
Handle(Draw_Drawable3D) DrawTrSurf_BezierSurface::Restore (Standard_IStream& theStream)
{
  const DrawTrSurf_Params& aParams = DrawTrSurf::Parameters();
  Handle(Geom_BezierSurface) aGeomSurface = Handle(Geom_BezierSurface)::DownCast (GeomTools_SurfaceSet::ReadSurface (theStream));
  Handle(DrawTrSurf_BezierSurface) aDrawSurface = new DrawTrSurf_BezierSurface (aGeomSurface,
                                                                                aParams.NbUIsos, aParams.NbVIsos,
                                                                                aParams.BoundsColor, aParams.IsosColor, aParams.PolesColor,
                                                                                aParams.IsShowPoles, aParams.Discret,
                                                                                aParams.Deflection, aParams.DrawMode);
  return aDrawSurface;
}