// Created on: 1995-02-23
// Created by: Remi LEQUETTE
// 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.

// **************************************************************
// Modif : DFO 05/11/96

#include <Draw.hxx>
#include <Draw_Appli.hxx>
#include <Draw_Display.hxx>
#include <Draw_Drawable3D.hxx>
#include <Draw_Grid.hxx>
#include <Draw_ProgressIndicator.hxx>
#include <Draw_Text2D.hxx>
#include <Draw_Text3D.hxx>
#include <Standard_Stream.hxx>
#include <TCollection_AsciiString.hxx>

#include <stdio.h>
#ifdef _WIN32
extern Draw_Viewer dout;
extern Standard_Boolean Draw_Batch;
#endif

extern Standard_Boolean Draw_BlackBackGround;


#define DEFROTATE (5 * M_PI/ 180.)
#define DEFMAGNIFY 1.1
#define DEFPANNING 0.1
#define DEFFOCAL 1.1
#define DEFFRAME 10
#define DEFGRIDSTEP 100.0
static Standard_Real steprot = DEFROTATE;
static Standard_Real steppan = DEFPANNING;
static Standard_Real stepmagnify = DEFMAGNIFY;
static Standard_Real stepfocal = DEFFOCAL;
static Standard_Real frame = DEFFRAME;
static Standard_Real DefaultGridStep = DEFGRIDSTEP ;

#define FONTLENGTH
static char Draw_fontname[FONTLENGTH]="Helvetica";
static char Draw_fontsize[FONTLENGTH]="150";
static char Draw_fontnamedefault[FONTLENGTH]="Helvetica";
static char Draw_fontsizedefault[FONTLENGTH]="150";

// *******************************************************************
// Graphic commands
// *******************************************************************

static Standard_Integer ViewId(const Standard_CString a)
{
  Standard_Integer id = Draw::Atoi(a);
  if ((id < 0) || (id >= MAXVIEW)) {
    std::cout << "Incorrect view-id, must be in 0.."<<MAXVIEW-1<<std::endl;
    return -1;
  }
  if (!dout.HasView(id)) {
    std::cout <<"View "<<id<<" does not exist."<<std::endl;
    return -1;
  }
  return id;
}

static void SetTitle(const Standard_Integer id)
{
  if (dout.HasView(id)) {
    char title[255];
    Sprintf(title,"%d : %s - Zoom %f",id,dout.GetType(id),dout.Zoom(id));
    dout.SetTitle(id,title);
  }
}

//=======================================================================
//function : zoom
//purpose  :
//=======================================================================

static Standard_Integer zoom(Draw_Interpretor& , Standard_Integer n, const char** a)
{
  // one argument -> All Views
  // two argument -> First is the view
  Standard_Boolean z2d = !strcasecmp(a[0],"2dzoom");
  if (n == 2) {
    Standard_Real z = Draw::Atof(a[1]);
    for (Standard_Integer id = 0; id < MAXVIEW; id++) {
      if (dout.HasView(id)) {
	if ((z2d && !dout.Is3D(id)) || (!z2d && dout.Is3D(id))) {
	  dout.SetZoom(id,z);
	  SetTitle(id);
	  dout.RepaintView(id);
	}
      }
    }
    return 0;
  }
  else if (n >= 3) {
    Standard_Integer id = ViewId(a[1]);
    if (id < 0) return 1;
    Standard_Real z = Draw::Atof(a[2]);
    dout.SetZoom(id,z);
    dout.RepaintView(id);
    SetTitle(id);
    return 0;
  }
  else
    return 1;
}

//=======================================================================
//function : wzoom
//purpose  :
//=======================================================================

static Standard_Integer wzoom(Draw_Interpretor& di, Standard_Integer argc, const char** argv)
{
  Standard_Integer id,X,Y,W,H,X1,Y1,X2 = 0,Y2 = 0,b;
  Standard_Real dX1,dY1,dX2,dY2,zx,zy;
  if(argc != 1 && argc != 6)
  {
    di<<"Usage : " << argv[0] << " [view-id X1 Y1 X2 Y2]\n";
    return 1;
  }
  if(argc == 1)
  {
    di << "Pick first corner\n";
    dout.Select(id,X1,Y1,b);

    gp_Trsf T;
    gp_Pnt P0(0,0,0);
    dout.GetTrsf(id,T);
    T.Invert();
    P0.Transform(T);
    Standard_Real z = dout.Zoom(id);

    dX1=X1;       dY1=Y1;
    dX1-=P0.X();  dY1-=P0.Y();
    dX1/=z;       dY1/=z;

    if (b != 1) return 0;
    if (id < 0) return 0;
    Draw_Display d = dout.MakeDisplay(id);
    d.SetColor(Draw_blanc);
    d.SetMode(10);
    Standard_Real dOX2 = dX1;
    Standard_Real dOY2 = dY1;
    d.Draw(gp_Pnt2d(dX1,dY1),gp_Pnt2d(dX1,dOY2));
    d.Draw(gp_Pnt2d(dX1,dOY2),gp_Pnt2d(dOX2,dOY2));
    d.Draw(gp_Pnt2d(dOX2,dOY2),gp_Pnt2d(dOX2,dY1));
    d.Draw(gp_Pnt2d(dOX2,dY1),gp_Pnt2d(dX1,dY1));
    d.Flush();
    dout.GetPosSize(id,X,Y,W,H);
    di << "Pick second corner\n";
    b = 0;
    while (b == 0) {
      dout.Select(id,X2,Y2,b,Standard_False);
      dX2=X2;          dY2=Y2;
      dX2-=P0.X();     dY2-=P0.Y();
      dX2/=z;          dY2/=z;

      d.Draw(gp_Pnt2d(dX1,dY1),gp_Pnt2d(dX1,dOY2));
      d.Draw(gp_Pnt2d(dX1,dOY2),gp_Pnt2d(dOX2,dOY2));
      d.Draw(gp_Pnt2d(dOX2,dOY2),gp_Pnt2d(dOX2,dY1));
      d.Draw(gp_Pnt2d(dOX2,dY1),gp_Pnt2d(dX1,dY1));
      d.Draw(gp_Pnt2d(dX1,dY1),gp_Pnt2d(dX1,dY2));
      d.Draw(gp_Pnt2d(dX1,dY2),gp_Pnt2d(dX2,dY2));
      d.Draw(gp_Pnt2d(dX2,dY2),gp_Pnt2d(dX2,dY1));
      d.Draw(gp_Pnt2d(dX2,dY1),gp_Pnt2d(dX1,dY1));
      d.Flush();
      dOX2 = dX2;
      dOY2 = dY2;
    }
    d.Draw(gp_Pnt2d(dX1,dY1),gp_Pnt2d(dX1,dOY2));
    d.Draw(gp_Pnt2d(dX1,dOY2),gp_Pnt2d(dOX2,dOY2));
    d.Draw(gp_Pnt2d(dOX2,dOY2),gp_Pnt2d(dOX2,dY1));
    d.Draw(gp_Pnt2d(dOX2,dY1),gp_Pnt2d(dX1,dY1));
    d.Flush();
    if (b != 1) return 0;
    d.SetMode(0);
  }
  else
  {
    id = atoi(argv[1]); 
    if ((id < 0) || (id >= MAXVIEW)) 
    {
      std::cout << "Incorrect view-id, must be in 0.."<<MAXVIEW-1<<std::endl;
      return 1;
    }
    if (!dout.HasView(id))
    {
      std::cout <<"View "<<id<<" does not exist."<<std::endl;
      return 1;
    }
    X1 = atoi (argv [2]);
    Y1 = atoi (argv [3]);
    X2 = atoi (argv [4]);
    Y2 = atoi (argv [5]);

    dout.GetPosSize(id,X,Y,W,H);
  }

  if ((X1 == X2) || (Y1 == Y2)) return 0;
  zx = (Standard_Real) Abs(X2-X1) / (Standard_Real) W;
  zy = (Standard_Real) Abs(Y2-Y1) / (Standard_Real) H;
  if (zy > zx) zx = zy;
  zx = 1/zx;
  if (X2 < X1) X1 = X2;
  if (Y2 > Y1) Y1 = Y2;
  X1 = (Standard_Integer ) (X1*zx);
  Y1 = (Standard_Integer ) (Y1*zx);
  dout.SetZoom(id,zx*dout.Zoom(id));
  dout.SetPan(id,-X1,-Y1);
  dout.RepaintView(id);
  SetTitle(id);
  return 0;
}

//=======================================================================
//function : wclick
//purpose  :
//=======================================================================

static Standard_Integer wclick(Draw_Interpretor& di, Standard_Integer, const char**)
{
  Standard_Integer id1,X1,Y1,b;
  dout.Flush();
  di << "Just click.\n";
  dout.Select(id1,X1,Y1,b);
  return 0;
}

//=======================================================================
//function : view
//purpose  :
//=======================================================================

static Standard_Integer view(Draw_Interpretor& di, Standard_Integer n, const char** a)
{
  if (Draw_Batch) return 1;

  if ((n >= 3) && (n != 4)) {
    Standard_Integer id = Draw::Atoi(a[1]);
    if ((id < 0) || (id >= MAXVIEW)) {
      di <<"View-id must be in 0.."<<MAXVIEW-1<<"\n";
      return 1;
    }
    Standard_Integer X = 0;
    Standard_Integer Y = 0;
    Standard_Integer W = 500;
    Standard_Integer H = 500;
    // if view exist, get old values
    if (dout.HasView(id))
      dout.GetPosSize(id,X,Y,W,H);
    if (n >= 4)
      X = Draw::Atoi(a[3]);
    if (n >= 5)
      Y = Draw::Atoi(a[4]);
    if (n >= 6)
      W = Draw::Atoi(a[5]);
    if (n >= 7)
      H = Draw::Atoi(a[6]);
    dout.MakeView(id,a[2],X,Y,W,H);
    if (!dout.HasView(id)) {
      di << "View creation failed\n";
      return 1;
    }
    SetTitle(id);
    dout.DisplayView(id);
    return 0;
  }
  else if (n == 4) {
    // create a view on a given window
    Standard_Integer id = Draw::Atoi(a[1]);
    if ((id < 0) || (id >= MAXVIEW)) {
      di <<"View-id must be in 0.."<<MAXVIEW-1<<"\n";
      return 1;
    }
    dout.MakeView(id,a[2],a[3]);
    if (!dout.HasView(id)) {
      di << "View creation failed\n";
      return 1;
    }
    SetTitle(id);
    dout.DisplayView(id);
    return 0;
  }
  else
    return 1;
}

//=======================================================================
//function : delview
//purpose  :
//=======================================================================

static Standard_Integer delview(Draw_Interpretor& , Standard_Integer n, const char** a)
{
  if (n == 1) {
    for (Standard_Integer id = 0; id < MAXVIEW; id++)
      dout.DeleteView(id);
    return 0;
  }
  else if (n >= 2) {
    Standard_Integer id = ViewId(a[1]);
    if (id < 0) return 1;
    dout.DeleteView(id);
    return 0;
  }
  else
    return 1;
}

//=======================================================================
//function : fit
//purpose  :
//=======================================================================

static Standard_Integer fit(Draw_Interpretor& , Standard_Integer n, const char** a)
{
  Standard_Boolean f2d = !strcasecmp(a[0],"2dfit");
  if (n == 1) {
    Standard_Real zoom = RealLast();
    Standard_Integer id;
    for ( id = 0; id < MAXVIEW; id++) {
      if (dout.HasView(id)) {
	if ((f2d && !dout.Is3D(id)) || (!f2d && dout.Is3D(id))) {
//	  dout.FitView(id,frame);
	  dout.FitView(id,(Standard_Integer ) frame);
	  if (dout.Zoom(id) < zoom) zoom = dout.Zoom(id);
	}
      }
    }
    for (id = 0; id < MAXVIEW; id++) {
      if (dout.HasView(id)) {
	if ((f2d && !dout.Is3D(id)) || (!f2d && dout.Is3D(id))) {
	  dout.SetZoom(id,zoom);
	  dout.RepaintView(id);
	  SetTitle(id);
	}
      }
    }
    return 0;
  }
  else if (n >= 2) {
    Standard_Integer id = ViewId(a[1]);
    if (id < 0) return 1;
//    dout.FitView(id,frame);
    dout.FitView(id,(Standard_Integer ) frame);
    dout.RepaintView(id);
    SetTitle(id);
    return 0;
  }
  else
    return 1;
}

//=======================================================================
//function : focal
//purpose  :
//=======================================================================

static Standard_Integer focal(Draw_Interpretor& , Standard_Integer n, const char** a)
{
  Standard_Integer start = 0;
  Standard_Integer end = MAXVIEW-1;
  if (n >= 2) {
    Standard_Integer anid = ViewId(a[1]);
    if (anid < 0) return 1;
    start = end = anid;
  }
  Standard_Real df = 1.;
  if (!strcasecmp(a[0],"fu"))
    df = stepfocal;
  if (!strcasecmp(a[0],"fd"))
    df = 1./stepfocal;

  for (Standard_Integer id = start; id <= end; id++) {
    if (!strcasecmp(dout.GetType(id),"PERS")) {
      dout.SetFocal(id,dout.Focal(id) * df);
      dout.RepaintView(id);
    }
  }
  return 0;
}

//=======================================================================
//function : setfocal
//purpose  :
//=======================================================================

static Standard_Integer setfocal(Draw_Interpretor& di, Standard_Integer n, const char** a)
{
  if (n == 1) {
    for (Standard_Integer id = 0; id < MAXVIEW; id++) {
      if (!strcasecmp(dout.GetType(id),"PERS"))
	di << "Focal view "<<id<<" is "<<dout.Focal(id)<<"\n";
    }
  }
  else {
    Standard_Real f = Draw::Atof(a[1]);
    for (Standard_Integer id = 0; id < MAXVIEW; id++) {
      if (!strcasecmp(dout.GetType(id),"PERS"))
	dout.SetFocal(id,f);
    }
    dout.RepaintAll();
  }
  return 0;
}

//=======================================================================
//function : magnify
//purpose  :
//=======================================================================

//static Standard_Integer magnify(Draw_Interpretor& di, Standard_Integer n, const char** a)
static Standard_Integer magnify(Draw_Interpretor& , Standard_Integer n, const char** a)
{
  Standard_Integer start = 0;
  Standard_Integer end = MAXVIEW-1;
  if (n >= 2) {
    Standard_Integer anid = ViewId(a[1]);
    if (anid < 0) return 1;
    start = end = anid;
  }
  Standard_Boolean v2d = (a[0][0] == '2');   // 2dmu, 2dmd
  const char* com = a[0];
  if (v2d) com += 2;
  Standard_Real dz = 1.;
  if (!strcasecmp(com,"mu"))      // mu, 2dmu
    dz = stepmagnify;
  else                            // md, 2dmd
    dz = 1/stepmagnify;

  for (Standard_Integer id = start; id <= end; id++) {
    if (dout.HasView(id)) {
      if ((v2d && !dout.Is3D(id)) || (!v2d && dout.Is3D(id))) {
	dout.SetZoom(id,dout.Zoom(id) * dz);
	SetTitle(id);
	dout.RepaintView(id);
      }
    }
  }
  return 0;
}

Standard_EXPORT Standard_Integer Draw_magnify(Draw_Interpretor& di, Standard_Integer n, const char** a)
{
  return magnify(di,n,a);
}

//=======================================================================
//function : rotate
//purpose  :
//=======================================================================

static Standard_Integer rotate(Draw_Interpretor& , Standard_Integer n, const char** a)
{
  Standard_Integer start = 0;
  Standard_Integer end = MAXVIEW-1;
  if (n >= 2) {
    Standard_Integer anid = ViewId(a[1]);
    if (anid < 0) return 1;
    start = end = anid;
  }

  gp_Dir2d D;
  Standard_Real ang=0;
  if (!strcasecmp(a[0],"u")) {
    D.SetCoord(1.,0.);
    ang = -steprot;
  }
  if (!strcasecmp(a[0],"d")) {
    D.SetCoord(1.,0.);
    ang = steprot;
  }
  if (!strcasecmp(a[0],"l")) {
    D.SetCoord(0.,1.);
    ang = -steprot;
  }
  if (!strcasecmp(a[0],"r")) {
    D.SetCoord(0.,1.);
    ang = steprot;
  }

  for (Standard_Integer id = start; id <= end; id++) {
    if ((!strcasecmp(dout.GetType(id),"AXON")) ||
	(!strcasecmp(dout.GetType(id),"PERS"))) {
      dout.RotateView(id,D,ang);
      dout.RepaintView(id);
    }
  }
  return 0;
}

//=======================================================================
//function : panning
//purpose  :
//=======================================================================

static Standard_Integer panning(Draw_Interpretor& , Standard_Integer n, const char** a)
{
  Standard_Integer start = 0;
  Standard_Integer end = MAXVIEW-1;
  if (n >= 2) {
    Standard_Integer anid = ViewId(a[1]);
    if (anid < 0) return 1;
    start = end = anid;
  }
  Standard_Integer DX = 0;
  Standard_Integer DY = 0;
  Standard_Integer X,Y,W,H;

  Standard_Boolean v2d = (a[0][0] == '2');     // pu2d, pd2d, pr2d, pl2d
  const char* com = a[0];
  if (v2d) com += 2;

  if (!strcasecmp(com,"pu"))    // pu , 2dpu
    DY = 1;
  if (!strcasecmp(com,"pd"))    // pd , 2dpd
    DY = -1;
  if (!strcasecmp(com,"pl"))    // pl , 2dpl
    DX = -1;
  if (!strcasecmp(com,"pr"))    // pr , 2dpr
    DX = 1;

  for (Standard_Integer id = start; id <= end; id++) {
    if (dout.HasView(id)) {
      if ((v2d && !dout.Is3D(id)) || (!v2d && dout.Is3D(id))) {
	dout.GetPosSize(id,X,Y,W,H);
//	dout.PanView(id,W * DX * steppan, H * DY * steppan);
	dout.PanView(id,(Standard_Integer )( W * DX * steppan),(Standard_Integer )( H * DY * steppan));
	dout.RepaintView(id);
      }
    }
  }
  return 0;
}

//=======================================================================
//function : ptv
//purpose  :
//=======================================================================

static Standard_Integer ptv(Draw_Interpretor& , Standard_Integer n, const char** a)
{
  Standard_Real X,Y,Z;
  Standard_Integer start = 0;
  Standard_Integer end = MAXVIEW-1;
  if (n < 4) return 1;
  if (n >= 5) {
    Standard_Integer anid = ViewId(a[1]);
    if (anid < 0) return 1;
    start = end = anid;
    X = Draw::Atof(a[2]);
    Y = Draw::Atof(a[3]);
    Z = Draw::Atof(a[4]);
  }
  else {
    X = Draw::Atof(a[1]);
    Y = Draw::Atof(a[2]);
    Z = Draw::Atof(a[3]);
  }

  for (Standard_Integer id = start; id <= end; id++) {
    gp_Trsf T;
    dout.GetTrsf(id,T);
    T.SetTranslationPart(gp_Vec(0,0,0));
    gp_Trsf T1;
    T1.SetTranslationPart(gp_Vec(-X,-Y,-Z));
    gp_Trsf aLocalTrsf(T*T1);
    dout.SetTrsf(id,aLocalTrsf);
//    dout.SetTrsf(id,T*T1);
    dout.RepaintView(id);
  }
  return 0;
}

//=======================================================================
//function : dptv
//purpose  :
//=======================================================================

static Standard_Integer dptv(Draw_Interpretor& , Standard_Integer n, const char** a)
{
  Standard_Real DX,DY,DZ;
  Standard_Integer start = 0;
  Standard_Integer end = MAXVIEW-1;
  if (n < 4) return 1;
  if (n >= 5) {
    Standard_Integer anid = ViewId(a[1]);
    if (anid < 0) return 1;
    start = end = anid;
    DX = Draw::Atof(a[2]);
    DY = Draw::Atof(a[3]);
    DZ = Draw::Atof(a[4]);
  }
  else {
    DX = Draw::Atof(a[1]);
    DY = Draw::Atof(a[2]);
    DZ = Draw::Atof(a[3]);
  }

  for (Standard_Integer id = start; id <= end; id++) {
    gp_Trsf T;
    dout.GetTrsf(id,T);
    gp_Trsf T1;
    T1.SetTranslationPart(gp_Vec(-DX,-DY,-DZ));
    gp_Trsf M = T*T1;
    dout.SetTrsf(id,M);
    dout.RepaintView(id);
  }
  return 0;
}


//=======================================================================
//function : color
//purpose  :
//=======================================================================

static Standard_Integer color(Draw_Interpretor& di, Standard_Integer n, const char** a)
{
  if (n < 3) {
    Draw_BlackBackGround = !Draw_BlackBackGround;
  }
  else if (!dout.DefineColor(Draw::Atoi(a[1]),a[2])) {
    di << "Could not allocate color "<<a[2]<<"\n";
    return 1;
  }
  return 0;
}



//=======================================================================
//function : hardcopy
//purpose  : hardcopy                  --> hardcopy of view 1
//                                                  in file a4.ps
//                                                  in format a4
//           hardcopy name view        --> hardcopy of view <view>
//                                                  in file <name>
//                                                  in format a4
//           hardcopy name view format --> hardcopy of view <view>
//                                                  in file <name>
//                                                  in format <a4,a3,a2,a1,a0>
//=======================================================================

static Standard_Integer hardcopy(Draw_Interpretor& ,
				 Standard_Integer n, const char** a)
{
  // Inch = 25.40001969 mm.
  // 28.4 pixels / mm.
  // format par default papier a4 210 297 mm avec marge de 3 mm.

  Standard_Real rap = 28.4;
  Standard_Real cad = 3;
  Standard_Real dx  = 210;
  Standard_Real dy  = 210 * Sqrt(2.);

  Standard_Integer iview = 1;
  const char* file = "a4.ps";
  if (n >= 2) {
    file = a[1];
    if (n >= 3) {
      iview = ViewId(a[2]);
      if (iview < 0) return 1;
      if (n >= 4) {
        if      (!strcmp(a[3],"a7")) {
          cad = cad / (2 * Sqrt(2));
          dx  = dx  / (2 * Sqrt(2));
          dy  = dy  / (2 * Sqrt(2));
        }
        else if (!strcmp(a[3],"a6")) {
          cad = cad / 2;
          dx  = dx  / 2;
          dy  = dy  / 2;
        }
        else if (!strcmp(a[3],"a5")) {
          cad = cad / Sqrt(2);
          dx  = dx  / Sqrt(2);
          dy  = dy  / Sqrt(2);
        }
        else if (!strcmp(a[3],"a4")) {
          // Do nothing
          //cad == cad;
          //dx  == dx;
          //dy  == dy;
        }
        else if (!strcmp(a[3],"a3")) {
          cad = cad * Sqrt(2);
          dx  = dx  * Sqrt(2);
          dy  = dy  * Sqrt(2);
        }
        else if (!strcmp(a[3],"a2")) {
          cad = cad * 2;
          dx  = dx  * 2;
          dy  = dy  * 2;
        }
        else if (!strcmp(a[3],"a1")) {
          cad = cad * 2 * Sqrt(2);
          dx  = dx  * 2 * Sqrt(2);
          dy  = dy  * 2 * Sqrt(2);
        }
        else if (!strcmp(a[3],"a0")) {
          cad = cad * 4;
          dx  = dx  * 4;
          dy  = dy  * 4;
        }
      }
    }
  }

  Standard_Integer pxmin = (Standard_Integer)(cad * rap);
  Standard_Integer pymin = (Standard_Integer)(cad * rap);
  Standard_Integer pxmax = (Standard_Integer)((dx - cad) * rap);
  Standard_Integer pymax = (Standard_Integer)((dy - cad) * rap);

  std::ofstream os(file);

  Standard_Integer vxmin,vymin,vxmax,vymax;
  if (dout.HasView(iview)) {
    dout.GetFrame(iview,vxmin,vymin,vxmax,vymax);
    Standard_Real kx = (Standard_Real) (pxmax - pxmin) / (vxmax - vxmin);
    Standard_Real ky = (Standard_Real) (pymax - pymin) / (vymax - vymin);
    Standard_Real k = Min(Abs(kx),Abs(ky));
    kx = (kx > 0) ? k : -k;
    ky = (ky > 0) ? k : -k;
    pxmax = (Standard_Integer )( pxmin + kx * (vxmax - vxmin));
    pymax = (Standard_Integer )( pymin + ky * (vymax - vymin));

    // si on veut choisir l'orientation : 90 rotate

    // ecriture du header

    os << "%!PS-Adobe-3.0 EPSF-3.0\n";
    os << "%%BoundingBox: " << pxmin << " " << pymin << " "
      << pxmax << " " << pymax << "\n";
    os << "%%Pages: 1\n";
    os << "%%DocumentFonts: "<<Draw_fontname<<"\n";
    os << "%%EndComments\n";

    os << "/"<<Draw_fontname<<" findfont\n"<<Draw_fontsize<<" scalefont\nsetfont\n";
    os << "/m {moveto} bind def\n";
    os << "/l {lineto} bind def\n";
    os <<".1 .1 scale\n";

    // draw the frame

    os <<"3 setlinewidth\n0 setgray\nnewpath\n";
    os << pxmin << " " << pymin << " m\n";
    os << pxmax << " " << pymin << " l\n";
    os << pxmax << " " << pymax << " l\n";
    os << pxmin << " " << pymax << " l\n";
    os << "closepath\nstroke\n";

    // frame the view

    os <<"newpath\n";
    os << pxmin << " " << pymin << " m\n";
    os << pxmax << " " << pymin << " l\n";
    os << pxmax << " " << pymax << " l\n";
    os << pxmin << " " << pymax << " l\n";
    os << "closepath\nclip\n";

    dout.PostScriptView(iview,
			vxmin,vymin,vxmax,vymax,
			pxmin,pymin,pxmax,pymax,os);
    os <<"showpage\n";
    os <<"%%EOF\n";
  }

  return 0;
}

static Standard_Integer dfont(Draw_Interpretor& di,
			      Standard_Integer n, const char** a)
{
  if        ( n == 1 ) {
    strcpy(Draw_fontname, Draw_fontnamedefault);
    strcpy(Draw_fontsize, Draw_fontsizedefault);
  } else if ( n == 2 ) {
    strcpy(Draw_fontname, a[1]);
  } else if ( n == 3 ) {
    strcpy(Draw_fontname, a[1]);
    strcpy(Draw_fontsize, a[2]);
  }
  di<<Draw_fontname<<" "<<Draw_fontsize<<"\n";
  return 0;
} // dfont

//=======================================================================
//function : hcolor
//purpose  :
//=======================================================================

static Standard_Integer hcolor(Draw_Interpretor& di, Standard_Integer n, const char** a)
{
  if (n < 4) {
    di << "code de couleur (Draw.cxx) : \n" ;
    di << "0 = White,\t 1 = Red,\t 2 = Green,\t 3 = Blue\n" ;
    di << "4 = Cyan,\t 5 = Gold,\t 6 = Magenta,\t 7 = Maroon"  << "\n" ;
    di << "8 = Orange,\t 9 = Pink,\t 10 = Salmon,\t 11 = Violet\n" ;
    di << "12 = Yellow,\t 13 = Khaki,\t 14 = Coral\n" ;
    di << "1 <= width <= 11,  0 (noir)  <= gray <= 1 (blanc)\n" ;
  } else {
    dout.PostColor(Draw::Atoi(a[1]),Draw::Atoi(a[2]),Draw::Atof(a[3]));
  }
  return 0;
}

//=======================================================================
//function : xwd
//purpose  : xwd file from a view
//=======================================================================

extern void Draw_RepaintNowIfNecessary();

static Standard_Integer xwd(Draw_Interpretor& , Standard_Integer n, const char** a)
{
  if (n < 2) return 1;

  // enforce repaint if necessary
  Draw_RepaintNowIfNecessary();

  Standard_Integer id = 1;
  const char* file = a[1];
  if (n > 2) {
    id  = Draw::Atoi(a[1]);
    file = a[2];
  }
  if (!dout.SaveView(id,file))
    return 1;

  return 0;
}

//=======================================================================
//function : grid
//purpose  : Creation/Suppression d'une grille.
//=======================================================================

static Standard_Integer grid (Draw_Interpretor& , Standard_Integer NbArg, const char **Arg)
{
  Standard_Real StepX, StepY, StepZ ;

  switch (NbArg) {
    case 1 :
      StepX = DefaultGridStep ;
      StepY = DefaultGridStep ;
      StepZ = DefaultGridStep ;
      break ;
    case 2 :
      StepX = Abs (Draw::Atof (Arg[1])) ;
      StepY = Abs (Draw::Atof (Arg[1])) ;
      StepZ = Abs (Draw::Atof (Arg[1])) ;
      break ;
    case 3 :
      StepX = Abs (Draw::Atof (Arg[1])) ;
      StepY = Abs (Draw::Atof (Arg[2])) ;
      StepZ = Abs (Draw::Atof (Arg[2])) ;
      break ;
    case 4 :
      StepX = Abs (Draw::Atof (Arg[1])) ;
      StepY = Abs (Draw::Atof (Arg[2])) ;
      StepZ = Abs (Draw::Atof (Arg[3])) ;
      break ;
    default :
      return 1 ;
  }

#ifdef HPUX
  const char *temp = "grid";
#else
  char temp1[] = "grid";
  const char *temp = temp1;
#endif
  Handle (Draw_Grid) Grille = Handle(Draw_Grid)::DownCast (Draw::Get(temp)) ;

  Grille->Steps (StepX, StepY, StepZ) ;
  dout.RepaintAll () ;

  return 0 ;
}

//=======================================================================
//function : dflush
//purpose  :
//=======================================================================

static Standard_Integer dflush (Draw_Interpretor& , Standard_Integer, const char **)
{
  dout.Flush();
  return 0;
}

//=======================================================================
//function : dtext
//purpose  :
//=======================================================================

static Standard_Integer dtext(Draw_Interpretor& di, Standard_Integer n, const char** a)
{
  gp_Pnt P;
  Standard_Boolean is3d;
  if (n == 2) {
    Standard_Integer id,X,Y,b;
    di << "Pick position with button 1, other button escape\n";
    dout.Select(id,X,Y,b);
    if (b != 1)
      return 0;
    Standard_Real z = dout.Zoom(id);
    P.SetCoord((Standard_Real)X /z,(Standard_Real)Y /z,0);
    gp_Trsf T;
    dout.GetTrsf(id,T);
    T.Invert();
    P.Transform(T);
    is3d = dout.Is3D(id);
  }
  else if (n >= 4) {
    is3d = n > 4;
    P.SetCoord(Draw::Atof(a[1]),Draw::Atof(a[2]),is3d ? Draw::Atof(a[3]) : 0);
  }
  else
    return 0;

  if (is3d) {
    Handle(Draw_Text3D) D = new Draw_Text3D(P,a[n-1],Draw_vert);
    dout << D;
  }
  else {
    Handle(Draw_Text2D) D = new Draw_Text2D(gp_Pnt2d(P.X(),P.Y()),
					    a[n-1],Draw_vert);
    dout << D;
  }
  return 0;
}

void Draw::GraphicCommands(Draw_Interpretor& theCommands)
{
  static Standard_Boolean Done = Standard_False;
  if (Done) return;
  Done = Standard_True;

  const char* g =  "DRAW Graphic Commands";
  theCommands.Add("wclick","wait for a mouse click",
		  __FILE__,wclick,g);
  theCommands.Add("zoom","zoom [view-id] z, or zoom z for all 3d views",
		  __FILE__,zoom,g);
  theCommands.Add("2dzoom","2dzoom [view-id] z, or zoom2d z for all 2d views",
		  __FILE__,zoom,g);
  theCommands.Add("wzoom","wzoom [view-id X1 Y1 X2 Y2]\n"
      "- fits the contents of a given rectangle into a view window.\n"
      "- The view window and rectangle corners are specified through the arguments\n"
      "- or selected interactively by the user if no arguments are given",
      __FILE__,wzoom,g);
  theCommands.Add("view","view view-id type X(0) Y(0) W(500) H(500)",
		  __FILE__,view,g);
  theCommands.Add("delete","delete [view-id]",
		  __FILE__,delview,g);
  theCommands.Add("fit","fit [view-id]",
		  __FILE__,fit,g);
  theCommands.Add("2dfit","2dfit [view-id]",
		  __FILE__,fit,g);
  theCommands.Add("fu","fu [view-id], focal up",
		  __FILE__,focal,g);
  theCommands.Add("fd","fd [view-id], focal down",
		  __FILE__,focal,g);
  theCommands.Add("focal","focal [f]",
		  __FILE__,setfocal,g);
  theCommands.Add("mu","mu [view-id], magnify up",
		  __FILE__,magnify,g);
  theCommands.Add("2dmu","2dmu [view-id], magnify up",
		  __FILE__,magnify,g);
  theCommands.Add("md","md [view-id], magnify down",
		  __FILE__,magnify,g);
  theCommands.Add("2dmd","2dmd [view-id], magnify down",
		  __FILE__,magnify,g);
  theCommands.Add("u","u [view-id], rotate up",
		  __FILE__,rotate,g);
  theCommands.Add("d","d [view-id], rotate down",
		  __FILE__,rotate,g);
  theCommands.Add("l","l [view-id], rotate left",__FILE__,rotate,g);
  theCommands.Add("r","r [view-id], rotate right",__FILE__,rotate,g);
  theCommands.Add("pu","pu [view-id], panning up",__FILE__,panning,g);
  theCommands.Add("pd","pd [view-id], panning down",__FILE__,panning,g);
  theCommands.Add("pl","pl [view-id], panning left",__FILE__,panning,g);
  theCommands.Add("pr","pr [view-id], panning right",__FILE__,panning,g);
  theCommands.Add("2dpu","2dpu [view-id], panning up",__FILE__,panning,g);
  theCommands.Add("2dpd","2dpd [view-id], panning down",__FILE__,panning,g);
  theCommands.Add("2dpl","2dpl [view-id], panning left",__FILE__,panning,g);
  theCommands.Add("2dpr","2dpr [view-id], panning right",__FILE__,panning,g);
  theCommands.Add("ptv","ptv [view-id], X , Y , Z",
		  __FILE__,ptv,g);
  theCommands.Add("dptv","dptv [view-id], dX , dY , dZ",
		  __FILE__,dptv,g);
  theCommands.Add("color","color i colorname, define color i",
		  __FILE__,color,g);
  theCommands.Add("hardcopy","hardcopy [file = a4.ps] [view-id = 1] [format = a4]", __FILE__,hardcopy,g);
  theCommands.Add("xwd","xwd [id = 1] <filename>.{png|bmp|jpg|gif}\n\t\t: Dump contents of viewer window to PNG, BMP, JPEG or GIF file",
		  __FILE__,xwd,g);
  theCommands.Add("hcolor","hcolor icol width gray (< 1, 0 black)",
		  __FILE__,hcolor,g);
  theCommands.Add("grid", "grid [stepX(100) [stepY [stepZ]]] / 0",
		  __FILE__,grid, g);
  theCommands.Add("dflush","dflush, flush the viewer",
		  __FILE__,dflush,g);
  theCommands.Add("dtext","dtext [x y [z]] string",
  		  __FILE__,dtext,g);
  theCommands.Add("dfont","dfont [name size] : set name and size of Draw font, or reset to default",
  		  __FILE__,dfont,g);
}