[occt.git] / src / DrawTrSurf / DrawTrSurf_Drawable.cxx

// Created on: 1991-07-16
// Created by: Christophe MARION
// Copyright (c) 1991-1999 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_Drawable.ixx>
#include <GCPnts_UniformDeflection.hxx>
#include <gp_Pnt.hxx>
#include <gp_Pnt2d.hxx>
#include <TColStd_Array1OfReal.hxx>
#include <GeomAdaptor_Curve.hxx>
#include <Geom_BezierCurve.hxx>
#include <Geom_BSplineCurve.hxx>
#include <Precision.hxx>


//=======================================================================
//function : DrawTrSurf_Drawable
//purpose  : initialise the discretisation
//=======================================================================

DrawTrSurf_Drawable::DrawTrSurf_Drawable (

const Standard_Integer discret,
const Standard_Real    deflection,
const Standard_Integer DrawMode ) :
       myDrawMode (DrawMode),
       myDiscret(discret),
       myDeflection(deflection)
{
}

//=======================================================================
//function : DrawCurve2dOn
//purpose  : draw a 2D curve
//=======================================================================

void DrawTrSurf_Drawable::DrawCurve2dOn (Adaptor2d_Curve2d&   C, 
					 Draw_Display& aDisplay) const
{
  gp_Pnt P;
  
  gp_Pnt2d aPoint2d,
  *aPoint2dPtr ;
  if (myDrawMode == 1) {
    Standard_Real Fleche = myDeflection/aDisplay.Zoom();
    GCPnts_UniformDeflection LineVu(C,Fleche);
    if (LineVu.IsDone()) {
      P = LineVu.Value(1) ;
      aPoint2dPtr = (gp_Pnt2d *) &P ;
      aDisplay.MoveTo(*aPoint2dPtr);
      for (Standard_Integer i = 2; i <= LineVu.NbPoints(); i++) {
        P = LineVu.Value(i) ;
        aPoint2dPtr = (gp_Pnt2d *) &P ;
	aDisplay.DrawTo(*aPoint2dPtr);
      }
    }  
  }
  else {
    Standard_Integer intrv, nbintv = C.NbIntervals(GeomAbs_CN);
    TColStd_Array1OfReal TI(1,nbintv+1);
    C.Intervals(TI,GeomAbs_CN);
    C.D0(C.FirstParameter(),aPoint2d);
    aDisplay.MoveTo(aPoint2d);
    for (intrv = 1; intrv <= nbintv; intrv++) {
      if (C.GetType() != GeomAbs_Line) {
	Standard_Real t = TI(intrv);
	Standard_Real step = (TI(intrv+1) - t) / myDiscret;
	for (Standard_Integer i = 1; i < myDiscret; i++) {
	  t += step;
	  C.D0(t,aPoint2d);
	  aDisplay.DrawTo(aPoint2d);
	}
      }
      C.D0(TI(intrv+1),aPoint2d);
      aDisplay.DrawTo(aPoint2d);
    }
  }
}

//=======================================================================
//static function : PlotCurve
//purpose  : draw a 3D curve
//=======================================================================
static void PlotCurve (Draw_Display& aDisplay,
		       const Adaptor3d_Curve& C, 
		       Standard_Real& theFirstParam, 
		       Standard_Real  theHalfStep,
		       const gp_Pnt&  theFirstPnt,
		       const gp_Pnt&  theLastPnt)
{
  Standard_Real IsoRatio = 1.001;
  gp_Pnt Pm;

  C.D0 (theFirstParam + theHalfStep, Pm);
  
  Standard_Real dfLength = theFirstPnt.Distance(theLastPnt);
  if (dfLength < Precision::Confusion() || 
      Pm.Distance(theFirstPnt) + Pm.Distance(theLastPnt) <= IsoRatio*dfLength) {
    aDisplay.DrawTo (theLastPnt);
  } else {
    PlotCurve (aDisplay, C, theFirstParam, theHalfStep/2., theFirstPnt, Pm);
    Standard_Real aLocalF = theFirstParam + theHalfStep;
    PlotCurve (aDisplay, C, aLocalF, theHalfStep/2., Pm, theLastPnt);
  }
}
//=======================================================================
//function : DrawCurveOn
//purpose  : draw a 3D curve
//=======================================================================

void DrawTrSurf_Drawable::DrawCurveOn (Adaptor3d_Curve&   C, 
                                       Draw_Display& aDisplay) const
{
  gp_Pnt P;
  if (myDrawMode == 1)
  {
    Standard_Real Fleche = myDeflection/aDisplay.Zoom();
    GCPnts_UniformDeflection LineVu(C,Fleche);
    if (LineVu.IsDone())
    {
      aDisplay.MoveTo(LineVu.Value(1));
      for (Standard_Integer i = 2; i <= LineVu.NbPoints(); i++)
      {
        aDisplay.DrawTo(LineVu.Value(i));
      }
    }
  }
  else
  {
    Standard_Integer j;
    Standard_Integer intrv, nbintv = C.NbIntervals(GeomAbs_CN);
    TColStd_Array1OfReal TI(1,nbintv+1);
    C.Intervals(TI,GeomAbs_CN);
    C.D0(C.FirstParameter(),P);
    aDisplay.MoveTo(P);
    GeomAbs_CurveType CurvType = C.GetType();
    gp_Pnt aPPnt=P, aNPnt;

    for (intrv = 1; intrv <= nbintv; intrv++)
    {
      Standard_Real t = TI(intrv);
      Standard_Real step = (TI(intrv+1) - t) / myDiscret;

      switch (CurvType)
      {
      case GeomAbs_Line:
        break;
      case GeomAbs_Circle:
      case GeomAbs_Ellipse:
        for (j = 1; j < myDiscret; j++)
        {
          t += step;
          C.D0(t,P);
          aDisplay.DrawTo(P);
        }
        break;
      case GeomAbs_Parabola:
      case GeomAbs_Hyperbola:
      case GeomAbs_BezierCurve:
      case GeomAbs_BSplineCurve:
      case GeomAbs_OtherCurve:
        const Standard_Integer nIter = myDiscret/2;
        for (j = 1; j < nIter; j++)
        {
          const Standard_Real t1 = t+step*2.;
          C.D0 (t1, aNPnt);
          PlotCurve (aDisplay, C, t, step, aPPnt, aNPnt);
          aPPnt = aNPnt;
          t = t1;
        }

        break;
      }

      C.D0(TI(intrv+1),P);
      PlotCurve (aDisplay, C, t, step, aPPnt, P);
      aDisplay.DrawTo(P);
    }
  }
}


//=======================================================================
//function : DrawIsoCurveOn
//purpose  : 
//=======================================================================

void DrawTrSurf_Drawable::DrawIsoCurveOn(Adaptor3d_IsoCurve& C,
					 const GeomAbs_IsoType T,
					 const Standard_Real P,
					 const Standard_Real F,
					 const Standard_Real L,
					 Draw_Display& dis) const 
{
  C.Load(T,P,F,L);
  if ((C.GetType() == GeomAbs_BezierCurve) || 
      (C.GetType() == GeomAbs_BSplineCurve)) {
    GeomAdaptor_Curve GC;
    if (C.GetType() == GeomAbs_BezierCurve) 
      GC.Load(C.Bezier(),F,L);
    else
      GC.Load(C.BSpline(),F,L);
    
    DrawCurveOn(GC,dis);
  }
  else
    DrawCurveOn(C,dis);
  
}
Commit	Line	Data
b311480e	1	// Created on: 1991-07-16
	2	// Created by: Christophe MARION
	3	// Copyright (c) 1991-1999 Matra Datavision
973c2be1	4	// Copyright (c) 1999-2014 OPEN CASCADE SAS
b311480e	5	//
973c2be1	6	// This file is part of Open CASCADE Technology software library.
b311480e	7	//
d5f74e42	8	// This library is free software; you can redistribute it and/or modify it under
d5f74e42	9	// the terms of the GNU Lesser General Public License version 2.1 as published
973c2be1	10	// by the Free Software Foundation, with special exception defined in the file
	11	// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
	12	// distribution for complete text of the license and disclaimer of any warranty.
b311480e	13	//
973c2be1	14	// Alternatively, this file may be used under the terms of Open CASCADE
973c2be1	15	// commercial license or contractual agreement.
7fd59977	16
	17	#include <DrawTrSurf_Drawable.ixx>
	18	#include <GCPnts_UniformDeflection.hxx>
	19	#include <gp_Pnt.hxx>
	20	#include <gp_Pnt2d.hxx>
	21	#include <TColStd_Array1OfReal.hxx>
	22	#include <GeomAdaptor_Curve.hxx>
	23	#include <Geom_BezierCurve.hxx>
	24	#include <Geom_BSplineCurve.hxx>
	25	#include <Precision.hxx>
	26
	27
	28	//=======================================================================
	29	//function : DrawTrSurf_Drawable
	30	//purpose : initialise the discretisation
	31	//=======================================================================
	32
	33	DrawTrSurf_Drawable::DrawTrSurf_Drawable (
	34
	35	const Standard_Integer discret,
	36	const Standard_Real deflection,
	37	const Standard_Integer DrawMode ) :
	38	myDrawMode (DrawMode),
	39	myDiscret(discret),
	40	myDeflection(deflection)
	41	{
	42	}
	43
	44	//=======================================================================
	45	//function : DrawCurve2dOn
	46	//purpose : draw a 2D curve
	47	//=======================================================================
	48
	49	void DrawTrSurf_Drawable::DrawCurve2dOn (Adaptor2d_Curve2d& C,
	50	Draw_Display& aDisplay) const
	51	{
	52	gp_Pnt P;
	53
	54	gp_Pnt2d aPoint2d,
	55	*aPoint2dPtr ;
	56	if (myDrawMode == 1) {
	57	Standard_Real Fleche = myDeflection/aDisplay.Zoom();
	58	GCPnts_UniformDeflection LineVu(C,Fleche);
	59	if (LineVu.IsDone()) {
	60	P = LineVu.Value(1) ;
	61	aPoint2dPtr = (gp_Pnt2d *) &P ;
	62	aDisplay.MoveTo(*aPoint2dPtr);
	63	for (Standard_Integer i = 2; i <= LineVu.NbPoints(); i++) {
	64	P = LineVu.Value(i) ;
	65	aPoint2dPtr = (gp_Pnt2d *) &P ;
	66	aDisplay.DrawTo(*aPoint2dPtr);
	67	}
	68	}
	69	}
	70	else {
	71	Standard_Integer intrv, nbintv = C.NbIntervals(GeomAbs_CN);
	72	TColStd_Array1OfReal TI(1,nbintv+1);
	73	C.Intervals(TI,GeomAbs_CN);
	74	C.D0(C.FirstParameter(),aPoint2d);
	75	aDisplay.MoveTo(aPoint2d);
	76	for (intrv = 1; intrv <= nbintv; intrv++) {
	77	if (C.GetType() != GeomAbs_Line) {
	78	Standard_Real t = TI(intrv);
	79	Standard_Real step = (TI(intrv+1) - t) / myDiscret;
80	for (Standard_Integer i = 1; i < myDiscret; i++) {
81	t += step;
82	C.D0(t,aPoint2d);
83	aDisplay.DrawTo(aPoint2d);
84	}
85	}
86	C.D0(TI(intrv+1),aPoint2d);
87	aDisplay.DrawTo(aPoint2d);
88	}
89	}
90	}
91
92	//=======================================================================
93	//static function : PlotCurve
94	//purpose : draw a 3D curve
95	//=======================================================================
96	static void PlotCurve (Draw_Display& aDisplay,
97	const Adaptor3d_Curve& C,
98	Standard_Real& theFirstParam,
99	Standard_Real theHalfStep,
100	const gp_Pnt& theFirstPnt,
101	const gp_Pnt& theLastPnt)
102	{
103	Standard_Real IsoRatio = 1.001;
104	gp_Pnt Pm;
105
106	C.D0 (theFirstParam + theHalfStep, Pm);
107
108	Standard_Real dfLength = theFirstPnt.Distance(theLastPnt);
109	if (dfLength < Precision::Confusion() \|\|
110	Pm.Distance(theFirstPnt) + Pm.Distance(theLastPnt) <= IsoRatio*dfLength) {
111	aDisplay.DrawTo (theLastPnt);
112	} else {
113	PlotCurve (aDisplay, C, theFirstParam, theHalfStep/2., theFirstPnt, Pm);
114	Standard_Real aLocalF = theFirstParam + theHalfStep;
115	PlotCurve (aDisplay, C, aLocalF, theHalfStep/2., Pm, theLastPnt);
116	}
117	}
118	//=======================================================================
119	//function : DrawCurveOn
120	//purpose : draw a 3D curve
121	//=======================================================================
122
123	void DrawTrSurf_Drawable::DrawCurveOn (Adaptor3d_Curve& C,
32ca7a51	124	Draw_Display& aDisplay) const
7fd59977	125	{
7fd59977	126	gp_Pnt P;
32ca7a51	127	if (myDrawMode == 1)
32ca7a51	128	{
7fd59977	129	Standard_Real Fleche = myDeflection/aDisplay.Zoom();
7fd59977	130	GCPnts_UniformDeflection LineVu(C,Fleche);
32ca7a51	131	if (LineVu.IsDone())
32ca7a51	132	{
7fd59977	133	aDisplay.MoveTo(LineVu.Value(1));
32ca7a51	134	for (Standard_Integer i = 2; i <= LineVu.NbPoints(); i++)
	135	{
	136	aDisplay.DrawTo(LineVu.Value(i));
7fd59977	137	}
32ca7a51	138	}
7fd59977	139	}
32ca7a51	140	else
	141	{
	142	Standard_Integer j;
7fd59977	143	Standard_Integer intrv, nbintv = C.NbIntervals(GeomAbs_CN);
	144	TColStd_Array1OfReal TI(1,nbintv+1);
	145	C.Intervals(TI,GeomAbs_CN);
	146	C.D0(C.FirstParameter(),P);
	147	aDisplay.MoveTo(P);
	148	GeomAbs_CurveType CurvType = C.GetType();
	149	gp_Pnt aPPnt=P, aNPnt;
	150
32ca7a51	151	for (intrv = 1; intrv <= nbintv; intrv++)
32ca7a51	152	{
7fd59977	153	Standard_Real t = TI(intrv);
	154	Standard_Real step = (TI(intrv+1) - t) / myDiscret;
	155
32ca7a51	156	switch (CurvType)
	157	{
	158	case GeomAbs_Line:
	159	break;
	160	case GeomAbs_Circle:
	161	case GeomAbs_Ellipse:
	162	for (j = 1; j < myDiscret; j++)
	163	{
	164	t += step;
	165	C.D0(t,P);
	166	aDisplay.DrawTo(P);
	167	}
	168	break;
	169	case GeomAbs_Parabola:
	170	case GeomAbs_Hyperbola:
	171	case GeomAbs_BezierCurve:
	172	case GeomAbs_BSplineCurve:
	173	case GeomAbs_OtherCurve:
	174	const Standard_Integer nIter = myDiscret/2;
	175	for (j = 1; j < nIter; j++)
	176	{
	177	const Standard_Real t1 = t+step*2.;
	178	C.D0 (t1, aNPnt);
7fd59977	179	PlotCurve (aDisplay, C, t, step, aPPnt, aNPnt);
32ca7a51	180	aPPnt = aNPnt;
	181	t = t1;
	182	}
	183
	184	break;
7fd59977	185	}
	186
	187	C.D0(TI(intrv+1),P);
32ca7a51	188	PlotCurve (aDisplay, C, t, step, aPPnt, P);
7fd59977	189	aDisplay.DrawTo(P);
	190	}
	191	}
	192	}
	193
	194
	195	//=======================================================================
	196	//function : DrawIsoCurveOn
	197	//purpose :
	198	//=======================================================================
	199
	200	void DrawTrSurf_Drawable::DrawIsoCurveOn(Adaptor3d_IsoCurve& C,
	201	const GeomAbs_IsoType T,
	202	const Standard_Real P,
	203	const Standard_Real F,
	204	const Standard_Real L,
	205	Draw_Display& dis) const
	206	{
	207	C.Load(T,P,F,L);
	208	if ((C.GetType() == GeomAbs_BezierCurve) \|\|
	209	(C.GetType() == GeomAbs_BSplineCurve)) {
	210	GeomAdaptor_Curve GC;
	211	if (C.GetType() == GeomAbs_BezierCurve)
	212	GC.Load(C.Bezier(),F,L);
	213	else
	214	GC.Load(C.BSpline(),F,L);
	215
	216	DrawCurveOn(GC,dis);
	217	}
	218	else
	219	DrawCurveOn(C,dis);
	220
	221	}