0030675: Visualization - remove redundant proxy classes in hierarchy of PrsMgr_Presen...
[occt.git] / src / Geom2dConvert / Geom2dConvert_ApproxCurve.cxx
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b311480e 1// Created on: 1997-09-11
2// Created by: Roman BORISOV
3// Copyright (c) 1997-1999 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
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
15// commercial license or contractual agreement.
7fd59977 16
42cf5bc1 17
18#include <Adaptor2d_HCurve2d.hxx>
19#include <AdvApprox_ApproxAFunction.hxx>
20#include <AdvApprox_PrefAndRec.hxx>
21#include <Geom2d_BSplineCurve.hxx>
22#include <Geom2d_Curve.hxx>
23#include <Geom2dAdaptor_HCurve.hxx>
24#include <Geom2dConvert_ApproxCurve.hxx>
7fd59977 25#include <gp_Pnt2d.hxx>
26#include <gp_Vec2d.hxx>
7fd59977 27#include <Precision.hxx>
42cf5bc1 28#include <Standard_OutOfRange.hxx>
29#include <TColgp_Array1OfPnt2d.hxx>
30#include <TColStd_HArray1OfReal.hxx>
7fd59977 31
32//=======================================================================
33//class : Geom2dConvert_ApproxCurve_Eval
34//purpose: evaluator class for approximation
35//=======================================================================
7fd59977 36class Geom2dConvert_ApproxCurve_Eval : public AdvApprox_EvaluatorFunction
37{
38 public:
39 Geom2dConvert_ApproxCurve_Eval (const Handle(Adaptor2d_HCurve2d)& theFunc,
40 Standard_Real First, Standard_Real Last)
41 : fonct(theFunc) { StartEndSav[0] = First; StartEndSav[1] = Last; }
42
43 virtual void Evaluate (Standard_Integer *Dimension,
44 Standard_Real StartEnd[2],
45 Standard_Real *Parameter,
46 Standard_Integer *DerivativeRequest,
47 Standard_Real *Result, // [Dimension]
48 Standard_Integer *ErrorCode);
49
50 private:
51 Handle(Adaptor2d_HCurve2d) fonct;
52 Standard_Real StartEndSav[2];
53};
54
55void Geom2dConvert_ApproxCurve_Eval::Evaluate (Standard_Integer *Dimension,
56 Standard_Real StartEnd[2],
57 Standard_Real *Param, // Parameter at which evaluation
58 Standard_Integer *Order, // Derivative Request
59 Standard_Real *Result,// [Dimension]
60 Standard_Integer *ErrorCode)
61{
62 *ErrorCode = 0;
63 Standard_Real par = *Param;
64
65// Dimension is incorrect
66 if (*Dimension!=2) {
67 *ErrorCode = 1;
68 }
69// Parameter is incorrect
70 if ( par < StartEnd[0] || par > StartEnd[1] ) {
71 *ErrorCode = 2;
72 }
73 if(StartEnd[0] != StartEndSav[0] || StartEnd[1]!= StartEndSav[1])
74 {
75 fonct = fonct->Trim(StartEnd[0],StartEnd[1],Precision::PConfusion());
76 StartEndSav[0]=StartEnd[0];
77 StartEndSav[1]=StartEnd[1];
78 }
79
80 gp_Pnt2d pnt;
81 gp_Vec2d v1, v2;
82
83 switch (*Order) {
84 case 0:
85 pnt = fonct->Value(par);
86 Result[0] = pnt.X();
87 Result[1] = pnt.Y();
88 break;
89 case 1:
90 fonct->D1(par, pnt, v1);
91 Result[0] = v1.X();
92 Result[1] = v1.Y();
93 break;
94 case 2:
95 fonct->D2(par, pnt, v1, v2);
96 Result[0] = v2.X();
97 Result[1] = v2.Y();
98 break;
99 default:
100 Result[0] = Result[1] = 0.;
101 *ErrorCode = 3;
102 break;
103 }
104}
105
106Geom2dConvert_ApproxCurve::Geom2dConvert_ApproxCurve(const Handle(Geom2d_Curve)& Curve,const Standard_Real Tol2d,const GeomAbs_Shape Order,const Standard_Integer MaxSegments,const Standard_Integer MaxDegree)
107{
108 Handle(Geom2dAdaptor_HCurve) HCurve = new Geom2dAdaptor_HCurve (Curve);
be09e9bf 109 Approximate(HCurve, Tol2d, Order, MaxSegments, MaxDegree);
110}
7fd59977 111
be09e9bf 112Geom2dConvert_ApproxCurve::Geom2dConvert_ApproxCurve(const Handle(Adaptor2d_HCurve2d)& Curve,
113 const Standard_Real Tol2d,
114 const GeomAbs_Shape Order,
115 const Standard_Integer MaxSegments,
116 const Standard_Integer MaxDegree)
117{
118 Approximate(Curve, Tol2d, Order, MaxSegments, MaxDegree);
119}
120
121void Geom2dConvert_ApproxCurve::Approximate(const Handle(Adaptor2d_HCurve2d)& theCurve,
122 const Standard_Real theTol2d,
123 const GeomAbs_Shape theOrder,
124 const Standard_Integer theMaxSegments,
125 const Standard_Integer theMaxDegree)
126{
7fd59977 127 // Initialisation of input parameters of AdvApprox
128
129 Standard_Integer Num1DSS=0, Num2DSS=1, Num3DSS=0;
be09e9bf 130 Handle(TColStd_HArray1OfReal) OneDTolNul, ThreeDTolNul;
7fd59977 131 Handle(TColStd_HArray1OfReal) TwoDTol = new TColStd_HArray1OfReal(1,Num2DSS);
be09e9bf 132 TwoDTol->Init(theTol2d);
7fd59977 133
be09e9bf 134 Standard_Real First = theCurve->FirstParameter();
135 Standard_Real Last = theCurve->LastParameter();
7fd59977 136
be09e9bf 137 Standard_Integer NbInterv_C2 = theCurve->NbIntervals(GeomAbs_C2);
7fd59977 138 TColStd_Array1OfReal CutPnts_C2(1, NbInterv_C2+1);
be09e9bf 139 theCurve->Intervals(CutPnts_C2,GeomAbs_C2);
140 Standard_Integer NbInterv_C3 = theCurve->NbIntervals(GeomAbs_C3);
7fd59977 141 TColStd_Array1OfReal CutPnts_C3(1, NbInterv_C3+1);
be09e9bf 142 theCurve->Intervals(CutPnts_C3,GeomAbs_C3);
7fd59977 143 AdvApprox_PrefAndRec CutTool(CutPnts_C2,CutPnts_C3);
144
145 myMaxError = 0;
146
be09e9bf 147 Geom2dConvert_ApproxCurve_Eval ev (theCurve, First, Last);
7fd59977 148 AdvApprox_ApproxAFunction aApprox (Num1DSS, Num2DSS, Num3DSS,
be09e9bf 149 OneDTolNul, TwoDTol, ThreeDTolNul,
150 First, Last, theOrder,
151 theMaxDegree, theMaxSegments,
152 ev, CutTool);
7fd59977 153
154 myIsDone = aApprox.IsDone();
155 myHasResult = aApprox.HasResult();
156
157 if (myHasResult) {
158 TColgp_Array1OfPnt2d Poles(1,aApprox.NbPoles());
159 aApprox.Poles2d(1,Poles);
160 Handle(TColStd_HArray1OfReal) Knots = aApprox.Knots();
161 Handle(TColStd_HArray1OfInteger) Mults = aApprox.Multiplicities();
162 Standard_Integer Degree = aApprox.Degree();
163 myBSplCurve = new Geom2d_BSplineCurve(Poles, Knots->Array1(), Mults->Array1(), Degree);
164 myMaxError = aApprox.MaxError(2, 1);
165 }
166}
167
168 Handle(Geom2d_BSplineCurve) Geom2dConvert_ApproxCurve::Curve() const
169{
170 return myBSplCurve;
171}
172
173 Standard_Boolean Geom2dConvert_ApproxCurve::IsDone() const
174{
175 return myIsDone;
176}
177
178 Standard_Boolean Geom2dConvert_ApproxCurve::HasResult() const
179{
180 return myHasResult;
181}
182
183 Standard_Real Geom2dConvert_ApproxCurve::MaxError() const
184{
185 return myMaxError;
186}
187
188 void Geom2dConvert_ApproxCurve::Dump(Standard_OStream& o) const
189{
190 o << "******* Dump of ApproxCurve *******" << endl;
191 o << "******* Error " << MaxError() << endl;
192}
193