0024002: Overall code and build procedure refactoring -- automatic
[occt.git] / src / Approx / Approx_Curve3d.cxx
CommitLineData
b311480e 1// Created on: 1998-08-20
2// Created by: Philippe MANGIN
3// Copyright (c) 1998-1999 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 <Adaptor3d_HCurve.hxx>
19#include <AdvApprox_ApproxAFunction.hxx>
20#include <AdvApprox_PrefAndRec.hxx>
21#include <Approx_Curve3d.hxx>
22#include <Geom_BSplineCurve.hxx>
23#include <GeomAdaptor_HCurve.hxx>
7fd59977 24#include <gp_Pnt.hxx>
25#include <gp_Vec.hxx>
7fd59977 26#include <Precision.hxx>
42cf5bc1 27#include <Standard_ConstructionError.hxx>
28#include <Standard_OutOfRange.hxx>
29#include <TColgp_Array1OfPnt.hxx>
30#include <TColStd_HArray1OfReal.hxx>
7fd59977 31
32//=======================================================================
33//class : Approx_Curve3d_Eval
34//purpose: evaluator class for approximation
35//=======================================================================
7fd59977 36class Approx_Curve3d_Eval : public AdvApprox_EvaluatorFunction
37{
38 public:
39 Approx_Curve3d_Eval (const Handle(Adaptor3d_HCurve)& 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(Adaptor3d_HCurve) fonct;
52 Standard_Real StartEndSav[2];
53};
54
55void Approx_Curve3d_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!=3) {
67 *ErrorCode = 1;
68 }
69
70 if(StartEnd[0] != StartEndSav[0] || StartEnd[1]!= StartEndSav[1])
71 {
72 fonct = fonct->Trim(StartEnd[0],StartEnd[1],Precision::PConfusion());
73 StartEndSav[0]=StartEnd[0];
74 StartEndSav[1]=StartEnd[1];
75 }
76
77 gp_Pnt pnt;
78 gp_Vec v1, v2;
79
80 switch (*Order) {
81 case 0:
82 pnt = fonct->Value(par);
83 Result[0] = pnt.X();
84 Result[1] = pnt.Y();
85 Result[2] = pnt.Z();
86 break;
87 case 1:
88 fonct->D1(par, pnt, v1);
89 Result[0] = v1.X();
90 Result[1] = v1.Y();
91 Result[2] = v1.Z();
92 break;
93 case 2:
94 fonct->D2(par, pnt, v1, v2);
95 Result[0] = v2.X();
96 Result[1] = v2.Y();
97 Result[2] = v2.Z();
98 break;
99 default:
100 Result[0] = Result[1] = Result[2] = 0.;
101 *ErrorCode = 3;
102 break;
103 }
104}
105
106Approx_Curve3d::Approx_Curve3d(const Handle(Adaptor3d_HCurve)& Curve,
107 const Standard_Real Tol3d,
108 const GeomAbs_Shape Order,
109 const Standard_Integer MaxSegments,
110 const Standard_Integer MaxDegree)
111{
112 // Initialisation of input parameters of AdvApprox
113
114 Standard_Integer Num1DSS=0, Num2DSS=0, Num3DSS=1;
115 Handle(TColStd_HArray1OfReal) OneDTolNul, TwoDTolNul;
116 Handle(TColStd_HArray1OfReal) ThreeDTol =
117 new TColStd_HArray1OfReal(1,Num3DSS);
118 ThreeDTol->Init(Tol3d);
119
120 Standard_Real First = Curve->FirstParameter();
121 Standard_Real Last = Curve->LastParameter();
122
123 Standard_Integer NbInterv_C2 = Curve->NbIntervals(GeomAbs_C2);
124 TColStd_Array1OfReal CutPnts_C2(1, NbInterv_C2+1);
125 Curve->Intervals(CutPnts_C2,GeomAbs_C2);
126 Standard_Integer NbInterv_C3 = Curve->NbIntervals(GeomAbs_C3);
127 TColStd_Array1OfReal CutPnts_C3(1, NbInterv_C3+1);
128 Curve->Intervals(CutPnts_C3,GeomAbs_C3);
129
130 AdvApprox_PrefAndRec CutTool(CutPnts_C2,CutPnts_C3);
131
132 myMaxError = 0;
133
134 Approx_Curve3d_Eval ev (Curve, First, Last);
135 AdvApprox_ApproxAFunction aApprox (Num1DSS, Num2DSS, Num3DSS,
136 OneDTolNul, TwoDTolNul, ThreeDTol,
137 First, Last, Order,
138 MaxDegree, MaxSegments,
139 ev, CutTool);
140
141 myIsDone = aApprox.IsDone();
142 myHasResult = aApprox.HasResult();
143
144 if (myHasResult) {
145 TColgp_Array1OfPnt Poles(1,aApprox.NbPoles());
146 aApprox.Poles(1,Poles);
147 Handle(TColStd_HArray1OfReal) Knots = aApprox.Knots();
148 Handle(TColStd_HArray1OfInteger) Mults = aApprox.Multiplicities();
149 Standard_Integer Degree = aApprox.Degree();
150 myBSplCurve = new Geom_BSplineCurve(Poles, Knots->Array1(), Mults->Array1(), Degree);
151 myMaxError = aApprox.MaxError(3, 1);
152 }
153}
154
155 Handle(Geom_BSplineCurve) Approx_Curve3d::Curve() const
156{
157 return myBSplCurve;
158}
159
160 Standard_Boolean Approx_Curve3d::IsDone() const
161{
162 return myIsDone;
163}
164
165 Standard_Boolean Approx_Curve3d::HasResult() const
166{
167 return myHasResult;
168}
169
170 Standard_Real Approx_Curve3d::MaxError() const
171{
172 return myMaxError;
173}
174
175 void Approx_Curve3d::Dump(Standard_OStream& o) const
176{
177 o << "******* Dump of ApproxCurve *******" << endl;
178 o << "*******Degree " << Curve()->Degree() << endl;
179 o << "*******NbSegments " << Curve()->NbKnots() - 1 << endl;
180 o << "*******Error " << MaxError() << endl;
181}