1 // Created on: 1995-01-27
2 // Created by: Jacques GOUSSARD
3 // Copyright (c) 1995-1999 Matra Datavision
4 // Copyright (c) 1999-2014 OPEN CASCADE SAS
6 // This file is part of Open CASCADE Technology software library.
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
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.
14 // Alternatively, this file may be used under the terms of Open CASCADE
15 // commercial license or contractual agreement.
17 #ifndef _GeomInt_TheComputeLineOfWLApprox_HeaderFile
18 #define _GeomInt_TheComputeLineOfWLApprox_HeaderFile
20 #include <Standard.hxx>
21 #include <Standard_DefineAlloc.hxx>
22 #include <Standard_Handle.hxx>
24 #include <AppParCurves_MultiBSpCurve.hxx>
25 #include <Approx_ParametrizationType.hxx>
26 #include <TColStd_HArray1OfReal.hxx>
27 #include <TColStd_HArray1OfInteger.hxx>
28 #include <AppParCurves_HArray1OfConstraintCouple.hxx>
29 #include <Standard_Integer.hxx>
30 #include <AppParCurves_Constraint.hxx>
31 #include <math_Vector.hxx>
32 #include <TColStd_Array1OfReal.hxx>
33 #include <TColStd_Array1OfInteger.hxx>
34 class GeomInt_TheMultiLineOfWLApprox;
35 class GeomInt_TheMultiLineToolOfWLApprox;
36 class GeomInt_MyBSplGradientOfTheComputeLineOfWLApprox;
37 class GeomInt_BSpParLeastSquareOfMyBSplGradientOfTheComputeLineOfWLApprox;
38 class GeomInt_BSpParFunctionOfMyBSplGradientOfTheComputeLineOfWLApprox;
39 class GeomInt_BSpGradient_BFGSOfMyBSplGradientOfTheComputeLineOfWLApprox;
40 class GeomInt_MyGradientbisOfTheComputeLineOfWLApprox;
41 class GeomInt_ParLeastSquareOfMyGradientbisOfTheComputeLineOfWLApprox;
42 class GeomInt_ResConstraintOfMyGradientbisOfTheComputeLineOfWLApprox;
43 class GeomInt_ParFunctionOfMyGradientbisOfTheComputeLineOfWLApprox;
44 class GeomInt_Gradient_BFGSOfMyGradientbisOfTheComputeLineOfWLApprox;
45 class AppParCurves_MultiBSpCurve;
46 class AppParCurves_MultiCurve;
50 class GeomInt_TheComputeLineOfWLApprox
57 //! The MultiLine <Line> will be approximated until tolerances
59 //! The approximation will be done from degreemin to degreemax
60 //! with a cutting if the corresponding boolean is True.
61 //! If <Squares> is True, the computation will be done with
62 //! no iteration at all.
64 //! The multiplicities of the internal knots is set by
66 Standard_EXPORT GeomInt_TheComputeLineOfWLApprox(const GeomInt_TheMultiLineOfWLApprox& Line, const Standard_Integer degreemin = 4, const Standard_Integer degreemax = 8, const Standard_Real Tolerance3d = 1.0e-3, const Standard_Real Tolerance2d = 1.0e-6, const Standard_Integer NbIterations = 5, const Standard_Boolean cutting = Standard_True, const Approx_ParametrizationType parametrization = Approx_ChordLength, const Standard_Boolean Squares = Standard_False);
68 //! The MultiLine <Line> will be approximated until tolerances
70 //! The approximation will be done from degreemin to degreemax
71 //! with a cutting if the corresponding boolean is True.
72 //! If <Squares> is True, the computation will be done with
73 //! no iteration at all.
74 Standard_EXPORT GeomInt_TheComputeLineOfWLApprox(const GeomInt_TheMultiLineOfWLApprox& Line, const math_Vector& Parameters, const Standard_Integer degreemin = 4, const Standard_Integer degreemax = 8, const Standard_Real Tolerance3d = 1.0e-03, const Standard_Real Tolerance2d = 1.0e-06, const Standard_Integer NbIterations = 5, const Standard_Boolean cutting = Standard_True, const Standard_Boolean Squares = Standard_False);
76 //! Initializes the fields of the algorithm.
77 Standard_EXPORT GeomInt_TheComputeLineOfWLApprox(const math_Vector& Parameters, const Standard_Integer degreemin = 4, const Standard_Integer degreemax = 8, const Standard_Real Tolerance3d = 1.0e-03, const Standard_Real Tolerance2d = 1.0e-06, const Standard_Integer NbIterations = 5, const Standard_Boolean cutting = Standard_True, const Standard_Boolean Squares = Standard_False);
79 //! Initializes the fields of the algorithm.
80 Standard_EXPORT GeomInt_TheComputeLineOfWLApprox(const Standard_Integer degreemin = 4, const Standard_Integer degreemax = 8, const Standard_Real Tolerance3d = 1.0e-03, const Standard_Real Tolerance2d = 1.0e-06, const Standard_Integer NbIterations = 5, const Standard_Boolean cutting = Standard_True, const Approx_ParametrizationType parametrization = Approx_ChordLength, const Standard_Boolean Squares = Standard_False);
82 //! Constructs an interpolation of the MultiLine <Line>
83 //! The result will be a C2 curve of degree 3.
84 Standard_EXPORT void Interpol (const GeomInt_TheMultiLineOfWLApprox& Line);
86 //! Initializes the fields of the algorithm.
87 Standard_EXPORT void Init (const Standard_Integer degreemin = 4, const Standard_Integer degreemax = 8, const Standard_Real Tolerance3d = 1.0e-03, const Standard_Real Tolerance2d = 1.0e-06, const Standard_Integer NbIterations = 5, const Standard_Boolean cutting = Standard_True, const Approx_ParametrizationType parametrization = Approx_ChordLength, const Standard_Boolean Squares = Standard_False);
89 //! runs the algorithm after having initialized the fields.
90 Standard_EXPORT void Perform (const GeomInt_TheMultiLineOfWLApprox& Line);
92 //! The approximation will begin with the
93 //! set of parameters <ThePar>.
94 Standard_EXPORT void SetParameters (const math_Vector& ThePar);
96 //! The approximation will be done with the
97 //! set of knots <Knots>. The multiplicities will be set
98 //! with the degree and the desired continuity.
99 Standard_EXPORT void SetKnots (const TColStd_Array1OfReal& Knots);
101 //! The approximation will be done with the
102 //! set of knots <Knots> and the multiplicities <Mults>.
103 Standard_EXPORT void SetKnotsAndMultiplicities (const TColStd_Array1OfReal& Knots, const TColStd_Array1OfInteger& Mults);
105 //! changes the degrees of the approximation.
106 Standard_EXPORT void SetDegrees (const Standard_Integer degreemin, const Standard_Integer degreemax);
108 //! Changes the tolerances of the approximation.
109 Standard_EXPORT void SetTolerances (const Standard_Real Tolerance3d, const Standard_Real Tolerance2d);
111 //! sets the continuity of the spline.
112 //! if C = 2, the spline will be C2.
113 Standard_EXPORT void SetContinuity (const Standard_Integer C);
115 //! changes the first and the last constraint points.
116 Standard_EXPORT void SetConstraints (const AppParCurves_Constraint firstC, const AppParCurves_Constraint lastC);
118 //! Sets periodic flag.
119 //! If thePeriodic = Standard_True, algorithm tries to build periodic
120 //! multicurve using corresponding C1 boundary condition for first and last multipoints.
121 //! Multiline must be closed.
122 Standard_EXPORT void SetPeriodic(const Standard_Boolean thePeriodic);
124 //! returns False if at a moment of the approximation,
125 //! the status NoApproximation has been sent by the user
126 //! when more points were needed.
127 Standard_EXPORT Standard_Boolean IsAllApproximated() const;
129 //! returns False if the status NoPointsAdded has been sent.
130 Standard_EXPORT Standard_Boolean IsToleranceReached() const;
132 //! returns the tolerances 2d and 3d of the MultiBSpCurve.
133 Standard_EXPORT void Error (Standard_Real& tol3d, Standard_Real& tol2d) const;
135 //! returns the result of the approximation.
136 Standard_EXPORT const AppParCurves_MultiBSpCurve& Value() const;
138 //! returns the result of the approximation.
139 Standard_EXPORT AppParCurves_MultiBSpCurve& ChangeValue();
141 //! returns the new parameters of the approximation
142 //! corresponding to the points of the MultiBSpCurve.
143 Standard_EXPORT const TColStd_Array1OfReal& Parameters() const;
157 //! is internally used in the algorithm.
158 Standard_EXPORT Standard_Boolean Compute (const GeomInt_TheMultiLineOfWLApprox& Line, const Standard_Integer fpt, const Standard_Integer lpt, math_Vector& Para, const TColStd_Array1OfReal& Knots, TColStd_Array1OfInteger& Mults);
160 //! is internally used in the algorithm.
161 Standard_EXPORT Standard_Boolean ComputeCurve (const GeomInt_TheMultiLineOfWLApprox& Line, const Standard_Integer firspt, const Standard_Integer lastpt);
163 //! computes new parameters between firstP and lastP.
164 Standard_EXPORT void Parameters (const GeomInt_TheMultiLineOfWLApprox& Line, const Standard_Integer firstP, const Standard_Integer LastP, math_Vector& TheParameters) const;
166 Standard_EXPORT Standard_Real SearchFirstLambda (const GeomInt_TheMultiLineOfWLApprox& Line, const math_Vector& Para, const TColStd_Array1OfReal& Knots, const math_Vector& V, const Standard_Integer index) const;
168 Standard_EXPORT Standard_Real SearchLastLambda (const GeomInt_TheMultiLineOfWLApprox& Line, const math_Vector& Para, const TColStd_Array1OfReal& Knots, const math_Vector& V, const Standard_Integer index) const;
170 Standard_EXPORT void TangencyVector (const GeomInt_TheMultiLineOfWLApprox& Line, const AppParCurves_MultiCurve& C, const Standard_Real U, math_Vector& V) const;
172 Standard_EXPORT void FirstTangencyVector (const GeomInt_TheMultiLineOfWLApprox& Line, const Standard_Integer index, math_Vector& V) const;
174 Standard_EXPORT void LastTangencyVector (const GeomInt_TheMultiLineOfWLApprox& Line, const Standard_Integer index, math_Vector& V) const;
176 Standard_EXPORT void FindRealConstraints (const GeomInt_TheMultiLineOfWLApprox& Line);
179 AppParCurves_MultiBSpCurve TheMultiBSpCurve;
180 Standard_Boolean alldone;
181 Standard_Boolean tolreached;
182 Approx_ParametrizationType Par;
183 Handle(TColStd_HArray1OfReal) myParameters;
184 Handle(TColStd_HArray1OfReal) myfirstParam;
185 Handle(TColStd_HArray1OfReal) myknots;
186 Handle(TColStd_HArray1OfInteger) mymults;
187 Standard_Boolean myhasknots;
188 Standard_Boolean myhasmults;
189 Handle(AppParCurves_HArray1OfConstraintCouple) myConstraints;
190 Standard_Integer mydegremin;
191 Standard_Integer mydegremax;
192 Standard_Real mytol3d;
193 Standard_Real mytol2d;
194 Standard_Real currenttol3d;
195 Standard_Real currenttol2d;
196 Standard_Boolean mycut;
197 Standard_Boolean mysquares;
198 Standard_Integer myitermax;
199 AppParCurves_Constraint myfirstC;
200 AppParCurves_Constraint mylastC;
201 AppParCurves_Constraint realfirstC;
202 AppParCurves_Constraint reallastC;
203 Standard_Integer mycont;
204 Standard_Real mylambda1;
205 Standard_Real mylambda2;
206 Standard_Boolean myPeriodic;
217 #endif // _GeomInt_TheComputeLineOfWLApprox_HeaderFile