1 // Created on: 1997-10-06
2 // Created by: Roman BORISOV
3 // Copyright (c) 1997-1999 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 #include <Precision.hxx>
18 #include <Approx_CurveOnSurface.ixx>
21 #include <GeomAdaptor_HSurface.hxx>
22 #include <Adaptor3d_CurveOnSurface.hxx>
23 #include <TColStd_HArray1OfReal.hxx>
24 #include <AdvApprox_ApproxAFunction.hxx>
25 #include <Adaptor3d_HCurve.hxx>
26 #include <TColgp_Array1OfPnt.hxx>
27 #include <GeomAdaptor_HCurve.hxx>
28 #include <Geom2dAdaptor_HCurve.hxx>
29 #include <Adaptor3d_HCurveOnSurface.hxx>
30 #include <TColgp_Array1OfPnt2d.hxx>
31 #include <TColStd_Array1OfReal.hxx>
32 #include <AdvApprox_PrefAndRec.hxx>
33 #include <AdvApprox_DichoCutting.hxx>
35 //=======================================================================
36 //class : Approx_CurveOnSurface_Eval
37 //purpose: evaluator class for approximation of both 2d and 3d curves
38 //=======================================================================
40 class Approx_CurveOnSurface_Eval : public AdvApprox_EvaluatorFunction
43 Approx_CurveOnSurface_Eval (const Handle(Adaptor3d_HCurve)& theFunc,
44 const Handle(Adaptor2d_HCurve2d)& theFunc2d,
45 Standard_Real First, Standard_Real Last)
46 : fonct(theFunc), fonct2d(theFunc2d)
47 { StartEndSav[0] = First; StartEndSav[1] = Last; }
49 virtual void Evaluate (Standard_Integer *Dimension,
50 Standard_Real StartEnd[2],
51 Standard_Real *Parameter,
52 Standard_Integer *DerivativeRequest,
53 Standard_Real *Result, // [Dimension]
54 Standard_Integer *ErrorCode);
57 Handle(Adaptor3d_HCurve) fonct;
58 Handle(Adaptor2d_HCurve2d) fonct2d;
59 Standard_Real StartEndSav[2];
62 void Approx_CurveOnSurface_Eval::Evaluate (Standard_Integer *Dimension,
63 Standard_Real StartEnd[2],
64 Standard_Real *Param, // Parameter at which evaluation
65 Standard_Integer *Order, // Derivative Request
66 Standard_Real *Result,// [Dimension]
67 Standard_Integer *ErrorCode)
70 Standard_Real par = *Param;
72 // Dimension is incorrect
73 if (*Dimension != 5) {
77 // Parameter is incorrect
78 if(StartEnd[0] != StartEndSav[0] || StartEnd[1]!= StartEndSav[1])
80 fonct = fonct->Trim(StartEnd[0],StartEnd[1],Precision::PConfusion());
81 fonct2d = fonct2d->Trim(StartEnd[0],StartEnd[1],
82 Precision::PConfusion());
83 StartEndSav[0]=StartEnd[0];
84 StartEndSav[1]=StartEnd[1];
94 fonct2d->D0(par, pnt2d);
96 Result[0] = pnt2d.X();
97 Result[1] = pnt2d.Y();
107 fonct2d->D1(par, pnt2d, v21);
108 fonct->D1(par,pnt, v1);
120 fonct2d->D2(par, pnt2d, v21, v22);
121 fonct->D2(par, pnt, v1, v2);
130 Result[0] = Result[1] = Result[2] = Result[3] = Result[4] = 0.;
136 //=======================================================================
137 //class : Approx_CurveOnSurface_Eval3d
138 //purpose: evaluator class for approximation of 3d curve
139 //=======================================================================
141 class Approx_CurveOnSurface_Eval3d : public AdvApprox_EvaluatorFunction
144 Approx_CurveOnSurface_Eval3d (const Handle(Adaptor3d_HCurve)& theFunc,
145 Standard_Real First, Standard_Real Last)
146 : fonct(theFunc) { StartEndSav[0] = First; StartEndSav[1] = Last; }
148 virtual void Evaluate (Standard_Integer *Dimension,
149 Standard_Real StartEnd[2],
150 Standard_Real *Parameter,
151 Standard_Integer *DerivativeRequest,
152 Standard_Real *Result, // [Dimension]
153 Standard_Integer *ErrorCode);
156 Handle(Adaptor3d_HCurve) fonct;
157 Standard_Real StartEndSav[2];
160 void Approx_CurveOnSurface_Eval3d::Evaluate (Standard_Integer *Dimension,
161 Standard_Real StartEnd[2],
162 Standard_Real *Param, // Parameter at which evaluation
163 Standard_Integer *Order, // Derivative Request
164 Standard_Real *Result,// [Dimension]
165 Standard_Integer *ErrorCode)
168 Standard_Real par = *Param;
170 // Dimension is incorrect
171 if (*Dimension != 3) {
175 // Parameter is incorrect
176 if(StartEnd[0] != StartEndSav[0] || StartEnd[1]!= StartEndSav[1])
178 fonct = fonct->Trim(StartEnd[0],StartEnd[1],Precision::PConfusion());
179 StartEndSav[0]=StartEnd[0];
180 StartEndSav[1]=StartEnd[1];
187 pnt = fonct->Value(par);
195 fonct->D1(par, pnt, v1);
204 fonct->D2(par, pnt, v1, v2);
211 Result[0] = Result[1] = Result[2] = 0.;
217 //=======================================================================
218 //class : Approx_CurveOnSurface_Eval2d
219 //purpose: evaluator class for approximation of 2d curve
220 //=======================================================================
222 class Approx_CurveOnSurface_Eval2d : public AdvApprox_EvaluatorFunction
225 Approx_CurveOnSurface_Eval2d (const Handle(Adaptor2d_HCurve2d)& theFunc2d,
226 Standard_Real First, Standard_Real Last)
227 : fonct2d(theFunc2d) { StartEndSav[0] = First; StartEndSav[1] = Last; }
229 virtual void Evaluate (Standard_Integer *Dimension,
230 Standard_Real StartEnd[2],
231 Standard_Real *Parameter,
232 Standard_Integer *DerivativeRequest,
233 Standard_Real *Result, // [Dimension]
234 Standard_Integer *ErrorCode);
237 Handle(Adaptor2d_HCurve2d) fonct2d;
238 Standard_Real StartEndSav[2];
241 void Approx_CurveOnSurface_Eval2d::Evaluate (Standard_Integer *Dimension,
242 Standard_Real StartEnd[2],
243 Standard_Real *Param, // Parameter at which evaluation
244 Standard_Integer *Order, // Derivative Request
245 Standard_Real *Result,// [Dimension]
246 Standard_Integer *ErrorCode)
249 Standard_Real par = *Param;
251 // Dimension is incorrect
252 if (*Dimension != 2) {
256 // Parameter is incorrect
257 if(StartEnd[0] != StartEndSav[0] || StartEnd[1]!= StartEndSav[1])
259 fonct2d = fonct2d->Trim(StartEnd[0],StartEnd[1],Precision::PConfusion());
260 StartEndSav[0]=StartEnd[0];
261 StartEndSav[1]=StartEnd[1];
269 pnt = fonct2d->Value(par);
277 fonct2d->D1(par, pnt, v1);
285 fonct2d->D2(par, pnt, v1, v2);
291 Result[0] = Result[1] = 0.;
297 Approx_CurveOnSurface::Approx_CurveOnSurface(const Handle(Adaptor2d_HCurve2d)& C2D,
298 const Handle(Adaptor3d_HSurface)& Surf,
299 const Standard_Real First,
300 const Standard_Real Last,
301 const Standard_Real Tol,
302 const GeomAbs_Shape S,
303 const Standard_Integer MaxDegree,
304 const Standard_Integer MaxSegments,
305 const Standard_Boolean only3d,
306 const Standard_Boolean only2d)
308 myIsDone = Standard_False;
309 if(only3d && only2d) Standard_ConstructionError::Raise();
310 GeomAbs_Shape Order = S;
312 Handle( Adaptor2d_HCurve2d ) TrimmedC2D = C2D->Trim( First, Last, Precision::PConfusion() );
314 Adaptor3d_CurveOnSurface COnS( TrimmedC2D, Surf );
315 Handle(Adaptor3d_HCurveOnSurface) HCOnS = new Adaptor3d_HCurveOnSurface();
318 Standard_Integer Num1DSS = 0, Num2DSS=0, Num3DSS=0;
319 Handle(TColStd_HArray1OfReal) OneDTol;
320 Handle(TColStd_HArray1OfReal) TwoDTolNul;
321 Handle(TColStd_HArray1OfReal) ThreeDTol;
323 // create evaluators and choose appropriate one
324 Approx_CurveOnSurface_Eval3d Eval3dCvOnSurf (HCOnS, First, Last);
325 Approx_CurveOnSurface_Eval2d Eval2dCvOnSurf ( TrimmedC2D, First, Last);
326 Approx_CurveOnSurface_Eval EvalCvOnSurf (HCOnS, TrimmedC2D, First, Last);
327 AdvApprox_EvaluatorFunction* EvalPtr;
328 if ( only3d ) EvalPtr = &Eval3dCvOnSurf;
329 else if ( only2d ) EvalPtr = &Eval2dCvOnSurf;
330 else EvalPtr = &EvalCvOnSurf;
332 // Initialization for 2d approximation
335 OneDTol = new TColStd_HArray1OfReal(1,Num1DSS);
337 Standard_Real TolU, TolV;
339 TolU = Surf->UResolution(Tol)/2;
340 TolV = Surf->VResolution(Tol)/2;
342 OneDTol->SetValue(1,TolU);
343 OneDTol->SetValue(2,TolV);
348 ThreeDTol = new TColStd_HArray1OfReal(1,Num3DSS);
349 ThreeDTol->Init(Tol/2);
356 Standard_Integer NbInterv_C2 = HCOnS->NbIntervals(GeomAbs_C2);
357 TColStd_Array1OfReal CutPnts_C2(1, NbInterv_C2 + 1);
358 HCOnS->Intervals(CutPnts_C2, GeomAbs_C2);
359 Standard_Integer NbInterv_C3 = HCOnS->NbIntervals(GeomAbs_C3);
360 TColStd_Array1OfReal CutPnts_C3(1, NbInterv_C3 + 1);
361 HCOnS->Intervals(CutPnts_C3, GeomAbs_C3);
363 AdvApprox_PrefAndRec CutTool(CutPnts_C2,CutPnts_C3);
364 AdvApprox_ApproxAFunction aApprox (Num1DSS, Num2DSS, Num3DSS,
365 OneDTol, TwoDTolNul, ThreeDTol,
367 MaxDegree, MaxSegments,
370 myIsDone = aApprox.IsDone();
371 myHasResult = aApprox.HasResult();
374 Handle(TColStd_HArray1OfReal) Knots = aApprox.Knots();
375 Handle(TColStd_HArray1OfInteger) Mults = aApprox.Multiplicities();
376 Standard_Integer Degree = aApprox.Degree();
380 TColgp_Array1OfPnt Poles(1,aApprox.NbPoles());
381 aApprox.Poles(1,Poles);
382 myCurve3d = new Geom_BSplineCurve(Poles, Knots->Array1(), Mults->Array1(), Degree);
383 myError3d = aApprox.MaxError(3, 1);
387 TColgp_Array1OfPnt2d Poles2d(1,aApprox.NbPoles());
388 TColStd_Array1OfReal Poles1dU(1,aApprox.NbPoles());
389 aApprox.Poles1d(1, Poles1dU);
390 TColStd_Array1OfReal Poles1dV(1,aApprox.NbPoles());
391 aApprox.Poles1d(2, Poles1dV);
392 for(Standard_Integer i = 1; i <= aApprox.NbPoles(); i++)
393 Poles2d.SetValue(i, gp_Pnt2d(Poles1dU.Value(i), Poles1dV.Value(i)));
394 myCurve2d = new Geom2d_BSplineCurve(Poles2d, Knots->Array1(), Mults->Array1(), Degree);
396 myError2dU = aApprox.MaxError(1, 1);
397 myError2dV = aApprox.MaxError(1, 2);
405 Standard_Boolean Approx_CurveOnSurface::IsDone() const
410 Standard_Boolean Approx_CurveOnSurface::HasResult() const
415 Handle(Geom_BSplineCurve) Approx_CurveOnSurface::Curve3d() const
420 Handle(Geom2d_BSplineCurve) Approx_CurveOnSurface::Curve2d() const
425 Standard_Real Approx_CurveOnSurface::MaxError3d() const
430 Standard_Real Approx_CurveOnSurface::MaxError2dU() const
435 Standard_Real Approx_CurveOnSurface::MaxError2dV() const