1 // Created on: 1997-10-06
2 // Created by: Roman BORISOV
3 // Copyright (c) 1997-1999 Matra Datavision
4 // Copyright (c) 1999-2012 OPEN CASCADE SAS
6 // The content of this file is subject to the Open CASCADE Technology Public
7 // License Version 6.5 (the "License"). You may not use the content of this file
8 // except in compliance with the License. Please obtain a copy of the License
9 // at http://www.opencascade.org and read it completely before using this file.
11 // The Initial Developer of the Original Code is Open CASCADE S.A.S., having its
12 // main offices at: 1, place des Freres Montgolfier, 78280 Guyancourt, France.
14 // The Original Code and all software distributed under the License is
15 // distributed on an "AS IS" basis, without warranty of any kind, and the
16 // Initial Developer hereby disclaims all such warranties, including without
17 // limitation, any warranties of merchantability, fitness for a particular
18 // purpose or non-infringement. Please see the License for the specific terms
19 // and conditions governing the rights and limitations under the License.
22 #include <Precision.hxx>
23 #include <Approx_CurveOnSurface.ixx>
26 #include <GeomAdaptor_HSurface.hxx>
27 #include <Adaptor3d_CurveOnSurface.hxx>
28 #include <TColStd_HArray1OfReal.hxx>
29 #include <AdvApprox_ApproxAFunction.hxx>
30 #include <Adaptor3d_HCurve.hxx>
31 #include <TColgp_Array1OfPnt.hxx>
32 #include <GeomAdaptor_HCurve.hxx>
33 #include <Geom2dAdaptor_HCurve.hxx>
34 #include <Adaptor3d_HCurveOnSurface.hxx>
35 #include <TColgp_Array1OfPnt2d.hxx>
36 #include <TColStd_Array1OfReal.hxx>
37 #include <AdvApprox_PrefAndRec.hxx>
38 #include <AdvApprox_DichoCutting.hxx>
40 //=======================================================================
41 //class : Approx_CurveOnSurface_Eval
42 //purpose: evaluator class for approximation of both 2d and 3d curves
43 //=======================================================================
45 class Approx_CurveOnSurface_Eval : public AdvApprox_EvaluatorFunction
48 Approx_CurveOnSurface_Eval (const Handle(Adaptor3d_HCurve)& theFunc,
49 const Handle(Adaptor2d_HCurve2d)& theFunc2d,
50 Standard_Real First, Standard_Real Last)
51 : fonct(theFunc), fonct2d(theFunc2d)
52 { StartEndSav[0] = First; StartEndSav[1] = Last; }
54 virtual void Evaluate (Standard_Integer *Dimension,
55 Standard_Real StartEnd[2],
56 Standard_Real *Parameter,
57 Standard_Integer *DerivativeRequest,
58 Standard_Real *Result, // [Dimension]
59 Standard_Integer *ErrorCode);
62 Handle(Adaptor3d_HCurve) fonct;
63 Handle(Adaptor2d_HCurve2d) fonct2d;
64 Standard_Real StartEndSav[2];
67 void Approx_CurveOnSurface_Eval::Evaluate (Standard_Integer *Dimension,
68 Standard_Real StartEnd[2],
69 Standard_Real *Param, // Parameter at which evaluation
70 Standard_Integer *Order, // Derivative Request
71 Standard_Real *Result,// [Dimension]
72 Standard_Integer *ErrorCode)
75 Standard_Real par = *Param;
77 // Dimension is incorrect
78 if (*Dimension != 5) {
82 // Parameter is incorrect
83 if(StartEnd[0] != StartEndSav[0] || StartEnd[1]!= StartEndSav[1])
85 fonct = fonct->Trim(StartEnd[0],StartEnd[1],Precision::PConfusion());
86 fonct2d = fonct2d->Trim(StartEnd[0],StartEnd[1],
87 Precision::PConfusion());
88 StartEndSav[0]=StartEnd[0];
89 StartEndSav[1]=StartEnd[1];
99 fonct2d->D0(par, pnt2d);
101 Result[0] = pnt2d.X();
102 Result[1] = pnt2d.Y();
112 fonct2d->D1(par, pnt2d, v21);
113 fonct->D1(par,pnt, v1);
125 fonct2d->D2(par, pnt2d, v21, v22);
126 fonct->D2(par, pnt, v1, v2);
135 Result[0] = Result[1] = Result[2] = Result[3] = Result[4] = 0.;
141 //=======================================================================
142 //class : Approx_CurveOnSurface_Eval3d
143 //purpose: evaluator class for approximation of 3d curve
144 //=======================================================================
146 class Approx_CurveOnSurface_Eval3d : public AdvApprox_EvaluatorFunction
149 Approx_CurveOnSurface_Eval3d (const Handle(Adaptor3d_HCurve)& theFunc,
150 Standard_Real First, Standard_Real Last)
151 : fonct(theFunc) { StartEndSav[0] = First; StartEndSav[1] = Last; }
153 virtual void Evaluate (Standard_Integer *Dimension,
154 Standard_Real StartEnd[2],
155 Standard_Real *Parameter,
156 Standard_Integer *DerivativeRequest,
157 Standard_Real *Result, // [Dimension]
158 Standard_Integer *ErrorCode);
161 Handle(Adaptor3d_HCurve) fonct;
162 Standard_Real StartEndSav[2];
165 void Approx_CurveOnSurface_Eval3d::Evaluate (Standard_Integer *Dimension,
166 Standard_Real StartEnd[2],
167 Standard_Real *Param, // Parameter at which evaluation
168 Standard_Integer *Order, // Derivative Request
169 Standard_Real *Result,// [Dimension]
170 Standard_Integer *ErrorCode)
173 Standard_Real par = *Param;
175 // Dimension is incorrect
176 if (*Dimension != 3) {
180 // Parameter is incorrect
181 if(StartEnd[0] != StartEndSav[0] || StartEnd[1]!= StartEndSav[1])
183 fonct = fonct->Trim(StartEnd[0],StartEnd[1],Precision::PConfusion());
184 StartEndSav[0]=StartEnd[0];
185 StartEndSav[1]=StartEnd[1];
192 pnt = fonct->Value(par);
200 fonct->D1(par, pnt, v1);
209 fonct->D2(par, pnt, v1, v2);
216 Result[0] = Result[1] = Result[2] = 0.;
222 //=======================================================================
223 //class : Approx_CurveOnSurface_Eval2d
224 //purpose: evaluator class for approximation of 2d curve
225 //=======================================================================
227 class Approx_CurveOnSurface_Eval2d : public AdvApprox_EvaluatorFunction
230 Approx_CurveOnSurface_Eval2d (const Handle(Adaptor2d_HCurve2d)& theFunc2d,
231 Standard_Real First, Standard_Real Last)
232 : fonct2d(theFunc2d) { StartEndSav[0] = First; StartEndSav[1] = Last; }
234 virtual void Evaluate (Standard_Integer *Dimension,
235 Standard_Real StartEnd[2],
236 Standard_Real *Parameter,
237 Standard_Integer *DerivativeRequest,
238 Standard_Real *Result, // [Dimension]
239 Standard_Integer *ErrorCode);
242 Handle(Adaptor2d_HCurve2d) fonct2d;
243 Standard_Real StartEndSav[2];
246 void Approx_CurveOnSurface_Eval2d::Evaluate (Standard_Integer *Dimension,
247 Standard_Real StartEnd[2],
248 Standard_Real *Param, // Parameter at which evaluation
249 Standard_Integer *Order, // Derivative Request
250 Standard_Real *Result,// [Dimension]
251 Standard_Integer *ErrorCode)
254 Standard_Real par = *Param;
256 // Dimension is incorrect
257 if (*Dimension != 2) {
261 // Parameter is incorrect
262 if(StartEnd[0] != StartEndSav[0] || StartEnd[1]!= StartEndSav[1])
264 fonct2d = fonct2d->Trim(StartEnd[0],StartEnd[1],Precision::PConfusion());
265 StartEndSav[0]=StartEnd[0];
266 StartEndSav[1]=StartEnd[1];
274 pnt = fonct2d->Value(par);
282 fonct2d->D1(par, pnt, v1);
290 fonct2d->D2(par, pnt, v1, v2);
296 Result[0] = Result[1] = 0.;
302 Approx_CurveOnSurface::Approx_CurveOnSurface(const Handle(Adaptor2d_HCurve2d)& C2D,
303 const Handle(Adaptor3d_HSurface)& Surf,
304 const Standard_Real First,
305 const Standard_Real Last,
306 const Standard_Real Tol,
307 const GeomAbs_Shape S,
308 const Standard_Integer MaxDegree,
309 const Standard_Integer MaxSegments,
310 const Standard_Boolean only3d,
311 const Standard_Boolean only2d)
313 myIsDone = Standard_False;
314 if(only3d && only2d) Standard_ConstructionError::Raise();
315 GeomAbs_Shape Order = S;
317 Handle( Adaptor2d_HCurve2d ) TrimmedC2D = C2D->Trim( First, Last, Precision::PConfusion() );
319 Adaptor3d_CurveOnSurface COnS( TrimmedC2D, Surf );
320 Handle(Adaptor3d_HCurveOnSurface) HCOnS = new Adaptor3d_HCurveOnSurface();
323 Standard_Integer Num1DSS = 0, Num2DSS=0, Num3DSS=0;
324 Handle(TColStd_HArray1OfReal) OneDTol;
325 Handle(TColStd_HArray1OfReal) TwoDTolNul;
326 Handle(TColStd_HArray1OfReal) ThreeDTol;
328 // create evaluators and choose appropriate one
329 Approx_CurveOnSurface_Eval3d Eval3dCvOnSurf (HCOnS, First, Last);
330 Approx_CurveOnSurface_Eval2d Eval2dCvOnSurf ( TrimmedC2D, First, Last);
331 Approx_CurveOnSurface_Eval EvalCvOnSurf (HCOnS, TrimmedC2D, First, Last);
332 AdvApprox_EvaluatorFunction* EvalPtr;
333 if ( only3d ) EvalPtr = &Eval3dCvOnSurf;
334 else if ( only2d ) EvalPtr = &Eval2dCvOnSurf;
335 else EvalPtr = &EvalCvOnSurf;
337 // Initialization for 2d approximation
340 OneDTol = new TColStd_HArray1OfReal(1,Num1DSS);
342 Standard_Real TolU, TolV;
344 TolU = Surf->UResolution(Tol)/2;
345 TolV = Surf->VResolution(Tol)/2;
347 OneDTol->SetValue(1,TolU);
348 OneDTol->SetValue(2,TolV);
353 ThreeDTol = new TColStd_HArray1OfReal(1,Num3DSS);
354 ThreeDTol->Init(Tol/2);
361 Standard_Integer NbInterv_C2 = HCOnS->NbIntervals(GeomAbs_C2);
362 TColStd_Array1OfReal CutPnts_C2(1, NbInterv_C2 + 1);
363 HCOnS->Intervals(CutPnts_C2, GeomAbs_C2);
364 Standard_Integer NbInterv_C3 = HCOnS->NbIntervals(GeomAbs_C3);
365 TColStd_Array1OfReal CutPnts_C3(1, NbInterv_C3 + 1);
366 HCOnS->Intervals(CutPnts_C3, GeomAbs_C3);
368 AdvApprox_PrefAndRec CutTool(CutPnts_C2,CutPnts_C3);
369 AdvApprox_ApproxAFunction aApprox (Num1DSS, Num2DSS, Num3DSS,
370 OneDTol, TwoDTolNul, ThreeDTol,
372 MaxDegree, MaxSegments,
375 myIsDone = aApprox.IsDone();
376 myHasResult = aApprox.HasResult();
379 Handle(TColStd_HArray1OfReal) Knots = aApprox.Knots();
380 Handle(TColStd_HArray1OfInteger) Mults = aApprox.Multiplicities();
381 Standard_Integer Degree = aApprox.Degree();
385 TColgp_Array1OfPnt Poles(1,aApprox.NbPoles());
386 aApprox.Poles(1,Poles);
387 myCurve3d = new Geom_BSplineCurve(Poles, Knots->Array1(), Mults->Array1(), Degree);
388 myError3d = aApprox.MaxError(3, 1);
392 TColgp_Array1OfPnt2d Poles2d(1,aApprox.NbPoles());
393 TColStd_Array1OfReal Poles1dU(1,aApprox.NbPoles());
394 aApprox.Poles1d(1, Poles1dU);
395 TColStd_Array1OfReal Poles1dV(1,aApprox.NbPoles());
396 aApprox.Poles1d(2, Poles1dV);
397 for(Standard_Integer i = 1; i <= aApprox.NbPoles(); i++)
398 Poles2d.SetValue(i, gp_Pnt2d(Poles1dU.Value(i), Poles1dV.Value(i)));
399 myCurve2d = new Geom2d_BSplineCurve(Poles2d, Knots->Array1(), Mults->Array1(), Degree);
401 myError2dU = aApprox.MaxError(1, 1);
402 myError2dV = aApprox.MaxError(1, 2);
410 Standard_Boolean Approx_CurveOnSurface::IsDone() const
415 Standard_Boolean Approx_CurveOnSurface::HasResult() const
420 Handle(Geom_BSplineCurve) Approx_CurveOnSurface::Curve3d() const
425 Handle(Geom2d_BSplineCurve) Approx_CurveOnSurface::Curve2d() const
430 Standard_Real Approx_CurveOnSurface::MaxError3d() const
435 Standard_Real Approx_CurveOnSurface::MaxError2dU() const
440 Standard_Real Approx_CurveOnSurface::MaxError2dV() const