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0024023: Revamp the OCCT Handle -- ambiguity
[occt.git] / src / BRepFill / BRepFill_NSections.cxx
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b311480e 1// Created on: 1998-12-29
2// Created by: Joelle CHAUVET
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
17#include <stdio.h>
18
19#include <BRepFill_NSections.ixx>
20
21#include <BRepFill.hxx>
22#include <BRepTools_WireExplorer.hxx>
23#include <BRep_Builder.hxx>
24#include <BRep_Tool.hxx>
25#include <BRepAdaptor_Curve.hxx>
26#include <BRepLProp.hxx>
27
28#include <BRepLib_MakeWire.hxx>
29#include <BRepLib_MakeEdge.hxx>
30#include <TopExp.hxx>
31#include <TopoDS.hxx>
32#include <TopoDS_Vertex.hxx>
33#include <TopoDS_Wire.hxx>
34
35#include <Geom_Curve.hxx>
36#include <Geom_Line.hxx>
37#include <Geom_TrimmedCurve.hxx>
38#include <Geom_BSplineCurve.hxx>
39#include <Geom_Conic.hxx>
40#include <GeomFill_UniformSection.hxx>
41#include <GeomFill_EvolvedSection.hxx>
42#include <GeomFill_HArray1OfSectionLaw.hxx>
43#include <GeomFill_NSections.hxx>
44#include <TColGeom_SequenceOfCurve.hxx>
45#include <GeomFill_SectionGenerator.hxx>
46#include <GeomFill_Line.hxx>
47#include <GeomFill_AppSurf.hxx>
48#include <GeomConvert.hxx>
49#include <GeomConvert_ApproxCurve.hxx>
50#include <GeomConvert_CompCurveToBSplineCurve.hxx>
51#include <Geom_BSplineSurface.hxx>
52#include <BSplCLib.hxx>
53
54#include <TColgp_HArray1OfPnt.hxx>
55#include <TColStd_HArray1OfReal.hxx>
56#include <TColStd_HArray1OfInteger.hxx>
57#include <Geom_BezierCurve.hxx>
58#include <TopTools_Array1OfShape.hxx>
59
60#include <Precision.hxx>
61
0797d9d3 62#ifdef OCCT_DEBUG
7fd59977 63static Standard_Boolean Affich = 0;
64#endif
65
66#ifdef DRAW
67#include <DrawTrSurf.hxx>
68#include <DBRep.hxx>
69#endif
70
5e5b6f81 71
72//=======================================================================
73//function : EdgeToBSpline
74//purpose : auxiliary -- get curve from edge and convert it to bspline
75// parameterized from 0 to 1
76//=======================================================================
77
78// NOTE: this code duplicates the same function in BRepOffsetAPI_ThruSections.cxx
79static Handle(Geom_BSplineCurve) EdgeToBSpline (const TopoDS_Edge& theEdge)
80{
81 Handle(Geom_BSplineCurve) aBSCurve;
82 if (BRep_Tool::Degenerated(theEdge)) {
83 // degenerated edge : construction of a point curve
84 TColStd_Array1OfReal aKnots (1,2);
85 aKnots(1) = 0.;
86 aKnots(2) = 1.;
87
88 TColStd_Array1OfInteger aMults (1,2);
89 aMults(1) = 2;
90 aMults(2) = 2;
91
92 TColgp_Array1OfPnt aPoles(1,2);
93 TopoDS_Vertex vf, vl;
94 TopExp::Vertices(theEdge,vl,vf);
95 aPoles(1) = BRep_Tool::Pnt(vf);
96 aPoles(2) = BRep_Tool::Pnt(vl);
97
98 aBSCurve = new Geom_BSplineCurve (aPoles, aKnots, aMults, 1);
99 }
100 else
101 {
102 // get the curve of the edge
103 TopLoc_Location aLoc;
104 Standard_Real aFirst, aLast;
105 Handle(Geom_Curve) aCurve = BRep_Tool::Curve (theEdge, aLoc, aFirst, aLast);
106
107 // convert its part used by edge to bspline; note that if edge curve is bspline,
108 // conversion made via trimmed curve is still needed -- it will copy it, segment
109 // as appropriate, and remove periodicity if it is periodic (deadly for approximator)
110 Handle(Geom_TrimmedCurve) aTrimCurve = new Geom_TrimmedCurve (aCurve, aFirst, aLast);
111
112 // special treatment of conic curve
113 if (aTrimCurve->BasisCurve()->IsKind(STANDARD_TYPE(Geom_Conic)))
114 {
543a9964 115 const Handle(Geom_Curve)& aCurve = aTrimCurve; // to avoid ambiguity
116 GeomConvert_ApproxCurve anAppr (aCurve, Precision::Confusion(), GeomAbs_C1, 16, 14);
5e5b6f81 117 if (anAppr.HasResult())
118 aBSCurve = anAppr.Curve();
119 }
120
121 // general case
122 if (aBSCurve.IsNull())
123 aBSCurve = GeomConvert::CurveToBSplineCurve (aTrimCurve);
124
125 // apply transformation if needed
126 if (! aLoc.IsIdentity())
127 aBSCurve->Transform (aLoc.Transformation());
128
129 // reparameterize to [0,1]
130 TColStd_Array1OfReal aKnots (1, aBSCurve->NbKnots());
131 aBSCurve->Knots (aKnots);
132 BSplCLib::Reparametrize (0., 1., aKnots);
133 aBSCurve->SetKnots (aKnots);
134 }
135
136 // reverse curve if edge is reversed
137 if (theEdge.Orientation() == TopAbs_REVERSED)
138 aBSCurve->Reverse();
139
140 return aBSCurve;
141}
142
7fd59977 143//=======================================================================
144//function : totalsurf
145//purpose :
146//=======================================================================
147
148static Handle(Geom_BSplineSurface) totalsurf(const TopTools_Array2OfShape& shapes,
149 const Standard_Integer NbSects,
150 const Standard_Integer NbEdges,
151 const TColStd_SequenceOfReal& params,
152 const Standard_Boolean w1Point,
153 const Standard_Boolean w2Point,
154 const Standard_Boolean uClosed,
155 const Standard_Boolean vClosed,
156 const Standard_Real myPres3d)
157{
158 Standard_Integer i,j,jdeb=1,jfin=NbSects;
159 TopoDS_Edge edge;
7fd59977 160 TopoDS_Vertex vf,vl;
161
162 GeomFill_SectionGenerator section;
163 Handle(Geom_BSplineSurface) surface;
164 Handle(Geom_BSplineCurve) BS, BS1;
7fd59977 165
166 if (w1Point) {
167 jdeb++;
168 edge = TopoDS::Edge(shapes.Value(1,1));
169 TopExp::Vertices(edge,vl,vf);
170 TColgp_Array1OfPnt Extremities(1,2);
171 Extremities(1) = BRep_Tool::Pnt(vf);
172 Extremities(2) = BRep_Tool::Pnt(vl);
173 TColStd_Array1OfReal Bounds(1,2);
174 Bounds(1) = 0.;
175 Bounds(2) = 1.;
7fd59977 176 TColStd_Array1OfInteger Mult(1,2);
5e5b6f81 177 Mult(1) = 2;
178 Mult(2) = 2;
7fd59977 179 Handle(Geom_BSplineCurve) BSPoint
5e5b6f81 180 = new Geom_BSplineCurve(Extremities,Bounds,Mult, 1);
7fd59977 181 section.AddCurve(BSPoint);
182 }
183
184 if (w2Point) {
185 jfin--;
186 }
187
188 for (j=jdeb; j<=jfin; j++) {
189
0d969553 190 // case of looping sections
7fd59977 191 if (j==jfin && vClosed) {
192 section.AddCurve(BS1);
193 }
194
195 else {
196 // read the first edge to initialise CompBS;
5e5b6f81 197 TopoDS_Edge aPrevEdge = TopoDS::Edge (shapes.Value(1,j));
198 Handle(Geom_BSplineCurve) curvBS = EdgeToBSpline (aPrevEdge);
7fd59977 199
0d969553 200 // initialization
7fd59977 201 GeomConvert_CompCurveToBSplineCurve CompBS(curvBS);
202
203 for (i=2; i<=NbEdges; i++) {
204 // read the edge
5e5b6f81 205 TopoDS_Edge aNextEdge = TopoDS::Edge (shapes.Value(i,j));
206 curvBS = EdgeToBSpline (aNextEdge);
7fd59977 207
208 // concatenation
209 TopoDS_Vertex ComV;
210 Standard_Real epsV;
5e5b6f81 211 Standard_Boolean Bof = TopExp::CommonVertex(aPrevEdge, aNextEdge, ComV);
7fd59977 212 if (Bof) epsV = BRep_Tool::Tolerance(ComV);
213 else epsV = Precision::Confusion();
214 Bof = CompBS.Add(curvBS, epsV, Standard_True, Standard_False, 1);
215 if (!Bof) Bof = CompBS.Add(curvBS, 200*epsV,
216 Standard_True, Standard_False, 1);
5e5b6f81 217
218 // remember previous edge
219 aPrevEdge = aNextEdge;
7fd59977 220 }
221
0d969553 222 // return the final section
7fd59977 223 BS = CompBS.BSplineCurve();
224 section.AddCurve(BS);
225
0d969553 226 // case of looping sections
7fd59977 227 if (j==jdeb && vClosed) {
228 BS1 = BS;
229 }
230
231 }
232 }
233
234 if (w2Point) {
235 edge = TopoDS::Edge(shapes.Value(NbEdges,NbSects));
236 TopExp::Vertices(edge,vl,vf);
237 TColgp_Array1OfPnt Extremities(1,2);
238 Extremities(1) = BRep_Tool::Pnt(vf);
239 Extremities(2) = BRep_Tool::Pnt(vl);
240 TColStd_Array1OfReal Bounds(1,2);
241 Bounds(1) = 0.;
242 Bounds(2) = 1.;
7fd59977 243 TColStd_Array1OfInteger Mult(1,2);
5e5b6f81 244 Mult(1) = 2;
245 Mult(2) = 2;
7fd59977 246 Handle(Geom_BSplineCurve) BSPoint
5e5b6f81 247 = new Geom_BSplineCurve(Extremities,Bounds,Mult,1);
7fd59977 248 section.AddCurve(BSPoint);
249 }
250
251 Handle(TColStd_HArray1OfReal) HPar
252 = new TColStd_HArray1OfReal(1,params.Length());
253 for (i=1; i<=params.Length(); i++) {
254 HPar->SetValue(i,params(i));
255 }
256 section.SetParam(HPar);
257 section.Perform(Precision::PConfusion());
258 Handle(GeomFill_Line) line = new GeomFill_Line(NbSects);
259 Standard_Integer nbIt = 0, degmin = 2, degmax = 6;
260 Standard_Boolean knownP = Standard_True;
261 GeomFill_AppSurf anApprox(degmin, degmax, myPres3d, myPres3d, nbIt, knownP);
262 Standard_Boolean SpApprox = Standard_True;
263 anApprox.Perform(line, section, SpApprox);
264 Standard_Boolean uperiodic = uClosed;
265 Standard_Boolean vperiodic = vClosed;
266 Standard_Integer nup = anApprox.SurfPoles().ColLength(),
267 nvp = anApprox.SurfPoles().RowLength();
268 TColStd_Array1OfInteger Umults(1,anApprox.SurfUKnots().Length());
269 Umults = anApprox.SurfUMults();
270 TColStd_Array1OfInteger Vmults(1,anApprox.SurfVKnots().Length());
271 Vmults = anApprox.SurfVMults();
272
273 if (uperiodic) {
274 Standard_Integer nbuk = anApprox.SurfUKnots().Length();
275 Umults(1) --;
276 Umults(nbuk) --;
277 nup --;
278 }
279
280 if (vperiodic) {
281 Standard_Integer nbvk = anApprox.SurfVKnots().Length();
282 Vmults(1) --;
283 Vmults(nbvk) --;
284 nvp --;
285 }
286
287 TColgp_Array2OfPnt poles (1, nup, 1, nvp);
288 TColStd_Array2OfReal weights(1, nup, 1, nvp);
289 for (j = 1; j <= nvp; j++) {
290 for (i = 1; i <= nup; i++) {
291 poles(i, j) = anApprox.SurfPoles()(i,j);
292 weights(i, j) = anApprox.SurfWeights()(i,j);
293 }
294 }
295
296 // To create non-rational surface if possible
297 Standard_Real TolEps = 1.e-13;
298 Standard_Boolean Vrational = Standard_False, Urational = Standard_False;
299 for (j = 1; j <= weights.UpperCol(); j++)
300 if (!Vrational)
301 for (i = 1; i <= weights.UpperRow()-1; i++)
302 {
303 //Standard_Real signeddelta = weights(i,j) - weights(i+1,j);
304 Standard_Real delta = Abs( weights(i,j) - weights(i+1,j) );
305// Standard_Real eps = Epsilon( Abs(weights(i,j)) );
306 if (delta > TolEps/* || delta > 3.*eps*/)
307 {
308 Vrational = Standard_True;
309 break;
310 }
311 }
312 for (i = 1; i <= weights.UpperRow(); i++)
313 if (!Urational)
314 for (j = 1; j <= weights.UpperCol()-1; j++)
315 {
316 //Standard_Real signeddelta = weights(i,j) - weights(i,j+1);
317 Standard_Real delta = Abs( weights(i,j) - weights(i,j+1) );
318// Standard_Real eps = Epsilon( Abs(weights(i,j)) );
319 if (delta > TolEps/* || delta > 3.*eps*/)
320 {
321 Urational = Standard_True;
322 break;
323 }
324 }
325 if (!Vrational && !Urational)
326 {
327 Standard_Real theWeight = weights(1,1);
328 for (i = 1; i <= weights.UpperRow(); i++)
329 for (j = 1; j <= weights.UpperCol(); j++)
330 weights(i,j) = theWeight;
331 }
332
333 surface =
334 new Geom_BSplineSurface(poles, weights,
335 anApprox.SurfUKnots(), anApprox.SurfVKnots(),
336 Umults, Vmults,
337 anApprox.UDegree(), anApprox.VDegree(),
338 uperiodic, vperiodic);
339 return surface;
340
341}
342
343
344//=======================================================================
345//function : Create
346//purpose : WSeq
347//=======================================================================
348
349BRepFill_NSections::BRepFill_NSections(const TopTools_SequenceOfShape& S,
350 const Standard_Boolean Build)
351
352{
353 myShapes = S;
354 VFirst = 0.;
355 VLast = 1.;
356 TColStd_SequenceOfReal par;
357 par.Clear();
358 for (Standard_Integer i=1;i<=S.Length();i++) {
359 par.Append(i-1);
360 }
361 myParams = par;
362 Init(par,Build);
363}
364
365//=======================================================================
366//function : Create
367//purpose : WSeq + Param
368//=======================================================================
369
370BRepFill_NSections::BRepFill_NSections(const TopTools_SequenceOfShape& S,
d7325741 371 const GeomFill_SequenceOfTrsf& Transformations,
7fd59977 372 const TColStd_SequenceOfReal & P,
373 const Standard_Real VF,
374 const Standard_Real VL,
375 const Standard_Boolean Build)
376
377{
0797d9d3 378#ifdef OCCT_DEBUG
7fd59977 379 if ( Affich) {
380#ifdef DRAW
381 Standard_Integer NBSECT = 0;
382 for (Standard_Integer i=1;i<=S.Length();i++) {
383 NBSECT++;
384 char name[256];
385 sprintf(name,"WIRE_%d",NBSECT);
386 DBRep::Set(name,TopoDS::Wire(S.Value(i)));
387 }
388#endif
389 }
390#endif
391 Standard_Boolean ok = Standard_True;
392 for (Standard_Integer iseq=1;iseq<P.Length();iseq++) {
393 ok = ok && (P.Value(iseq)<P.Value(iseq+1));
394 }
395 if (ok) {
396 myParams = P;
397 myShapes = S;
d7325741 398 myTrsfs = Transformations;
7fd59977 399 VFirst = VF;
400 VLast = VL;
401 Init(P,Build);
402 }
403}
404
405//=======================================================================
406//function : Init
0d969553 407//purpose : Create a table of GeomFill_SectionLaw
7fd59977 408//=======================================================================
409void BRepFill_NSections::Init(const TColStd_SequenceOfReal & P,
410 const Standard_Boolean Build)
411{
412 BRepTools_WireExplorer wexp;
413// Class BRep_Tool without fields and without Constructor :
414// BRep_Tool B;
415 TopoDS_Edge E;
416 Standard_Integer ii, NbEdge, jj, NbSects = P.Length();
417 Standard_Integer ideb = 1, ifin = NbSects;
418 Standard_Boolean wClosed, w1Point = Standard_True,
419 w2Point = Standard_True;
420 Standard_Real First, Last;
421 TopoDS_Wire W;
422
0d969553 423 // Check if the start and end wires are punctual
7fd59977 424 W = TopoDS::Wire(myShapes(1));
425 for (wexp.Init(W); wexp.More(); wexp.Next())
426// w1Point = w1Point && B.Degenerated(wexp.Current());
427 w1Point = w1Point && BRep_Tool::Degenerated(wexp.Current());
428 if (w1Point) ideb++;
429 W = TopoDS::Wire(myShapes(NbSects));
430 for (wexp.Init(W); wexp.More(); wexp.Next())
431// w2Point = w2Point && B.Degenerated(wexp.Current());
432 w2Point = w2Point && BRep_Tool::Degenerated(wexp.Current());
433 if (w2Point) ifin--;
434
0d969553 435 // Check if the start and end wires are identical
7fd59977 436 vclosed = myShapes(1).IsSame(myShapes(NbSects));
437
0d969553 438 // Count the number of non-degenerated edges
7fd59977 439 W = TopoDS::Wire(myShapes(ideb));
440 for (NbEdge=0, wexp.Init(W); wexp.More(); wexp.Next())
441// if (! B.Degenerated(wexp.Current())) NbEdge++;
442 if (! BRep_Tool::Degenerated(wexp.Current())) NbEdge++;
443
7fd59977 444 myEdges = new (TopTools_HArray2OfShape) (1, NbEdge, 1, NbSects);
445
0d969553 446 // Fill tables
7fd59977 447 uclosed = Standard_True;
448 for (jj=ideb;jj<=ifin;jj++){
449
450 W = TopoDS::Wire(myShapes(jj));
451
452 for (ii=1, wexp.Init(W); ii<=NbEdge ; wexp.Next(), ii++) {
453 E = wexp.Current();
454
455// if ( ! B.Degenerated(E)) {
456 if ( ! BRep_Tool::Degenerated(E)) {
457 myEdges->SetValue(ii,jj, E);
458 }
459 }
460
0d969553 461 // Is the law closed by U ?
7fd59977 462
463 wClosed = W.Closed();
464 if (!wClosed) {
0d969553 465 // if unsure about the flag, make check
7fd59977 466 TopoDS_Edge Edge1, Edge2;
467 TopoDS_Vertex V1,V2;
468 Edge1 = TopoDS::Edge (myEdges->Value(NbEdge,jj));
469 Edge2 = TopoDS::Edge (myEdges->Value(1,jj));
470
471 if ( Edge1.Orientation() == TopAbs_REVERSED) {
472 V1 = TopExp::FirstVertex(Edge1);
473 }
474 else {
475 V1 = TopExp::LastVertex(Edge1);
476 }
477 if ( Edge2.Orientation() == TopAbs_REVERSED) {
478 V2 = TopExp::LastVertex(Edge2);
479 }
480 else {
481 V2 = TopExp::FirstVertex(Edge2);
482 }
483 if (V1.IsSame(V2)) {
484 wClosed = Standard_True;
485 }
486 else {
487 BRepAdaptor_Curve Curve1(Edge1);
488 BRepAdaptor_Curve Curve2(Edge2);
489 Standard_Real U1 = BRep_Tool::Parameter(V1,Edge1);
490 Standard_Real U2 = BRep_Tool::Parameter(V2,Edge2);
491 Standard_Real Eps = BRep_Tool::Tolerance(V2) +
492 BRep_Tool::Tolerance(V1);
493
494 wClosed = Curve1.Value(U1).IsEqual(Curve2.Value(U2), Eps);
495 }
496 }
497 if (!wClosed) uclosed = Standard_False;
498 }
499
0d969553 500 // point sections at end
7fd59977 501 if (w1Point) {
502 W = TopoDS::Wire(myShapes(1));
503 wexp.Init(W);
504 E = wexp.Current();
505 for (ii=1; ii<=NbEdge ; ii++) {
506 myEdges->SetValue(ii, 1, E);
507 }
508 }
509
510 if (w2Point) {
511 W = TopoDS::Wire(myShapes(NbSects));
512 wexp.Init(W);
513 E = wexp.Current();
514 for (ii=1; ii<=NbEdge ; ii++) {
515 myEdges->SetValue(ii, NbSects, E);
516 }
517 }
518
519
520 myLaws = new (GeomFill_HArray1OfSectionLaw) (1, NbEdge);
521
522 Standard_Real tol = Precision::Confusion();
523 mySurface = totalsurf(myEdges->Array2(),myShapes.Length(),NbEdge,
524 myParams,w1Point,w2Point,uclosed,vclosed,tol);
525
0d969553
Y		 526 // Increase the degree so that the position D2
527 // on GeomFill_NSections could be correct
528 // see comments in GeomFill_NSections
7fd59977 529 if (mySurface->VDegree()<2) {
530 mySurface->IncreaseDegree(mySurface->UDegree(),2);
531 }
532#ifdef DRAW
533 if ( Affich) {
534 char* name = new char[100];
535 sprintf(name,"Ref_Surf");
536 DrawTrSurf::Set(name,mySurface);
537 }
538#endif
539
0d969553 540 // Fill tables
7fd59977 541 if (Build) {
542 for (ii=1; ii<=NbEdge ; ii++) {
543 TColGeom_SequenceOfCurve NC;
544 NC.Clear();
545 for (jj=1;jj<=NbSects;jj++) {
546 E = TopoDS::Edge (myEdges->Value(ii,jj));
547 Handle(Geom_Curve) C;
548// if (B.Degenerated(E)) {
549 if (BRep_Tool::Degenerated(E)) {
550 TopoDS_Vertex vf,vl;
551 TopExp::Vertices(E,vl,vf);
552 TColgp_Array1OfPnt Extremities(1,2);
553 Extremities(1) = BRep_Tool::Pnt(vf);
554 Extremities(2) = BRep_Tool::Pnt(vl);
555 TColStd_Array1OfReal Bounds(1,2);
556 Bounds(1) = 0.;
557 Bounds(2) = 1.;
558 TColStd_Array1OfInteger Mult(1,2);
559 Mult(1) = 2;
560 Mult(2) = 2;
561 Handle(Geom_BSplineCurve) BSPoint
562 = new Geom_BSplineCurve(Extremities,Bounds,Mult,1);
563 C = BSPoint;
564 }
565 else {
566 C = BRep_Tool::Curve(E,First,Last);
567
568 if (E.Orientation() == TopAbs_REVERSED) {
569 Standard_Real aux;
570 Handle(Geom_Curve) CBis;
0d969553 571 CBis = C->Reversed(); // To avoid the spoiling of the topology
7fd59977 572 aux = C->ReversedParameter(First);
573 First = C->ReversedParameter(Last);
574 Last = aux;
575 C = CBis;
576 }
da72a17c 577 if ((ii>1) || (!BRep_Tool::IsClosed(E)) ) { // Cut C
7fd59977 578 Handle(Geom_TrimmedCurve) TC =
579 new (Geom_TrimmedCurve) (C,First, Last);
580 C = TC;
581 }
0d969553 582 // otherwise preserve the integrity of the curve
7fd59977 583 }
584 NC.Append(C);
585 }
586
587 Standard_Real Ufirst = ii-1;
588 Standard_Real Ulast = ii;
d7325741 589 myLaws->ChangeValue(ii) = new (GeomFill_NSections)(NC, myTrsfs, myParams,
7fd59977 590 Ufirst,Ulast,
591 VFirst,VLast,
592 mySurface);
593 }
594
595 }
596
597}
598
599
600//=======================================================================
601//function : IsVertex
602//purpose :
603//=======================================================================
604 Standard_Boolean BRepFill_NSections::IsVertex() const
605{
606 return Standard_False;
607}
608
609//=======================================================================
610//function : IsConstant
611//purpose :
612//=======================================================================
613 Standard_Boolean BRepFill_NSections::IsConstant() const
614{
615 return Standard_False;
616}
617
618//=======================================================================
619//function : Vertex
620//purpose :
621//=======================================================================
622 TopoDS_Vertex
623 BRepFill_NSections::Vertex(const Standard_Integer Index,
624 const Standard_Real Param) const
625{
626 BRep_Builder B;
627 TopoDS_Vertex V;
628 B.MakeVertex(V);
629 gp_Pnt P;
630
631 if (Index <= myEdges->ColLength()) {
632 Handle(Geom_BSplineCurve) Curve
633 = Handle(Geom_BSplineCurve)::DownCast(myLaws->Value(Index)->
634 BSplineSurface()->VIso(Param));
635 Standard_Real first = Curve ->FirstParameter();
636 Curve->D0(first, P);
637 B.UpdateVertex(V, P, Precision::Confusion());
638 }
639 else if (Index == myEdges->ColLength()+1) {
640 Handle(Geom_BSplineCurve) Curve
641 = Handle(Geom_BSplineCurve)::DownCast(myLaws->Value(Index-1)->
642 BSplineSurface()->VIso(Param));
643 Standard_Real last = Curve ->LastParameter();
644 Curve->D0(last, P);
645 B.UpdateVertex(V, P, Precision::Confusion());
646 }
647
648 return V;
649}
650
651
652///=======================================================================
653//function : VertexTol
0d969553 654//purpose : Evaluate the hole between 2 edges of the section
7fd59977 655//=======================================================================
656 Standard_Real BRepFill_NSections::VertexTol(const Standard_Integer Index,
657 const Standard_Real Param) const
658{
659 Standard_Real Tol = Precision::Confusion();
660 Standard_Integer I1, I2;
661 if ( (Index==0) || (Index==myEdges->ColLength()) ) {
0d969553 662 if (!uclosed) return Tol; //The least possible error
7fd59977 663 I1 = myEdges->ColLength();
664 I2 = 1;
665 }
666 else {
667 I1 = Index;
668 I2 = I1 +1;
669 }
670
671 Handle(GeomFill_SectionLaw) Loi;
672 Standard_Integer NbPoles, NbKnots, Degree;
673 Handle(TColgp_HArray1OfPnt) Poles;
674 Handle(TColStd_HArray1OfReal) Knots, Weigth;
675 Handle(TColStd_HArray1OfInteger) Mults;
676 Handle(Geom_BSplineCurve) BS;
677 gp_Pnt PFirst;
678
679 Loi = myLaws->Value(I1);
680 Loi->SectionShape( NbPoles, NbKnots, Degree);
681 Poles = new (TColgp_HArray1OfPnt) (1, NbPoles);
682 Weigth = new (TColStd_HArray1OfReal) (1, NbPoles);
683 Loi->D0(Param, Poles->ChangeArray1(), Weigth->ChangeArray1());
684 Knots = new (TColStd_HArray1OfReal) (1, NbKnots);
685 Loi->Knots(Knots->ChangeArray1());
686 Mults = new (TColStd_HArray1OfInteger) (1, NbKnots);
687 Loi->Mults(Mults->ChangeArray1());
688 BS = new (Geom_BSplineCurve) (Poles->Array1(),
689 Weigth->Array1(),
690 Knots->Array1(),
691 Mults->Array1(),
692 Degree,
693 Loi->IsUPeriodic());
694 PFirst = BS->Value( Knots->Value(Knots->Length()) );
695
696 Loi = myLaws->Value(I2);
697 Loi->SectionShape( NbPoles, NbKnots, Degree);
698 Poles = new (TColgp_HArray1OfPnt) (1, NbPoles);
699 Weigth = new (TColStd_HArray1OfReal) (1, NbPoles);
700 Loi->D0(Param, Poles->ChangeArray1(), Weigth->ChangeArray1());
701 Knots = new (TColStd_HArray1OfReal) (1, NbKnots);
702 Loi->Knots(Knots->ChangeArray1());
703 Mults = new (TColStd_HArray1OfInteger) (1, NbKnots);
704 Loi->Mults(Mults->ChangeArray1());
705 BS = new (Geom_BSplineCurve) (Poles->Array1(),
706 Weigth->Array1(),
707 Knots->Array1(),
708 Mults->Array1(),
709 Degree,
710 Loi->IsUPeriodic());
711 Tol += PFirst.Distance(BS->Value( Knots->Value(1)));
712 return Tol;
713}
714
715//=======================================================================
716//function : ConcatenedLaw
717//purpose :
718//=======================================================================
719
720 Handle(GeomFill_SectionLaw) BRepFill_NSections::ConcatenedLaw() const
721{
722 Handle(GeomFill_SectionLaw) Law;
723 if (myLaws->Length() == 1)
724 return myLaws->Value(1);
725 else {
726 Standard_Real Ufirst, Ulast, Vfirst, Vlast;
727 mySurface->Bounds(Ufirst, Ulast, Vfirst, Vlast);
728 TColGeom_SequenceOfCurve NCompo;
729 NCompo.Clear();
730 for (Standard_Integer jj=1; jj<=myShapes.Length(); jj++) {
731 NCompo.Append(mySurface->VIso(myParams(jj)));
732 }
d7325741 733 Law = new (GeomFill_NSections)(NCompo, myTrsfs, myParams,
7fd59977 734 Ufirst, Ulast,
735 Vfirst, Vlast,
736 mySurface);
737 }
738 return Law;
739}
740
741//=======================================================================
742//function : Continuity
743//purpose :
744//=======================================================================
745 GeomAbs_Shape BRepFill_NSections::Continuity(const Standard_Integer Index,
746 const Standard_Real TolAngular) const
747{
748
749 Standard_Integer jj;
750 GeomAbs_Shape cont_jj;
7fd59977 751 GeomAbs_Shape cont = GeomAbs_C0;
7fd59977 752
753 for (jj=1; jj<=myShapes.Length(); jj++) {
754
755 TopoDS_Edge Edge1, Edge2;
756 if ( (Index==0) || (Index==myEdges->ColLength()) ) {
0d969553 757 if (!uclosed) return GeomAbs_C0; //The least possible error
7fd59977 758
759 Edge1 = TopoDS::Edge (myEdges->Value(myEdges->ColLength(),jj));
760 Edge2 = TopoDS::Edge (myEdges->Value(1,jj));
761 }
762 else {
763 Edge1 = TopoDS::Edge (myEdges->Value(Index,jj));
764 Edge2 = TopoDS::Edge (myEdges->Value(Index+1,jj));
765 }
766
767 TopoDS_Vertex V1,V2;
768 if ( Edge1.Orientation() == TopAbs_REVERSED) {
769 V1 = TopExp::FirstVertex(Edge1);
770 }
771 else {
772 V1 = TopExp::LastVertex(Edge1);
773 }
774 if ( Edge2.Orientation() == TopAbs_REVERSED) {
775 V2 = TopExp::LastVertex(Edge2);
776 }
777 else {
778 V2 = TopExp::FirstVertex(Edge2);
779 }
780
781 if (BRep_Tool::Degenerated(Edge1) || BRep_Tool::Degenerated(Edge2))
782 cont_jj = GeomAbs_CN;
783 else
784 {
785 Standard_Real U1 = BRep_Tool::Parameter(V1,Edge1);
786 Standard_Real U2 = BRep_Tool::Parameter(V2,Edge2);
787 BRepAdaptor_Curve Curve1(Edge1);
788 BRepAdaptor_Curve Curve2(Edge2);
789 Standard_Real Eps = BRep_Tool::Tolerance(V2) +
790 BRep_Tool::Tolerance(V1);
791 cont_jj = BRepLProp::Continuity(Curve1,Curve2,U1,U2, Eps, TolAngular);
792 }
793
794 if (jj==1) cont = cont_jj;
795 if (cont>cont_jj) cont = cont_jj;
796
797 }
798
799 return cont;
800}
801
802//=======================================================================
803//function : D0
804//purpose :
805//=======================================================================
806 void BRepFill_NSections::D0(const Standard_Real V, TopoDS_Shape& S)
807{
808 TopoDS_Wire W;
809 BRepLib_MakeWire MW;
810 Standard_Integer ii, NbEdge = myLaws->Length();
811 for (ii=1; ii<=NbEdge ; ii++) {
812 Handle(Geom_BSplineCurve) Curve
813 = Handle(Geom_BSplineCurve)::DownCast(myLaws->Value(ii)->BSplineSurface()->VIso(V));
814 Standard_Real first = Curve ->FirstParameter(),
815 last = Curve ->LastParameter();
816 TopoDS_Edge E = BRepLib_MakeEdge(Curve,first,last);
817 MW.Add(E);
818 }
819 TopAbs_Orientation Orien = TopAbs_FORWARD;
820 TopoDS_Shape aLocalShape = MW.Wire().Oriented(Orien);
821 S = TopoDS::Wire(aLocalShape);
822// S = TopoDS::Wire(MW.Wire().Oriented(Orien));
823
824}
825
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