1 // Created on: 1999-04-14
2 // Created by: Roman LYGIN
3 // Copyright (c) 1999-1999 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 <ShapeUpgrade_SplitSurfaceContinuity.ixx>
18 #include <Geom_BSplineSurface.hxx>
19 #include <Precision.hxx>
20 #include <ShapeUpgrade.hxx>
21 #include <TColGeom_HArray2OfSurface.hxx>
22 #include <TColStd_HArray1OfInteger.hxx>
23 #include <Geom_SweptSurface.hxx>
24 #include <TColStd_HSequenceOfReal.hxx>
25 #include <Geom_SurfaceOfRevolution.hxx>
26 #include <ShapeUpgrade_SplitCurve3dContinuity.hxx>
27 #include <Geom_SurfaceOfLinearExtrusion.hxx>
28 #include <TColGeom_HArray1OfCurve.hxx>
30 #include <Geom_RectangularTrimmedSurface.hxx>
31 #include <Geom_OffsetSurface.hxx>
32 #include <ShapeExtend.hxx>
33 //======================================================================
34 //function : ShapeUpgrade_SplitSurface
36 //=======================================================================
38 ShapeUpgrade_SplitSurfaceContinuity::ShapeUpgrade_SplitSurfaceContinuity()
40 myCriterion = GeomAbs_C1;
41 myTolerance = Precision::Confusion();
45 //=======================================================================
46 //function : SetCrierion
48 //=======================================================================
50 void ShapeUpgrade_SplitSurfaceContinuity::SetCriterion(const GeomAbs_Shape Criterion)
52 myCriterion = Criterion;
53 switch (myCriterion) {
55 case GeomAbs_C1 : myCont = 1; break;
56 case GeomAbs_C2 : myCont = 2; break;
57 case GeomAbs_C3 : myCont = 3; break;
58 case GeomAbs_CN : myCont = 4; break;
62 //=======================================================================
63 //function : SetTolerance
65 //=======================================================================
67 void ShapeUpgrade_SplitSurfaceContinuity::SetTolerance(const Standard_Real Tol)
72 //=======================================================================
75 //=======================================================================
77 void ShapeUpgrade_SplitSurfaceContinuity::Compute(const Standard_Boolean Segment)
80 Standard_Real UF,UL,VF,VL;
81 mySurface->Bounds(UF,UL,VF,VL);
82 if(!Precision::IsInfinite(UF)) myUSplitValues->SetValue(1,UF);
83 if(!Precision::IsInfinite(UL)) myUSplitValues->SetValue(myUSplitValues->Length(),UL);
84 if(!Precision::IsInfinite(VF)) myVSplitValues->SetValue(1,VF);
85 if(!Precision::IsInfinite(VL)) myVSplitValues->SetValue(myVSplitValues->Length(),VL);
88 Standard_Real UFirst = myUSplitValues->Value(1);
89 Standard_Real ULast = myUSplitValues->Value(myUSplitValues->Length());
90 Standard_Real VFirst = myVSplitValues->Value(1);
91 Standard_Real VLast = myVSplitValues->Value(myVSplitValues->Length());
92 Standard_Real precision = Precision::Confusion();
93 // if (ShapeUpgrade::Debug()) cout << "SplitSurfaceContinuity::Build" << endl;
94 if(mySurface->Continuity() < myCriterion)
95 myStatus = ShapeExtend::EncodeStatus (ShapeExtend_DONE2);
96 if (myUSplitValues->Length() >2 || myVSplitValues->Length() >2 )
97 myStatus = ShapeExtend::EncodeStatus (ShapeExtend_DONE1);
99 if (mySurface->IsKind(STANDARD_TYPE(Geom_SurfaceOfRevolution))) {
100 Handle(Geom_SurfaceOfRevolution) Surface = Handle(Geom_SurfaceOfRevolution)::DownCast(mySurface);
101 if(Surface->Continuity() >= myCriterion && myUSplitValues->Length() ==2 && myVSplitValues->Length() ==2 ) {
104 Handle(Geom_Curve) BasCurve = Surface->BasisCurve();
105 ShapeUpgrade_SplitCurve3dContinuity spc;
106 spc.Init(BasCurve,VFirst,VLast);
107 spc.SetCriterion(myCriterion);
108 spc.SetTolerance(myTolerance);
109 spc.SetSplitValues(myVSplitValues);
111 myVSplitValues->Clear();
112 myVSplitValues->ChangeSequence() = spc.SplitValues()->Sequence();
113 if ( spc.Status ( ShapeExtend_DONE1 ) )
114 myStatus |= ShapeExtend::EncodeStatus ( ShapeExtend_DONE1 );
115 if ( spc.Status ( ShapeExtend_DONE2 ) )
116 myStatus |= ShapeExtend::EncodeStatus ( ShapeExtend_DONE2 );
117 if ( spc.Status ( ShapeExtend_DONE3 ) )
118 myStatus |= ShapeExtend::EncodeStatus ( ShapeExtend_DONE3 );
121 if (mySurface->IsKind(STANDARD_TYPE(Geom_SurfaceOfLinearExtrusion))) {
122 Handle(Geom_SurfaceOfLinearExtrusion) Surface = Handle(Geom_SurfaceOfLinearExtrusion)::DownCast(mySurface);
123 if(Surface->Continuity() >= myCriterion && myUSplitValues->Length() ==2 && myVSplitValues->Length() == 2) {
126 Handle(Geom_Curve) BasCurve = Surface->BasisCurve();
127 ShapeUpgrade_SplitCurve3dContinuity spc;
128 spc.Init(BasCurve,UFirst,ULast);
129 spc.SetCriterion(myCriterion);
130 spc.SetTolerance(myTolerance);
131 spc.SetSplitValues(myUSplitValues);
133 myUSplitValues->Clear();
134 myUSplitValues->ChangeSequence() = spc.SplitValues()->Sequence();
135 if ( spc.Status ( ShapeExtend_DONE1 ) )
136 myStatus |= ShapeExtend::EncodeStatus ( ShapeExtend_DONE1 );
137 if ( spc.Status ( ShapeExtend_DONE2 ) )
138 myStatus |= ShapeExtend::EncodeStatus ( ShapeExtend_DONE2 );
139 if ( spc.Status ( ShapeExtend_DONE3 ) ) {
140 myStatus |= ShapeExtend::EncodeStatus ( ShapeExtend_DONE3 );
141 Handle(Geom_Curve) aNewBascurve = spc.GetCurve();
142 Surface->SetBasisCurve(aNewBascurve);
147 if (mySurface->IsKind(STANDARD_TYPE(Geom_RectangularTrimmedSurface))) {
148 Handle(Geom_RectangularTrimmedSurface) tmp = Handle(Geom_RectangularTrimmedSurface)::DownCast (mySurface);
149 if(tmp->Continuity() >= myCriterion && myUSplitValues->Length() ==2 && myVSplitValues->Length() == 2) {
152 Standard_Real U1,U2,V1,V2;
153 tmp->Bounds(U1,U2,V1,V2);
154 Handle(Geom_Surface) theSurf = tmp->BasisSurface();
155 ShapeUpgrade_SplitSurfaceContinuity sps;
156 sps.Init(theSurf,Max(U1,UFirst),Min(U2,ULast),Max(V1,VFirst),Min(V2,VLast));
157 sps.SetUSplitValues(myUSplitValues);
158 sps.SetVSplitValues(myVSplitValues);
159 sps.SetTolerance(myTolerance);
160 sps.SetCriterion(myCriterion);
161 sps.Compute(Standard_True);
162 myUSplitValues->Clear();
163 myUSplitValues->ChangeSequence() = sps.USplitValues()->Sequence();
164 myVSplitValues->Clear();
165 myVSplitValues->ChangeSequence() = sps.VSplitValues()->Sequence();
166 myStatus |= sps.myStatus;
169 else if (mySurface->IsKind(STANDARD_TYPE(Geom_OffsetSurface))) {
170 GeomAbs_Shape BasCriterion;
171 switch (myCriterion) {
173 case GeomAbs_C1 : BasCriterion = GeomAbs_C2; break;
174 case GeomAbs_C2 : BasCriterion = GeomAbs_C3; break;
175 case GeomAbs_C3 : //if (ShapeUpgrade::Debug()) cout<<". this criterion is not suitable for a Offset Surface"<<endl;;
176 #ifdef SHAPEUPGRADE_DEB
177 cout << "Warning: ShapeUpgrade_SplitSurfaceContinuity: criterion C3 for Offset surface" << endl;
179 case GeomAbs_CN : BasCriterion = GeomAbs_CN; break;
182 Handle(Geom_OffsetSurface) tmp = Handle(Geom_OffsetSurface)::DownCast (mySurface);
183 Handle(Geom_Surface) theSurf = tmp->BasisSurface();
184 if(theSurf->Continuity() >= BasCriterion && myUSplitValues->Length() ==2 && myVSplitValues->Length() == 2) {
187 ShapeUpgrade_SplitSurfaceContinuity sps;
188 sps.Init(theSurf,UFirst,ULast,VFirst,VLast);
189 sps.SetUSplitValues(myUSplitValues);
190 sps.SetVSplitValues(myVSplitValues);
191 sps.SetTolerance(myTolerance);
192 sps.SetCriterion(BasCriterion);
193 sps.Compute(Standard_True);
194 myUSplitValues->Clear();
195 myUSplitValues->ChangeSequence() = sps.USplitValues()->Sequence();
196 myVSplitValues->Clear();
197 myVSplitValues->ChangeSequence() = sps.VSplitValues()->Sequence();
198 myStatus |= sps.myStatus;
202 Handle(Geom_BSplineSurface) MyBSpline;
203 if(mySurface->IsKind(STANDARD_TYPE(Geom_BSplineSurface)))
204 MyBSpline = Handle(Geom_BSplineSurface)::DownCast(mySurface->Copy());
205 if (MyBSpline.IsNull()) {
206 // if (ShapeUpgrade::Debug()) cout<<". "<<" Surface is not a Bspline"<<endl;
209 if(mySurface->Continuity() >= myCriterion) {
213 // it is a BSplineSurface
214 Standard_Integer UDeg=MyBSpline->UDegree();
215 Standard_Integer VDeg=MyBSpline->VDegree();
216 Standard_Integer NbUKnots= MyBSpline->NbUKnots();
217 Standard_Integer UFirstInd =MyBSpline->FirstUKnotIndex()+1,
218 ULastInd = MyBSpline->LastUKnotIndex()-1,
219 VFirstInd =MyBSpline->FirstVKnotIndex()+1,
220 VLastInd = MyBSpline->LastVKnotIndex()-1;
221 Standard_Integer NbVKnots= MyBSpline->NbVKnots();
223 // if (ShapeUpgrade::Debug()) cout<<". NbUKnots="<<NbUKnots<<endl;
225 // Only the internal knots are checked.
226 Standard_Integer iknot= UFirstInd;
227 for(Standard_Integer j =2; j <= myUSplitValues->Length(); j++) {
228 ULast = myUSplitValues->Value(j);
230 for (; iknot <= ULastInd; iknot++) {
231 Standard_Real valknot = MyBSpline->UKnot(iknot);
232 if(valknot <= UFirst + precision) continue;
233 if( valknot >= ULast - precision) break;
234 Standard_Integer Continuity=UDeg-MyBSpline->UMultiplicity(iknot);
235 if (Continuity < myCont) {
236 // At this knot, the Surface is C0; try to remove Knot.
237 Standard_Integer newMultiplicity=UDeg - myCont;
238 Standard_Boolean corrected = Standard_False;
239 if ( newMultiplicity >= 0 )
240 corrected=MyBSpline->RemoveUKnot(iknot, newMultiplicity, myTolerance);
241 if (corrected && newMultiplicity > 0) {
242 Continuity=UDeg-MyBSpline->UMultiplicity(iknot);
243 corrected = (Continuity >= myCont);
246 // at this knot, the continuity is now C1. Nothing else to do.
247 // if (ShapeUpgrade::Debug()) cout<<". Correction at UKnot "<<iknot<<endl;
248 // PTV 15.05.2002 decrease iknot and ULastIndex values if knot removed
249 if (newMultiplicity ==0) { iknot--; ULastInd--; }
250 myStatus |= ShapeExtend::EncodeStatus ( ShapeExtend_DONE3 );
253 // impossible to force C1 within the tolerance:
254 // this knot will be a splitting value.
255 Standard_Real u=MyBSpline->UKnot(iknot);
256 myUSplitValues->InsertBefore(j++,u);
258 // if (ShapeUpgrade::Debug()) cout<<". Splitting at Knot "<<iknot<<endl;
265 // if (ShapeUpgrade::Debug()) cout<<". NbVKnots="<<NbVKnots<<endl;
267 // Only the internal knots are checked.
268 Standard_Integer iknot=VFirstInd;
269 for(Standard_Integer j1 =2; j1 <= myVSplitValues->Length(); j1++) {
270 VLast = myVSplitValues->Value(j1);
271 for (; iknot <= VLastInd; iknot++) {
272 Standard_Real valknot = MyBSpline->VKnot(iknot);
273 if(valknot <= VFirst + precision) continue;
274 if( valknot >= VLast - precision) break;
275 Standard_Integer Continuity=VDeg-MyBSpline->VMultiplicity(iknot);
276 if (Continuity < myCont) {
277 // At this knot, the Surface is C0; try to remove Knot.
278 Standard_Integer newMultiplicity=VDeg - myCont;
279 Standard_Boolean corrected = Standard_False;
280 if( newMultiplicity >= 0 )
281 corrected=MyBSpline->RemoveVKnot(iknot, newMultiplicity, myTolerance);
282 if (corrected && newMultiplicity > 0) {
283 Continuity=VDeg-MyBSpline->VMultiplicity(iknot);
284 corrected = (Continuity >= myCont);
287 // at this knot, the continuity is now Criterion. Nothing else to do.
288 // if (ShapeUpgrade::Debug()) cout<<". Correction at VKnot "<<iknot<<endl;
289 // PTV 15.05.2002 decrease iknot and ULastIndex values if knot removed
290 if (newMultiplicity ==0) { iknot--; VLastInd--; }
291 myStatus |= ShapeExtend::EncodeStatus ( ShapeExtend_DONE3 );
294 // this knot will be a splitting value.
295 Standard_Real v=MyBSpline->VKnot(iknot);
296 myVSplitValues->InsertBefore(j1++,v);
298 // if (ShapeUpgrade::Debug()) cout<<". Splitting at Knot "<<iknot<<endl;
305 if ( Status ( ShapeExtend_DONE3 ) ) {
306 mySurface = MyBSpline;
309 if (myUSplitValues->Length() >2 || myVSplitValues->Length() >2 )
310 myStatus |= ShapeExtend::EncodeStatus (ShapeExtend_DONE1);