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d5f74e42d6
License statement text corrected; compiler warnings caused by Bison 2.41 disabled for MSVC; a few other compiler warnings on 54-bit Windows eliminated by appropriate type cast Wrong license statements corrected in several files. Copyright and license statements added in XSD and GLSL files. Copyright year updated in some files. Obsolete documentation files removed from DrawResources.
193 lines
7.0 KiB
C++
193 lines
7.0 KiB
C++
// Created on: 1999-04-14
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// Created by: Roman LYGIN
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// Copyright (c) 1999-1999 Matra Datavision
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// Copyright (c) 1999-2014 OPEN CASCADE SAS
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//
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// This file is part of Open CASCADE Technology software library.
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//
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// This library is free software; you can redistribute it and/or modify it under
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// the terms of the GNU Lesser General Public License version 2.1 as published
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// by the Free Software Foundation, with special exception defined in the file
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// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
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// distribution for complete text of the license and disclaimer of any warranty.
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//
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// Alternatively, this file may be used under the terms of Open CASCADE
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// commercial license or contractual agreement.
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#include <ShapeUpgrade_SplitCurve2dContinuity.ixx>
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#include <Standard_ErrorHandler.hxx>
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#include <Standard_Failure.hxx>
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#include <Geom2d_BSplineCurve.hxx>
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#include <Precision.hxx>
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#include <ShapeUpgrade.hxx>
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#include <Geom2d_TrimmedCurve.hxx>
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#include <Geom2d_OffsetCurve.hxx>
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#include <TColGeom2d_HArray1OfCurve.hxx>
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#include <TColStd_HSequenceOfReal.hxx>
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#include <TColGeom2d_HArray1OfCurve.hxx>
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#include <ShapeExtend.hxx>
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//=======================================================================
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//function : ShapeUpgrade_SplitCurve2dContinuity
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//purpose :
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//=======================================================================
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ShapeUpgrade_SplitCurve2dContinuity::ShapeUpgrade_SplitCurve2dContinuity()
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{
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myCriterion = GeomAbs_C1;
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myTolerance = Precision::PConfusion();
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myCont =1;
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}
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//=======================================================================
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//function : SetCriterion
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//purpose :
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//=======================================================================
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void ShapeUpgrade_SplitCurve2dContinuity::SetCriterion(const GeomAbs_Shape Criterion)
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{
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myCriterion = Criterion;
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switch (myCriterion) {
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case GeomAbs_C0 : myCont = 0; break;
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case GeomAbs_C1 : myCont = 1; break;
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case GeomAbs_C2 : myCont = 2; break;
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case GeomAbs_C3 : myCont = 3; break;
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case GeomAbs_CN : myCont = 4; break;
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default : myCont = 1;
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}
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}
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//=======================================================================
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//function : SetTolerance
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//purpose :
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//=======================================================================
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void ShapeUpgrade_SplitCurve2dContinuity::SetTolerance(const Standard_Real Tol)
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{
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myTolerance = Tol;
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}
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//=======================================================================
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//function : Compute
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//purpose :
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//=======================================================================
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void ShapeUpgrade_SplitCurve2dContinuity::Compute()
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{
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if(myCurve->Continuity() < myCriterion)
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myStatus = ShapeExtend::EncodeStatus (ShapeExtend_DONE2);
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if (mySplitValues->Length() > 2)
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myStatus = ShapeExtend::EncodeStatus (ShapeExtend_DONE1);
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Standard_Real precision = Precision::PConfusion();
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Standard_Real First = mySplitValues->Value(1);
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Standard_Real Last = mySplitValues->Value(mySplitValues->Length());
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if (myCurve->IsKind(STANDARD_TYPE(Geom2d_TrimmedCurve))) {
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Handle(Geom2d_TrimmedCurve) tmp = Handle(Geom2d_TrimmedCurve)::DownCast (myCurve);
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Handle(Geom2d_Curve) BasCurve = tmp->BasisCurve();
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ShapeUpgrade_SplitCurve2dContinuity spc;
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// spc.Init(BasCurve,Max(First,tmp->FirstParameter()),Min(Last,tmp->LastParameter()));
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spc.Init(BasCurve,First,Last);
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spc.SetSplitValues(mySplitValues);
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spc.SetTolerance(myTolerance);
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spc.SetCriterion(myCriterion);
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spc.Compute();
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mySplitValues->Clear();
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mySplitValues->ChangeSequence() = spc.SplitValues()->Sequence();
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//mySplitValues = spc.SplitValues();
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myStatus |= spc.myStatus;
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return;
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}
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else if (myCurve->IsKind(STANDARD_TYPE(Geom2d_OffsetCurve))) {
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GeomAbs_Shape BasCriterion;
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switch (myCriterion) {
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default :
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case GeomAbs_C1 : BasCriterion = GeomAbs_C2; break;
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case GeomAbs_C2 : BasCriterion = GeomAbs_C3; break;
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case GeomAbs_C3 : //if (ShapeUpgrade::Debug()) cout<<". this criterion is not suitable for a Offset curve"<<endl;
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#ifdef DEB
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cout << "Warning: ShapeUpgrade_SplitCurve2dContinuity: criterion C3 for Offset curve" << endl;
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#endif
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case GeomAbs_CN : BasCriterion = GeomAbs_CN; break;
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}
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Handle(Geom2d_OffsetCurve) tmp = Handle(Geom2d_OffsetCurve)::DownCast (myCurve);
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Handle(Geom2d_Curve) BasCurve = tmp->BasisCurve();
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//Standard_Real Offset = tmp->Offset(); // Offset not used (skl)
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ShapeUpgrade_SplitCurve2dContinuity spc;
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// spc.Init(BasCurve,Max(tmp->FirstParameter(),First),Min(tmp->LastParameter(),Last));
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spc.Init(BasCurve,First,Last);
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spc.SetSplitValues(mySplitValues);
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spc.SetTolerance(myTolerance);
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spc.SetCriterion(BasCriterion);
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spc.Compute();
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mySplitValues->Clear();
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mySplitValues->ChangeSequence() = spc.SplitValues()->Sequence();
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myStatus |= spc.myStatus;
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return;
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}
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Handle(Geom2d_BSplineCurve) MyBSpline = Handle(Geom2d_BSplineCurve)::DownCast (myCurve);
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if (MyBSpline.IsNull()) {
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// if (ShapeUpgrade::Debug()) cout<<". curve is not a Bspline"<<endl;
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return;
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}
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myNbCurves=1;
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Standard_Integer Deg=MyBSpline->Degree();
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Standard_Integer NbKnots= MyBSpline->NbKnots();
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// if (ShapeUpgrade::Debug()) cout<<". NbKnots="<<NbKnots<<endl;
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if (NbKnots <= 2) {
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return;
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}
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Standard_Integer FirstInd =MyBSpline->FirstUKnotIndex()+1,
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LastInd = MyBSpline->LastUKnotIndex()-1;
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Standard_Integer iknot = FirstInd;
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for(Standard_Integer j =2; j <= mySplitValues->Length(); j++) {
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Last = mySplitValues->Value(j);
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for (; iknot <= LastInd; iknot++) {
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Standard_Real valknot = MyBSpline->Knot(iknot);
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if(valknot <= First + precision) continue;
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if(valknot >= Last - precision) break;
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Standard_Integer Continuity=Deg-MyBSpline->Multiplicity(iknot);
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//Standard_Real tt = MyBSpline->Knot(iknot); // tt not used (skl)
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if (Continuity < myCont) {
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// At this knot, the curve is C0; try to remove Knot.
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Standard_Boolean corrected = Standard_False;
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Standard_Integer newMultiplicity = Deg - myCont;
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if (newMultiplicity < 0) newMultiplicity = 0;
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{
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try {
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OCC_CATCH_SIGNALS
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corrected = MyBSpline->RemoveKnot(iknot, newMultiplicity, myTolerance);
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}
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catch (Standard_Failure) {
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corrected = Standard_False;
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}
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}
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if (corrected && newMultiplicity > 0) {
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Continuity=Deg-MyBSpline->Multiplicity(iknot);
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corrected = (Continuity >= myCont);
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}
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if (corrected) {
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// at this knot, the continuity is now C1. Nothing else to do.
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// if (ShapeUpgrade::Debug()) cout<<". Correction at Knot "<<iknot<<endl;
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myStatus |= ShapeExtend::EncodeStatus ( ShapeExtend_DONE3 );
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}
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else {
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// impossible to force C1 within the tolerance:
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// this knot will be a splitting value.
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mySplitValues->InsertBefore(j++,MyBSpline->Knot(iknot));
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myNbCurves++;
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// if (ShapeUpgrade::Debug()) cout<<". Splitting at Knot "<<iknot<<endl;
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}
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}
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}
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First = Last;
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}
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if (mySplitValues->Length() > 2)
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myStatus = ShapeExtend::EncodeStatus (ShapeExtend_DONE1);
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}
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