mirror of
https://git.salome-platform.org/gitpub/modules/geom.git
synced 2024-09-22 18:52:52 +05:00
Methods 'CurveCreator_Utils::constructShape' and
'Sketcher_Utils::MakeInterpolation' were changed to interpolate each spline section by the cubic B-spline passing through the control points that the tangent vector in each control point P is calculated by the following way: - if point P is preceded by a control point A and is followed by a control point B then the tangent vector is equal to (P - A) / |P - A| + (B - P) / |B - P|; - if point P is preceded by a control point A but is not followed by any control point then the tangent vector is equal to P - A; - if point P is followed by a control point B but is not preceded by any control point then the tangent vector is equal to B - P.
This commit is contained in:
abk
parent
047d8bf632
commit
c3778fc96e
@ -183,116 +183,168 @@ gp_Pnt CurveCreator_Utils::ConvertClickToPoint( int x, int y, Handle(V3d_View) a
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return ResultPoint;
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}
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void CurveCreator_Utils::constructShape( const CurveCreator_ICurve* theCurve,
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TopoDS_Shape& theShape )
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//=======================================================================
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// function : constructBSpline
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// purpose :
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// The algorithm builds the cubic B-spline passing through the points that the
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// tangent vector in each given point P is calculated by the following way:
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// if point P is preceded by a point A and is followed by a point B then
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// the tangent vector is equal to (P - A) / |P - A| + (B - P) / |B - P|;
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// if point P is preceded by a point A but is not followed by any point then
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// the tangent vector is equal to P - A;
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// if point P is followed by a point B but is not preceded by any point then
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// the tangent vector is equal to B - P.
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//=======================================================================
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static bool constructBSpline(
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const Handle(TColgp_HArray1OfPnt)& thePoints,
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const Standard_Boolean theIsClosed,
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Handle(Geom_BSplineCurve)& theBSpline)
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{
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const int aPointCount = thePoints->Length();
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if (aPointCount <= 1)
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{
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return false;
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}
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// Calculate the tangents.
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TColgp_Array1OfVec aTangents(1, aPointCount);
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Handle(TColStd_HArray1OfBoolean) aTangentFlags =
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new TColStd_HArray1OfBoolean(1, aPointCount);
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GeomAPI_Interpolate aInterpolator(thePoints, theIsClosed, 0);
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if (aPointCount == 2)
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{
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aTangentFlags->SetValue(1, Standard_False);
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aTangentFlags->SetValue(2, Standard_False);
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}
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else
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{
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for (Standard_Integer aPN = 1; aPN <= aPointCount; ++aPN)
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{
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gp_Vec aTangent;
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if (aPN != 1 || theIsClosed)
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{
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const Standard_Integer aPN1 = (aPN != 1) ? (aPN - 1) : aPointCount;
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aTangent = gp_Vec(thePoints->Value(aPN1),
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thePoints->Value(aPN)).Normalized();
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}
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if (aPN < aPointCount || theIsClosed)
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{
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const Standard_Integer aPN2 = (aPN != aPointCount) ? (aPN + 1) : 1;
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const gp_Vec aTangent2 = aTangent +
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gp_Vec(thePoints->Value(aPN), thePoints->Value(aPN2)).Normalized();
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if (aTangent2.SquareMagnitude() >= Precision::SquareConfusion())
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{
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aTangent = aTangent2.Normalized();
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}
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else
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{
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aTangent = -aTangent;
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}
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}
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aTangents.SetValue(aPN, aTangent);
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aTangentFlags->SetValue(aPN, Standard_True);
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}
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}
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// Interpolate.
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aInterpolator.Load(aTangents, aTangentFlags, Standard_False);
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aInterpolator.Perform();
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const bool aResult = (aInterpolator.IsDone() == Standard_True);
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if (aResult)
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{
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theBSpline = aInterpolator.Curve();
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}
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return aResult;
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}
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//=======================================================================
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// function : constructShape
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// purpose :
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//=======================================================================
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void CurveCreator_Utils::constructShape(
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const CurveCreator_ICurve* theCurve, TopoDS_Shape& theShape)
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{
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BRep_Builder aBuilder;
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TopoDS_Compound aComp;
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aBuilder.MakeCompound( aComp );
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for( int iSection = 0 ; iSection < theCurve->getNbSections() ; iSection++ )
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TopoDS_Compound aShape;
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aBuilder.MakeCompound(aShape);
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const int aSectionCount = theCurve->getNbSections();
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for (int aSectionI = 0; aSectionI < aSectionCount; ++aSectionI)
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{
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const int aTmpPointCount = theCurve->getNbPoints(aSectionI);
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if (aTmpPointCount == 0)
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{
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int theISection = iSection;
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CurveCreator::SectionType aSectType = theCurve->getSectionType( theISection );
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int aPointSize = theCurve->getNbPoints( theISection );
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if ( aPointSize == 0 )
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continue;
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bool aSectIsClosed = theCurve->isClosed( theISection );
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bool isPolyline = aSectType == CurveCreator::Polyline;
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int iPoint = 0;
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gp_Pnt aPrevPoint, aPoint;
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// filters the curve points to skip equal points
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std::vector<gp_Pnt> aPoints;
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CurveCreator_UtilsICurve::getPoint( theCurve, theISection, iPoint, aPoint );
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aPoints.push_back( aPoint );
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aPrevPoint = aPoint;
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iPoint++;
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for( ; iPoint < aPointSize; iPoint++ ) {
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CurveCreator_UtilsICurve::getPoint( theCurve, theISection, iPoint, aPoint );
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if ( !isEqualPoints( aPrevPoint, aPoint ) )
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aPoints.push_back( aPoint );
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aPrevPoint = aPoint;
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}
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int aNbPoints = aPoints.size();
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if ( aNbPoints == 1 ) {
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aPoint = aPoints.front();
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TopoDS_Vertex aVertex = BRepBuilderAPI_MakeVertex( aPoint ).Vertex();
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aBuilder.Add( aComp, aVertex );
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}
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else if ( aNbPoints > 1 ) {
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Handle(TColgp_HArray1OfPnt) aHCurvePoints = new TColgp_HArray1OfPnt(1, aNbPoints);
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TColgp_Array1OfVec aTangents(1, aNbPoints);
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Handle(TColStd_HArray1OfBoolean) aTangentFlags = new TColStd_HArray1OfBoolean(1, aNbPoints);
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gp_Vec aNullVec(0, 0, 0);
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TopoDS_Edge aPointEdge;
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TopoDS_Vertex aVertex;
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std::vector<gp_Pnt>::const_iterator aPointIt = aPoints.begin(), aPointLast = aPoints.end();
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aPoint = *aPointIt;
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int aHIndex = 1;
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aVertex = BRepBuilderAPI_MakeVertex( aPoint ).Vertex();
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aBuilder.Add( aComp, aVertex );
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if ( !isPolyline ) {
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aHCurvePoints->SetValue( aHIndex, aPoint );
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aTangents.SetValue( aHIndex, aNullVec );
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aTangentFlags->SetValue( aHIndex, Standard_False );
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aHIndex++;
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}
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aPrevPoint = aPoint;
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aPointIt++;
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for( ; aPointIt != aPointLast; aPointIt++ ) {
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aPoint = *aPointIt;
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aVertex = BRepBuilderAPI_MakeVertex( aPoint ).Vertex();
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aBuilder.Add( aComp, aVertex );
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if ( isPolyline ) {
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TopoDS_Edge aPointEdge = BRepBuilderAPI_MakeEdge( aPrevPoint, aPoint ).Edge();
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aBuilder.Add( aComp, aPointEdge );
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}
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else {
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aHCurvePoints->SetValue( aHIndex, aPoint );
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aTangents.SetValue( aHIndex, aNullVec );
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aTangentFlags->SetValue( aHIndex, Standard_False );
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aHIndex++;
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}
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aPrevPoint = aPoint;
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}
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if( aSectIsClosed && ( aNbPoints > 2 ) ) {
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aPoint = aPoints.front();
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aVertex = BRepBuilderAPI_MakeVertex( aPoint ).Vertex();
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aBuilder.Add( aComp, aVertex );
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if ( isPolyline ) {
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aPointEdge = BRepBuilderAPI_MakeEdge( aPrevPoint, aPoint ).Edge();
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aBuilder.Add( aComp, aPointEdge );
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// Get the different points.
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std::vector<gp_Pnt> aTmpPoints;
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gp_Pnt aFirstPoint;
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CurveCreator_UtilsICurve::getPoint(theCurve, aSectionI, 0, aFirstPoint);
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gp_Pnt aPoint = aFirstPoint;
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aTmpPoints.push_back(aPoint);
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for (int aPI = 1; aPI < aTmpPointCount; ++aPI)
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{
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gp_Pnt aPoint2;
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CurveCreator_UtilsICurve::getPoint(theCurve, aSectionI, aPI, aPoint2);
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if (!isEqualPoints(aPoint, aPoint2))
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{
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aPoint = aPoint2;
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aTmpPoints.push_back(aPoint);
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}
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}
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if( !isPolyline ) {
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// compute BSpline
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Handle(Geom_BSplineCurve) aBSplineCurve;
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GeomAPI_Interpolate aGBC(aHCurvePoints, aSectIsClosed, gp::Resolution());
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// correct the spline degree to be as 3 for non-periodic spline if number of points
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// less than 3. It is need to have a knot in each spline point. This knots are used
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// to found a neighbour points when a new point is inserted between two existing.
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if (!aSectIsClosed ) {
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if (aHCurvePoints->Length() == 3)
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aGBC.Load(aTangents, aTangentFlags);
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const bool isClosed = theCurve->isClosed(aSectionI);
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int aPointCount = aTmpPoints.size();
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if (isClosed)
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{
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while (aPointCount > 1 &&
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isEqualPoints(aFirstPoint, aTmpPoints[aPointCount - 1]))
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{
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--aPointCount;
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}
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}
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aGBC.Perform();
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if ( aGBC.IsDone() )
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aBSplineCurve = aGBC.Curve();
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TopoDS_Edge anEdge = BRepBuilderAPI_MakeEdge( aBSplineCurve ).Edge();
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TopoDS_Wire aWire = BRepBuilderAPI_MakeWire( anEdge ).Wire();
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aBuilder.Add( aComp, aWire );
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// Add the vertices to the shape.
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Handle(TColgp_HArray1OfPnt) aPoints =
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new TColgp_HArray1OfPnt(1, aPointCount);
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for (Standard_Integer aPI = 0; aPI < aPointCount; ++aPI)
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{
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aPoints->SetValue(aPI + 1, aTmpPoints[aPI]);
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aBuilder.Add(aShape, BRepBuilderAPI_MakeVertex(aTmpPoints[aPI]));
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}
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if (aPointCount == 1)
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{
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continue;
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}
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// Add the edges to the shape.
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const bool isPolyline =
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(theCurve->getSectionType(aSectionI) == CurveCreator::Polyline);
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if (isPolyline)
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{
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for (Standard_Integer aPN = 1; aPN < aPointCount; ++aPN)
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{
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aBuilder.Add(aShape, BRepBuilderAPI_MakeEdge(
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BRepBuilderAPI_MakeVertex(aPoints->Value(aPN)),
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BRepBuilderAPI_MakeVertex(aPoints->Value(aPN + 1))));
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}
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if (isClosed)
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{
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aBuilder.Add(aShape, BRepBuilderAPI_MakeEdge(
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BRepBuilderAPI_MakeVertex(aPoints->Value(aPointCount)),
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BRepBuilderAPI_MakeVertex(aPoints->Value(1))));
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}
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}
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else
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{
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Handle(Geom_BSplineCurve) aBSpline;
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if (constructBSpline(aPoints, isClosed, aBSpline))
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{
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aBuilder.Add(aShape,
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BRepBuilderAPI_MakeWire(BRepBuilderAPI_MakeEdge(aBSpline)));
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}
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}
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}
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theShape = aComp;
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theShape = aShape;
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}
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/**
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@ -32,7 +32,9 @@
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#include <BRepBuilderAPI_MakeWire.hxx>
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#include <ElSLib.hxx>
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#include <GeomAPI_Interpolate.hxx>
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#include <TColgp_Array1OfVec.hxx>
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#include <TColgp_HArray1OfPnt.hxx>
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#include <TColStd_HArray1OfBoolean.hxx>
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#include <TopoDS_Wire.hxx>
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const double POINT_CONFUSION_TOLERANCE = 0.0001;
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@ -97,58 +99,135 @@ TopoDS_Shape Sketcher_Utils::MakePolyline
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return aResult;
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}
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//=======================================================================
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// function : constructBSpline
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// purpose : See function 'constructBSpline' in file 'CurveCreator_Utils.cxx'.
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//=======================================================================
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static bool constructBSpline(
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const Handle(TColgp_HArray1OfPnt)& thePoints,
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const Standard_Boolean theIsClosed,
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Handle(Geom_BSplineCurve)& theBSpline)
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{
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const int aPointCount = thePoints->Length();
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if (aPointCount <= 1)
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{
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return false;
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}
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// Calculate the tangents.
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TColgp_Array1OfVec aTangents(1, aPointCount);
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Handle(TColStd_HArray1OfBoolean) aTangentFlags =
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new TColStd_HArray1OfBoolean(1, aPointCount);
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GeomAPI_Interpolate aInterpolator(thePoints, theIsClosed, 0);
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if (aPointCount == 2)
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{
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aTangentFlags->SetValue(1, Standard_False);
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aTangentFlags->SetValue(2, Standard_False);
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}
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else
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{
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for (Standard_Integer aPN = 1; aPN <= aPointCount; ++aPN)
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{
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gp_Vec aTangent;
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if (aPN != 1 || theIsClosed)
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{
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const Standard_Integer aPN1 = (aPN != 1) ? (aPN - 1) : aPointCount;
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aTangent = gp_Vec(thePoints->Value(aPN1),
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thePoints->Value(aPN)).Normalized();
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}
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if (aPN < aPointCount || theIsClosed)
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{
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const Standard_Integer aPN2 = (aPN != aPointCount) ? (aPN + 1) : 1;
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const gp_Vec aTangent2 = aTangent +
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gp_Vec(thePoints->Value(aPN), thePoints->Value(aPN2)).Normalized();
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if (aTangent2.SquareMagnitude() >= Precision::SquareConfusion())
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{
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aTangent = aTangent2.Normalized();
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}
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else
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{
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aTangent = -aTangent;
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}
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}
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aTangents.SetValue(aPN, aTangent);
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aTangentFlags->SetValue(aPN, Standard_True);
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}
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}
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// Interpolate.
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aInterpolator.Load(aTangents, aTangentFlags, Standard_False);
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aInterpolator.Perform();
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const bool aResult = (aInterpolator.IsDone() == Standard_True);
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if (aResult)
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{
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theBSpline = aInterpolator.Curve();
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}
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return aResult;
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}
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//=======================================================================
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// function : MakeInterpolation
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// purpose :
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//=======================================================================
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TopoDS_Shape Sketcher_Utils::MakeInterpolation
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(const std::list <double> &theCoords2D,
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const Standard_Boolean IsClosed,
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const gp_Ax3 &thePlane)
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TopoDS_Shape Sketcher_Utils::MakeInterpolation(
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const std::list<double>& theCoords2D,
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const Standard_Boolean theIsClosed,
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const gp_Ax3& thePlane)
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{
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std::list <gp_Pnt> aPoints;
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TopoDS_Shape aResult;
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if (theCoords2D.size() == 0)
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{
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return TopoDS_Shape();
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}
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To3D(theCoords2D, thePlane, aPoints);
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Standard_Integer aNbPnts = aPoints.size();
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if (aNbPnts > 1) {
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if (IsClosed &&
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aPoints.front().IsEqual(aPoints.back(), POINT_CONFUSION_TOLERANCE)) {
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// The polyline should be closed, first and last points are confused.
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// Remove the last point.
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aPoints.pop_back();
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--aNbPnts;
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// Get the different points.
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std::list<gp_Pnt> aTmpPoints;
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To3D(theCoords2D, thePlane, aTmpPoints);
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gp_Pnt aFirstPoint = aTmpPoints.front();
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gp_Pnt aPoint = aFirstPoint;
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std::list<gp_Pnt>::iterator aPIt = aTmpPoints.begin();
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for (++aPIt; aPIt != aTmpPoints.cend();)
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{
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const gp_Pnt aPoint2 = *aPIt;
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if (!aPoint.IsEqual(aPoint2, POINT_CONFUSION_TOLERANCE))
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{
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aPoint = aPoint2;
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++aPIt;
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}
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else
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{
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aTmpPoints.erase(aPIt);
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}
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}
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if (theIsClosed)
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{
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while (--aPIt != aTmpPoints.cbegin() &&
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aFirstPoint.IsEqual(*aPIt, POINT_CONFUSION_TOLERANCE))
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{
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aTmpPoints.erase(aPIt);
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}
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}
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if (aNbPnts == 1) {
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// The result is vertex.
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aResult = BRepBuilderAPI_MakeVertex(aPoints.front()).Vertex();
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} else if (aNbPnts > 1) {
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std::list <gp_Pnt>::const_iterator anIter = aPoints.begin();
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Handle(TColgp_HArray1OfPnt) aHCurvePoints =
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new TColgp_HArray1OfPnt(1, aNbPnts);
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Standard_Integer i;
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for (i = 1; anIter != aPoints.end(); ++anIter, ++i) {
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aHCurvePoints->SetValue(i, *anIter);
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// Process the single point case.
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const int aPointCount = aTmpPoints.size();
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if (aPointCount == 1)
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{
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return BRepBuilderAPI_MakeVertex(aTmpPoints.front());
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}
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// Compute BSpline
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Standard_Real aTol = Precision::Confusion();
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GeomAPI_Interpolate aGBC(aHCurvePoints, IsClosed, aTol);
|
||||
|
||||
aGBC.Perform();
|
||||
|
||||
if (aGBC.IsDone()) {
|
||||
TopoDS_Edge anEdge = BRepBuilderAPI_MakeEdge(aGBC.Curve()).Edge();
|
||||
aResult = BRepBuilderAPI_MakeWire(anEdge).Wire();
|
||||
// Process the other cases.
|
||||
Handle(TColgp_HArray1OfPnt) aPoints =
|
||||
new TColgp_HArray1OfPnt(1, aPointCount);
|
||||
aPIt = aTmpPoints.begin();
|
||||
for (Standard_Integer aPN = 1; aPIt != aTmpPoints.cend(); ++aPIt, ++aPN)
|
||||
{
|
||||
aPoints->SetValue(aPN, *aPIt);
|
||||
}
|
||||
Handle(Geom_BSplineCurve) aBSpline;
|
||||
if (constructBSpline(aPoints, theIsClosed, aBSpline))
|
||||
{
|
||||
return BRepBuilderAPI_MakeWire(BRepBuilderAPI_MakeEdge(aBSpline));
|
||||
}
|
||||
|
||||
return aResult;
|
||||
return TopoDS_Shape();
|
||||
}
|
||||
|
||||
//=======================================================================
|
||||
|
||||
Loading…
Reference in New Issue
Block a user