mirror of
https://git.salome-platform.org/gitpub/modules/geom.git
synced 2024-12-26 17:30:35 +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
|
||||
return ResultPoint;
|
||||
}
|
||||
|
||||
void CurveCreator_Utils::constructShape( const CurveCreator_ICurve* theCurve,
|
||||
TopoDS_Shape& theShape )
|
||||
//=======================================================================
|
||||
// function : constructBSpline
|
||||
// purpose :
|
||||
// The algorithm builds the cubic B-spline passing through the points that the
|
||||
// tangent vector in each given point P is calculated by the following way:
|
||||
// if point P is preceded by a point A and is followed by a point B then
|
||||
// the tangent vector is equal to (P - A) / |P - A| + (B - P) / |B - P|;
|
||||
// if point P is preceded by a point A but is not followed by any point then
|
||||
// the tangent vector is equal to P - A;
|
||||
// if point P is followed by a point B but is not preceded by any point then
|
||||
// the tangent vector is equal to B - P.
|
||||
//=======================================================================
|
||||
static bool constructBSpline(
|
||||
const Handle(TColgp_HArray1OfPnt)& thePoints,
|
||||
const Standard_Boolean theIsClosed,
|
||||
Handle(Geom_BSplineCurve)& theBSpline)
|
||||
{
|
||||
const int aPointCount = thePoints->Length();
|
||||
if (aPointCount <= 1)
|
||||
{
|
||||
return false;
|
||||
}
|
||||
|
||||
// Calculate the tangents.
|
||||
TColgp_Array1OfVec aTangents(1, aPointCount);
|
||||
Handle(TColStd_HArray1OfBoolean) aTangentFlags =
|
||||
new TColStd_HArray1OfBoolean(1, aPointCount);
|
||||
GeomAPI_Interpolate aInterpolator(thePoints, theIsClosed, 0);
|
||||
if (aPointCount == 2)
|
||||
{
|
||||
aTangentFlags->SetValue(1, Standard_False);
|
||||
aTangentFlags->SetValue(2, Standard_False);
|
||||
}
|
||||
else
|
||||
{
|
||||
for (Standard_Integer aPN = 1; aPN <= aPointCount; ++aPN)
|
||||
{
|
||||
gp_Vec aTangent;
|
||||
if (aPN != 1 || theIsClosed)
|
||||
{
|
||||
const Standard_Integer aPN1 = (aPN != 1) ? (aPN - 1) : aPointCount;
|
||||
aTangent = gp_Vec(thePoints->Value(aPN1),
|
||||
thePoints->Value(aPN)).Normalized();
|
||||
}
|
||||
if (aPN < aPointCount || theIsClosed)
|
||||
{
|
||||
const Standard_Integer aPN2 = (aPN != aPointCount) ? (aPN + 1) : 1;
|
||||
const gp_Vec aTangent2 = aTangent +
|
||||
gp_Vec(thePoints->Value(aPN), thePoints->Value(aPN2)).Normalized();
|
||||
if (aTangent2.SquareMagnitude() >= Precision::SquareConfusion())
|
||||
{
|
||||
aTangent = aTangent2.Normalized();
|
||||
}
|
||||
else
|
||||
{
|
||||
aTangent = -aTangent;
|
||||
}
|
||||
}
|
||||
aTangents.SetValue(aPN, aTangent);
|
||||
aTangentFlags->SetValue(aPN, Standard_True);
|
||||
}
|
||||
}
|
||||
|
||||
// Interpolate.
|
||||
aInterpolator.Load(aTangents, aTangentFlags, Standard_False);
|
||||
aInterpolator.Perform();
|
||||
const bool aResult = (aInterpolator.IsDone() == Standard_True);
|
||||
if (aResult)
|
||||
{
|
||||
theBSpline = aInterpolator.Curve();
|
||||
}
|
||||
return aResult;
|
||||
}
|
||||
|
||||
//=======================================================================
|
||||
// function : constructShape
|
||||
// purpose :
|
||||
//=======================================================================
|
||||
void CurveCreator_Utils::constructShape(
|
||||
const CurveCreator_ICurve* theCurve, TopoDS_Shape& theShape)
|
||||
{
|
||||
BRep_Builder aBuilder;
|
||||
TopoDS_Compound aComp;
|
||||
aBuilder.MakeCompound( aComp );
|
||||
for( int iSection = 0 ; iSection < theCurve->getNbSections() ; iSection++ )
|
||||
TopoDS_Compound aShape;
|
||||
aBuilder.MakeCompound(aShape);
|
||||
const int aSectionCount = theCurve->getNbSections();
|
||||
for (int aSectionI = 0; aSectionI < aSectionCount; ++aSectionI)
|
||||
{
|
||||
int theISection = iSection;
|
||||
|
||||
CurveCreator::SectionType aSectType = theCurve->getSectionType( theISection );
|
||||
int aPointSize = theCurve->getNbPoints( theISection );
|
||||
if ( aPointSize == 0 )
|
||||
const int aTmpPointCount = theCurve->getNbPoints(aSectionI);
|
||||
if (aTmpPointCount == 0)
|
||||
{
|
||||
continue;
|
||||
|
||||
bool aSectIsClosed = theCurve->isClosed( theISection );
|
||||
bool isPolyline = aSectType == CurveCreator::Polyline;
|
||||
|
||||
int iPoint = 0;
|
||||
gp_Pnt aPrevPoint, aPoint;
|
||||
// filters the curve points to skip equal points
|
||||
std::vector<gp_Pnt> aPoints;
|
||||
CurveCreator_UtilsICurve::getPoint( theCurve, theISection, iPoint, aPoint );
|
||||
aPoints.push_back( aPoint );
|
||||
aPrevPoint = aPoint;
|
||||
iPoint++;
|
||||
for( ; iPoint < aPointSize; iPoint++ ) {
|
||||
CurveCreator_UtilsICurve::getPoint( theCurve, theISection, iPoint, aPoint );
|
||||
if ( !isEqualPoints( aPrevPoint, aPoint ) )
|
||||
aPoints.push_back( aPoint );
|
||||
aPrevPoint = aPoint;
|
||||
}
|
||||
int aNbPoints = aPoints.size();
|
||||
|
||||
if ( aNbPoints == 1 ) {
|
||||
aPoint = aPoints.front();
|
||||
TopoDS_Vertex aVertex = BRepBuilderAPI_MakeVertex( aPoint ).Vertex();
|
||||
aBuilder.Add( aComp, aVertex );
|
||||
// Get the different points.
|
||||
std::vector<gp_Pnt> aTmpPoints;
|
||||
gp_Pnt aFirstPoint;
|
||||
CurveCreator_UtilsICurve::getPoint(theCurve, aSectionI, 0, aFirstPoint);
|
||||
gp_Pnt aPoint = aFirstPoint;
|
||||
aTmpPoints.push_back(aPoint);
|
||||
for (int aPI = 1; aPI < aTmpPointCount; ++aPI)
|
||||
{
|
||||
gp_Pnt aPoint2;
|
||||
CurveCreator_UtilsICurve::getPoint(theCurve, aSectionI, aPI, aPoint2);
|
||||
if (!isEqualPoints(aPoint, aPoint2))
|
||||
{
|
||||
aPoint = aPoint2;
|
||||
aTmpPoints.push_back(aPoint);
|
||||
}
|
||||
}
|
||||
else if ( aNbPoints > 1 ) {
|
||||
Handle(TColgp_HArray1OfPnt) aHCurvePoints = new TColgp_HArray1OfPnt(1, aNbPoints);
|
||||
TColgp_Array1OfVec aTangents(1, aNbPoints);
|
||||
Handle(TColStd_HArray1OfBoolean) aTangentFlags = new TColStd_HArray1OfBoolean(1, aNbPoints);
|
||||
gp_Vec aNullVec(0, 0, 0);
|
||||
|
||||
TopoDS_Edge aPointEdge;
|
||||
TopoDS_Vertex aVertex;
|
||||
|
||||
std::vector<gp_Pnt>::const_iterator aPointIt = aPoints.begin(), aPointLast = aPoints.end();
|
||||
aPoint = *aPointIt;
|
||||
|
||||
int aHIndex = 1;
|
||||
aVertex = BRepBuilderAPI_MakeVertex( aPoint ).Vertex();
|
||||
aBuilder.Add( aComp, aVertex );
|
||||
if ( !isPolyline ) {
|
||||
aHCurvePoints->SetValue( aHIndex, aPoint );
|
||||
aTangents.SetValue( aHIndex, aNullVec );
|
||||
aTangentFlags->SetValue( aHIndex, Standard_False );
|
||||
aHIndex++;
|
||||
const bool isClosed = theCurve->isClosed(aSectionI);
|
||||
int aPointCount = aTmpPoints.size();
|
||||
if (isClosed)
|
||||
{
|
||||
while (aPointCount > 1 &&
|
||||
isEqualPoints(aFirstPoint, aTmpPoints[aPointCount - 1]))
|
||||
{
|
||||
--aPointCount;
|
||||
}
|
||||
}
|
||||
|
||||
aPrevPoint = aPoint;
|
||||
aPointIt++;
|
||||
for( ; aPointIt != aPointLast; aPointIt++ ) {
|
||||
aPoint = *aPointIt;
|
||||
aVertex = BRepBuilderAPI_MakeVertex( aPoint ).Vertex();
|
||||
aBuilder.Add( aComp, aVertex );
|
||||
if ( isPolyline ) {
|
||||
TopoDS_Edge aPointEdge = BRepBuilderAPI_MakeEdge( aPrevPoint, aPoint ).Edge();
|
||||
aBuilder.Add( aComp, aPointEdge );
|
||||
}
|
||||
else {
|
||||
aHCurvePoints->SetValue( aHIndex, aPoint );
|
||||
aTangents.SetValue( aHIndex, aNullVec );
|
||||
aTangentFlags->SetValue( aHIndex, Standard_False );
|
||||
aHIndex++;
|
||||
}
|
||||
aPrevPoint = aPoint;
|
||||
}
|
||||
if( aSectIsClosed && ( aNbPoints > 2 ) ) {
|
||||
aPoint = aPoints.front();
|
||||
aVertex = BRepBuilderAPI_MakeVertex( aPoint ).Vertex();
|
||||
aBuilder.Add( aComp, aVertex );
|
||||
if ( isPolyline ) {
|
||||
aPointEdge = BRepBuilderAPI_MakeEdge( aPrevPoint, aPoint ).Edge();
|
||||
aBuilder.Add( aComp, aPointEdge );
|
||||
}
|
||||
}
|
||||
if( !isPolyline ) {
|
||||
// compute BSpline
|
||||
Handle(Geom_BSplineCurve) aBSplineCurve;
|
||||
GeomAPI_Interpolate aGBC(aHCurvePoints, aSectIsClosed, gp::Resolution());
|
||||
// correct the spline degree to be as 3 for non-periodic spline if number of points
|
||||
// less than 3. It is need to have a knot in each spline point. This knots are used
|
||||
// to found a neighbour points when a new point is inserted between two existing.
|
||||
if (!aSectIsClosed ) {
|
||||
if (aHCurvePoints->Length() == 3)
|
||||
aGBC.Load(aTangents, aTangentFlags);
|
||||
}
|
||||
// Add the vertices to the shape.
|
||||
Handle(TColgp_HArray1OfPnt) aPoints =
|
||||
new TColgp_HArray1OfPnt(1, aPointCount);
|
||||
for (Standard_Integer aPI = 0; aPI < aPointCount; ++aPI)
|
||||
{
|
||||
aPoints->SetValue(aPI + 1, aTmpPoints[aPI]);
|
||||
aBuilder.Add(aShape, BRepBuilderAPI_MakeVertex(aTmpPoints[aPI]));
|
||||
}
|
||||
if (aPointCount == 1)
|
||||
{
|
||||
continue;
|
||||
}
|
||||
|
||||
aGBC.Perform();
|
||||
if ( aGBC.IsDone() )
|
||||
aBSplineCurve = aGBC.Curve();
|
||||
TopoDS_Edge anEdge = BRepBuilderAPI_MakeEdge( aBSplineCurve ).Edge();
|
||||
TopoDS_Wire aWire = BRepBuilderAPI_MakeWire( anEdge ).Wire();
|
||||
aBuilder.Add( aComp, aWire );
|
||||
// Add the edges to the shape.
|
||||
const bool isPolyline =
|
||||
(theCurve->getSectionType(aSectionI) == CurveCreator::Polyline);
|
||||
if (isPolyline)
|
||||
{
|
||||
for (Standard_Integer aPN = 1; aPN < aPointCount; ++aPN)
|
||||
{
|
||||
aBuilder.Add(aShape, BRepBuilderAPI_MakeEdge(
|
||||
BRepBuilderAPI_MakeVertex(aPoints->Value(aPN)),
|
||||
BRepBuilderAPI_MakeVertex(aPoints->Value(aPN + 1))));
|
||||
}
|
||||
if (isClosed)
|
||||
{
|
||||
aBuilder.Add(aShape, BRepBuilderAPI_MakeEdge(
|
||||
BRepBuilderAPI_MakeVertex(aPoints->Value(aPointCount)),
|
||||
BRepBuilderAPI_MakeVertex(aPoints->Value(1))));
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
Handle(Geom_BSplineCurve) aBSpline;
|
||||
if (constructBSpline(aPoints, isClosed, aBSpline))
|
||||
{
|
||||
aBuilder.Add(aShape,
|
||||
BRepBuilderAPI_MakeWire(BRepBuilderAPI_MakeEdge(aBSpline)));
|
||||
}
|
||||
}
|
||||
}
|
||||
theShape = aComp;
|
||||
theShape = aShape;
|
||||
}
|
||||
|
||||
/**
|
||||
|
||||
@ -32,7 +32,9 @@
|
||||
#include <BRepBuilderAPI_MakeWire.hxx>
|
||||
#include <ElSLib.hxx>
|
||||
#include <GeomAPI_Interpolate.hxx>
|
||||
#include <TColgp_Array1OfVec.hxx>
|
||||
#include <TColgp_HArray1OfPnt.hxx>
|
||||
#include <TColStd_HArray1OfBoolean.hxx>
|
||||
#include <TopoDS_Wire.hxx>
|
||||
|
||||
const double POINT_CONFUSION_TOLERANCE = 0.0001;
|
||||
@ -97,58 +99,135 @@ TopoDS_Shape Sketcher_Utils::MakePolyline
|
||||
return aResult;
|
||||
}
|
||||
|
||||
//=======================================================================
|
||||
// function : constructBSpline
|
||||
// purpose : See function 'constructBSpline' in file 'CurveCreator_Utils.cxx'.
|
||||
//=======================================================================
|
||||
static bool constructBSpline(
|
||||
const Handle(TColgp_HArray1OfPnt)& thePoints,
|
||||
const Standard_Boolean theIsClosed,
|
||||
Handle(Geom_BSplineCurve)& theBSpline)
|
||||
{
|
||||
const int aPointCount = thePoints->Length();
|
||||
if (aPointCount <= 1)
|
||||
{
|
||||
return false;
|
||||
}
|
||||
|
||||
// Calculate the tangents.
|
||||
TColgp_Array1OfVec aTangents(1, aPointCount);
|
||||
Handle(TColStd_HArray1OfBoolean) aTangentFlags =
|
||||
new TColStd_HArray1OfBoolean(1, aPointCount);
|
||||
GeomAPI_Interpolate aInterpolator(thePoints, theIsClosed, 0);
|
||||
if (aPointCount == 2)
|
||||
{
|
||||
aTangentFlags->SetValue(1, Standard_False);
|
||||
aTangentFlags->SetValue(2, Standard_False);
|
||||
}
|
||||
else
|
||||
{
|
||||
for (Standard_Integer aPN = 1; aPN <= aPointCount; ++aPN)
|
||||
{
|
||||
gp_Vec aTangent;
|
||||
if (aPN != 1 || theIsClosed)
|
||||
{
|
||||
const Standard_Integer aPN1 = (aPN != 1) ? (aPN - 1) : aPointCount;
|
||||
aTangent = gp_Vec(thePoints->Value(aPN1),
|
||||
thePoints->Value(aPN)).Normalized();
|
||||
}
|
||||
if (aPN < aPointCount || theIsClosed)
|
||||
{
|
||||
const Standard_Integer aPN2 = (aPN != aPointCount) ? (aPN + 1) : 1;
|
||||
const gp_Vec aTangent2 = aTangent +
|
||||
gp_Vec(thePoints->Value(aPN), thePoints->Value(aPN2)).Normalized();
|
||||
if (aTangent2.SquareMagnitude() >= Precision::SquareConfusion())
|
||||
{
|
||||
aTangent = aTangent2.Normalized();
|
||||
}
|
||||
else
|
||||
{
|
||||
aTangent = -aTangent;
|
||||
}
|
||||
}
|
||||
aTangents.SetValue(aPN, aTangent);
|
||||
aTangentFlags->SetValue(aPN, Standard_True);
|
||||
}
|
||||
}
|
||||
|
||||
// Interpolate.
|
||||
aInterpolator.Load(aTangents, aTangentFlags, Standard_False);
|
||||
aInterpolator.Perform();
|
||||
const bool aResult = (aInterpolator.IsDone() == Standard_True);
|
||||
if (aResult)
|
||||
{
|
||||
theBSpline = aInterpolator.Curve();
|
||||
}
|
||||
return aResult;
|
||||
}
|
||||
|
||||
//=======================================================================
|
||||
// function : MakeInterpolation
|
||||
// purpose :
|
||||
//=======================================================================
|
||||
TopoDS_Shape Sketcher_Utils::MakeInterpolation
|
||||
(const std::list <double> &theCoords2D,
|
||||
const Standard_Boolean IsClosed,
|
||||
const gp_Ax3 &thePlane)
|
||||
TopoDS_Shape Sketcher_Utils::MakeInterpolation(
|
||||
const std::list<double>& theCoords2D,
|
||||
const Standard_Boolean theIsClosed,
|
||||
const gp_Ax3& thePlane)
|
||||
{
|
||||
std::list <gp_Pnt> aPoints;
|
||||
TopoDS_Shape aResult;
|
||||
if (theCoords2D.size() == 0)
|
||||
{
|
||||
return TopoDS_Shape();
|
||||
}
|
||||
|
||||
To3D(theCoords2D, thePlane, aPoints);
|
||||
|
||||
Standard_Integer aNbPnts = aPoints.size();
|
||||
|
||||
if (aNbPnts > 1) {
|
||||
if (IsClosed &&
|
||||
aPoints.front().IsEqual(aPoints.back(), POINT_CONFUSION_TOLERANCE)) {
|
||||
// The polyline should be closed, first and last points are confused.
|
||||
// Remove the last point.
|
||||
aPoints.pop_back();
|
||||
--aNbPnts;
|
||||
// Get the different points.
|
||||
std::list<gp_Pnt> aTmpPoints;
|
||||
To3D(theCoords2D, thePlane, aTmpPoints);
|
||||
gp_Pnt aFirstPoint = aTmpPoints.front();
|
||||
gp_Pnt aPoint = aFirstPoint;
|
||||
std::list<gp_Pnt>::iterator aPIt = aTmpPoints.begin();
|
||||
for (++aPIt; aPIt != aTmpPoints.cend();)
|
||||
{
|
||||
const gp_Pnt aPoint2 = *aPIt;
|
||||
if (!aPoint.IsEqual(aPoint2, POINT_CONFUSION_TOLERANCE))
|
||||
{
|
||||
aPoint = aPoint2;
|
||||
++aPIt;
|
||||
}
|
||||
else
|
||||
{
|
||||
aTmpPoints.erase(aPIt);
|
||||
}
|
||||
}
|
||||
if (theIsClosed)
|
||||
{
|
||||
while (--aPIt != aTmpPoints.cbegin() &&
|
||||
aFirstPoint.IsEqual(*aPIt, POINT_CONFUSION_TOLERANCE))
|
||||
{
|
||||
aTmpPoints.erase(aPIt);
|
||||
}
|
||||
}
|
||||
|
||||
if (aNbPnts == 1) {
|
||||
// The result is vertex.
|
||||
aResult = BRepBuilderAPI_MakeVertex(aPoints.front()).Vertex();
|
||||
} else if (aNbPnts > 1) {
|
||||
std::list <gp_Pnt>::const_iterator anIter = aPoints.begin();
|
||||
Handle(TColgp_HArray1OfPnt) aHCurvePoints =
|
||||
new TColgp_HArray1OfPnt(1, aNbPnts);
|
||||
Standard_Integer i;
|
||||
|
||||
for (i = 1; anIter != aPoints.end(); ++anIter, ++i) {
|
||||
aHCurvePoints->SetValue(i, *anIter);
|
||||
}
|
||||
|
||||
// Compute BSpline
|
||||
Standard_Real aTol = Precision::Confusion();
|
||||
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 single point case.
|
||||
const int aPointCount = aTmpPoints.size();
|
||||
if (aPointCount == 1)
|
||||
{
|
||||
return BRepBuilderAPI_MakeVertex(aTmpPoints.front());
|
||||
}
|
||||
|
||||
return aResult;
|
||||
// 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 TopoDS_Shape();
|
||||
}
|
||||
|
||||
//=======================================================================
|
||||
|
||||
Loading…
Reference in New Issue
Block a user