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#include <StdFail_NotDone.hxx>
#include <Standard_DomainError.hxx>
#include <Standard_OutOfRange.hxx>
#include <Standard_ConstructionError.hxx>
#include <Standard_NotImplemented.hxx>
#include <GCPnts_DeflectionType.hxx>
#include <CPnts_UniformDeflection.hxx>
#include <TColStd_Array1OfReal.hxx>
#include <TColStd_SequenceOfReal.hxx>
#include <BSplCLib.hxx>
#include <gp_Circ.hxx>
#include <gp_Circ2d.hxx>
#include <Precision.hxx>
//=======================================================================
//function : Controle
//purpose :
//=======================================================================
static void Controle (const TheCurve& C,
TColStd_SequenceOfReal& Parameters,
TColgp_SequenceOfPnt& Points,
const Standard_Real U2)
{
Standard_Integer nbp = Points.Length();
if (nbp > 2)
{
Standard_Real Ua = Parameters (nbp - 2);
Standard_Real Ub = Parameters (nbp - 1);
if (U2 - Ub < 0.33 * (U2 - Ua))
{
Standard_Real Uc = (U2 + Ua) * 0.5;
Parameters (nbp - 1) = Uc;
Points (nbp - 1) = Value (C, Uc);
}
}
}
//=======================================================================
//function : PerformLinear
//purpose :
//=======================================================================
static Standard_Boolean PerformLinear (const TheCurve& C,
TColStd_SequenceOfReal& Parameters,
TColgp_SequenceOfPnt& Points,
const Standard_Real U1,
const Standard_Real U2)
{
gp_Pnt aPoint;
Parameters.Append (U1);
aPoint = Value (C, U1);
Points.Append (aPoint);
Parameters.Append (U2);
aPoint = Value (C, U2);
Points.Append (aPoint);
return Standard_True;
}
//=======================================================================
//function : PerformCircular
//purpose :
//=======================================================================
static Standard_Boolean PerformCircular (const TheCurve& C,
TColStd_SequenceOfReal& Parameters,
TColgp_SequenceOfPnt& Points,
const Standard_Real Deflection,
const Standard_Real U1,
const Standard_Real U2)
{
gp_Pnt aPoint;
Standard_Real Angle = Max (1.0e0 - (Deflection / C.Circle().Radius()), 0.0e0);
Angle = 2.0e0 * ACos (Angle);
Standard_Integer NbPoints = (Standard_Integer )((U2 - U1) / Angle);
NbPoints += 2;
Angle = (U2 - U1) / (Standard_Real) (NbPoints - 1);
Standard_Real U = U1;
for (Standard_Integer i = 1; i <= NbPoints; ++i)
{
Parameters.Append (U);
aPoint = Value (C, U);
Points.Append (aPoint);
U += Angle;
}
return Standard_True;
}
static GCPnts_DeflectionType GetDefType (TheCurve& C)
{
if (C.NbIntervals (GeomAbs_C2) > 1)
return GCPnts_DefComposite;
switch (C.GetType())
{
case GeomAbs_Line: return GCPnts_Linear;
case GeomAbs_Circle: return GCPnts_Circular;
case GeomAbs_BSplineCurve:
{
Handle_TheBSplineCurve aBSpline = C.BSpline();
return (aBSpline->NbPoles() == 2) ? GCPnts_Linear : GCPnts_Curved;
}
case GeomAbs_BezierCurve:
{
Handle_TheBezierCurve aBezier = C.Bezier();
return (aBezier->NbPoles() == 2) ? GCPnts_Linear : GCPnts_Curved;
}
default: return GCPnts_Curved;
}
}
//=======================================================================
//function : PerformCurve
//purpose :
//=======================================================================
static Standard_Boolean PerformCurve (TColStd_SequenceOfReal& Parameters,
TColgp_SequenceOfPnt& Points,
const TheCurve& C,
const Standard_Real Deflection,
const Standard_Real U1,
const Standard_Real U2,
const Standard_Real EPSILON,
const Standard_Boolean WithControl)
{
CPnts_UniformDeflection Iterator (C, Deflection, U1, U2, EPSILON, WithControl);
for(; Iterator.More(); Iterator.Next())
{
Parameters.Append (Iterator.Value());
Points.Append (Iterator.Point());
}
return Iterator.IsAllDone();
}
//=======================================================================
//function : PerformComposite
//purpose :
//=======================================================================
static Standard_Boolean PerformComposite (TColStd_SequenceOfReal& Parameters,
TColgp_SequenceOfPnt& Points,
TheCurve& C,
const Standard_Real Deflection,
const Standard_Real U1,
const Standard_Real U2,
const Standard_Real EPSILON,
const Standard_Boolean WithControl)
{
Standard_Integer NbIntervals = C.NbIntervals (GeomAbs_C2);
Standard_Integer PIndex;
TColStd_Array1OfReal TI (1, NbIntervals + 1);
C.Intervals (TI, GeomAbs_C2);
BSplCLib::Hunt (TI, U1, PIndex);
// iterate by continuous segments
Standard_Real Ua = U1;
for (Standard_Integer Index = PIndex;;)
{
Standard_Real Ub = Min (U2, TI (Index + 1));
if (!PerformCurve (Parameters, Points, C, Deflection,
Ua, Ub, EPSILON, WithControl))
{
return Standard_False;
}
++Index;
if (Index > NbIntervals || U2 < TI (Index))
return Standard_True;
// remove last point to avoid duplication
Parameters.Remove (Parameters.Length());
Points.Remove (Parameters.Length());
Ua = Ub;
}
#ifndef _MSC_VER
return Standard_True;
#endif
}
//=======================================================================
//function : GCPnts_UniformDeflection
//purpose :
//=======================================================================
GCPnts_UniformDeflection::GCPnts_UniformDeflection (TheCurve& C,
const Standard_Real Deflection,
const Standard_Real U1,
const Standard_Real U2,
const Standard_Boolean WithControl)
{
Initialize (C, Deflection, U1, U2, WithControl);
}
//=======================================================================
//function : GCPnts_UniformDeflection
//purpose :
//=======================================================================
GCPnts_UniformDeflection::GCPnts_UniformDeflection (TheCurve& C,
const Standard_Real Deflection,
const Standard_Boolean WithControl)
{
Initialize(C, Deflection, WithControl);
}
//=======================================================================
//function : Initialize
//purpose :
//=======================================================================
void GCPnts_UniformDeflection::Initialize (TheCurve& C,
const Standard_Real Deflection,
const Standard_Boolean WithControl)
{
Initialize (C, Deflection, C.FirstParameter(), C.LastParameter(), WithControl);
}
//=======================================================================
//function : Initialize
//purpose :
//=======================================================================
void GCPnts_UniformDeflection::Initialize (TheCurve& C,
const Standard_Real Deflection,
const Standard_Real theU1,
const Standard_Real theU2,
const Standard_Boolean WithControl)
{
Standard_Real EPSILON = C.Resolution (Precision::Confusion());
myDeflection = Deflection;
myDone = Standard_False;
myParams.Clear();
myPoints.Clear();
Standard_Real U1 = Min (theU1, theU2);
Standard_Real U2 = Max (theU1, theU2);
GCPnts_DeflectionType Type = GetDefType (C);
switch (Type)
{
case GCPnts_Linear:
myDone = PerformLinear (C, myParams, myPoints, U1, U2);
break;
case GCPnts_Circular:
myDone = PerformCircular (C, myParams, myPoints, Deflection, U1, U2);
break;
case GCPnts_Curved:
myDone = PerformCurve (myParams, myPoints, C, Deflection,
U1, U2, EPSILON, WithControl);
break;
case GCPnts_DefComposite:
myDone = PerformComposite (myParams, myPoints, C, Deflection,
U1, U2, EPSILON, WithControl);
break;
}
// controle des derniers points:
Controle (C, myParams, myPoints, U2);
}
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