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// File: GeomLib_Interpolate.cxx
// Created: Fri Aug 30 18:03:15 1996
// Author: Xavier BENVENISTE
// <xab@zozox.paris1.matra-dtv.fr>
#include <GeomLib_Interpolate.ixx>
#include <Standard_ConstructionError.hxx>
#include <PLib.hxx>
#include <BSplCLib.hxx>
#include <gp_Vec.hxx>
#include <TColgp_Array1OfPnt.hxx>
#include <TColgp_Array1OfVec.hxx>
#include <TColStd_HArray1OfReal.hxx>
#include <TColStd_Array1OfBoolean.hxx>
#include <TColStd_Array1OfInteger.hxx>
#include <Handle_TColStd_HArray1OfBoolean.hxx>
//=======================================================================
//function : GeomLib_Interpolate
//purpose :
//=======================================================================
GeomLib_Interpolate::GeomLib_Interpolate
(const Standard_Integer Degree,
const Standard_Integer NumPoints,
const TColgp_Array1OfPnt& PointsArray,
const TColStd_Array1OfReal& ParametersArray)
{
Standard_Integer ii,
num_knots,
inversion_problem,
num_controls,
jj ;
if (NumPoints < Degree ||
PointsArray.Lower() != 1 ||
PointsArray.Upper() < NumPoints ||
ParametersArray.Lower() != 1 ||
ParametersArray.Upper() < NumPoints) {
myError = GeomLib_NotEnoughtPoints ;
}
else if (Degree < 3) {
myError = GeomLib_DegreeSmallerThan3 ;
}
else {
gp_Pnt null_point(0.0e0, 0.0e0, 0.0e0) ;
Standard_Integer order = Degree + 1,
half_order ;
if (order % 2) {
order -= 1 ;
}
half_order = order / 2 ;
num_knots = NumPoints + 2 * order - 2 ;
num_controls = num_knots - order ;
TColStd_Array1OfReal flat_knots(1,num_knots) ;
TColStd_Array1OfInteger contacts (1,num_controls) ;
TColStd_Array1OfInteger multiplicities(1, NumPoints) ;
TColStd_Array1OfReal parameters(1,num_controls) ;
TColgp_Array1OfPnt poles(1,num_controls) ;
for (ii = 1 ; ii <= NumPoints ; ii++) {
multiplicities(ii) = 1 ;
}
multiplicities(1) = order ;
multiplicities(NumPoints) = order ;
for (ii = 1,
jj = num_controls + 1 ; ii <= order ; ii++, jj++) {
flat_knots(ii) = ParametersArray(1) ;
flat_knots(jj) = ParametersArray(NumPoints) ;
}
jj = order + 1 ;
for (ii = 2 ; ii < NumPoints ; ii++) {
flat_knots(jj) = ParametersArray(ii) ;
jj+= 1 ;
}
for (ii = 1 ; ii <= num_controls ; ii++) {
contacts(ii) = 0 ;
}
jj = num_controls ;
for (ii = 1 ; ii <= half_order ; ii++) {
contacts(ii) = half_order + ii - 1 ;
parameters(ii) = ParametersArray(1) ;
poles(ii) = null_point ;
contacts(jj) = half_order + ii - 1 ;
parameters(jj) = ParametersArray(NumPoints) ;
poles(jj) = null_point ;
jj -= 1 ;
}
jj = half_order + 1 ;
for (ii = 2 ; ii < NumPoints ; ii++) {
parameters(jj) = ParametersArray(ii) ;
poles(jj) = PointsArray(ii) ;
jj += 1 ;
}
contacts(1) = 0 ;
contacts(num_controls) = 0 ;
poles(1) = PointsArray(1) ;
poles(num_controls) = PointsArray(NumPoints) ;
BSplCLib::Interpolate(order-1,
flat_knots,
parameters,
contacts,
poles,
inversion_problem) ;
if (!inversion_problem) {
myCurve =
new Geom_BSplineCurve(poles,
ParametersArray,
multiplicities,
order-1) ;
myIsDone = Standard_True ;
}
else {
myError = GeomLib_InversionProblem ;
}
}
}
//=======================================================================
//function : Curve
//purpose :
//=======================================================================
Handle(Geom_BSplineCurve) GeomLib_Interpolate::Curve() const
{
return myCurve ;
}
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