occt/src/IGESGeom/IGESGeom_BSplineCurve.cxx

// Created by: CKY / Contract Toubro-Larsen
// Copyright (c) 1993-1999 Matra Datavision
// Copyright (c) 1999-2014 OPEN CASCADE SAS
//
// This file is part of Open CASCADE Technology software library.
//
// This library is free software; you can redistribute it and/or modify it under
// the terms of the GNU Lesser General Public License version 2.1 as published
// by the Free Software Foundation, with special exception defined in the file
// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
// distribution for complete text of the license and disclaimer of any warranty.
//
// Alternatively, this file may be used under the terms of Open CASCADE
// commercial license or contractual agreement.

//--------------------------------------------------------------------
//--------------------------------------------------------------------

#include <gp_GTrsf.hxx>
#include <gp_Pnt.hxx>
#include <gp_XYZ.hxx>
#include <IGESGeom_BSplineCurve.hxx>
#include <Standard_DimensionMismatch.hxx>
#include <Standard_OutOfRange.hxx>
#include <Standard_Type.hxx>

IMPLEMENT_STANDARD_RTTIEXT(IGESGeom_BSplineCurve,IGESData_IGESEntity)

IGESGeom_BSplineCurve::IGESGeom_BSplineCurve ()    {  }


    void IGESGeom_BSplineCurve::Init
  (const Standard_Integer anIndex,
   const Standard_Integer aDegree, const Standard_Boolean aPlanar,
   const Standard_Boolean aClosed, const Standard_Boolean aPolynom,
   const Standard_Boolean aPeriodic, 
   const Handle(TColStd_HArray1OfReal)& allKnots,
   const Handle(TColStd_HArray1OfReal)& allWeights,
   const Handle(TColgp_HArray1OfXYZ)& allPoles,
   const Standard_Real aUmin, const Standard_Real aUmax,
   const gp_XYZ& aNorm)
{
  if (!allPoles.IsNull())
  {
    if (allKnots->Lower() != -aDegree
     || allKnots->Upper() != anIndex + 1
     || allPoles->Lower() != 0)
    {
      throw Standard_DimensionMismatch ("IGESGeom_BSplineCurve : Init");
    }
    if (!allWeights.IsNull())
    {
      if (allPoles->Length() != allWeights->Length()
       || allWeights->Upper() !=  anIndex
       || allWeights->Lower() != 0)
      {
        throw Standard_DimensionMismatch ("IGESGeom_BSplineCurve : Init");
      }
    }
  }

  theIndex     = anIndex;
  theDegree    = aDegree;
  isPlanar     = aPlanar;
  isClosed     = aClosed;
  isPolynomial = aPolynom;
  isPeriodic   = aPeriodic;
  theKnots     = allKnots; 
  theWeights   = allWeights;
  thePoles     = allPoles;
  theUmin      = aUmin;
  theUmax      = aUmax;
  theNorm      = aNorm;
  InitTypeAndForm(126,FormNumber());
// FormNumber  precises the shape  0-5
}

    void  IGESGeom_BSplineCurve::SetFormNumber (const Standard_Integer form)
{
  if (form < 0 || form > 5) throw Standard_OutOfRange("IGESGeom_BSplineCurve : SetFormNumber");
  InitTypeAndForm(126,form);
}

    Standard_Integer IGESGeom_BSplineCurve::UpperIndex () const
{
  return theIndex;
}

    Standard_Integer IGESGeom_BSplineCurve::Degree () const
{
  return theDegree;
}

    Standard_Boolean IGESGeom_BSplineCurve::IsPlanar () const
{
  return isPlanar;
}

    Standard_Boolean IGESGeom_BSplineCurve::IsClosed () const
{
  return isClosed;
}

    Standard_Boolean IGESGeom_BSplineCurve::IsPolynomial
  (const Standard_Boolean flag) const
{
  if (flag || theWeights.IsNull()) return isPolynomial;
  Standard_Integer i, i1 = theWeights->Lower(), i2 = theWeights->Upper();
  Standard_Real w0 = theWeights->Value(i1);
  for (i = i1+1; i <= i2; i ++)
    if (Abs (theWeights->Value(i) - w0) > 1.e-10) return Standard_False;
  return Standard_True;
}

    Standard_Boolean IGESGeom_BSplineCurve::IsPeriodic () const
{
  return isPeriodic;
}

    Standard_Integer IGESGeom_BSplineCurve::NbKnots () const
{
  return (theKnots.IsNull() ? 0 : theKnots->Length());
}

    Standard_Real IGESGeom_BSplineCurve::Knot
  (const Standard_Integer anIndex) const
{
  return theKnots->Value(anIndex);
}

    Standard_Integer IGESGeom_BSplineCurve::NbPoles () const
{
  return (thePoles.IsNull() ? 0 : thePoles->Length());
}

    Standard_Real IGESGeom_BSplineCurve::Weight
  (const Standard_Integer anIndex) const
{
  return theWeights->Value(anIndex);
}

    gp_Pnt IGESGeom_BSplineCurve::Pole (const Standard_Integer anIndex) const
{
  gp_XYZ tempXYZ = thePoles->Value(anIndex);
  gp_Pnt Pole(tempXYZ);
  return Pole;
}

    gp_Pnt IGESGeom_BSplineCurve::TransformedPole
  (const Standard_Integer anIndex) const
{
  gp_XYZ tempXYZ = thePoles->Value(anIndex);
  if (HasTransf()) Location().Transforms(tempXYZ);
  gp_Pnt Pole(tempXYZ);
  return Pole;
}

    Standard_Real IGESGeom_BSplineCurve::UMin () const
{
  return theUmin;
}

    Standard_Real IGESGeom_BSplineCurve::UMax () const
{
  return theUmax;
}

    gp_XYZ IGESGeom_BSplineCurve::Normal () const
{
  return theNorm;
}