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// File: StepToGeom_MakeEllipse.cxx
// Created: Thu Sep 1 13:48:41 1994
// Author: Frederic MAUPAS
//:o9 abv 19.02.99: bm4_id_punch_b.stp #678: treatment of ellipse with minR > maxR
// NOTE: parametrisation of resulting ellipse shifted on pi/2
#include <StepToGeom_MakeEllipse.ixx>
#include <StepGeom_Ellipse.hxx>
#include <StepGeom_Axis2Placement3d.hxx>
#include <Geom_Axis2Placement.hxx>
#include <StepToGeom_MakeAxis2Placement.hxx>
#include <gp_Ax2.hxx>
#include <UnitsMethods.hxx>
//=============================================================================
// Creation d' un Ellipse de Geom a partir d' un Ellipse de Step
//=============================================================================
Standard_Boolean StepToGeom_MakeEllipse::Convert
(const Handle(StepGeom_Ellipse)& SC,
Handle(Geom_Ellipse)& CC)
{
const StepGeom_Axis2Placement AxisSelect = SC->Position();
if (AxisSelect.CaseNum(AxisSelect.Value()) == 2) {
Handle(Geom_Axis2Placement) A1;
if (StepToGeom_MakeAxis2Placement::Convert
(Handle(StepGeom_Axis2Placement3d)::DownCast(AxisSelect.Value()),A1))
{
gp_Ax2 A( A1->Ax2() );
const Standard_Real LF = UnitsMethods::LengthFactor();
const Standard_Real majorR = SC->SemiAxis1() * LF;
const Standard_Real minorR = SC->SemiAxis2() * LF;
if ( majorR - minorR >= 0. ) { //:o9 abv 19 Feb 99
CC = new Geom_Ellipse(A, majorR, minorR);
}
//:o9 abv 19 Feb 99
else {
A.SetXDirection ( A.XDirection() ^ A.Direction() );
CC = new Geom_Ellipse(A, minorR, majorR);
}
return Standard_True;
}
}
return Standard_False;
}
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