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// File: StepToGeom_MakeEllipse2d.cxx
// Created: Thu Sep 1 13:57:24 1994
// Author: Frederic MAUPAS
//:o9 abv 19.02.99: bm4_id_punch_b.stp #678: treatment of minR > maxR
// NOTE: parametrisation of resulting ellipse shifted on pi/2
#include <StepToGeom_MakeEllipse2d.ixx>
#include <StepGeom_Ellipse.hxx>
#include <StepGeom_Axis2Placement2d.hxx>
#include <Geom2d_AxisPlacement.hxx>
#include <StepToGeom_MakeAxisPlacement.hxx>
#include <gp_Ax2.hxx>
#include <gp_Ax22d.hxx>
//=============================================================================
// Creation d' un Ellipse de Geom2d a partir d' un Ellipse de Step
//=============================================================================
Standard_Boolean StepToGeom_MakeEllipse2d::Convert
(const Handle(StepGeom_Ellipse)& SC,
Handle(Geom2d_Ellipse)& CC)
{
const StepGeom_Axis2Placement AxisSelect = SC->Position();
if (AxisSelect.CaseNum(AxisSelect.Value()) == 1) {
Handle(Geom2d_AxisPlacement) A1;
if (StepToGeom_MakeAxisPlacement::Convert
(Handle(StepGeom_Axis2Placement2d)::DownCast(AxisSelect.Value()),A1))
{
gp_Ax22d A( A1->Ax2d() );
const Standard_Real majorR = SC->SemiAxis1();
const Standard_Real minorR = SC->SemiAxis2();
if ( majorR - minorR >= 0. ) { //:o9 abv 19 Feb 99: bm4_id_punch_b.stp #678: protection
CC = new Geom2d_Ellipse(A, majorR, minorR);
}
else {
const gp_Dir2d X = A.XDirection();
A.SetXDirection ( gp_Dir2d ( X.X(), -X.Y() ) );
CC = new Geom2d_Ellipse(A, minorR, majorR);
}
return Standard_True;
}
}
return Standard_False;
}
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