OCCT

// Created on: 1992-11-06
// Created by: Remi LEQUETTE
// Copyright (c) 1992-1999 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 <BRepPrim_Sphere.hxx>
#include <Geom2d_Circle.hxx>
#include <Geom_Circle.hxx>
#include <Geom_SphericalSurface.hxx>
#include <gp.hxx>
#include <gp_Ax2.hxx>
#include <gp_Ax2d.hxx>
#include <gp_Pnt.hxx>
#include <Precision.hxx>
#include <TopoDS_Face.hxx>

// parameters on the meridian
#define PMIN (-0.5 * M_PI)
#define PMAX (0.5 * M_PI)

//=================================================================================================

BRepPrim_Sphere::BRepPrim_Sphere(const Standard_Real Radius)
    : BRepPrim_Revolution(gp::XOY(), PMIN, PMAX),
      myRadius(Radius)
{
  SetMeridian();
}

//=================================================================================================

BRepPrim_Sphere::BRepPrim_Sphere(const gp_Pnt& Center, const Standard_Real Radius)
    : BRepPrim_Revolution(gp_Ax2(Center, gp_Dir(0, 0, 1), gp_Dir(1, 0, 0)), PMIN, PMAX),
      myRadius(Radius)
{
  SetMeridian();
}

//=================================================================================================

BRepPrim_Sphere::BRepPrim_Sphere(const gp_Ax2& Axes, const Standard_Real Radius)
    : BRepPrim_Revolution(Axes, PMIN, PMAX),
      myRadius(Radius)
{
  SetMeridian();
}

//=================================================================================================

TopoDS_Face BRepPrim_Sphere::MakeEmptyLateralFace() const
{
  Handle(Geom_SphericalSurface) S = new Geom_SphericalSurface(Axes(), myRadius);
  TopoDS_Face                   F;
  myBuilder.Builder().MakeFace(F, S, Precision::Confusion());
  return F;
}

//=================================================================================================

void BRepPrim_Sphere::SetMeridian()
{
  // Offset the parameters on the meridian
  // to trim the edge in 3pi/2, 5pi/2

  SetMeridianOffset(2 * M_PI);

  gp_Dir D = Axes().YDirection();
  D.Reverse();
  gp_Ax2                A(Axes().Location(), D, Axes().XDirection());
  Handle(Geom_Circle)   C   = new Geom_Circle(A, myRadius);
  Handle(Geom2d_Circle) C2d = new Geom2d_Circle(gp_Ax2d(gp_Pnt2d(0, 0), gp_Dir2d(1, 0)), myRadius);
  Meridian(C, C2d);
}