// Created on: 1996-01-25
// Created by: Frederic MAUPAS
// Copyright (c) 1996-1999 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 <Geom_ConicalSurface.hxx>
#include <Geom_CylindricalSurface.hxx>
#include <Geom_Plane.hxx>
#include <Geom_RectangularTrimmedSurface.hxx>
#include <Geom_SphericalSurface.hxx>
#include <Geom_SurfaceOfRevolution.hxx>
#include <Geom_ToroidalSurface.hxx>
#include <GeomToStep_MakeRectangularTrimmedSurface.hxx>
#include <GeomToStep_MakeSurface.hxx>
#include <StdFail_NotDone.hxx>
#include <StepGeom_RectangularTrimmedSurface.hxx>
#include <StepGeom_Surface.hxx>
#include <TCollection_HAsciiString.hxx>
#include <UnitsMethods.hxx>

//=============================================================================
// Creation d' une rectangular_trimmed_surface de STEP
// a partir d' une RectangularTrimmedSurface de Geom
//=============================================================================
GeomToStep_MakeRectangularTrimmedSurface::
  GeomToStep_MakeRectangularTrimmedSurface( const
    Handle(Geom_RectangularTrimmedSurface)& RTSurf )
								      
{

  Handle(StepGeom_RectangularTrimmedSurface) StepRTS = new StepGeom_RectangularTrimmedSurface;

  Handle(TCollection_HAsciiString) aName = new TCollection_HAsciiString("");

  GeomToStep_MakeSurface mkSurf(RTSurf->BasisSurface());
  if (!mkSurf.IsDone()) {
    done = Standard_False;
    return;
  }
  Handle(StepGeom_Surface) StepSurf = mkSurf.Value();

  Standard_Real U1,U2,V1,V2;
  RTSurf->Bounds(U1, U2, V1, V2);
  
  // -----------------------------------------
  // Modification of the Trimming Parameters ?
  // -----------------------------------------

  Standard_Real AngleFact = 180./M_PI;
  Standard_Real uFact = 1.;
  Standard_Real vFact = 1.;
  Standard_Real LengthFact  = UnitsMethods::LengthFactor();
  Handle(Geom_Surface) theSurf = RTSurf->BasisSurface();
  if (theSurf->IsKind(STANDARD_TYPE(Geom_CylindricalSurface))) {
    uFact = AngleFact;
    vFact = 1. / LengthFact;
  }
  else if (theSurf->IsKind(STANDARD_TYPE(Geom_SurfaceOfRevolution))) {
    uFact = AngleFact;
  }
  else if (theSurf->IsKind(STANDARD_TYPE(Geom_ToroidalSurface)) ||
	   theSurf->IsKind(STANDARD_TYPE(Geom_SphericalSurface))) {
    uFact = AngleFact;
    vFact = AngleFact;
  }
  else if (theSurf->IsKind(STANDARD_TYPE(Geom_ConicalSurface))) {
    Handle(Geom_ConicalSurface) conicS = 
      Handle(Geom_ConicalSurface)::DownCast(theSurf);
    Standard_Real semAng = conicS->SemiAngle();
    uFact = AngleFact;
    vFact = Cos(semAng) / LengthFact;
  }
  else if (theSurf->IsKind(STANDARD_TYPE(Geom_Plane))) {
    uFact = vFact = 1. / LengthFact;
  }
  
  U1 = U1 * uFact;
  U2 = U2 * uFact;
  V1 = V1 * vFact;
  V2 = V2 * vFact;

  StepRTS->Init(aName, StepSurf, U1, U2, V1, V2, Standard_True, Standard_True);
  theRectangularTrimmedSurface = StepRTS;
  done = Standard_True;
}

//=============================================================================
// renvoi des valeurs
//=============================================================================

const Handle(StepGeom_RectangularTrimmedSurface) &
      GeomToStep_MakeRectangularTrimmedSurface::Value() const
{
  StdFail_NotDone_Raise_if (!done, "GeomToStep_MakeRectangularTrimmedSurface::Value() - no result");
  return theRectangularTrimmedSurface;
}