// 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.

/***********************************************************************
     FONCTION :
     ----------
        Classe V3d_View_2.cxx :
     HISTORIQUE DES MODIFICATIONS   :
     --------------------------------
      00-09-92 : GG  ; Creation.
      24-12-97 : FMN ; Suppression de GEOMLITE
      23-11-00 : GG  ; Add IsActiveLight() and IsActivePlane() methods
************************************************************************/
//		Use myView->PlaneLimit() instead Visual3d_ClipPlane::Limit()
//		Use myView->LightLimit() instead Visual3d_Light::Limit()
/*----------------------------------------------------------------------*/
/*
 * Includes
 */

#include <Aspect_GradientBackground.hxx>
#include <Aspect_Grid.hxx>
#include <Aspect_Window.hxx>
#include <Bnd_Box.hxx>
#include <gp_Ax3.hxx>
#include <gp_Dir.hxx>
#include <Graphic3d_Group.hxx>
#include <Graphic3d_Structure.hxx>
#include <Graphic3d_TextureEnv.hxx>
#include <Graphic3d_Vector.hxx>
#include <Quantity_Color.hxx>
#include <Standard_MultiplyDefined.hxx>
#include <Standard_TypeMismatch.hxx>
#include <V3d.hxx>
#include <V3d_BadValue.hxx>
#include <V3d_Light.hxx>
#include <V3d_UnMapped.hxx>
#include <V3d_View.hxx>
#include <V3d_Viewer.hxx>
#include <Visual3d_Light.hxx>
#include <Visual3d_View.hxx>

/*----------------------------------------------------------------------*/
void V3d_View::SetLightOn( const Handle(V3d_Light)& TheLight ) {

  if( !MyActiveLights.Contains(TheLight)){
    V3d_BadValue_Raise_if( MyActiveLights.Extent() >= MyView->LightLimit(),
			  "too many lights");
    MyActiveLights.Append(TheLight) ;
    MyViewContext.SetLightOn(TheLight->Light());
    MyView->SetContext(MyViewContext);
  }
}

void V3d_View::SetLightOff( const Handle(V3d_Light)& TheLight ) {

  Standard_TypeMismatch_Raise_if(MyViewer->IsGlobalLight(TheLight),"the light is global");
  
  MyActiveLights.Remove(TheLight);
  MyViewContext.SetLightOff(TheLight->Light()) ;
  MyView->SetContext(MyViewContext) ;
}

Standard_Boolean V3d_View::IsActiveLight(const Handle(V3d_Light)& aLight) const {
  if( aLight.IsNull() ) return Standard_False;
  return  MyActiveLights.Contains(aLight);
}

void V3d_View::SetLightOn( ) {

  for(MyViewer->InitDefinedLights();MyViewer->MoreDefinedLights();MyViewer->NextDefinedLights()){
    if(!MyActiveLights.Contains(MyViewer->DefinedLight())){
      MyActiveLights.Append(MyViewer->DefinedLight()) ;
      MyViewContext.SetLightOn(MyViewer->DefinedLight()->Light());
    }
  }
  MyView->SetContext(MyViewContext) ;
  
}

void V3d_View::SetLightOff( ) {
  
  InitActiveLights();
  while(MoreActiveLights()) {
    if (!MyViewer->IsGlobalLight(ActiveLight())) {
      MyActiveLights.Remove(ActiveLight());
      MyViewContext.SetLightOff(ActiveLight()->Light());
    }
    else
      NextActiveLights();
  }
  MyView->SetContext(MyViewContext) ;

}

void V3d_View::InitActiveLights() {
myActiveLightsIterator.Initialize(MyActiveLights);
}
Standard_Boolean V3d_View::MoreActiveLights () const {
  return myActiveLightsIterator.More();
}
void V3d_View::NextActiveLights () {
  myActiveLightsIterator.Next();
}
Handle(V3d_Light) V3d_View::ActiveLight() const {
  return (Handle(V3d_Light)&)(myActiveLightsIterator.Value());}

Standard_Boolean V3d_View::IfMoreLights() const {

        return MyActiveLights.Extent() < MyView->LightLimit();
}

//=======================================================================
//function : AddClipPlane
//purpose  :
//=======================================================================
void V3d_View::AddClipPlane (const Handle(Graphic3d_ClipPlane)& thePlane)
{
  MyViewContext.ChangeClipPlanes().Append (thePlane);
  MyView->SetContext (MyViewContext);
}

//=======================================================================
//function : RemoveClipPlane
//purpose  :
//=======================================================================
void V3d_View::RemoveClipPlane (const Handle(Graphic3d_ClipPlane)& thePlane)
{
  Graphic3d_SequenceOfHClipPlane& aSeqOfPlanes = MyViewContext.ChangeClipPlanes();
  Graphic3d_SequenceOfHClipPlane::Iterator aPlaneIt (aSeqOfPlanes);
  for (; aPlaneIt.More(); aPlaneIt.Next())
  {
    const Handle(Graphic3d_ClipPlane)& aPlane = aPlaneIt.Value();
    if (aPlane != thePlane)
      continue;

    aSeqOfPlanes.Remove (aPlaneIt);
    MyView->SetContext (MyViewContext);
    return;
  }
}

//=======================================================================
//function : SetClipPlanes
//purpose  :
//=======================================================================
void V3d_View::SetClipPlanes (const Graphic3d_SequenceOfHClipPlane& thePlanes)
{
  MyViewContext.ChangeClipPlanes() = thePlanes;
  MyView->SetContext (MyViewContext);
}

//=======================================================================
//function : GetClipPlanes
//purpose  :
//=======================================================================
const Graphic3d_SequenceOfHClipPlane& V3d_View::GetClipPlanes() const
{
  return MyViewContext.ClipPlanes();
}