OCCT

// Created by: Anastasia BORISOVA
// Copyright (c) 2016 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 <AIS_AnimationCamera.hxx>

#include <V3d_View.hxx>

IMPLEMENT_STANDARD_RTTIEXT(AIS_AnimationCamera, AIS_Animation)

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

AIS_AnimationCamera::AIS_AnimationCamera(const TCollection_AsciiString& theAnimationName,
                                         const occ::handle<V3d_View>&   theView)
    : AIS_Animation(theAnimationName),
      myView(theView)
{
}

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

void AIS_AnimationCamera::update(const AIS_AnimationProgress& theProgress)
{
  if (myView.IsNull() || myCamStart.IsNull() || myCamEnd.IsNull())
  {
    return;
  }

  occ::handle<Graphic3d_Camera> aCamera = myView->Camera();

  NCollection_Lerp<occ::handle<Graphic3d_Camera>> aCamLerp(myCamStart, myCamEnd);
  aCamLerp.Interpolate(HasOwnDuration() ? theProgress.LocalNormalized : 1.0, aCamera);

  const bool aPrevImmUpdate = myView->SetImmediateUpdate(false);
  myView->SetCamera(aCamera);
  myView->SetImmediateUpdate(aPrevImmUpdate);
  myView->Invalidate();
}