/*==================================================================

  Program:   Visualization Toolkit
  Module:    TestHyperTreeGridToDualGrid.cxx

  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
  All rights reserved.
  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.

     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notice for more information.

===================================================================*/
// This test verifies that VTK can obtain the dual grid representation
// for a HyperTreeGrid.

#include "vtkHyperTreeGridGeometry.h"
#include "vtkHyperTreeGridSource.h"

#include "vtkCamera.h"
#include "vtkCellData.h"
#include "vtkDataSetMapper.h"
#include "vtkHyperTreeGridToDualGrid.h"
#include "vtkHyperTreeGridToUnstructuredGrid.h"
#include "vtkNew.h"
#include "vtkPolyData.h"
#include "vtkProperty.h"
#include "vtkRegressionTestImage.h"
#include "vtkRenderer.h"
#include "vtkRenderWindow.h"
#include "vtkRenderWindowInteractor.h"
#include "vtkUnstructuredGrid.h"

#include "vtkDataSetWriter.h"

int TestHyperTreeGridToDualGrid( int argc, char* argv[] )
{
  // Writer for debug
  // vtkNew<vtkDataSetWriter> writer;

  // Hyper tree grid
  vtkNew<vtkHyperTreeGridSource> htGrid;
  int maxLevel = 6;
  htGrid->SetMaximumLevel( maxLevel );
  htGrid->SetDimensions( 3, 4, 1 ); //Dimension 2 in xy plane GridCell 2, 3
  htGrid->SetGridScale( 1.5, 1., 10. );  // this is to test that orientation fixes scale
  htGrid->SetBranchFactor( 2 );
  htGrid->SetDescriptor( "RRRRR.|.... .R.. RRRR R... R...|.R.. ...R ..RR .R.. R... .... ....|.... ...R ..R. .... .R.. R...|.... .... .R.. ....|...." );

  // Geometry
  vtkNew<vtkHyperTreeGridToDualGrid> dualfilter;
  dualfilter->SetInputConnection( htGrid->GetOutputPort() );
  dualfilter->Update();
  vtkUnstructuredGrid *dual = vtkUnstructuredGrid::SafeDownCast(dualfilter->GetOutput());
  // dual->PrintSelf(cerr, vtkIndent(0));
  // writer->SetFileName("fooDual.vtk");
  // writer->SetInputData(dual);
  // writer->Write();

  vtkNew<vtkHyperTreeGridToUnstructuredGrid> gfilter;
  gfilter->SetInputConnection( htGrid->GetOutputPort() );
  gfilter->Update();
  // vtkUnstructuredGrid *primal = vtkUnstructuredGrid::SafeDownCast(gfilter->GetOutput());
  // writer->SetFileName("fooPrimal.vtk");
  // writer->SetInputData(primal);
  // writer->Write();

  vtkNew<vtkHyperTreeGridGeometry> sfilter;
  sfilter->SetInputConnection( htGrid->GetOutputPort() );
  sfilter->Update();
  // vtkPolyData *skin = vtkPolyData::SafeDownCast(sfilter->GetOutput());
  // writer->SetFileName("fooSkin.vtk");
  // writer->SetInputData(skin);
  // writer->Write();

  // Mappers
  vtkMapper::SetResolveCoincidentTopologyToPolygonOffset();
  vtkNew<vtkDataSetMapper> mapper1;
  mapper1->SetInputConnection( dualfilter->GetOutputPort() );
  //mapper1->SetScalarRange( dual->GetCellData()->GetScalars()->GetRange() ); //no cell data yet
  vtkNew<vtkDataSetMapper> mapper2;
  mapper2->SetInputConnection( dualfilter->GetOutputPort() );
  mapper2->ScalarVisibilityOff();

  // Actors
  vtkNew<vtkActor> actor1;
  actor1->SetMapper( mapper1 );
  vtkNew<vtkActor> actor2;
  actor2->SetMapper( mapper2 );
  actor2->GetProperty()->SetRepresentationToWireframe();
  actor2->GetProperty()->SetColor( .7, .7, .7 );

  // Camera
  double bd[6];
  dual->GetBounds( bd );
  vtkNew<vtkCamera> camera;
  camera->SetClippingRange( 1., 100. );
  camera->SetFocalPoint( dual->GetCenter() );
  camera->SetPosition( .5 * (bd[0] + bd[1]), .5 *(bd[2] + bd[3]), 6. );

  // Renderer
  vtkNew<vtkRenderer> renderer;
  renderer->SetActiveCamera( camera );
  renderer->SetBackground( 1., 1., 1. );
  renderer->AddActor( actor1 );
  renderer->AddActor( actor2 );

  // Render window
  vtkNew<vtkRenderWindow> renWin;
  renWin->AddRenderer( renderer );
  renWin->SetSize( 400, 400 );
  renWin->SetMultiSamples( 0 );

  // Interactor
  vtkNew<vtkRenderWindowInteractor> iren;
  iren->SetRenderWindow( renWin );

  // Render and test
  renWin->Render();

  int retVal = vtkRegressionTestImageThreshold( renWin, 2 );
  if ( retVal == vtkRegressionTester::DO_INTERACTOR )
  {
    iren->Start();
  }

  return !retVal;
}
