text: /*=========================================================================
  
    Program:   Visualization Toolkit
    Module:    TestRendererType.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 we can switch between a variety of raytraced
  // rendering modes.
  //
  // The command line arguments are:
  // -I        => run in interactive mode; unless this is used, the program will
  //              not allow interaction and exit
  //              In interactive mode it responds to the keys listed
  //              vtkOSPRayTestInteractor.h
  
  #include "vtkTestUtilities.h"
  
  #include "vtkActor.h"
  #include "vtkCamera.h"
  #include "vtkOSPRayPass.h"
  #include "vtkOSPRayRendererNode.h"
  #include "vtkOpenGLRenderer.h"
  #include "vtkPLYReader.h"
  #include "vtkPolyDataMapper.h"
  #include "vtkPolyDataNormals.h"
  #include "vtkRenderWindow.h"
  #include "vtkRenderWindowInteractor.h"
  #include "vtkRenderer.h"
  #include "vtkSmartPointer.h"
  
  #include "vtkOSPRayTestInteractor.h"
  
  int TestRendererType(int argc, char* argv[])
  {
    vtkSmartPointer<vtkRenderWindowInteractor> iren =
      vtkSmartPointer<vtkRenderWindowInteractor>::New();
    vtkSmartPointer<vtkRenderWindow> renWin = vtkSmartPointer<vtkRenderWindow>::New();
    iren->SetRenderWindow(renWin);
    vtkSmartPointer<vtkRenderer> renderer = vtkSmartPointer<vtkRenderer>::New();
    renWin->AddRenderer(renderer);
  
    const char* fileName = vtkTestUtilities::ExpandDataFileName(argc, argv, "Data/bunny.ply");
    vtkSmartPointer<vtkPLYReader> polysource = vtkSmartPointer<vtkPLYReader>::New();
    polysource->SetFileName(fileName);
  
    // TODO: ospray acts strangely without these such that Diff and Spec are not 0..255 instead of
    // 0..1
    vtkSmartPointer<vtkPolyDataNormals> normals = vtkSmartPointer<vtkPolyDataNormals>::New();
    normals->SetInputConnection(polysource->GetOutputPort());
    // normals->ComputePointNormalsOn();
    // normals->ComputeCellNormalsOff();
  
    vtkSmartPointer<vtkPolyDataMapper> mapper = vtkSmartPointer<vtkPolyDataMapper>::New();
    mapper->SetInputConnection(normals->GetOutputPort());
    vtkSmartPointer<vtkActor> actor = vtkSmartPointer<vtkActor>::New();
    renderer->AddActor(actor);
    actor->SetMapper(mapper);
    renderer->SetBackground(0.1, 0.1, 1.0);
    renWin->SetSize(400, 400);
    renWin->Render();
  
    vtkSmartPointer<vtkOSPRayPass> ospray = vtkSmartPointer<vtkOSPRayPass>::New();
    renderer->SetPass(ospray);
  
    for (int i = 1; i < 9; i++)
    {
      switch (i % 3)
      {
        case 0:
          cerr << "Render via scivis" << endl;
          vtkOSPRayRendererNode::SetRendererType("scivis", renderer);
          break;
        case 1:
          cerr << "Render via ospray pathtracer" << endl;
          vtkOSPRayRendererNode::SetRendererType("pathtracer", renderer);
          break;
        case 2:
          cerr << "Render via optix pathracer" << endl;
          vtkOSPRayRendererNode::SetRendererType("optix pathtracer", renderer);
          break;
      }
      for (int j = 0; j < 10; j++)
      {
        renWin->Render();
      }
    }
  
    vtkSmartPointer<vtkOSPRayTestInteractor> style = vtkSmartPointer<vtkOSPRayTestInteractor>::New();
    style->SetPipelineControlPoints(renderer, ospray, nullptr);
    iren->SetInteractorStyle(style);
    style->SetCurrentRenderer(renderer);
  
    iren->Start();
  
    return 0;
  }
  