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MultipleViewports

vtk-examples/Cxx/Visualization/MultipleViewports


Description

This example creates a window with 4 viewports.

Other languages

See (Python), (Java)

Question

If you have a question about this example, please use the VTK Discourse Forum

Code

MultipleViewports.cxx

#include <vtkActor.h>
#include <vtkNamedColors.h>
#include <vtkNew.h>
#include <vtkPolyData.h>
#include <vtkPolyDataMapper.h>
#include <vtkProperty.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderer.h>
#include <vtkSphereSource.h>

#include <vector>

int main(int, char*[])
{
  vtkNew<vtkNamedColors> colors;

  vtkNew<vtkRenderWindow> renderWindow;

  vtkNew<vtkRenderWindowInteractor> renderWindowInteractor;

  renderWindowInteractor->SetRenderWindow(renderWindow);

  // Define viewport ranges
  double xmins[4] = {0, .5, 0, .5};
  double xmaxs[4] = {0.5, 1, 0.5, 1};
  double ymins[4] = {0, 0, .5, .5};
  double ymaxs[4] = {0.5, 0.5, 1, 1};
  // Have some fun with colors
  std::vector<std::string> renBkg{"AliceBlue", "GhostWhite", "WhiteSmoke",
                                  "Seashell"};
  std::vector<std::string> actorColor{"Bisque", "RosyBrown", "Goldenrod",
                                      "Chocolate"};

  for (unsigned i = 0; i < 4; i++)
  {
    vtkNew<vtkRenderer> renderer;

    renderWindow->AddRenderer(renderer);
    renderer->SetViewport(xmins[i], ymins[i], xmaxs[i], ymaxs[i]);

    // Create a sphere
    vtkNew<vtkSphereSource> sphereSource;
    sphereSource->SetCenter(0.0, 0.0, 0.0);
    sphereSource->SetRadius(5);
    sphereSource->Update();

    // Create a mapper and actor
    vtkNew<vtkPolyDataMapper> mapper;
    mapper->SetInputConnection(sphereSource->GetOutputPort());
    vtkNew<vtkActor> actor;
    actor->SetMapper(mapper);
    actor->GetProperty()->SetColor(colors->GetColor3d(actorColor[i]).GetData());

    renderer->AddActor(actor);
    renderer->SetBackground(colors->GetColor3d(renBkg[i]).GetData());

    renderer->ResetCamera();
  }
  renderWindow->Render();
  renderWindow->SetWindowName("MultipleViewPorts");

  renderWindowInteractor->Start();

  return EXIT_SUCCESS;
}

CMakeLists.txt

cmake_minimum_required(VERSION 3.3 FATAL_ERROR)

project(MultipleViewports)

find_package(VTK COMPONENTS 
  vtkCommonColor
  vtkCommonCore
  vtkCommonDataModel
  vtkFiltersSources
  vtkInteractionStyle
  vtkRenderingContextOpenGL2
  vtkRenderingCore
  vtkRenderingFreeType
  vtkRenderingGL2PSOpenGL2
  vtkRenderingOpenGL2
  QUIET
)

if (NOT VTK_FOUND)
  message("Skipping MultipleViewports: ${VTK_NOT_FOUND_MESSAGE}")
  return ()
endif()
message (STATUS "VTK_VERSION: ${VTK_VERSION}")
if (VTK_VERSION VERSION_LESS "8.90.0")
  # old system
  include(${VTK_USE_FILE})
  add_executable(MultipleViewports MACOSX_BUNDLE MultipleViewports.cxx )
  target_link_libraries(MultipleViewports PRIVATE ${VTK_LIBRARIES})
else ()
  # include all components
  add_executable(MultipleViewports MACOSX_BUNDLE MultipleViewports.cxx )
  target_link_libraries(MultipleViewports PRIVATE ${VTK_LIBRARIES})
  # vtk_module_autoinit is needed
  vtk_module_autoinit(
    TARGETS MultipleViewports
    MODULES ${VTK_LIBRARIES}
    )
endif ()

Download and Build MultipleViewports

Click here to download MultipleViewports and its CMakeLists.txt file. Once the tarball MultipleViewports.tar has been downloaded and extracted,

cd MultipleViewports/build

If VTK is installed:

cmake ..

If VTK is not installed but compiled on your system, you will need to specify the path to your VTK build:

cmake -DVTK_DIR:PATH=/home/me/vtk_build ..

Build the project:

make

and run it:

./MultipleViewports

WINDOWS USERS

Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.