SideBySideViewports

Description¶

This example splits the window into a left and right side. A sphere is drawn on the left and a cube is drawn on the right.

Other languages

See (Java)

Question

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

Code¶

SideBySideViewports.cxx

#include <vtkActor.h>
#include <vtkCamera.h>
#include <vtkCubeSource.h>
#include <vtkNamedColors.h>
#include <vtkNew.h>
#include <vtkPolyDataMapper.h>
#include <vtkProperty.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderer.h>
#include <vtkSphereSource.h>
#include <vtkVertexGlyphFilter.h>
#include <vtkXMLPolyDataReader.h>

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

  // Setup a sphere.
  vtkNew<vtkSphereSource> sphereSource;
  sphereSource->Update();
  vtkNew<vtkPolyDataMapper> sphereMapper;
  sphereMapper->SetInputConnection(sphereSource->GetOutputPort());
  vtkNew<vtkActor> sphereActor;
  sphereActor->SetMapper(sphereMapper);
  sphereActor->GetProperty()->SetColor(
      colors->GetColor3d("MistyRose").GetData());

  // Setup a cube.
  vtkNew<vtkCubeSource> cubeSource;
  cubeSource->Update();
  vtkNew<vtkPolyDataMapper> cubeMapper;
  cubeMapper->SetInputConnection(cubeSource->GetOutputPort());
  vtkNew<vtkActor> cubeActor;
  cubeActor->SetMapper(cubeMapper);
  cubeActor->GetProperty()->SetColor(
      colors->GetColor3d("MediumSeaGreen").GetData());

  // There will be one render window.
  vtkNew<vtkRenderWindow> renderWindow;
  renderWindow->SetSize(600, 300);
  renderWindow->SetWindowName("SideBySideViewports");

  // And one interactor
  vtkNew<vtkRenderWindowInteractor> interactor;
  interactor->SetRenderWindow(renderWindow);

  // Define viewport ranges.
  // (xmin, ymin, xmax, ymax)
  double leftViewport[4] = {0.0, 0.0, 0.5, 1.0};
  double rightViewport[4] = {0.5, 0.0, 1.0, 1.0};

  // Setup both renderers
  vtkNew<vtkRenderer> leftRenderer;
  renderWindow->AddRenderer(leftRenderer);
  leftRenderer->SetViewport(leftViewport);
  leftRenderer->SetBackground(colors->GetColor3d("BurlyWood").GetData());

  vtkNew<vtkRenderer> rightRenderer;
  renderWindow->AddRenderer(rightRenderer);
  rightRenderer->SetViewport(rightViewport);
  rightRenderer->SetBackground(colors->GetColor3d("CadetBlue").GetData());

  // Add the sphere to the left and the cube to the right.
  leftRenderer->AddActor(sphereActor);
  rightRenderer->AddActor(cubeActor);

  leftRenderer->ResetCamera();

  rightRenderer->ResetCamera();
  rightRenderer->GetActiveCamera()->Azimuth(30);
  rightRenderer->GetActiveCamera()->Elevation(30);

  renderWindow->Render();
  interactor->Start();

  return EXIT_SUCCESS;
}

CMakeLists.txt¶

cmake_minimum_required(VERSION 3.12 FATAL_ERROR)

project(SideBySideViewports)

find_package(VTK COMPONENTS 
  CommonColor
  CommonCore
  FiltersGeneral
  FiltersSources
  IOXML
  InteractionStyle
  RenderingContextOpenGL2
  RenderingCore
  RenderingFreeType
  RenderingGL2PSOpenGL2
  RenderingOpenGL2
)

if (NOT VTK_FOUND)
  message(FATAL_ERROR "SideBySideViewports: Unable to find the VTK build folder.")
endif()

# Prevent a "command line is too long" failure in Windows.
set(CMAKE_NINJA_FORCE_RESPONSE_FILE "ON" CACHE BOOL "Force Ninja to use response files.")
add_executable(SideBySideViewports MACOSX_BUNDLE SideBySideViewports.cxx )
  target_link_libraries(SideBySideViewports PRIVATE ${VTK_LIBRARIES}
)
# vtk_module_autoinit is needed
vtk_module_autoinit(
  TARGETS SideBySideViewports
  MODULES ${VTK_LIBRARIES}
)

Download and Build SideBySideViewports¶

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

cd SideBySideViewports/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:

./SideBySideViewports

WINDOWS USERS

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