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Reflection

vtk-examples/Cxx/PolyData/Reflection


Description

Note

This example uses vtkReflectionFilter, which outputs a vtkDataObject. For an example that returns a vtkPolyData, see TransformPolyData.

Other languages

See (Java)

Question

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

Code

Reflection.cxx

#include <vtkActor.h>
#include <vtkConeSource.h>
#include <vtkDataSetMapper.h>
#include <vtkNamedColors.h>
#include <vtkNew.h>
#include <vtkPolyData.h>
#include <vtkPolyDataMapper.h>
#include <vtkProperty.h>
#include <vtkReflectionFilter.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderer.h>

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

  vtkNew<vtkConeSource> coneSource;
  coneSource->Update();

  vtkNew<vtkPolyDataMapper> coneMapper;
  coneMapper->SetInputConnection(coneSource->GetOutputPort());
  vtkNew<vtkActor> coneActor;
  coneActor->SetMapper(coneMapper);
  coneActor->GetProperty()->SetColor(colors->GetColor3d("Mint").GetData());

  // Reflection
  vtkNew<vtkReflectionFilter> reflectionFilter;
  reflectionFilter->SetInputConnection(coneSource->GetOutputPort());
  reflectionFilter->CopyInputOff();
  reflectionFilter->Update();

  vtkNew<vtkDataSetMapper> reflectionMapper;
  reflectionMapper->SetInputConnection(reflectionFilter->GetOutputPort());
  vtkNew<vtkActor> reflectionActor;
  reflectionActor->SetMapper(reflectionMapper);
  reflectionActor->GetProperty()->SetColor(
      colors->GetColor3d("Tomato").GetData());

  // Create a renderer, render window, and interactor
  vtkNew<vtkRenderer> renderer;
  vtkNew<vtkRenderWindow> renderWindow;
  renderWindow->SetSize(640, 480);
  renderWindow->AddRenderer(renderer);
  renderWindow->SetWindowName("Reflection");

  vtkNew<vtkRenderWindowInteractor> renderWindowInteractor;
  renderWindowInteractor->SetRenderWindow(renderWindow);

  // Add the actor to the scene
  renderer->AddActor(coneActor);
  renderer->AddActor(reflectionActor);
  renderer->SetBackground(colors->GetColor3d("Burlywood").GetData());

  // Render and interact
  renderWindow->Render();
  renderWindowInteractor->Start();
  return EXIT_SUCCESS;
}

CMakeLists.txt

cmake_minimum_required(VERSION 3.12 FATAL_ERROR)

project(Reflection)

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

if (NOT VTK_FOUND)
  message(FATAL_ERROR "Reflection: 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(Reflection MACOSX_BUNDLE Reflection.cxx )
  target_link_libraries(Reflection PRIVATE ${VTK_LIBRARIES}
)
# vtk_module_autoinit is needed
vtk_module_autoinit(
  TARGETS Reflection
  MODULES ${VTK_LIBRARIES}
)

Download and Build Reflection

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

cd Reflection/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:

./Reflection

WINDOWS USERS

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