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LegendScaleActor

vtk-examples/Cxx/Visualization/LegendScaleActor


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See (Java)

Question

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Code

LegendScaleActor.cxx

#include <vtkActor.h>
#include <vtkLegendScaleActor.h>
#include <vtkNamedColors.h>
#include <vtkNew.h>
#include <vtkParametricEnneper.h>
#include <vtkParametricFunctionSource.h>
#include <vtkPolyData.h>
#include <vtkPolyDataMapper.h>
#include <vtkProperty.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderer.h>

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

  // The next source will be a parametric function
  vtkNew<vtkParametricEnneper> src;
  vtkNew<vtkParametricFunctionSource> fnSrc;
  fnSrc->SetParametricFunction(src);

  // Create a mapper and actor
  vtkNew<vtkPolyDataMapper> mapper;
  mapper->SetInputConnection(fnSrc->GetOutputPort());
  vtkNew<vtkActor> actor;
  actor->SetMapper(mapper);
  actor->GetProperty()->SetColor(colors->GetColor3d("MistyRose").GetData());

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

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

  vtkNew<vtkLegendScaleActor> legendScaleActor;

  // Add the actor to the scene
  renderer->AddActor(actor);
  renderer->AddActor(legendScaleActor);

  renderer->SetBackground(colors->GetColor3d("RoyalBlue").GetData());

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

  return EXIT_SUCCESS;
}

CMakeLists.txt

cmake_minimum_required(VERSION 3.3 FATAL_ERROR)

project(LegendScaleActor)

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

if (NOT VTK_FOUND)
  message("Skipping LegendScaleActor: ${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(LegendScaleActor MACOSX_BUNDLE LegendScaleActor.cxx )
  target_link_libraries(LegendScaleActor PRIVATE ${VTK_LIBRARIES})
else ()
  # include all components
  add_executable(LegendScaleActor MACOSX_BUNDLE LegendScaleActor.cxx )
  target_link_libraries(LegendScaleActor PRIVATE ${VTK_LIBRARIES})
  # vtk_module_autoinit is needed
  vtk_module_autoinit(
    TARGETS LegendScaleActor
    MODULES ${VTK_LIBRARIES}
    )
endif ()

Download and Build LegendScaleActor

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

cd LegendScaleActor/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:

./LegendScaleActor

WINDOWS USERS

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