Glyph3DMapper

VTKEx/Cxx/Visualization/Glyph3DMapper

Question

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Code

Glyph3DMapper.cxx

#include <vtkSmartPointer.h>
#include <vtkCubeSource.h>
#include <vtkPolyData.h>
#include <vtkPoints.h>
#include <vtkFloatArray.h>
#include <vtkGlyph3DMapper.h>
#include <vtkNamedColors.h>
#include <vtkCamera.h>
#include <vtkCellArray.h>
#include <vtkActor.h>
#include <vtkPointData.h>
#include <vtkRenderWindow.h>
#include <vtkRenderer.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkUnsignedCharArray.h>

int main(int, char *[])
{
  vtkSmartPointer<vtkPoints> points = 
    vtkSmartPointer<vtkPoints>::New();
  points->InsertNextPoint(0,0,0);
  points->InsertNextPoint(1,1,1);
  points->InsertNextPoint(2,2,2);

  vtkSmartPointer<vtkFloatArray> scaleFactors =
    vtkSmartPointer<vtkFloatArray>::New();
  scaleFactors->SetNumberOfComponents(3);
  scaleFactors->SetName("Scale Factors");
  scaleFactors->InsertNextTuple3(0.7, 1.0, 1.0);
  scaleFactors->InsertNextTuple3(1.0, 0.7, 1.0);
  scaleFactors->InsertNextTuple3(1.0, 1.0, 0.7);

  vtkSmartPointer<vtkNamedColors> namedColors =
    vtkSmartPointer<vtkNamedColors>::New();

  vtkSmartPointer<vtkUnsignedCharArray> colors =
    vtkSmartPointer<vtkUnsignedCharArray>::New();
  colors->SetName("Colors");
  colors->SetNumberOfComponents(3);
  colors->InsertNextTypedTuple(namedColors->GetColor3ub("Red").GetData());
  colors->InsertNextTypedTuple(namedColors->GetColor3ub("Green").GetData());
  colors->InsertNextTypedTuple(namedColors->GetColor3ub("Blue").GetData());

  vtkSmartPointer<vtkPolyData> polydata = 
    vtkSmartPointer<vtkPolyData>::New();
  polydata->SetPoints(points);
  polydata->GetPointData()->AddArray(colors);
  polydata->GetPointData()->AddArray(scaleFactors);

  // Create anything you want here, we will use a cube for the demo.
  vtkSmartPointer<vtkCubeSource> cubeSource = 
    vtkSmartPointer<vtkCubeSource>::New();

  vtkSmartPointer<vtkGlyph3DMapper> glyph3Dmapper = 
    vtkSmartPointer<vtkGlyph3DMapper>::New();
  glyph3Dmapper->SetSourceConnection(cubeSource->GetOutputPort());
  glyph3Dmapper->SetInputData(polydata);
  glyph3Dmapper->SetScalarModeToUsePointFieldData();
  glyph3Dmapper->SetScaleArray("Scale Factors");
  glyph3Dmapper->SetScaleModeToScaleByVectorComponents();
  glyph3Dmapper->SelectColorArray("Colors");
  glyph3Dmapper->Update();

  vtkSmartPointer<vtkActor> actor = 
    vtkSmartPointer<vtkActor>::New();
  actor->SetMapper(glyph3Dmapper);

  // Create a renderer, render window, and interactor
  vtkSmartPointer<vtkRenderer> renderer = 
    vtkSmartPointer<vtkRenderer>::New();
  vtkSmartPointer<vtkRenderWindow> renderWindow = 
    vtkSmartPointer<vtkRenderWindow>::New();
  renderWindow->AddRenderer(renderer);
  vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor = 
    vtkSmartPointer<vtkRenderWindowInteractor>::New();
  renderWindowInteractor->SetRenderWindow(renderWindow);

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

  // Position the camera
  renderer->GetActiveCamera()->SetPosition(-10, 5, 0);
  renderer->GetActiveCamera()->SetFocalPoint(1, 1, 1);

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

  return EXIT_SUCCESS;
}

CMakeLists.txt

cmake_minimum_required(VERSION 3.3 FATAL_ERROR)

project(Glyph3DMapper)

find_package(VTK COMPONENTS 
  vtkvtkCommonColor
  vtkvtkCommonCore
  vtkvtkCommonDataModel
  vtkvtkFiltersSources
  vtkvtkInteractionStyle
  vtkvtkRenderingContextOpenGL2
  vtkvtkRenderingCore
  vtkvtkRenderingFreeType
  vtkvtkRenderingGL2PSOpenGL2
  vtkvtkRenderingOpenGL2 QUIET)
if (NOT VTK_FOUND)
  message("Skipping Glyph3DMapper: ${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(Glyph3DMapper MACOSX_BUNDLE Glyph3DMapper.cxx )
  target_link_libraries(Glyph3DMapper PRIVATE ${VTK_LIBRARIES})
else ()
  # include all components
  add_executable(Glyph3DMapper MACOSX_BUNDLE Glyph3DMapper.cxx )
  target_link_libraries(Glyph3DMapper PRIVATE ${VTK_LIBRARIES})
  # vtk_module_autoinit is needed
  vtk_module_autoinit(
    TARGETS Glyph3DMapper
    MODULES ${VTK_LIBRARIES}
    )
endif ()

Download and Build Glyph3DMapper

Click here to download Glyph3DMapper and its CMakeLists.txt file. Once the tarball Glyph3DMapper.tar has been downloaded and extracted,

cd Glyph3DMapper/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:

./Glyph3DMapper

WINDOWS USERS

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