Pyramid

VTKEx/Cxx/GeometricObjects/Pyramid

Other languages

See (Python), (Java), (CSharp)

Question

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Code

Pyramid.cxx

#include <vtkActor.h>
#include <vtkCamera.h>
#include <vtkCellArray.h>
#include <vtkDataSetMapper.h>
#include <vtkNamedColors.h>
#include <vtkPoints.h>
#include <vtkProperty.h>
#include <vtkPyramid.h>
#include <vtkRenderer.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkSmartPointer.h>
#include <vtkUnstructuredGrid.h>

int main(int , char *[])
{
  vtkSmartPointer<vtkPoints> points = 
      vtkSmartPointer<vtkPoints>::New();

  float p0[3] = {1.0, 1.0, 1.0};
  float p1[3] = {-1.0, 1.0, 1.0};
  float p2[3] = {-1.0, -1.0, 1.0};
  float p3[3] = {1.0, -1.0, 1.0};
  float p4[3] = {0.0, 0.0, 0.0};

  points->InsertNextPoint(p0);
  points->InsertNextPoint(p1);
  points->InsertNextPoint(p2);
  points->InsertNextPoint(p3);
  points->InsertNextPoint(p4);

  vtkSmartPointer<vtkPyramid> pyramid = 
      vtkSmartPointer<vtkPyramid>::New();
  pyramid->GetPointIds()->SetId(0,0);
  pyramid->GetPointIds()->SetId(1,1);
  pyramid->GetPointIds()->SetId(2,2);
  pyramid->GetPointIds()->SetId(3,3);
  pyramid->GetPointIds()->SetId(4,4);

  vtkSmartPointer<vtkCellArray> cells = 
      vtkSmartPointer<vtkCellArray>::New();
  cells->InsertNextCell (pyramid);

  vtkSmartPointer<vtkUnstructuredGrid> ug = 
      vtkSmartPointer<vtkUnstructuredGrid>::New();
  ug->SetPoints(points);
  ug->InsertNextCell(pyramid->GetCellType(),pyramid->GetPointIds());

  //Create an actor and mapper
  vtkSmartPointer<vtkNamedColors> colors =
    vtkSmartPointer<vtkNamedColors>::New();
  vtkSmartPointer<vtkDataSetMapper> mapper = 
      vtkSmartPointer<vtkDataSetMapper>::New();
  mapper->SetInputData(ug);

  vtkSmartPointer<vtkActor> actor = 
      vtkSmartPointer<vtkActor>::New();
  actor->SetMapper(mapper);
  actor->GetProperty()->SetColor(colors->GetColor3d("Tomato").GetData());

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

  renderer->AddActor(actor);

  // Create a nice view
  renderer->ResetCamera();
  renderer->GetActiveCamera()->Azimuth(180);
  renderer->GetActiveCamera()->Elevation(-20);
  renderer->ResetCameraClippingRange();

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

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

  return EXIT_SUCCESS;
}

CMakeLists.txt

cmake_minimum_required(VERSION 3.3 FATAL_ERROR)

project(Pyramid)

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

Download and Build Pyramid

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

cd Pyramid/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:

./Pyramid

WINDOWS USERS

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