VTK/Examples/Cxx/Visualization/MultipleActors

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VTK Examples Baseline Visualization TestMultipleActors.png

This example creates two spheres and renders them. The idea is to show that each object needs its own mapper and actor and then multiple actors can be added to a renderer.

MultipleActors.cxx

#include <vtkPolyDataMapper.h>
#include <vtkActor.h>
#include <vtkRenderWindow.h>
#include <vtkRenderer.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkPolyData.h>
#include <vtkSmartPointer.h>
#include <vtkSphereSource.h>
#include <vtkInteractorStyleTrackballCamera.h>
#include <vtkInteractorStyleTrackball.h>
 
int main (int, char *[])
{
  // Sphere 1
  vtkSmartPointer<vtkSphereSource> sphereSource1 = 
    vtkSmartPointer<vtkSphereSource>::New();
  sphereSource1->SetCenter(0.0, 0.0, 0.0);
  sphereSource1->SetRadius(4.0);
  sphereSource1->Update();
 
  vtkSmartPointer<vtkPolyDataMapper> mapper1 = 
    vtkSmartPointer<vtkPolyDataMapper>::New();
  mapper1->SetInputConnection(sphereSource1->GetOutputPort());
 
  vtkSmartPointer<vtkActor> actor1 = 
    vtkSmartPointer<vtkActor>::New();
  actor1->SetMapper(mapper1);
 
  // Sphere 2
  vtkSmartPointer<vtkSphereSource> sphereSource2 = 
    vtkSmartPointer<vtkSphereSource>::New();
  sphereSource2->SetCenter(10.0, 0.0, 0.0);
  sphereSource2->SetRadius(3.0);
 
  // Create a mapper
  vtkSmartPointer<vtkPolyDataMapper> mapper2 = 
    vtkSmartPointer<vtkPolyDataMapper>::New();
  mapper2->SetInputConnection(sphereSource2->GetOutputPort());
 
  // Create an actor
  vtkSmartPointer<vtkActor> actor2 = 
    vtkSmartPointer<vtkActor>::New();
  actor2->SetMapper(mapper2);
 
  // A renderer and render window
  vtkSmartPointer<vtkRenderer> renderer = 
    vtkSmartPointer<vtkRenderer>::New();
  vtkSmartPointer<vtkRenderWindow> renderWindow = 
    vtkSmartPointer<vtkRenderWindow>::New();
  renderWindow->AddRenderer(renderer);
 
  // An interactor
  vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor = 
    vtkSmartPointer<vtkRenderWindowInteractor>::New();
  renderWindowInteractor->SetRenderWindow(renderWindow);
 
  // Add the actors to the scene
  renderer->AddActor(actor1);
  renderer->AddActor(actor2);
  renderer->SetBackground(1,1,1); // Background color white
 
  // Render
  renderWindow->Render();
 
  vtkSmartPointer<vtkInteractorStyleTrackballCamera> style = 
    vtkSmartPointer<vtkInteractorStyleTrackballCamera>::New(); //like paraview
 
  renderWindowInteractor->SetInteractorStyle( style );
 
  // Begin mouse interaction
  renderWindowInteractor->Start();
 
  return EXIT_SUCCESS;
}

CMakeLists.txt

cmake_minimum_required(VERSION 2.8)
 
PROJECT(MultipleActors)
 
find_package(VTK REQUIRED)
include(${VTK_USE_FILE})
 
if (APPLE)
  add_executable(MultipleActors MACOSX_BUNDLE MultipleActors.cxx)
else()
  add_executable(MultipleActors MultipleActors.cxx)
endif()
 
if(VTK_LIBRARIES)
  target_link_libraries(MultipleActors ${VTK_LIBRARIES})
else()
  target_link_libraries(MultipleActors vtkHybrid )
endif()


Object and background color.

Retrieved from "http://www.vtk.org/Wiki/VTK/Examples/Cxx/Visualization/MultipleActors"
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