HideActor
VTKExamples/Cxx/Visualization/HideActor
Description
Display two spheres, then hide one, then hide both.
Code
HideActor.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 <vtkPropCollection.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);
sphereSource2->Update();
// 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 an image (lights and cameras are created automatically)
renderWindow->Render();
vtkSmartPointer<vtkInteractorStyleTrackballCamera> style =
vtkSmartPointer<vtkInteractorStyleTrackballCamera>::New(); //like paraview
renderWindowInteractor->SetInteractorStyle( style );
renderWindowInteractor->Start();
// Set the background to red so we know we are done with the original two sphere display
renderer->SetBackground(1,0,0);
// Hide one actor at a time
vtkPropCollection* props = renderer->GetViewProps(); //iterate through and set each visibility to 0
props->InitTraversal();
for(int i = 0; i < props->GetNumberOfItems(); i++)
{
props->GetNextProp()->VisibilityOff();
renderer->ResetCamera();
renderWindow->Render();
renderWindowInteractor->Start();
}
return EXIT_SUCCESS;
}
CMakeLists.txt
cmake_minimum_required(VERSION 2.8)
PROJECT(HideActor)
find_package(VTK REQUIRED)
include(${VTK_USE_FILE})
add_executable(HideActor MACOSX_BUNDLE HideActor.cxx)
target_link_libraries(HideActor ${VTK_LIBRARIES})
Download and Build HideActor
Click here to download HideActor and its CMakeLists.txt file. Once the tarball HideActor.tar has been downloaded and extracted,
cd HideActor/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:
./HideActor
WINDOWS USERS PLEASE NOTE: Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.