MoveCamera
vtk-examples/Cxx/Visualization/MoveCamera
Description¶
This example creates two spheres. They will move together when the mouse is used to interact with the scene because the camera is actually what is moving causing the view of the spheres to change.
Other languages
See (Java)
Question
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Code¶
MoveCamera.cxx
#include <vtkActor.h>
#include <vtkInteractorStyleTrackballCamera.h>
#include <vtkNamedColors.h>
#include <vtkNew.h>
#include <vtkPolyData.h>
#include <vtkPolyDataMapper.h>
#include <vtkProperty.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderer.h>
#include <vtkSphereSource.h>
int main(int, char*[])
{
vtkNew<vtkNamedColors> colors;
// Sphere 1
vtkNew<vtkSphereSource> sphereSource1;
sphereSource1->SetCenter(0.0, 0.0, 0.0);
sphereSource1->SetRadius(4.0);
sphereSource1->Update();
vtkNew<vtkPolyDataMapper> mapper1;
mapper1->SetInputConnection(sphereSource1->GetOutputPort());
vtkNew<vtkActor> actor1;
actor1->SetMapper(mapper1);
actor1->GetProperty()->SetColor(colors->GetColor3d("MistyRose").GetData());
// Sphere 2
vtkNew<vtkSphereSource> sphereSource2;
sphereSource2->SetCenter(10.0, 0.0, 0.0);
sphereSource2->SetRadius(3.0);
sphereSource2->Update();
// Create a mapper
vtkNew<vtkPolyDataMapper> mapper2;
mapper2->SetInputConnection(sphereSource2->GetOutputPort());
// Create an actor
vtkNew<vtkActor> actor2;
actor2->SetMapper(mapper2);
actor2->GetProperty()->SetColor(colors->GetColor3d("Cornsilk").GetData());
// A renderer and render window
vtkNew<vtkRenderer> renderer;
vtkNew<vtkRenderWindow> renderWindow;
renderWindow->AddRenderer(renderer);
renderWindow->SetWindowName("MoveCamera");
// An interactor
vtkNew<vtkRenderWindowInteractor> renderWindowInteractor;
renderWindowInteractor->SetRenderWindow(renderWindow);
// Add the actors to the scene
renderer->AddActor(actor1);
renderer->AddActor(actor2);
renderer->SetBackground(colors->GetColor3d("DarkSlateGray").GetData());
// Render an image (lights and cameras are created automatically)
renderWindow->Render();
vtkSmartPointer<vtkInteractorStyleTrackballCamera> style =
vtkSmartPointer<vtkInteractorStyleTrackballCamera>::New();
renderWindowInteractor->SetInteractorStyle(style);
// Begin mouse interaction
renderWindowInteractor->Start();
return EXIT_SUCCESS;
}
CMakeLists.txt¶
cmake_minimum_required(VERSION 3.3 FATAL_ERROR)
project(MoveCamera)
find_package(VTK COMPONENTS
vtkCommonColor
vtkCommonCore
vtkCommonDataModel
vtkFiltersSources
vtkInteractionStyle
vtkRenderingContextOpenGL2
vtkRenderingCore
vtkRenderingFreeType
vtkRenderingGL2PSOpenGL2
vtkRenderingOpenGL2
QUIET
)
if (NOT VTK_FOUND)
message("Skipping MoveCamera: ${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(MoveCamera MACOSX_BUNDLE MoveCamera.cxx )
target_link_libraries(MoveCamera PRIVATE ${VTK_LIBRARIES})
else ()
# include all components
add_executable(MoveCamera MACOSX_BUNDLE MoveCamera.cxx )
target_link_libraries(MoveCamera PRIVATE ${VTK_LIBRARIES})
# vtk_module_autoinit is needed
vtk_module_autoinit(
TARGETS MoveCamera
MODULES ${VTK_LIBRARIES}
)
endif ()
Download and Build MoveCamera¶
Click here to download MoveCamera and its CMakeLists.txt file. Once the tarball MoveCamera.tar has been downloaded and extracted,
cd MoveCamera/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:
./MoveCamera
WINDOWS USERS
Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.