ImageNoiseSource
vtk-examples/Cxx/Images/ImageNoiseSource
Question
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Code¶
ImageNoiseSource.cxx
#include <vtkImageActor.h>
#include <vtkImageCast.h>
#include <vtkImageData.h>
#include <vtkImageMapper3D.h>
#include <vtkImageNoiseSource.h>
#include <vtkInteractorStyleImage.h>
#include <vtkNamedColors.h>
#include <vtkNew.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderer.h>
int main(int, char*[])
{
vtkNew<vtkNamedColors> colors;
// Create an image of noise
vtkNew<vtkImageNoiseSource> noiseSource;
noiseSource->SetWholeExtent(0, 200, 0, 200, 0, 0);
noiseSource->SetMinimum(0.0);
noiseSource->SetMaximum(255.0);
vtkNew<vtkImageCast> castFilter;
castFilter->SetInputConnection(noiseSource->GetOutputPort());
castFilter->SetOutputScalarTypeToUnsignedChar();
// Create an actor
vtkNew<vtkImageActor> actor;
actor->GetMapper()->SetInputConnection(castFilter->GetOutputPort());
// Setup renderer
vtkNew<vtkRenderer> renderer;
renderer->AddActor(actor);
renderer->ResetCamera();
renderer->SetBackground(colors->GetColor3d("Wheat").GetData());
// Setup render window
vtkNew<vtkRenderWindow> renderWindow;
renderWindow->SetWindowName("ImageNoiseSource");
renderWindow->AddRenderer(renderer);
// Setup render window interactor
vtkNew<vtkRenderWindowInteractor> renderWindowInteractor;
vtkNew<vtkInteractorStyleImage> style;
renderWindowInteractor->SetInteractorStyle(style);
// Render and start interaction
renderWindowInteractor->SetRenderWindow(renderWindow);
renderWindow->Render();
renderWindowInteractor->Start();
return EXIT_SUCCESS;
}
CMakeLists.txt¶
cmake_minimum_required(VERSION 3.3 FATAL_ERROR)
project(ImageNoiseSource)
find_package(VTK COMPONENTS
vtkCommonColor
vtkCommonCore
vtkCommonDataModel
vtkImagingCore
vtkImagingSources
vtkInteractionStyle
vtkRenderingContextOpenGL2
vtkRenderingCore
vtkRenderingFreeType
vtkRenderingGL2PSOpenGL2
vtkRenderingOpenGL2
QUIET
)
if (NOT VTK_FOUND)
message("Skipping ImageNoiseSource: ${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(ImageNoiseSource MACOSX_BUNDLE ImageNoiseSource.cxx )
target_link_libraries(ImageNoiseSource PRIVATE ${VTK_LIBRARIES})
else ()
# include all components
add_executable(ImageNoiseSource MACOSX_BUNDLE ImageNoiseSource.cxx )
target_link_libraries(ImageNoiseSource PRIVATE ${VTK_LIBRARIES})
# vtk_module_autoinit is needed
vtk_module_autoinit(
TARGETS ImageNoiseSource
MODULES ${VTK_LIBRARIES}
)
endif ()
Download and Build ImageNoiseSource¶
Click here to download ImageNoiseSource and its CMakeLists.txt file. Once the tarball ImageNoiseSource.tar has been downloaded and extracted,
cd ImageNoiseSource/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:
./ImageNoiseSource
WINDOWS USERS
Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.