ImageSliceMapper
vtk-examples/Cxx/Images/ImageSliceMapper
Question
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Code¶
ImageSliceMapper.cxx
#include <vtkImageData.h>
#include <vtkImageMapper.h>
#include <vtkImageSlice.h>
#include <vtkImageSliceMapper.h>
#include <vtkInteractorStyleImage.h>
#include <vtkNamedColors.h>
#include <vtkNew.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderer.h>
#include <vtkSmartPointer.h>
namespace {
void CreateColorImage(vtkImageData*);
}
int main(int, char*[])
{
vtkNew<vtkNamedColors> colors;
vtkNew<vtkImageData> colorImage;
CreateColorImage(colorImage);
vtkNew<vtkImageSliceMapper> imageSliceMapper;
imageSliceMapper->SetInputData(colorImage);
vtkNew<vtkImageSlice> imageSlice;
imageSlice->SetMapper(imageSliceMapper);
// Setup renderers
vtkNew<vtkRenderer> renderer;
renderer->AddViewProp(imageSlice);
renderer->ResetCamera();
renderer->SetBackground(colors->GetColor3d("NavajoWhite").GetData());
// Setup render window
vtkNew<vtkRenderWindow> renderWindow;
renderWindow->SetSize(300, 300);
renderWindow->AddRenderer(renderer);
renderWindow->SetWindowName("ImageSliceMapper");
// Setup render window interactor
vtkNew<vtkRenderWindowInteractor> renderWindowInteractor;
vtkNew<vtkInteractorStyleImage> style;
renderWindowInteractor->SetInteractorStyle(style);
// Render and start interaction
renderWindowInteractor->SetRenderWindow(renderWindow);
renderWindow->Render();
renderWindowInteractor->Initialize();
renderWindowInteractor->Start();
return EXIT_SUCCESS;
}
namespace {
void CreateColorImage(vtkImageData* image)
{
image->SetDimensions(10, 10, 1);
image->AllocateScalars(VTK_UNSIGNED_CHAR, 3);
vtkNew<vtkNamedColors> colors;
auto pixelColor = colors->GetColor3ub("Turquoise").GetData();
for (unsigned int x = 0; x < 10; x++)
{
for (unsigned int y = 0; y < 10; y++)
{
unsigned char* pixel =
static_cast<unsigned char*>(image->GetScalarPointer(x, y, 0));
for (auto j = 0; j < 3; ++j)
{
pixel[j] = pixelColor[j];
}
}
}
}
} // namespace
CMakeLists.txt¶
cmake_minimum_required(VERSION 3.3 FATAL_ERROR)
project(ImageSliceMapper)
find_package(VTK COMPONENTS
vtkCommonColor
vtkCommonCore
vtkCommonDataModel
vtkInteractionStyle
vtkRenderingContextOpenGL2
vtkRenderingCore
vtkRenderingFreeType
vtkRenderingGL2PSOpenGL2
vtkRenderingOpenGL2
QUIET
)
if (NOT VTK_FOUND)
message("Skipping ImageSliceMapper: ${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(ImageSliceMapper MACOSX_BUNDLE ImageSliceMapper.cxx )
target_link_libraries(ImageSliceMapper PRIVATE ${VTK_LIBRARIES})
else ()
# include all components
add_executable(ImageSliceMapper MACOSX_BUNDLE ImageSliceMapper.cxx )
target_link_libraries(ImageSliceMapper PRIVATE ${VTK_LIBRARIES})
# vtk_module_autoinit is needed
vtk_module_autoinit(
TARGETS ImageSliceMapper
MODULES ${VTK_LIBRARIES}
)
endif ()
Download and Build ImageSliceMapper¶
Click here to download ImageSliceMapper and its CMakeLists.txt file. Once the tarball ImageSliceMapper.tar has been downloaded and extracted,
cd ImageSliceMapper/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:
./ImageSliceMapper
WINDOWS USERS
Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.