NegativeIndices
VTKExamples/Cxx/Images/NegativeIndices
Code¶
NegativeIndices.cxx
#include <vtkVersion.h> #include <vtkSmartPointer.h> #include <vtkImageData.h> int main(int, char *[]) { // Create an image data vtkSmartPointer<vtkImageData> imageData = vtkSmartPointer<vtkImageData>::New(); // Specify the size of the image data imageData->SetExtent(-5, 5, -5, 5, -5, 5); // Fill every entry of the image data with "2.0" int* extent = imageData->GetExtent(); #if VTK_MAJOR_VERSION <= 5 imageData->SetNumberOfScalarComponents(1); #else imageData->AllocateScalars(VTK_UNSIGNED_CHAR,1); #endif std::cout << "Extent: " << " xmin: " << extent[0] << " xmax: " << extent[1] << " ymin: " << extent[2] << " ymax: " << extent[3] << " zmin: " << extent[4] << " zmax: " << extent[5] << std::endl; for (int z = extent[4]; z < extent[5]; z++) { for (int y = extent[2]; y < extent[3]; y++) { for (int x = extent[0]; x < extent[1]; x++) { imageData->SetScalarComponentFromDouble(x,y,z,0,2.0); } } } // Retrieve the entries from the image data and print them to the screen for (int z = extent[4]; z < extent[5]; z++) { for (int y = extent[2]; y < extent[3]; y++) { for (int x = extent[0]; x < extent[1]; x++) { // Zero is the component, add another loop if you have more // than one component double v = imageData->GetScalarComponentAsDouble(x,y,z,0); // Eo something with v std::cout << v << " "; } std::cout << std::endl; } std::cout << std::endl; } return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(NegativeIndices) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(NegativeIndices MACOSX_BUNDLE NegativeIndices.cxx) target_link_libraries(NegativeIndices ${VTK_LIBRARIES})
Download and Build NegativeIndices¶
Danger
The generation of tar files has not been ported to the new VTKExamples. Some tarballs may be missing or out-of-date.
Click here to download NegativeIndices and its CMakeLists.txt file. Once the tarball NegativeIndices.tar has been downloaded and extracted,
cd NegativeIndices/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:
./NegativeIndices
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.