VectorArrayUnknownLength
VTKExamples/Cxx/Utilities/VectorArrayUnknownLength
Description¶
This example creates a VTK style float array of vectors. This can be easily interchanged with vtkIntArray, vtkDoubleArray, etc.
The only difference between this example and the VectorArrayKnownLength example is that SetNumberOfValues()
is not called, and SetTuple()
is replaced by InsertNextTuple()
.
Code¶
VectorArrayUnknownLength.cxx
#include <vtkSmartPointer.h> #include <vtkFloatArray.h> int main(int, char *[]) { vtkSmartPointer<vtkFloatArray> distances = vtkSmartPointer<vtkFloatArray>::New(); distances->SetName("Distances"); distances->SetNumberOfComponents(3); //set values for(vtkIdType i = 0; i < 5; i++) { float tuple[3]; tuple[0] = (float)i + 0.1; tuple[1] = (float)i + 0.2; tuple[2] = (float)i + 0.3; //this will allocate memory as necessary distances->InsertNextTuple(tuple); } //get values for(vtkIdType i = 0; i < distances->GetNumberOfTuples(); i++) { double d[3]; distances->GetTuple(i, d); std::cout << d[0] << " " << d[1] << " " << d[2] << std::endl; } return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(VectorArrayUnknownLength) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(VectorArrayUnknownLength MACOSX_BUNDLE VectorArrayUnknownLength.cxx) target_link_libraries(VectorArrayUnknownLength ${VTK_LIBRARIES})
Download and Build VectorArrayUnknownLength¶
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 Some tarballs may be missing or out-of-date.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 VectorArrayUnknownLength and its CMakeLists.txt file. Once the tarball VectorArrayUnknownLength.tar has been downloaded and extracted,
cd VectorArrayUnknownLength/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:
./VectorArrayUnknownLength
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.