UnknownLengthArray
VTKExamples/Cxx/Utilities/UnknownLengthArray
Description
The only difference between this example and the KnownLengthArray example is that SetNumberOfValues()
is not called, and SetValue()
is replaced by InsertNextValue()
.
Code
UnknownLengthArray.cxx
#include <vtkSmartPointer.h>
#include <vtkFloatArray.h>
int main(int, char *[])
{
vtkSmartPointer<vtkFloatArray> distances =
vtkSmartPointer<vtkFloatArray>::New();
distances->SetName("Distances");
distances->SetNumberOfComponents(1);
//set values
for(vtkIdType i = 0; i < 5; i++)
{
float f = (float)i + 0.1;
//this will allocate memory as necessary
distances->InsertNextValue(f);
}
//get values
for(vtkIdType i = 0; i < distances->GetNumberOfTuples(); i++)
{
float f = distances->GetValue(i);
std::cout << f << std::endl;
}
return EXIT_SUCCESS;
}
CMakeLists.txt
cmake_minimum_required(VERSION 2.8)
PROJECT(UnknownLengthArray)
find_package(VTK REQUIRED)
include(${VTK_USE_FILE})
add_executable(UnknownLengthArray MACOSX_BUNDLE UnknownLengthArray.cxx)
target_link_libraries(UnknownLengthArray ${VTK_LIBRARIES})
Download and Build UnknownLengthArray
Click here to download UnknownLengthArray and its CMakeLists.txt file. Once the tarball UnknownLengthArray.tar has been downloaded and extracted,
cd UnknownLengthArray/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:
./UnknownLengthArray
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.