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 KnownLengthArrayOfVectors 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
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.