VTK/Examples/Cxx/Utilities/UnknownLengthArrayOfVectors

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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().

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 2.6)
 
PROJECT(Array)
 
FIND_PACKAGE(VTK REQUIRED)
INCLUDE(${VTK_USE_FILE})
 
ADD_EXECUTABLE(VectorArrayUnknownLength VectorArrayUnknownLength.cxx)
TARGET_LINK_LIBRARIES(VectorArrayUnknownLength vtkHybrid)
Retrieved from "http://batchmake.org/Wiki/VTK/Examples/Cxx/Utilities/UnknownLengthArrayOfVectors"
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