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How to get VTK's tuple size from vtkDataArray

I'm trying to read all the data from all the tuples from a vtkDataArray class. However vtkDataArray::GetTuple as can be seen here returns a pointer to a double array. I'm wondering how can I get the size of that array. Seems like I'm missing an obvious solution.

Code snipet:

void doSomething(vtkSmartPointer<vtkDataArray> dataArray)
{
vtkIdType numTuples = dataArray->GetNumberOfTuples();
for (vtkIdType tupleIdx = 0; tupleIdx < numTuples; ++tupleIdx)
{
double* tuple = dataArray->GetTuple(tupleIdx);
for (int j = 0; j < ¿¿¿???; ++j}
double var = tuple[j];
//Do something with var
//Carefull don't go out of bounds
}
}


1 Answer
1

You need dataArray->GetNumberOfComponents(). If you know the number of components then it may be easier to use other functions, for example, for 3 components you can use dataArray->GetTuple3(). VTK provides functions GetTuple1(), GetTuple2(), ... ,GetTuple9().

dataArray->GetNumberOfComponents()

dataArray->GetTuple3()

GetTuple1()

GetTuple2()

GetTuple9()

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