I’ve been using the following method to sort an array of values in the same order as my key array:
static void vtkSortDataArray::Sort(vtkAbstractArray* keys,vtkAbstractArray* values)
My “keys” array is not sorted and the values follow very well the keys values, which is why I find this method so powerful. What I noticed is, if I extract an array from my filter’s input and feed it as the “keys” array, that array also gets sorted and my input ends up being modified, which is not a good thing as of the pipeline paradigm. Here, I am forced to do a DeepCopy of my input array and apply vtkSortDataArray::Sort(…) onto that new array. Is this behaviour normal?