Function vtkDataSetAttributesCopyValues

Common/DataModel/vtkDataSetAttributes.cxx:499–533

// Handle vtkAbstractArrays that aren't vtkDataArrays.
template <class iterT>
void vtkDataSetAttributesCopyValues(iterT* destIter, const int* outExt, vtkIdType outIncs[3],
  iterT* srcIter, const int* inExt, vtkIdType inIncs[3])
{
  int data_type_size = srcIter->GetArray()->GetDataTypeSize();
  vtkIdType rowLength = outIncs[1];
  unsigned char* inPtr;
  unsigned char* outPtr;
  unsigned char* inZPtr;
  unsigned char* outZPtr;

  // Get the starting input pointer.
  inZPtr = static_cast<unsigned char*>(srcIter->GetArray()->GetVoidPointer(0));
  // Shift to the start of the subextent.
  inZPtr += (outExt[0] - inExt[0]) * inIncs[0] * data_type_size +
    (outExt[2] - inExt[2]) * inIncs[1] * data_type_size +
    (outExt[4] - inExt[4]) * inIncs[2] * data_type_size;

  // Get output pointer.
  outZPtr = static_cast<unsigned char*>(destIter->GetArray()->GetVoidPointer(0));

  // Loop over z axis.
  for (int zIdx = outExt[4]; zIdx <= outExt[5]; ++zIdx)
  {
    inPtr = inZPtr;
    outPtr = outZPtr;
    for (int yIdx = outExt[2]; yIdx <= outExt[3]; ++yIdx)
    {
      memcpy(outPtr, inPtr, rowLength * data_type_size);
      inPtr += inIncs[1] * data_type_size;
      outPtr += outIncs[1] * data_type_size;
    }
    inZPtr += inIncs[2] * data_type_size;
    outZPtr += outIncs[2] * data_type_size;
  }
}

//------------------------------------------------------------------------------
// Specialize for vtkStringArray.