Array Refactoring: Difference between revisions

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== Overview ==
Moved to http://www.vtk.org/Wiki/VTK/Array_Refactoring
 
Now that we have [http://kitware.com/InfovisWiki/index.php/N-Way_Array_Data_Structures N-Way Array Data Structures], it would be ideal if we could use them as attributes in data objects.  This will likely involve some tricky work to somehow merge the vtkAbstractArray- and vtkArray- hierarchies.
 
== Recent Work ==
 
* Merged vtkFactoredArrayData / vtkFactoredArrayDataAlgorithm into vtkArrayData / vtkArrayDataAlgorithm.
 
* Added vtkArray::GetName() and vtkArray::SetName().
 
* vtkDenseArray memory management.
** vtkDenseArray::MemoryBlock.
** vtkDenseArray::StaticMemoryBlock.
** vtkDenseArray::HeapMemoryBlock.
 
* vtkSparseICSArray.
** Changes the way coordinates are stored, one contiguous array of coordinates per dimension, instead of a single contiguous array for all dimensions.
** Implements value sorting.
** Could probably replace the current vtkSparseArray implementation.
 
== Proposed Work ==
 
* Provide iterators, memory layout functionality in vtkDenseArray to support in-situ work.
* Support vtkArray as attributes.  Some different approaches:
*# vtkArray derives from vtkAbstractArray.
*#* Worst possible approach, there are methods in vtkAbstractArray (GetVoidPointer()) that are totally incompatible with sparse arrays.
*# vtkArray and vtkAbstractArray remain apart.
*#* vtkFieldData would store vtkArray as a distinct type.  Unfortunately, this GetArray() is already taken by vtkDataArray.
*#* Wouldn't work with Get/SetInputArrayToProcess().
*# vtkAbstractArray derives from vtkArray.
*#* Implementing vtkArray in current vtkAbstractArray implementations should be straightforward.
*#* vtkFieldData would have to provide methods that return vtkArray.  Same problems with GetArray().
*#* Implies changes to Get/SetInputArrayToProcess().

Latest revision as of 10:43, 10 April 2009