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vtkMergeDataObjectFilter

Section: Visualization Toolkit Graphics Classes

# Usage

vtkMergeDataObjectFilter is a filter that merges the field from a vtkDataObject with a vtkDataSet. The resulting combined dataset can then be processed by other filters (e.g., vtkFieldDataToAttributeDataFilter) to create attribute data like scalars, vectors, etc.

The filter operates as follows. The field data from the vtkDataObject is merged with the input's vtkDataSet and then placed in the output. You can choose to place the field data into the cell data field, the point data field, or the datasets field (i.e., the one inherited from vtkDataSet's superclass vtkDataObject). All this data shuffling occurs via reference counting, therefore memory is not copied.

One of the uses of this filter is to allow you to read/generate the structure of a dataset independent of the attributes. So, for example, you could store the dataset geometry/topology in one file, and field data in another. Then use this filter in combination with vtkFieldDataToAttributeData to create a dataset ready for processing in the visualization pipeline.

To create an instance of class vtkMergeDataObjectFilter, simply invoke its constructor as follows

      obj = vtkMergeDataObjectFilter

# Methods

The class vtkMergeDataObjectFilter has several methods that can be used. They are listed below. Note that the documentation is translated automatically from the VTK sources, and may not be completely intelligible. When in doubt, consult the VTK website. In the methods listed below, `obj` is an instance of the vtkMergeDataObjectFilter class.

- `string = obj.GetClassName ()`
- `int = obj.IsA (string name)`
- `vtkMergeDataObjectFilter = obj.NewInstance ()`
- `vtkMergeDataObjectFilter = obj.SafeDownCast (vtkObject o)`
- `obj.SetDataObject (vtkDataObject object)` - Specify the data object to merge with the input dataset.
- `vtkDataObject = obj.GetDataObject ()` - Specify the data object to merge with the input dataset.
- `obj.SetOutputField (int )` - Specify where to place the field data during the merge process. There are three choices: the field data associated with the vtkDataObject superclass; the point field attribute data; and the cell field attribute data.
- `int = obj.GetOutputField ()` - Specify where to place the field data during the merge process. There are three choices: the field data associated with the vtkDataObject superclass; the point field attribute data; and the cell field attribute data.
- `obj.SetOutputFieldToDataObjectField ()` - Specify where to place the field data during the merge process. There are three choices: the field data associated with the vtkDataObject superclass; the point field attribute data; and the cell field attribute data.
- `obj.SetOutputFieldToPointDataField ()` - Specify where to place the field data during the merge process. There are three choices: the field data associated with the vtkDataObject superclass; the point field attribute data; and the cell field attribute data.
- `obj.SetOutputFieldToCellDataField ()` - Specify where to place the field data during the merge process. There are three choices: the field data associated with the vtkDataObject superclass; the point field attribute data; and the cell field attribute data.