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<div class="title">vtkLabelHierarchyAlgorithm </div> </div>
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<div class="textblock"><p>Section: <a class="el" href="sec_vtkrendering.html">Visualization Toolkit Rendering Classes</a> </p>
<h1><a class="anchor" id="Usage"></a>
Usage</h1>
<p>vtkLabelHierarchyAlgorithm is a convenience class to make writing algorithms easier. It is also designed to help transition old algorithms to the new pipeline architecture. There are some assumptions and defaults made by this class you should be aware of. This class defaults such that your filter will have one input port and one output port. If that is not the case simply change it with SetNumberOfInputPorts etc. See this class constructor for the default. This class also provides a FillInputPortInfo method that by default says that all inputs will be DataObjects. If that isn't the case then please override this method in your subclass. This class breaks out the downstream requests into separate functions such as RequestData and RequestInformation. You should implement RequestData( request, inputVec, outputVec) in subclasses.</p>
<p>To create an instance of class vtkLabelHierarchyAlgorithm, simply invoke its constructor as follows </p>
<pre class="fragment"> obj = vtkLabelHierarchyAlgorithm
</pre> <h1><a class="anchor" id="Methods"></a>
Methods</h1>
<p>The class vtkLabelHierarchyAlgorithm 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, <code>obj</code> is an instance of the vtkLabelHierarchyAlgorithm class. </p>
<ul>
<li>
<code>string = obj.GetClassName ()</code> </li>
<li>
<code>int = obj.IsA (string name)</code> </li>
<li>
<code>vtkLabelHierarchyAlgorithm = obj.NewInstance ()</code> </li>
<li>
<code>vtkLabelHierarchyAlgorithm = obj.SafeDownCast (vtkObject o)</code> </li>
<li>
<code>vtkLabelHierarchy = obj.GetOutput ()</code> - Get the output data object for a port on this algorithm. </li>
<li>
<code>vtkLabelHierarchy = obj.GetOutput (int )</code> - Get the output data object for a port on this algorithm. </li>
<li>
<code>obj.SetOutput (vtkDataObject d)</code> - Get the output data object for a port on this algorithm. </li>
<li>
<code>vtkDataObject = obj.GetInput ()</code> </li>
<li>
<code>vtkDataObject = obj.GetInput (int port)</code> </li>
<li>
<code>vtkLabelHierarchy = obj.GetLabelHierarchyInput (int port)</code> </li>
<li>
<code>obj.SetInput (vtkDataObject )</code> - Set an input of this algorithm. You should not override these methods because they are not the only way to connect a pipeline. Note that these methods support old-style pipeline connections. When writing new code you should use the more general vtkAlgorithm::SetInputConnection(). These methods transform the input index to the input port index, not an index of a connection within a single port. </li>
<li>
<code>obj.SetInput (int , vtkDataObject )</code> - Set an input of this algorithm. You should not override these methods because they are not the only way to connect a pipeline. Note that these methods support old-style pipeline connections. When writing new code you should use the more general vtkAlgorithm::SetInputConnection(). These methods transform the input index to the input port index, not an index of a connection within a single port. </li>
<li>
<code>obj.AddInput (vtkDataObject )</code> - Add an input of this algorithm. Note that these methods support old-style pipeline connections. When writing new code you should use the more general vtkAlgorithm::AddInputConnection(). See SetInput() for details. </li>
<li>
<code>obj.AddInput (int , vtkDataObject )</code> - Add an input of this algorithm. Note that these methods support old-style pipeline connections. When writing new code you should use the more general vtkAlgorithm::AddInputConnection(). See SetInput() for details. </li>
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