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Program: Visualization Toolkit
Module: vtkTreeAlgorithm.h
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or for details.
This software is distributed WITHOUT ANY WARRANTY; without even
PURPOSE. See the above copyright notice for more information.
Copyright 2008 Sandia Corporation.
Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
the U.S. Government retains certain rights in this software.
// .NAME vtkTreeAlgorithm - Superclass for algorithms that produce only Tree as output
// .SECTION Description
// vtkTreeAlgorithm is a convenience class to make writing algorithms
// easier. It is also designed to help transition old algorithms to the new
// pipeline edgehitecture. 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 Tree. 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
// ExecuteData and ExecuteInformation. For new algorithms you should
// implement RequestData( request, inputVec, outputVec) but for older filters
// there is a default implementation that calls the old ExecuteData(output)
// signature. For even older filters that don't implement ExecuteData the
// default implementation calls the even older Execute() signature.
#ifndef __vtkTreeAlgorithm_h
#define __vtkTreeAlgorithm_h
#include "vtkAlgorithm.h"
#include "vtkTree.h" // makes things a bit easier
class vtkDataSet;
class VTK_FILTERING_EXPORT vtkTreeAlgorithm : public vtkAlgorithm
static vtkTreeAlgorithm *New();
void PrintSelf(ostream& os, vtkIndent indent);
// Description:
// see vtkAlgorithm for details
virtual int ProcessRequest(vtkInformation*,
// Description:
// Get the output data object for a port on this algorithm.
vtkTree* GetOutput() { return this->GetOutput(0); }
vtkTree* GetOutput(int index);
// Description:
// 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.
void SetInput(vtkDataObject * obj) { this->SetInput(0, obj); }
void SetInput(int index, vtkDataObject* obj);
// convenience method
virtual int RequestInformation(vtkInformation* request,
vtkInformationVector** inputVector,
vtkInformationVector* outputVector);
// Description:
// This is called by the superclass.
// This is the method you should override.
virtual int RequestData(vtkInformation* request,
vtkInformationVector** inputVector,
vtkInformationVector* outputVector);
// Description:
// This is called by the superclass.
// This is the method you should override.
virtual int RequestUpdateExtent(vtkInformation*,
// see algorithm for more info
virtual int FillOutputPortInformation(int port, vtkInformation* info);
virtual int FillInputPortInformation(int port, vtkInformation* info);
vtkTreeAlgorithm(const vtkTreeAlgorithm&); // Not implemented.
void operator=(const vtkTreeAlgorithm&); // Not implemented.