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/*=========================================================================
Program: Visualization Toolkit
Module: vtkPistonAlgorithm.h
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
// .NAME vtkPistonAlgorithm - Superclass for algorithms that produce only
// PistonDataObjects
// .SECTION Description
// vtkPistonAlgorithm is a convenience class to make writing algorithms
// that operate in piston space easer. Basically one does that by subclassing
// this class and overriding Execute() to call into a method that calls into
// an external function compiled with the cuda compiler.
//
// 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 PistonDataObject. 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.
#ifndef vtkPistonAlgorithm_h
#define vtkPistonAlgorithm_h
#include "vtkAcceleratorsPistonModule.h" // For export macro
#include "vtkAlgorithm.h"
class vtkPistonDataObject;
class VTKACCELERATORSPISTON_EXPORT vtkPistonAlgorithm : public vtkAlgorithm
{
public:
static vtkPistonAlgorithm *New();
vtkTypeMacro(vtkPistonAlgorithm,vtkAlgorithm);
void PrintSelf(ostream& os, vtkIndent indent);
// Description:
// Interface the algorithm to the Pipeline's passes.
virtual int ProcessRequest(vtkInformation*,
vtkInformationVector**,
vtkInformationVector*);
// Description:
// A convenience method to reduce code duplication that gets
// the output as the expected type or NULL.
vtkPistonDataObject *GetPistonDataObjectOutput(int port);
// Description:
// Assign a data object as input. Note that this method does not
// establish a pipeline connection. Use SetInputConnection() to
// setup a pipeline connection.
void SetInputData(int num, vtkDataObject *input);
void SetInputData(vtkDataObject *input) { this->SetInputData(0, input); };
protected:
vtkPistonAlgorithm();
~vtkPistonAlgorithm();
// Description:
// Overridden to say that we take in and produce vtkPistonDataObjects
virtual int FillInputPortInformation(int port, vtkInformation* info);
virtual int FillOutputPortInformation(int port, vtkInformation* info);
// Description:
// Produce empty output of the proper type for RequestData to fill in.
virtual int RequestDataObject(vtkInformation* request,
vtkInformationVector** inputVector,
vtkInformationVector* outputVector);
// Description:
// Produce meta-data about what RequestData will produce.
virtual int RequestInformation(vtkInformation* request,
vtkInformationVector** inputVector,
vtkInformationVector* outputVector);
// Description:
// Participate in pipeline's sub extent determination.
virtual int RequestUpdateExtent(vtkInformation*,
vtkInformationVector**,
vtkInformationVector*);
// Description:
// Method that does the actual calculation.
virtual int RequestData(vtkInformation* request,
vtkInformationVector** inputVector,
vtkInformationVector* outputVector);
// Description:
// Typically Execute uses this to copy input bounds to output.
// Algorithms for which this heuristic is poor, should override and
// do it exactly, perhaps by asking the GPU to calculate it,
virtual void PassBoundsForward(vtkPistonDataObject *id,
vtkPistonDataObject *od);
private:
vtkPistonAlgorithm(const vtkPistonAlgorithm&); // Not implemented.
void operator=(const vtkPistonAlgorithm&); // Not implemented.
};
#endif
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