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96 lines
3.4 KiB
96 lines
3.4 KiB
/*=========================================================================
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Program: Visualization Toolkit
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Module: $RCSfile: vtkProgrammableFilter.h,v $
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Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
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All rights reserved.
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See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
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This software is distributed WITHOUT ANY WARRANTY; without even
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the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE. See the above copyright notice for more information.
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=========================================================================*/
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// .NAME vtkProgrammableFilter - a user-programmable filter
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// .SECTION Description
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// vtkProgrammableFilter is a filter that can be programmed by the user. To
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// use the filter you define a function that retrieves input of the correct
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// type, creates data, and then manipulates the output of the filter. Using
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// this filter avoids the need for subclassing - and the function can be
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// defined in an interpreter wrapper language such as Tcl or Java.
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//
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// The trickiest part of using this filter is that the input and output
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// methods are unusual and cannot be compile-time type checked. Instead, as a
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// user of this filter it is your responsibility to set and get the correct
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// input and output types.
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// .SECTION Caveats
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// The filter correctly manages modified time and network execution in most
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// cases. However, if you change the definition of the filter function,
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// you'll want to send a manual Modified() method to the filter to force it
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// to reexecute.
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// .SECTION See Also
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// vtkProgrammablePointDataFilter vtkProgrammableSource
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#ifndef __vtkProgrammableFilter_h
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#define __vtkProgrammableFilter_h
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#include "vtkDataSetAlgorithm.h"
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class VTK_GRAPHICS_EXPORT vtkProgrammableFilter : public vtkDataSetAlgorithm
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{
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public:
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static vtkProgrammableFilter *New();
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vtkTypeRevisionMacro(vtkProgrammableFilter,vtkDataSetAlgorithm);
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// Description:
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// Specify the function to use to operate on the point attribute data. Note
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// that the function takes a single (void *) argument.
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void SetExecuteMethod(void (*f)(void *), void *arg);
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// Description:
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// Set the arg delete method. This is used to free user memory.
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void SetExecuteMethodArgDelete(void (*f)(void *));
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// Description:
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// Get the input as a concrete type. This method is typically used by the
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// writer of the filter function to get the input as a particular type (i.e.,
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// it essentially does type casting). It is the users responsibility to know
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// the correct type of the input data.
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vtkPolyData *GetPolyDataInput();
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// Description:
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// Get the input as a concrete type.
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vtkStructuredPoints *GetStructuredPointsInput();
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// Description:
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// Get the input as a concrete type.
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vtkStructuredGrid *GetStructuredGridInput();
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// Description:
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// Get the input as a concrete type.
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vtkUnstructuredGrid *GetUnstructuredGridInput();
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// Description:
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// Get the input as a concrete type.
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vtkRectilinearGrid *GetRectilinearGridInput();
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protected:
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vtkProgrammableFilter();
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~vtkProgrammableFilter();
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int RequestData(vtkInformation *, vtkInformationVector **, vtkInformationVector *);
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void (*ExecuteMethod)(void *); //function to invoke
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void (*ExecuteMethodArgDelete)(void *);
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void *ExecuteMethodArg;
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private:
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vtkProgrammableFilter(const vtkProgrammableFilter&); // Not implemented.
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void operator=(const vtkProgrammableFilter&); // Not implemented.
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};
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#endif
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