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87 lines
3.3 KiB
C
87 lines
3.3 KiB
C
3 weeks ago
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/*=========================================================================
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Program: Visualization Toolkit
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Module: vtkProgrammableDataObjectSource.h
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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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/**
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* @class vtkProgrammableDataObjectSource
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* @brief generate source data object via a user-specified function
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*
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* vtkProgrammableDataObjectSource is a source object that is programmable by
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* the user. The output of the filter is a data object (vtkDataObject) which
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* represents data via an instance of field data. To use this object, you
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* must specify a function that creates the output.
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*
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* Example use of this filter includes reading tabular data and encoding it
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* as vtkFieldData. You can then use filters like vtkDataObjectToDataSetFilter
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* to convert the data object to a dataset and then visualize it. Another
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* important use of this class is that it allows users of interpreters (e.g.,
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* Java) the ability to write source objects without having to
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* recompile C++ code or generate new libraries.
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*
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* @sa
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* vtkProgrammableFilter vtkProgrammableAttributeDataFilter
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* vtkProgrammableSource vtkDataObjectToDataSetFilter
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*/
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#ifndef vtkProgrammableDataObjectSource_h
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#define vtkProgrammableDataObjectSource_h
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#include "vtkDataObjectAlgorithm.h"
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#include "vtkFiltersSourcesModule.h" // For export macro
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class VTKFILTERSSOURCES_EXPORT vtkProgrammableDataObjectSource : public vtkDataObjectAlgorithm
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{
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public:
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static vtkProgrammableDataObjectSource* New();
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vtkTypeMacro(vtkProgrammableDataObjectSource, vtkDataObjectAlgorithm);
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void PrintSelf(ostream& os, vtkIndent indent) override;
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/**
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* Signature definition for programmable method callbacks. Methods passed to
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* SetExecuteMethod or SetExecuteMethodArgDelete must conform to this
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* signature.
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* The presence of this typedef is useful for reference and for external
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* analysis tools, but it cannot be used in the method signatures in these
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* header files themselves because it prevents the internal VTK wrapper
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* generators from wrapping these methods.
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*/
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typedef void (*ProgrammableMethodCallbackType)(void* arg);
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/**
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* Specify the function to use to generate the output data object. Note
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* that the function takes a single (void *) argument.
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*/
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void SetExecuteMethod(void (*f)(void*), void* arg);
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/**
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* Set the arg delete method. This is used to free user memory.
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*/
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void SetExecuteMethodArgDelete(void (*f)(void*));
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protected:
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vtkProgrammableDataObjectSource();
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~vtkProgrammableDataObjectSource() override;
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int RequestData(vtkInformation*, vtkInformationVector**, vtkInformationVector*) override;
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ProgrammableMethodCallbackType ExecuteMethod; // function to invoke
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ProgrammableMethodCallbackType ExecuteMethodArgDelete;
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void* ExecuteMethodArg;
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private:
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vtkProgrammableDataObjectSource(const vtkProgrammableDataObjectSource&) = delete;
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void operator=(const vtkProgrammableDataObjectSource&) = delete;
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};
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#endif
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