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| − | This example produces a vtkGraph as output.
| + | = '''See [https://lorensen.github.io/VTKExamples/site/Cxx/Developers/GraphAlgorithmSource GraphAlgorithmSource] on the new [https://lorensen.github.io/VTKExamples/site/ VTKExamples website].''' = |
| − | | |
| − | ==GraphAlgorithmSource.cxx==
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| − | <source lang="cpp">
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| − | #include <vtkSmartPointer.h>
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| − | #include <vtkGraph.h>
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| − | #include <vtkMutableUndirectedGraph.h>
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| − | | |
| − | #include "vtkTestGraphAlgorithmSource.h"
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| − | | |
| − | int main (int, char *[])
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| − | {
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| − | vtkSmartPointer<vtkTestGraphAlgorithmSource> source =
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| − | vtkSmartPointer<vtkTestGraphAlgorithmSource>::New();
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| − | source->Update();
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| − |
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| − | vtkGraph* outputGraph = source->GetOutput();
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| − |
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| − | std::cout << "Output number of vertices: "
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| − | << outputGraph->GetNumberOfVertices() << std::endl;
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| − | return EXIT_SUCCESS;
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| − | }
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| − | </source>
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| − | | |
| − | ==vtkTestGraphAlgorithmSource.h==
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| − | <source lang="cpp">
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| − | | |
| − | #ifndef __vtkTestGraphAlgorithmSource_h
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| − | #define __vtkTestGraphAlgorithmSource_h
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| − | | |
| − | #include "vtkGraphAlgorithm.h"
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| − | | |
| − | class vtkTestGraphAlgorithmSource : public vtkGraphAlgorithm
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| − | {
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| − | public:
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| − | vtkTypeRevisionMacro(vtkTestGraphAlgorithmSource,vtkGraphAlgorithm);
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| − | void PrintSelf(ostream& os, vtkIndent indent);
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| − | | |
| − | static vtkTestGraphAlgorithmSource *New();
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| − | protected:
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| − | vtkTestGraphAlgorithmSource();
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| − | ~vtkTestGraphAlgorithmSource();
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| − |
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| − | int RequestData(vtkInformation *, vtkInformationVector **, vtkInformationVector *);
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| − |
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| − | int RequestDataObject(vtkInformation *, vtkInformationVector **, vtkInformationVector *);
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| − | | |
| − | private:
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| − | vtkTestGraphAlgorithmSource(const vtkTestGraphAlgorithmSource&); // Not implemented.
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| − | void operator=(const vtkTestGraphAlgorithmSource&); // Not implemented.
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| − | | |
| − | };
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| − | | |
| − | #endif
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| − | | |
| − | </source>
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| − | | |
| − | ==vtkTestGraphAlgorithmSource.cxx==
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| − | <source lang="cpp">
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| − | #include "vtkTestGraphAlgorithmSource.h"
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| − | | |
| − | #include "vtkObjectFactory.h"
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| − | #include "vtkStreamingDemandDrivenPipeline.h"
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| − | #include "vtkInformationVector.h"
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| − | #include "vtkInformation.h"
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| − | #include "vtkDataObject.h"
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| − | #include "vtkSmartPointer.h"
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| − | #include "vtkMutableUndirectedGraph.h"
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| − | #include "vtkUndirectedGraph.h"
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| − | #include "vtkGraph.h"
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| − | | |
| − | vtkCxxRevisionMacro(vtkTestGraphAlgorithmSource, "$Revision: 1.70 $");
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| − | vtkStandardNewMacro(vtkTestGraphAlgorithmSource);
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| − | | |
| − | vtkTestGraphAlgorithmSource::vtkTestGraphAlgorithmSource()
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| − | {
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| − | this->SetNumberOfInputPorts(0);
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| − | this->SetNumberOfOutputPorts(1);
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| − | }
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| − | | |
| − | vtkTestGraphAlgorithmSource::~vtkTestGraphAlgorithmSource()
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| − | {
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| − | | |
| − | }
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| − | | |
| − | int vtkTestGraphAlgorithmSource::RequestData(
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| − | vtkInformation *vtkNotUsed(request),
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| − | vtkInformationVector **vtkNotUsed(inputVector),
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| − | vtkInformationVector *outputVector)
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| − | {
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| − |
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| − | vtkInformation *outInfo = outputVector->GetInformationObject(0);
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| − |
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| − | vtkGraph *output = vtkGraph::SafeDownCast(
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| − | outInfo->Get(vtkDataObject::DATA_OBJECT()));
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| − |
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| − | vtkSmartPointer<vtkMutableUndirectedGraph> NewGraph =
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| − | vtkSmartPointer<vtkMutableUndirectedGraph>::New();
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| − |
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| − | //add 3 vertices
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| − | NewGraph->AddVertex();
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| − | NewGraph->AddVertex();
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| − | NewGraph->AddVertex();
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| − |
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| − | output->ShallowCopy(NewGraph);
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| − |
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| − | return 1;
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| − | }
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| − | | |
| − | int vtkTestGraphAlgorithmSource::RequestDataObject(
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| − | vtkInformation*,
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| − | vtkInformationVector**,
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| − | vtkInformationVector* )
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| − | {
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| − | | |
| − | vtkUndirectedGraph *output = 0;
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| − | output = vtkUndirectedGraph::New();
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| − |
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| − |
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| − | this->GetExecutive()->SetOutputData(0, output);
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| − | output->Delete();
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| − | | |
| − | return 1;
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| − | }
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| − | | |
| − | //---------------------------------------------------------------------------- | |
| − | void vtkTestGraphAlgorithmSource::PrintSelf(ostream& os, vtkIndent indent)
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| − | {
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| − | this->Superclass::PrintSelf(os,indent);
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| − | }
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| − | </source>
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| − | | |
| − | {{VTKCMakeListsMultiple|{{SUBPAGENAME}}|vtkTestGraphAlgorithmSource}}
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