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| − | This example produces a vtkGraph as output. Current it does not work - producing errors such as
| + | = '''See [https://lorensen.github.io/VTKExamples/site/Cxx/Developers/GraphAlgorithmSource GraphAlgorithmSource] on the new [https://lorensen.github.io/VTKExamples/site/ VTKExamples website].''' = |
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| − | You are trying to instantiate DataObjectType "vtkGraph" which does not exist.
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| − | and
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| − | Algorithm vtkTestSource(0x9fee918) did not create output for port 0 when asked by REQUEST_DATA_OBJECT and does not specify a concrete DATA_TYPE_NAME.
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| − | ==SourceExample.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 "vtkTestSource.h"
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| − | int main (int argc, char *argv[])
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| − | {
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| − | vtkSmartPointer<vtkTestSource> source = vtkSmartPointer<vtkTestSource>::New();
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| − | source->Update();
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| − | vtkGraph* outputGraph = source->GetOutput();
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| − | vtkstd::cout << "Output number of vertices: " << outputGraph->GetNumberOfVertices() << vtkstd::endl;
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| − | return 0;
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| − | }
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| − | </source>
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| − | ==vtkTestSource.h==
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| − | <source lang="cpp">
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| − | #ifndef __vtkTestSource_h
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| − | #define __vtkTestSource_h
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| − | #include "vtkGraphAlgorithm.h"
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| − | class vtkTestSource : public vtkGraphAlgorithm
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| − | {
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| − | public:
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| − | vtkTypeRevisionMacro(vtkTestSource,vtkGraphAlgorithm);
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| − | void PrintSelf(ostream& os, vtkIndent indent);
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| − | static vtkTestSource *New();
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| − | protected:
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| − | vtkTestSource();
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| − | ~vtkTestSource();
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| − | //int RequestData(vtkInformation *, vtkInformationVector **, vtkInformationVector *);
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| − | int RequestDataObject(vtkInformation *, vtkInformationVector **, vtkInformationVector *);
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| − | private:
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| − | vtkTestSource(const vtkTestSource&); // Not implemented.
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| − | void operator=(const vtkTestSource&); // Not implemented.
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| − | };
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| − | #endif
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| − | </source>
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| − | | |
| − | ==vtkTestSource.cxx==
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| − | <source lang="cpp">
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| − | #include "vtkTestSource.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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| − | vtkCxxRevisionMacro(vtkTestSource, "$Revision: 1.70 $");
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| − | vtkStandardNewMacro(vtkTestSource);
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| − | vtkTestSource::vtkTestSource()
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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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| − | vtkTestSource::~vtkTestSource()
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| − | {
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| − | }
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| − | //int vtkTestSource::RequestData(vtkInformation *vtkNotUsed(request),
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| − | int vtkTestSource::RequestDataObject(vtkInformation *vtkNotUsed(request),
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| − | vtkInformationVector **inputVector,
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| − | vtkInformationVector *outputVector)
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| − | {
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| − | vtkInformation *outInfo = outputVector->GetInformationObject(0);
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| − |
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| − | vtkMutableUndirectedGraph *output = vtkMutableUndirectedGraph::SafeDownCast(
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| − | outInfo->Get(vtkDataObject::DATA_OBJECT()));
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| − |
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| − | output = vtkMutableUndirectedGraph::New();
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| − | //add 3 vertices
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| − | output->AddVertex();
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| − | output->AddVertex();
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| − | output->AddVertex();
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| − | return 1;
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| − | }
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| − | //---------------------------------------------------------------------------- | |
| − | void vtkTestSource::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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| − | | |
| − | ==CMakeLists.txt==
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| − | <source lang="text">
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| − | cmake_minimum_required(VERSION 2.6)
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| − | PROJECT(vtkGraphAlgorithmSource)
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| − | FIND_PACKAGE(VTK REQUIRED)
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| − | INCLUDE(${VTK_USE_FILE})
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| − | ADD_EXECUTABLE(SourceExample SourceExample.cxx vtkTestSource.cxx)
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| − | TARGET_LINK_LIBRARIES(SourceExample vtkHybrid)
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| − | </source>
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