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<p>Hi vtk-fans </p>
<p></p>
<p>How can I get the input and output vtkAlgorithm-objects of a vtkAlgorithm-object ?</p>
<p>I try to write an easy function for removing vtkAlgorithm-objects from a visualisation-pipeline like the following. But inputObj and outputObj is always null. </p>
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<p> Greetings</p>
<p> Jens</p>
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<p>////////////////////////////////////////////////////////////////</p>
<p>//// removing a vtkAlgorithm-obj form its</p>
<p>//// visualisation pipeline.</p>
<p>////////////////////////////////////////////////////////////////</p>
<p>bool removeAlgorithm( vtkAlgorithm* algo )</p>
<p>{</p>
<p> vtkInformation* inputInfo = algo->GetInputPortInformation(0);</p>
<p> vtkInformation* outputInfo = algo->GetOutputPortInformation(0);</p>
<p></p>
<p> // get the input- and output-vtkAlgorithm of algo </p>
<p> vtkAlgorithm inputObj = vtkAlgorithm::SafeDownCast( </p>
<p> outputInfo->Get(</p>
<p> vtkDataObject::DATA_OBJECT()));</p>
<p> vtkAlgorithm outputObj = vtkAlgorithm::SafeDownCast( </p>
<p> inputInfo->Get(</p>
<p> vtkDataObject::DATA_OBJECT()));</p>
<p></p>
<p> // rechain the algorithms</p>
<p> if(inputObj && outputObj) {</p>
<p> inputObj->RemoveAllInputs();</p>
<p> inputObj->SetInputConnection( outputObj->GetOutputPort() );</p>
<p> alog->Delete();</p>
<p> return true;</p>
<p> }</p>
<p> return false;</p>
<p>}</p>
<p></p>
<p></p>
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