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#include "vtkThresholdGraph.h"
#include "vtkDoubleArray.h"
#include "vtkExtractSelectedGraph.h"
#include "vtkInformation.h"
#include "vtkInformationVector.h"
#include "vtkObjectFactory.h"
#include "vtkSelection.h"
#include "vtkSelectionNode.h"
#include "vtkSmartPointer.h"
vtkStandardNewMacro(vtkThresholdGraph);
//-----------------------------------------------------------------------------
vtkThresholdGraph::vtkThresholdGraph() : vtkGraphAlgorithm(),
LowerThreshold(0.0),
UpperThreshold(0.0)
{
}
//-----------------------------------------------------------------------------
vtkThresholdGraph::~vtkThresholdGraph()
{
// Do nothing.
}
//-----------------------------------------------------------------------------
void vtkThresholdGraph::PrintSelf(ostream &os, vtkIndent indent)
{
// Base class print.
vtkGraphAlgorithm::PrintSelf(os, indent);
os << indent << "LowerThreshold: " << this->LowerThreshold << endl;
os << indent << "UpperThreshold: " << this->UpperThreshold << endl;
}
//-----------------------------------------------------------------------------
int vtkThresholdGraph::RequestData(vtkInformation* vtkNotUsed(request),
vtkInformationVector** inputVector,
vtkInformationVector* outputVector)
{
if(!inputVector[0])
{
vtkErrorMacro("Error: NULL or invalid input vtkInformationVector.");
return 1;
}
vtkInformation* inInfo = inputVector[0]->GetInformationObject(0);
if(!inInfo)
{
vtkErrorMacro("Error: NULL or invalid input vtkInformation.");
return 1;
}
vtkDataObject* inDataObj = inInfo->Get(vtkDataObject::DATA_OBJECT());
if(!inDataObj)
{
vtkErrorMacro("Error: NULL or invalid input data object.");
return 1;
}
if(!outputVector)
{
vtkErrorMacro("Error: NULL or invalid output vtkInformationVector.");
return 1;
}
vtkInformation* outInfo = outputVector->GetInformationObject(0);
if(!outInfo)
{
vtkErrorMacro("Error: NULL of invalid output vtkInformation.")
}
vtkDataObject* outDataObj = outInfo->Get(vtkDataObject::DATA_OBJECT());
if(!outDataObj)
{
vtkErrorMacro("Error: NULL or invalid output data object.");
return 1;
}
vtkSmartPointer<vtkExtractSelectedGraph> extractThreshold (
vtkSmartPointer<vtkExtractSelectedGraph>::New());
vtkSmartPointer<vtkSelection> threshold (vtkSmartPointer<vtkSelection>::New());
vtkSmartPointer<vtkSelectionNode> thresholdNode (
vtkSmartPointer<vtkSelectionNode>::New());
vtkSmartPointer<vtkDoubleArray> thresholdArr (
vtkSmartPointer<vtkDoubleArray>::New());
vtkInformationVector* inArrayVec =
this->GetInformation()->Get(INPUT_ARRAYS_TO_PROCESS());
if (!inArrayVec)
{
vtkErrorMacro("Problem finding array to process");
return 1;
}
vtkInformation* inArrayInfo = inArrayVec->GetInformationObject(0);
if (!inArrayInfo)
{
vtkErrorMacro("Problem getting name of array to process.");
return 1;
}
if ( ! inArrayInfo->Has(vtkDataObject::FIELD_NAME()))
{
vtkErrorMacro("Missing field name.");
return 1;
}
const char* arrayNameToProcess =
inArrayInfo->Get(vtkDataObject::FIELD_NAME());
if(!arrayNameToProcess)
{
vtkErrorMacro("Unable to find valid array.");
return 1;
}
int fieldAssociation(-1);
if(!inArrayInfo->Has(vtkDataObject::FIELD_ASSOCIATION()))
{
vtkErrorMacro("Unable to query field association for the scalar.");
return 1;
}
fieldAssociation = inArrayInfo->Get(vtkDataObject::FIELD_ASSOCIATION());
thresholdArr->SetName(arrayNameToProcess);
thresholdArr->InsertNextValue(this->LowerThreshold);
thresholdArr->InsertNextValue(this->UpperThreshold);
thresholdNode->SetSelectionList(thresholdArr);
thresholdNode->SetContentType(vtkSelectionNode::THRESHOLDS);
if(fieldAssociation == vtkDataObject::FIELD_ASSOCIATION_EDGES)
{
thresholdNode->SetFieldType(vtkSelectionNode::EDGE);
}
else if(fieldAssociation == vtkDataObject::FIELD_ASSOCIATION_VERTICES)
{
thresholdNode->SetFieldType(vtkSelectionNode::VERTEX);
}
else
{
vtkErrorMacro("Array selected should be associated with vertex or " <<
"edge data.");
return 1;
}
threshold->AddNode(thresholdNode);
vtkSmartPointer<vtkDataObject> inputClone;
inputClone.TakeReference(inDataObj->NewInstance());
inputClone->ShallowCopy(inDataObj);
extractThreshold->SetInputData(0, inputClone);
extractThreshold->SetInputData(1, threshold);
extractThreshold->Update();
vtkDataObject* output = extractThreshold->GetOutputDataObject(0);
if(!output)
{
vtkErrorMacro("NULL or invalid output.");
return 1;
}
outDataObj->ShallowCopy(output);
return 1;
}
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