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/*=========================================================================
Program: Visualization Toolkit
Module: vtkExtractDataOverTime.cxx
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
#include "vtkExtractDataOverTime.h"
#include "vtkPointSet.h"
#include "vtkInformation.h"
#include "vtkInformationVector.h"
#include "vtkObjectFactory.h"
#include "vtkPointData.h"
#include "vtkDoubleArray.h"
#include "vtkStreamingDemandDrivenPipeline.h"
vtkStandardNewMacro(vtkExtractDataOverTime);
//----------------------------------------------------------------------------
vtkExtractDataOverTime::vtkExtractDataOverTime()
{
this->NumberOfTimeSteps = 0;
this->CurrentTimeIndex = 0;
this->PointIndex = 0;
}
//----------------------------------------------------------------------------
void vtkExtractDataOverTime::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os,indent);
os << indent << "Point Index: " << this->PointIndex << endl;
os << indent << "NumberOfTimeSteps: " << this->NumberOfTimeSteps << endl;
}
//----------------------------------------------------------------------------
int vtkExtractDataOverTime::RequestInformation(
vtkInformation* vtkNotUsed(request),
vtkInformationVector** inputVector,
vtkInformationVector* outputVector)
{
vtkInformation *inInfo = inputVector[0]->GetInformationObject(0);
if ( inInfo->Has(vtkStreamingDemandDrivenPipeline::TIME_STEPS()) )
{
this->NumberOfTimeSteps =
inInfo->Length( vtkStreamingDemandDrivenPipeline::TIME_STEPS() );
}
else
{
this->NumberOfTimeSteps = 0;
}
// The output of this filter does not contain a specific time, rather
// it contains a collection of time steps. Also, this filter does not
// respond to time requests. Therefore, we remove all time information
// from the output.
vtkInformation* outInfo = outputVector->GetInformationObject(0);
if (outInfo->Has(vtkStreamingDemandDrivenPipeline::TIME_STEPS()))
{
outInfo->Remove(vtkStreamingDemandDrivenPipeline::TIME_STEPS());
}
if (outInfo->Has(vtkStreamingDemandDrivenPipeline::TIME_RANGE()))
{
outInfo->Remove(vtkStreamingDemandDrivenPipeline::TIME_RANGE());
}
return 1;
}
//----------------------------------------------------------------------------
int vtkExtractDataOverTime::ProcessRequest(vtkInformation* request,
vtkInformationVector** inputVector,
vtkInformationVector* outputVector)
{
if(request->Has(vtkDemandDrivenPipeline::REQUEST_INFORMATION()))
{
return this->RequestInformation(request, inputVector, outputVector);
}
else if(request->Has(vtkStreamingDemandDrivenPipeline::REQUEST_UPDATE_EXTENT()))
{
// get the requested update extent
double *inTimes = inputVector[0]->GetInformationObject(0)
->Get(vtkStreamingDemandDrivenPipeline::TIME_STEPS());
if (inTimes)
{
double timeReq = inTimes[this->CurrentTimeIndex];
inputVector[0]->GetInformationObject(0)->Set
( vtkStreamingDemandDrivenPipeline::UPDATE_TIME_STEP(),
timeReq);
}
return 1;
}
// generate the data
else if(request->Has(vtkDemandDrivenPipeline::REQUEST_DATA()))
{
if (this->NumberOfTimeSteps == 0)
{
vtkErrorMacro("No Time steps in input time data!");
return 0;
}
// get the output data object
vtkInformation* outInfo = outputVector->GetInformationObject(0);
vtkPointSet *output =
vtkPointSet::SafeDownCast(outInfo->Get(vtkDataObject::DATA_OBJECT()));
// and input data object
vtkInformation* inInfo = inputVector[0]->GetInformationObject(0);
vtkPointSet *input =
vtkPointSet::SafeDownCast(inInfo->Get(vtkDataObject::DATA_OBJECT()));
// is this the first request
if (!this->CurrentTimeIndex)
{
// Tell the pipeline to start looping.
request->Set(vtkStreamingDemandDrivenPipeline::CONTINUE_EXECUTING(), 1);
this->AllocateOutputData(input, output);
}
// extract the actual data
output->GetPoints()->SetPoint( this->CurrentTimeIndex,
input->GetPoints()->GetPoint(this->PointIndex) );
output->GetPointData()->CopyData(input->GetPointData(), this->PointIndex,
this->CurrentTimeIndex);
if (input->GetPointData()->GetArray("Time"))
{
output->GetPointData()->GetArray("TimeData")->SetTuple1
(this->CurrentTimeIndex,
input->GetInformation()->Get(vtkDataObject::DATA_TIME_STEP()));
}
else
{
output->GetPointData()->GetArray("Time")->SetTuple1
(this->CurrentTimeIndex,
input->GetInformation()->Get(vtkDataObject::DATA_TIME_STEP()));
}
// increment the time index
this->CurrentTimeIndex++;
if (this->CurrentTimeIndex == this->NumberOfTimeSteps)
{
// Tell the pipeline to stop looping.
request->Remove(vtkStreamingDemandDrivenPipeline::CONTINUE_EXECUTING());
this->CurrentTimeIndex = 0;
}
return 1;
}
return this->Superclass::ProcessRequest(request, inputVector, outputVector);
}
//----------------------------------------------------------------------------
int vtkExtractDataOverTime::AllocateOutputData(vtkPointSet *input, vtkPointSet *output)
{
// by default vtkPointSetAlgorithm::RequestDataObject already
// created an output of the same type as the input
if (!output)
{
vtkErrorMacro("Output not created as expected!");
return 0;
}
// 1st the points
vtkPoints *points = output->GetPoints();
if (!points)
{
points = vtkPoints::New();
output->SetPoints( points );
points->Delete();
}
points->SetNumberOfPoints( this->NumberOfTimeSteps );
// now the point data
output->GetPointData()->CopyAllocate(input->GetPointData(), this->NumberOfTimeSteps);
// and finally add an array to hold the time at each step
vtkDoubleArray *timeArray = vtkDoubleArray::New();
timeArray->SetNumberOfComponents(1);
timeArray->SetNumberOfTuples(this->NumberOfTimeSteps);
if (input->GetPointData()->GetArray("Time"))
{
timeArray->SetName("TimeData");
}
else
{
timeArray->SetName("Time");
}
output->GetPointData()->AddArray(timeArray);
timeArray->Delete();
return 1;
}
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