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/*=========================================================================
Program: Visualization Toolkit
Module: vtkPiecewiseFunctionAlgorithm.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 "vtkPiecewiseFunctionAlgorithm.h"
#include "vtkCommand.h"
#include "vtkInformation.h"
#include "vtkInformationVector.h"
#include "vtkObjectFactory.h"
#include "vtkDataObject.h"
#include "vtkStreamingDemandDrivenPipeline.h"
#include "vtkTrivialProducer.h"
vtkStandardNewMacro(vtkPiecewiseFunctionAlgorithm);
//----------------------------------------------------------------------------
vtkPiecewiseFunctionAlgorithm::vtkPiecewiseFunctionAlgorithm()
{
// by default assume filters have one input and one output
// subclasses that deviate should modify this setting
this->SetNumberOfInputPorts(1);
this->SetNumberOfOutputPorts(1);
}
//----------------------------------------------------------------------------
vtkPiecewiseFunctionAlgorithm::~vtkPiecewiseFunctionAlgorithm()
{
}
//----------------------------------------------------------------------------
void vtkPiecewiseFunctionAlgorithm::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os, indent);
}
//----------------------------------------------------------------------------
vtkDataObject* vtkPiecewiseFunctionAlgorithm::GetOutput()
{
return this->GetOutput(0);
}
//----------------------------------------------------------------------------
vtkDataObject* vtkPiecewiseFunctionAlgorithm::GetOutput(int port)
{
return this->GetOutputDataObject(port);
}
//----------------------------------------------------------------------------
void vtkPiecewiseFunctionAlgorithm::SetOutput(vtkDataObject* d)
{
this->GetExecutive()->SetOutputData(0, d);
}
//----------------------------------------------------------------------------
vtkDataObject* vtkPiecewiseFunctionAlgorithm::GetInput()
{
return this->GetInput(0);
}
//----------------------------------------------------------------------------
vtkDataObject* vtkPiecewiseFunctionAlgorithm::GetInput(int port)
{
if (this->GetNumberOfInputConnections(port) < 1)
{
return 0;
}
return this->GetExecutive()->GetInputData(port, 0);
}
//----------------------------------------------------------------------------
int vtkPiecewiseFunctionAlgorithm::ProcessRequest(vtkInformation* request,
vtkInformationVector** inputVector,
vtkInformationVector* outputVector)
{
// generate the data
if(request->Has(vtkDemandDrivenPipeline::REQUEST_DATA()))
{
return this->RequestData(request, inputVector, outputVector);
}
return this->Superclass::ProcessRequest(request, inputVector, outputVector);
}
//----------------------------------------------------------------------------
int vtkPiecewiseFunctionAlgorithm::FillOutputPortInformation(
int vtkNotUsed(port), vtkInformation* info)
{
// now add our info
info->Set(vtkDataObject::DATA_TYPE_NAME(), "vtkPiecewiseFunction");
return 1;
}
//----------------------------------------------------------------------------
int vtkPiecewiseFunctionAlgorithm::FillInputPortInformation(
int vtkNotUsed(port), vtkInformation* info)
{
info->Set(vtkAlgorithm::INPUT_REQUIRED_DATA_TYPE(), "vtkPiecewiseFunction");
return 1;
}
//----------------------------------------------------------------------------
// This is the superclasses style of Execute method. Convert it into
// an imaging style Execute method.
int vtkPiecewiseFunctionAlgorithm::RequestData(
vtkInformation* request,
vtkInformationVector** vtkNotUsed( inputVector ),
vtkInformationVector* outputVector)
{
// the default implimentation is to do what the old pipeline did find what
// output is requesting the data, and pass that into ExecuteData
// which output port did the request come from
int outputPort =
request->Get(vtkDemandDrivenPipeline::FROM_OUTPUT_PORT());
// if output port is negative then that means this filter is calling the
// update directly, in that case just assume port 0
if (outputPort == -1)
{
outputPort = 0;
}
// get the data object
vtkInformation *outInfo =
outputVector->GetInformationObject(outputPort);
// call ExecuteData
this->ExecuteData( outInfo->Get(vtkDataObject::DATA_OBJECT()) );
return 1;
}
//----------------------------------------------------------------------------
// Assume that any source that implements ExecuteData
// can handle an empty extent.
void vtkPiecewiseFunctionAlgorithm::ExecuteData(vtkDataObject *output)
{
// I want to find out if the requested extent is empty.
if (output && this->UpdateExtentIsEmpty(output))
{
output->Initialize();
return;
}
this->Execute();
}
//----------------------------------------------------------------------------
void vtkPiecewiseFunctionAlgorithm::Execute()
{
vtkErrorMacro(<< "Definition of Execute() method should be in subclass and you should really use the ExecuteData(vtkInformation *request,...) signature instead");
}
//----------------------------------------------------------------------------
int vtkPiecewiseFunctionAlgorithm::UpdateExtentIsEmpty(vtkDataObject *output)
{
if (output == NULL)
{
return 1;
}
int *ext = output->GetUpdateExtent();
switch ( output->GetExtentType() )
{
case VTK_PIECES_EXTENT:
// Special way of asking for no input.
if ( output->GetUpdateNumberOfPieces() == 0 )
{
return 1;
}
break;
case VTK_3D_EXTENT:
// Special way of asking for no input. (zero volume)
if (ext[0] == (ext[1] + 1) ||
ext[2] == (ext[3] + 1) ||
ext[4] == (ext[5] + 1))
{
return 1;
}
break;
// We should never have this case occur
default:
vtkErrorMacro( << "Internal error - invalid extent type!" );
break;
}
return 0;
}
//----------------------------------------------------------------------------
void vtkPiecewiseFunctionAlgorithm::SetInput(vtkDataObject* input)
{
this->SetInput(0, input);
}
//----------------------------------------------------------------------------
void vtkPiecewiseFunctionAlgorithm::SetInput(int index, vtkDataObject* input)
{
if(input)
{
this->SetInputConnection(index, input->GetProducerPort());
}
else
{
// Setting a NULL input removes the connection.
this->SetInputConnection(index, 0);
}
}
//----------------------------------------------------------------------------
void vtkPiecewiseFunctionAlgorithm::AddInput(vtkDataObject* input)
{
this->AddInput(0, input);
}
//----------------------------------------------------------------------------
void vtkPiecewiseFunctionAlgorithm::AddInput(int index, vtkDataObject* input)
{
if(input)
{
this->AddInputConnection(index, input->GetProducerPort());
}
}
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