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/*=========================================================================
Program: Visualization Toolkit
Module: vtkExtractGrid.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 "vtkExtractGrid.h"
#include "vtkBoundingBox.h"
#include "vtkCellData.h"
#include "vtkExtractStructuredGridHelper.h"
#include "vtkInformation.h"
#include "vtkInformationVector.h"
#include "vtkObjectFactory.h"
#include "vtkPointData.h"
#include "vtkStreamingDemandDrivenPipeline.h"
#include "vtkStructuredGrid.h"
vtkStandardNewMacro(vtkExtractGrid);
// Construct object to extract all of the input data.
vtkExtractGrid::vtkExtractGrid()
{
this->VOI[0] = this->VOI[2] = this->VOI[4] = 0;
this->VOI[1] = this->VOI[3] = this->VOI[5] = VTK_INT_MAX;
this->SampleRate[0] = this->SampleRate[1] = this->SampleRate[2] = 1;
this->IncludeBoundary = 0;
this->Internal = vtkExtractStructuredGridHelper::New();
}
vtkExtractGrid::~vtkExtractGrid()
{
if( this->Internal != NULL )
{
this->Internal->Delete();
}
}
//------------------------------------------------------------------------------
int vtkExtractGrid::RequestInformation(
vtkInformation *vtkNotUsed(request),
vtkInformationVector **inputVector,
vtkInformationVector *outputVector)
{
// get the info objects
vtkInformation *inInfo = inputVector[0]->GetInformationObject(0);
vtkInformation *outInfo = outputVector->GetInformationObject(0);
int wholeExtent[6], outWholeExt[6];
inInfo->Get(vtkStreamingDemandDrivenPipeline::WHOLE_EXTENT(), wholeExtent);
this->Internal->Initialize(
this->VOI,wholeExtent,this->SampleRate,(this->IncludeBoundary==1));
if (!this->Internal->IsValid())
{
vtkDebugMacro("Error while initializing filter.");
return 0;
}
this->Internal->GetOutputWholeExtent(outWholeExt);
outInfo->Set(vtkStreamingDemandDrivenPipeline::WHOLE_EXTENT(),
outWholeExt, 6);
return 1;
}
int vtkExtractGrid::RequestUpdateExtent(
vtkInformation *vtkNotUsed(request),
vtkInformationVector **inputVector,
vtkInformationVector *outputVector)
{
if (!this->Internal->IsValid())
{
return 0;
}
int i;
// get the info objects
vtkInformation *inInfo = inputVector[0]->GetInformationObject(0);
bool emptyExtent = false;
int uExt[6];
for (i=0; i<3; i++)
{
if (this->Internal->GetSize(i) < 1)
{
uExt[0] = uExt[2] = uExt[4] = 0;
uExt[1] = uExt[3] = uExt[5] = -1;
emptyExtent = true;
break;
}
}
if (!emptyExtent)
{
// Find input update extent based on requested output
// extent
int oUExt[6];
outputVector->GetInformationObject(0)->Get(
vtkStreamingDemandDrivenPipeline::UPDATE_EXTENT(), oUExt);
int oWExt[6]; // For parallel parititon this will be different.
this->Internal->GetOutputWholeExtent(oWExt);
for (i=0; i<3; i++)
{
int idx = oUExt[2*i] - oWExt[2*i]; // Extent value to index
if (idx < 0 || idx >= (int)this->Internal->GetSize(i))
{
vtkWarningMacro("Requested extent outside whole extent.")
idx = 0;
}
uExt[2*i] = this->Internal->GetMappedExtentValueFromIndex(i, idx);
int jdx = oUExt[2*i+1] - oWExt[2*i]; // Extent value to index
if (jdx < idx || jdx >= (int)this->Internal->GetSize(i))
{
vtkWarningMacro("Requested extent outside whole extent.")
jdx = 0;
}
uExt[2*i + 1] = this->Internal->GetMappedExtentValueFromIndex(i, jdx);
}
}
inInfo->Set(vtkStreamingDemandDrivenPipeline::UPDATE_EXTENT(), uExt, 6);
// We can handle anything.
inInfo->Set(vtkStreamingDemandDrivenPipeline::EXACT_EXTENT(), 0);
return 1;
}
//------------------------------------------------------------------------------
int vtkExtractGrid::RequestData(
vtkInformation *vtkNotUsed(request),
vtkInformationVector **inputVector,
vtkInformationVector *outputVector)
{
// Reset internal helper to the actual extents of the piece we're working on:
vtkInformation *inInfo = inputVector[0]->GetInformationObject(0);
vtkStructuredGrid *inGrid = vtkStructuredGrid::GetData(inInfo);
this->Internal->Initialize(this->VOI, inGrid->GetExtent(), this->SampleRate,
(this->IncludeBoundary != 0));
if (!this->Internal->IsValid())
{
return 0;
}
// Set the output extent -- this is how RequestDataImpl knows what to copy.
vtkInformation *outInfo = outputVector->GetInformationObject(0);
vtkStructuredGrid *output = vtkStructuredGrid::SafeDownCast(
outInfo->Get(vtkDataObject::DATA_OBJECT()));
output->SetExtent(this->Internal->GetOutputWholeExtent());
return this->RequestDataImpl(inputVector, outputVector) ? 1 : 0;
}
//------------------------------------------------------------------------------
bool vtkExtractGrid::RequestDataImpl(vtkInformationVector **inputVector,
vtkInformationVector *outputVector)
{
if( (this->SampleRate[0] < 1) ||
(this->SampleRate[1] < 1) ||
(this->SampleRate[2] < 1) )
{
vtkErrorMacro("SampleRate must be >= 1 in all 3 dimensions!");
return false;
}
// get the info objects
vtkInformation *inInfo = inputVector[0]->GetInformationObject(0);
vtkInformation *outInfo = outputVector->GetInformationObject(0);
// get the input and output
vtkStructuredGrid *input = vtkStructuredGrid::SafeDownCast(
inInfo->Get(vtkDataObject::DATA_OBJECT()));
vtkStructuredGrid *output = vtkStructuredGrid::SafeDownCast(
outInfo->Get(vtkDataObject::DATA_OBJECT()));
if (input->GetNumberOfPoints() == 0)
{
return true;
}
vtkPointData *pd=input->GetPointData();
vtkCellData *cd=input->GetCellData();
vtkPointData *outPD=output->GetPointData();
vtkCellData *outCD=output->GetCellData();
vtkPoints *inPts = input->GetPoints();
int *inExt = input->GetExtent();
vtkPoints *newPts = inPts->NewInstance();
int *outExt = output->GetExtent();
vtkDebugMacro(<< "Extracting Grid");
this->Internal->CopyPointsAndPointData(inExt,outExt,pd,inPts,outPD,newPts);
output->SetPoints(newPts);
newPts->Delete();
this->Internal->CopyCellData(inExt,outExt,cd,outCD);
return true;
}
void vtkExtractGrid::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os,indent);
os << indent << "VOI: \n";
os << indent << " Imin,Imax: (" << this->VOI[0] << ", "
<< this->VOI[1] << ")\n";
os << indent << " Jmin,Jmax: (" << this->VOI[2] << ", "
<< this->VOI[3] << ")\n";
os << indent << " Kmin,Kmax: (" << this->VOI[4] << ", "
<< this->VOI[5] << ")\n";
os << indent << "Sample Rate: (" << this->SampleRate[0] << ", "
<< this->SampleRate[1] << ", "
<< this->SampleRate[2] << ")\n";
os << indent << "Include Boundary: "
<< (this->IncludeBoundary ? "On\n" : "Off\n");
}
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