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/*=========================================================================
Program: Visualization Toolkit
Module: vtkWarpTo.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 "vtkWarpTo.h"
#include "vtkInformation.h"
#include "vtkInformationVector.h"
#include "vtkMath.h"
#include "vtkObjectFactory.h"
#include "vtkPointData.h"
#include "vtkPointSet.h"
#include "vtkPoints.h"
vtkStandardNewMacro(vtkWarpTo);
vtkWarpTo::vtkWarpTo()
{
this->ScaleFactor = 0.5;
this->Absolute = 0;
this->Position[0] = this->Position[1] = this->Position[2] = 0.0;
}
int vtkWarpTo::RequestData(
vtkInformation *vtkNotUsed(request),
vtkInformationVector **inputVector,
vtkInformationVector *outputVector)
{
// get the info objects
vtkInformation *inInfo = inputVector[0]->GetInformationObject(0);
vtkInformation *outInfo = outputVector->GetInformationObject(0);
// get the input and output
vtkPointSet *input = vtkPointSet::SafeDownCast(
inInfo->Get(vtkDataObject::DATA_OBJECT()));
vtkPointSet *output = vtkPointSet::SafeDownCast(
outInfo->Get(vtkDataObject::DATA_OBJECT()));
vtkPoints *inPts;
vtkPoints *newPts;
vtkIdType ptId, numPts;
int i;
double x[3], newX[3];
double mag;
double minMag = 0;
vtkDebugMacro(<<"Warping data to a point");
// First, copy the input to the output as a starting point
output->CopyStructure( input );
inPts = input->GetPoints();
if (!inPts )
{
vtkErrorMacro(<<"No input data");
return 1;
}
numPts = inPts->GetNumberOfPoints();
newPts = vtkPoints::New(); newPts->SetNumberOfPoints(numPts);
if (this->Absolute)
{
minMag = 1.0e10;
for (ptId=0; ptId < numPts; ptId++)
{
inPts->GetPoint(ptId, x);
mag = sqrt(vtkMath::Distance2BetweenPoints(this->Position,x));
if (mag < minMag)
{
minMag = mag;
}
}
}
//
// Loop over all points, adjusting locations
//
for (ptId=0; ptId < numPts; ptId++)
{
inPts->GetPoint(ptId, x);
if (this->Absolute)
{
mag = sqrt(vtkMath::Distance2BetweenPoints(this->Position,x));
for (i=0; i<3; i++)
{
newX[i] = this->ScaleFactor*
(this->Position[i] + minMag*(x[i] - this->Position[i])/mag) +
(1.0 - this->ScaleFactor)*x[i];
}
}
else
{
for (i=0; i<3; i++)
{
newX[i] = (1.0 - this->ScaleFactor)*x[i] +
this->ScaleFactor*this->Position[i];
}
}
newPts->SetPoint(ptId, newX);
}
//
// Update ourselves and release memory
//
output->GetPointData()->CopyNormalsOff(); // distorted geometry
output->GetPointData()->PassData(input->GetPointData());
output->SetPoints(newPts);
newPts->Delete();
return 1;
}
void vtkWarpTo::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os,indent);
os << indent << "Absolute: " << (this->Absolute ? "On\n" : "Off\n");
os << indent << "Position: (" << this->Position[0] << ", "
<< this->Position[1] << ", " << this->Position[2] << ")\n";
os << indent << "Scale Factor: " << this->ScaleFactor << "\n";
}
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