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vtkArrayInterpolate.txx
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vtkArrayInterpolate.txx
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/*=========================================================================
Program: Visualization Toolkit
Module: vtkArrayInterpolate.txx
-------------------------------------------------------------------------
Copyright 2008 Sandia Corporation.
Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
the U.S. Government retains certain rights in this software.
-------------------------------------------------------------------------
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.
=========================================================================*/
#ifndef vtkArrayInterpolate_txx
#define vtkArrayInterpolate_txx
#include "vtkArrayExtentsList.h"
#include "vtkArrayWeights.h"
template<typename T>
void vtkInterpolate(
vtkTypedArray<T>* source_array,
const vtkArrayExtentsList& source_slices,
const vtkArrayWeights& source_weights,
const vtkArrayExtents& target_slice,
vtkTypedArray<T>* target_array)
{
if(!target_array->GetExtents().Contains(target_slice))
{
vtkGenericWarningMacro(<< "Target array does not contain target slice.");
return;
}
if(source_slices.GetCount() != source_weights.GetCount())
{
vtkGenericWarningMacro(<< "Source slice and weight counts must match.");
return;
}
for(int i = 0; i != source_slices.GetCount(); ++i)
{
if(!target_slice.SameShape(source_slices[i]))
{
vtkGenericWarningMacro(<< "Source and target slice shapes must match: " << source_slices[i] << " versus " << target_slice);
return;
}
}
// Zero-out the target storage ...
const vtkIdType n_begin = 0;
const vtkIdType n_end = target_slice.GetSize();
vtkArrayCoordinates target_coordinates;
for(vtkIdType n = n_begin; n != n_end; ++n)
{
target_slice.GetLeftToRightCoordinatesN(n, target_coordinates);
target_array->SetValue(target_coordinates, 0);
}
// Accumulate results ...
vtkArrayCoordinates source_coordinates;
for(vtkIdType n = n_begin; n != n_end; ++n)
{
target_slice.GetLeftToRightCoordinatesN(n, target_coordinates);
for(int source = 0; source != source_slices.GetCount(); ++source)
{
source_slices[source].GetLeftToRightCoordinatesN(n, source_coordinates);
target_array->SetValue(target_coordinates, target_array->GetValue(target_coordinates) + (source_array->GetValue(source_coordinates) * source_weights[source]));
}
}
}
#endif