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81 lines
2.7 KiB
Plaintext
81 lines
2.7 KiB
Plaintext
3 weeks ago
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/*=========================================================================
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Program: Visualization Toolkit
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Module: vtkArrayInterpolate.txx
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-------------------------------------------------------------------------
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Copyright 2008 Sandia Corporation.
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Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
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the U.S. Government retains certain rights in this software.
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-------------------------------------------------------------------------
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Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
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All rights reserved.
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See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
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This software is distributed WITHOUT ANY WARRANTY; without even
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the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE. See the above copyright notice for more information.
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=========================================================================*/
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#ifndef vtkArrayInterpolate_txx
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#define vtkArrayInterpolate_txx
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#include "vtkArrayExtentsList.h"
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#include "vtkArrayWeights.h"
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template <typename T>
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void vtkInterpolate(vtkTypedArray<T>* source_array, const vtkArrayExtentsList& source_slices,
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const vtkArrayWeights& source_weights, const vtkArrayExtents& target_slice,
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vtkTypedArray<T>* target_array)
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{
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if (!target_array->GetExtents().Contains(target_slice))
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{
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vtkGenericWarningMacro(<< "Target array does not contain target slice.");
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return;
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}
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if (source_slices.GetCount() != source_weights.GetCount())
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{
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vtkGenericWarningMacro(<< "Source slice and weight counts must match.");
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return;
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}
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for (int i = 0; i != source_slices.GetCount(); ++i)
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{
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if (!target_slice.SameShape(source_slices[i]))
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{
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vtkGenericWarningMacro(<< "Source and target slice shapes must match: " << source_slices[i]
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<< " versus " << target_slice);
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return;
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}
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}
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// Zero-out the target storage ...
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const vtkIdType n_begin = 0;
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const vtkIdType n_end = target_slice.GetSize();
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vtkArrayCoordinates target_coordinates;
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for (vtkIdType n = n_begin; n != n_end; ++n)
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{
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target_slice.GetLeftToRightCoordinatesN(n, target_coordinates);
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target_array->SetValue(target_coordinates, 0);
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}
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// Accumulate results ...
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vtkArrayCoordinates source_coordinates;
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for (vtkIdType n = n_begin; n != n_end; ++n)
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{
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target_slice.GetLeftToRightCoordinatesN(n, target_coordinates);
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for (int source = 0; source != source_slices.GetCount(); ++source)
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{
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source_slices[source].GetLeftToRightCoordinatesN(n, source_coordinates);
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target_array->SetValue(target_coordinates,
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target_array->GetValue(target_coordinates) +
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(source_array->GetValue(source_coordinates) * source_weights[source]));
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}
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}
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}
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#endif
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