1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
|
/*=========================================================================
Program: Visualization Toolkit
Module: vtkMatricizeArray.cxx
-------------------------------------------------------------------------
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.
=========================================================================*/
#include "vtkCommand.h"
#include "vtkInformation.h"
#include "vtkInformationVector.h"
#include "vtkMatricizeArray.h"
#include "vtkObjectFactory.h"
#include "vtkSmartPointer.h"
#include "vtkSparseArray.h"
#include <numeric>
///////////////////////////////////////////////////////////////////////////////
// vtkMatricizeArray
vtkStandardNewMacro(vtkMatricizeArray);
vtkMatricizeArray::vtkMatricizeArray() :
SliceDimension(0)
{
}
vtkMatricizeArray::~vtkMatricizeArray()
{
}
void vtkMatricizeArray::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os, indent);
os << indent << "SliceDimension: " << this->SliceDimension << endl;
}
int vtkMatricizeArray::RequestData(
vtkInformation*,
vtkInformationVector** inputVector,
vtkInformationVector* outputVector)
{
vtkArrayData* const input = vtkArrayData::GetData(inputVector[0]);
if(input->GetNumberOfArrays() != 1)
{
vtkErrorMacro(<< "vtkMatricizeArray requires vtkArrayData containing exactly one array as input.");
return 0;
}
vtkSparseArray<double>* const input_array = vtkSparseArray<double>::SafeDownCast(
input->GetArray(static_cast<vtkIdType>(0)));
if(!input_array)
{
vtkErrorMacro(<< "vtkMatricizeArray requires a vtkSparseArray<double> as input.");
return 0;
}
if(this->SliceDimension < 0 || this->SliceDimension >= input_array->GetDimensions())
{
vtkErrorMacro(<< "Slice dimension " << this->SliceDimension << " out-of-range for array with " << input_array->GetDimensions() << " dimensions.");
return 0;
}
vtkSparseArray<double>* const output_array = vtkSparseArray<double>::New();
// Compute the extents of the output array ...
const vtkArrayExtents input_extents = input_array->GetExtents();
vtkArrayExtents output_extents(0, 0);
output_extents[0] = input_extents[this->SliceDimension];
output_extents[1] = vtkArrayRange(0, input_extents.GetSize() / input_extents[this->SliceDimension].GetSize());
output_array->Resize(output_extents);
// "Map" every non-null element in the input array to its position in the output array.
// Indices in the slice dimension map directly to the row index in the output.
// The remaining coordinates are multiplied by a "stride" value for each dimension and
// the results are summed to compute the output column index.
//
// Setting the slice-dimension stride to zero simplifies computation of column coordinates
// later-on and eliminate an inner-loop comparison.
std::vector<vtkIdType> strides(input_array->GetDimensions());
for(vtkIdType i = input_array->GetDimensions() - 1, stride = 1; i >= 0; --i)
{
if(i == this->SliceDimension)
{
strides[i] = 0;
}
else
{
strides[i] = stride;
stride *= input_extents[i].GetSize();
}
}
std::vector<vtkIdType> temp(input_array->GetDimensions());
vtkArrayCoordinates coordinates;
vtkArrayCoordinates new_coordinates(0, 0);
const vtkIdType element_count = input_array->GetNonNullSize();
for(vtkIdType n = 0; n != element_count; ++n)
{
input_array->GetCoordinatesN(n, coordinates);
new_coordinates[0] = coordinates[this->SliceDimension];
for(vtkIdType i = 0; i != coordinates.GetDimensions(); ++i)
temp[i] = (coordinates[i] - input_extents[i].GetBegin()) * strides[i];
new_coordinates[1] = std::accumulate(temp.begin(), temp.end(), 0);
output_array->AddValue(new_coordinates, input_array->GetValueN(n));
}
vtkArrayData* const output = vtkArrayData::GetData(outputVector);
output->ClearArrays();
output->AddArray(output_array);
output_array->Delete();
return 1;
}
|
