LSSTApplications  20.0.0
LSSTDataManagementBasePackage
TrapezoidalPacker.cc
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1 // -*- LSST-C++ -*-
2 /*
3  * LSST Data Management System
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6  * This product includes software developed by the
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23 
25 
26 namespace lsst {
27 namespace afw {
28 namespace math {
29 namespace detail {
30 
32  : nx(ctrl.orderX + 1), ny(ctrl.orderY + 1) {
33  if (ctrl.triangular) {
34  if (nx >= ny) {
35  m = 0;
36  size = (nx - ny) * ny + (ny * (ny + 1)) / 2;
37  } else {
38  m = ny - nx;
39  size = m * nx + (nx * (nx + 1)) / 2;
40  }
41  } else {
42  m = ny;
43  size = nx * ny;
44  }
45 }
46 
47 void TrapezoidalPacker::pack(ndarray::Array<double, 1, 1> const& out,
48  ndarray::Array<double const, 1, 1> const& tx,
49  ndarray::Array<double const, 1, 1> const& ty) const {
50  double* outIter = out.begin();
51  for (int i = 0; i < m; ++i) { // loop over rectangular part
52  for (int j = 0; j < nx; ++j, ++outIter) {
53  *outIter = ty[i] * tx[j];
54  }
55  }
56  for (int i = m; i < ny; ++i) { // loop over wide trapezoidal part
57  for (int j = 0, nj = nx + m - i; j < nj; ++j, ++outIter) {
58  *outIter = ty[i] * tx[j];
59  }
60  }
61 }
62 
63 void TrapezoidalPacker::pack(ndarray::Array<double, 1, 1> const& out,
64  ndarray::Array<double const, 2, 2> const& unpacked) const {
65  double* outIter = out.begin();
66  for (int i = 0; i < m; ++i) { // loop over rectangular part
67  ndarray::Array<double const, 1, 1> unpackedRow = unpacked[i];
68  for (int j = 0; j < nx; ++j, ++outIter) {
69  *outIter = unpackedRow[j];
70  }
71  }
72  for (int i = m; i < ny; ++i) { // loop over wide trapezoidal part
73  ndarray::Array<double const, 1, 1> unpackedRow = unpacked[i];
74  for (int j = 0, nj = nx + m - i; j < nj; ++j, ++outIter) {
75  *outIter = unpackedRow[j];
76  }
77  }
78 }
79 
80 void TrapezoidalPacker::unpack(ndarray::Array<double, 2, 2> const& out,
81  ndarray::Array<double const, 1, 1> const& packed) const {
82  out.deep() = 0.0;
83  double const* packedIter = packed.begin();
84  for (int i = 0; i < m; ++i) { // loop over rectangular part
85  ndarray::Array<double, 1, 1> outRow = out[i];
86  for (int j = 0; j < nx; ++j, ++packedIter) {
87  outRow[j] = *packedIter;
88  }
89  }
90  for (int i = m; i < ny; ++i) { // loop over wide trapezoidal part
91  ndarray::Array<double, 1, 1> outRow = out[i];
92  for (int j = 0, nj = nx + m - i; j < nj; ++j, ++packedIter) {
93  outRow[j] = *packedIter;
94  }
95  }
96 }
97 
98 ndarray::Array<double, 2, 2> TrapezoidalPacker::unpack(
99  ndarray::Array<double const, 1, 1> const& packed) const {
100  ndarray::Array<double, 2, 2> out = ndarray::allocate(ny, nx);
101  unpack(out, packed);
102  return out;
103 }
104 } // namespace detail
105 } // namespace math
106 } // namespace afw
107 } // namespace lsst
lsst::afw::math::detail::TrapezoidalPacker::nx
int nx
Definition: TrapezoidalPacker.h:104
lsst::afw::math::ChebyshevBoundedFieldControl
A control object used when fitting ChebyshevBoundedField to data (see ChebyshevBoundedField::fit)
Definition: ChebyshevBoundedField.h:38
lsst::afw::math::detail::TrapezoidalPacker::m
int m
Definition: TrapezoidalPacker.h:106
lsst::afw
Definition: imageAlgorithm.dox:1
lsst::afw::math::detail::TrapezoidalPacker::pack
void pack(ndarray::Array< double, 1, 1 > const &out, ndarray::Array< double const, 1, 1 > const &tx, ndarray::Array< double const, 1, 1 > const &ty) const
Definition: TrapezoidalPacker.cc:47
lsst::afw::math::detail::TrapezoidalPacker::TrapezoidalPacker
TrapezoidalPacker(ChebyshevBoundedFieldControl const &ctrl)
Definition: TrapezoidalPacker.cc:31
orderX
table::Key< int > orderX
Definition: ChebyshevBoundedField.cc:316
lsst::afw::math::detail::TrapezoidalPacker::size
int size
Definition: TrapezoidalPacker.h:107
TrapezoidalPacker.h
lsst::afw::math::detail::TrapezoidalPacker::unpack
void unpack(ndarray::Array< double, 2, 2 > const &out, ndarray::Array< double const, 1, 1 > const &packed) const
Definition: TrapezoidalPacker.cc:80
lsst
A base class for image defects.
Definition: imageAlgorithm.dox:1
lsst::afw::math::ChebyshevBoundedFieldControl::triangular
bool triangular
"if true, only include terms where the sum of the x and y order " "is less than or equal to max(order...
Definition: ChebyshevBoundedField.h:48
lsst::afw::math::detail::TrapezoidalPacker::ny
int ny
Definition: TrapezoidalPacker.h:105