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LSST Data Management Base Package
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A 2-d coordinate transform represented by a pair of standard polynomials (one for each coordinate). More...
#include <PolynomialTransform.h>
Public Member Functions | |
PolynomialTransform (ndarray::Array< double const, 2, 0 > const &xCoeffs, ndarray::Array< double const, 2, 0 > const &yCoeffs) | |
Construct a new transform from existing coefficient arrays. | |
PolynomialTransform (PolynomialTransform const &other) | |
Copy constructor. | |
PolynomialTransform (PolynomialTransform &&other) | |
Move constructor. | |
PolynomialTransform & | operator= (PolynomialTransform const &other) |
Copy assignment. | |
PolynomialTransform & | operator= (PolynomialTransform &&other) |
Move constructor. | |
void | swap (PolynomialTransform &other) |
Lightweight swap. | |
int | getOrder () const |
Return the order of the polynomials. | |
ndarray::Array< double const, 2, 2 > | getXCoeffs () const |
2-D polynomial coefficients that compute the output x coordinate. | |
ndarray::Array< double const, 2, 2 > | getYCoeffs () const |
2-D polynomial coefficients that compute the output x coordinate. | |
geom::AffineTransform | linearize (geom::Point2D const &in) const |
Return an approximate affine transform at the given point. | |
geom::Point2D | operator() (geom::Point2D const &in) const |
Apply the transform to a point. | |
Static Public Member Functions | |
static PolynomialTransform | convert (ScaledPolynomialTransform const &other) |
Convert a ScaledPolynomialTransform to an equivalent PolynomialTransform. | |
static PolynomialTransform | convert (SipForwardTransform const &other) |
Convert a SipForwardTransform to an equivalent PolynomialTransform. | |
static PolynomialTransform | convert (SipReverseTransform const &other) |
Convert a SipReverseTransform to an equivalent PolynomialTransform. | |
Friends | |
class | ScaledPolynomialTransformFitter |
class | SipForwardTransform |
class | SipReverseTransform |
class | ScaledPolynomialTransform |
PolynomialTransform | compose (geom::AffineTransform const &t1, PolynomialTransform const &t2) |
Return a PolynomialTransform that is equivalent to the composition t1(t2()) | |
PolynomialTransform | compose (PolynomialTransform const &t1, geom::AffineTransform const &t2) |
Return a PolynomialTransform that is equivalent to the composition t1(t2()) | |
Related Symbols | |
(Note that these are not member symbols.) | |
compose | |
A 2-d coordinate transform represented by a pair of standard polynomials (one for each coordinate).
PolynomialTransform instances should be confined to a single thread.
Definition at line 45 of file PolynomialTransform.h.
lsst::meas::astrom::PolynomialTransform::PolynomialTransform | ( | ndarray::Array< double const, 2, 0 > const & | xCoeffs, |
ndarray::Array< double const, 2, 0 > const & | yCoeffs ) |
Construct a new transform from existing coefficient arrays.
For both input arguments, the array element at [p, q] corresponds to the polynomial term x^p y^q.
Both arrays are expected be square and triangular; if N is the order of the transform, both arrays should be (N+1)x(N+1), and elements with p + q > N should be zero.
Definition at line 74 of file PolynomialTransform.cc.
lsst::meas::astrom::PolynomialTransform::PolynomialTransform | ( | PolynomialTransform const & | other | ) |
Copy constructor.
Coefficient arrays are deep-copied.
Definition at line 97 of file PolynomialTransform.cc.
lsst::meas::astrom::PolynomialTransform::PolynomialTransform | ( | PolynomialTransform && | other | ) |
Move constructor.
Coefficient arrays are moved.
Definition at line 103 of file PolynomialTransform.cc.
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Convert a ScaledPolynomialTransform to an equivalent PolynomialTransform.
Definition at line 36 of file PolynomialTransform.cc.
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Convert a SipForwardTransform to an equivalent PolynomialTransform.
Definition at line 40 of file PolynomialTransform.cc.
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Convert a SipReverseTransform to an equivalent PolynomialTransform.
Definition at line 51 of file PolynomialTransform.cc.
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Return the order of the polynomials.
Definition at line 107 of file PolynomialTransform.h.
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2-D polynomial coefficients that compute the output x coordinate.
Indexing the result by [p][q] gives the coefficient of \(x_{\mathrm{in}}^p\,y_{\mathrm{in}}^q\).
Definition at line 115 of file PolynomialTransform.h.
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2-D polynomial coefficients that compute the output x coordinate.
Indexing the result by [p][q] gives the coefficient of \(x_{\mathrm{in}}^p\,y_{\mathrm{in}}^q\).
Definition at line 123 of file PolynomialTransform.h.
geom::AffineTransform lsst::meas::astrom::PolynomialTransform::linearize | ( | geom::Point2D const & | in | ) | const |
Return an approximate affine transform at the given point.
Definition at line 129 of file PolynomialTransform.cc.
geom::Point2D lsst::meas::astrom::PolynomialTransform::operator() | ( | geom::Point2D const & | in | ) | const |
Apply the transform to a point.
Definition at line 157 of file PolynomialTransform.cc.
PolynomialTransform & lsst::meas::astrom::PolynomialTransform::operator= | ( | PolynomialTransform && | other | ) |
Move constructor.
Coefficient arrays are moved.
Definition at line 115 of file PolynomialTransform.cc.
PolynomialTransform & lsst::meas::astrom::PolynomialTransform::operator= | ( | PolynomialTransform const & | other | ) |
Copy assignment.
Coefficient arrays are deep-copied.
Definition at line 107 of file PolynomialTransform.cc.
void lsst::meas::astrom::PolynomialTransform::swap | ( | PolynomialTransform & | other | ) |
Lightweight swap.
Definition at line 122 of file PolynomialTransform.cc.
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This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.
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Return a PolynomialTransform that is equivalent to the composition t1(t2())
The returned composition would be exact in ideal arithmetic, but may suffer from significant round-off error for high-order polynomials.
Definition at line 214 of file PolynomialTransform.cc.
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Return a PolynomialTransform that is equivalent to the composition t1(t2())
The returned composition would be exact in ideal arithmetic, but may suffer from significant round-off error for high-order polynomials.
Definition at line 225 of file PolynomialTransform.cc.
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friend |
Definition at line 143 of file PolynomialTransform.h.
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friend |
Definition at line 140 of file PolynomialTransform.h.
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friend |
Definition at line 141 of file PolynomialTransform.h.
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friend |
Definition at line 142 of file PolynomialTransform.h.