LSSTApplications  20.0.0
LSSTDataManagementBasePackage
LinearTransform.cc
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21 
22 #include <iostream>
23 #include <iomanip>
24 
25 #include "Eigen/LU"
26 
28 
29 namespace lsst {
30 namespace geom {
31 
34  r << (*this)[XX], (*this)[YX], (*this)[XY], (*this)[YY];
35  return r;
36 }
37 
39  (*this)[XX] = vector[XX];
40  (*this)[XY] = vector[XY];
41  (*this)[YX] = vector[YX];
42  (*this)[YY] = vector[YY];
43 }
44 
46  Eigen::FullPivLU<Matrix> lu(getMatrix());
47  if (!lu.isInvertible()) {
48  throw LSST_EXCEPT(SingularTransformException, "Could not compute LinearTransform inverse");
49  }
50  Matrix inv = lu.inverse();
51  return LinearTransform(inv);
52 }
53 
54 double LinearTransform::computeDeterminant() const noexcept { return getMatrix().determinant(); }
55 
57  TransformDerivativeMatrix r = TransformDerivativeMatrix::Zero();
58  r(0, XX) = input.getX();
59  r(0, XY) = input.getY();
60  r(1, YX) = input.getX();
61  r(1, YY) = input.getY();
62  return r;
63 }
64 
66  std::ios::fmtflags flags = os.flags();
67  int prec = os.precision(7);
68  os.setf(std::ios::fixed);
69  os << "LinearTransform([(" << std::setw(10) << t[LinearTransform::XX] << "," << std::setw(10)
70  << t[LinearTransform::XY] << "),\n";
71  os << " (" << std::setw(10) << t[LinearTransform::YX] << "," << std::setw(10)
72  << t[LinearTransform::YY] << ")])";
73  os.precision(prec);
74  os.flags(flags);
75  return os;
76 }
77 
78 } // namespace geom
79 } // namespace lsst
lsst::geom::LinearTransform::XX
@ XX
Definition: LinearTransform.h:71
lsst::geom::LinearTransform
A 2D linear coordinate transformation.
Definition: LinearTransform.h:69
lsst::geom::LinearTransform::XY
@ XY
Definition: LinearTransform.h:71
lsst::geom::LinearTransform::YX
@ YX
Definition: LinearTransform.h:71
std::ostream
STL class.
lsst::geom::LinearTransform::YY
@ YY
Definition: LinearTransform.h:71
lsst::geom::LinearTransform::getParameterVector
ParameterVector const getParameterVector() const noexcept
Return the transform matrix elements as a parameter vector.
Definition: LinearTransform.cc:32
std::ostream::setf
T setf(T... args)
lsst::geom::LinearTransform::LinearTransform
LinearTransform() noexcept
Construct an empty (identity) LinearTransform.
Definition: LinearTransform.h:80
LinearTransform.h
lsst::geom::LinearTransform::inverted
LinearTransform const inverted() const
Return the inverse transform.
Definition: LinearTransform.cc:45
std::ostream::flags
T flags(T... args)
lsst::geom::LinearTransform::ParameterVector
Eigen::Matrix< double, 4, 1 > ParameterVector
Definition: LinearTransform.h:73
lsst::geom::LinearTransform::getMatrix
Matrix const & getMatrix() const noexcept
Definition: LinearTransform.h:151
lsst
A base class for image defects.
Definition: imageAlgorithm.dox:1
lsst::geom::operator<<
std::ostream & operator<<(std::ostream &os, lsst::geom::AffineTransform const &transform)
Definition: AffineTransform.cc:72
LSST_EXCEPT
#define LSST_EXCEPT(type,...)
Create an exception with a given type.
Definition: Exception.h:48
lsst::geom
Definition: geomOperators.dox:4
os
std::ostream * os
Definition: Schema.cc:746
lsst::geom::LinearTransform::setParameterVector
void setParameterVector(ParameterVector const &vector) noexcept
Set the transform matrix elements from a parameter vector.
Definition: LinearTransform.cc:38
lsst::geom::LinearTransform::computeDeterminant
double computeDeterminant() const noexcept
Return the determinant of the 2x2 matrix.
Definition: LinearTransform.cc:54
lsst::geom::Point< double, 2 >
lsst::geom::LinearTransform::TransformDerivativeMatrix
Eigen::Matrix< double, 2, 4 > TransformDerivativeMatrix
Definition: LinearTransform.h:74
lsst::geom::SingularTransformException
Definition: LinearTransform.h:36
lsst::geom::LinearTransform::Matrix
Eigen::Matrix< double, 2, 2, Eigen::DontAlign > Matrix
Definition: LinearTransform.h:77
std::setw
T setw(T... args)
lsst::geom::LinearTransform::dTransform
TransformDerivativeMatrix dTransform(Point2D const &input) const noexcept
Derivative of (*this)(input) with respect to the transform elements (for Point).
Definition: LinearTransform.cc:56
std::ostream::precision
T precision(T... args)