lsst.geom  15.0-1-g417ea41+3
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 
55  Eigen::MatrixXd const& m = getMatrix();
56  return m(0, 0) * m(1, 1) - m(0, 1) * m(1, 0);
57 }
58 
60  TransformDerivativeMatrix r = TransformDerivativeMatrix::Zero();
61  r(0, XX) = input.getX();
62  r(0, XY) = input.getY();
63  r(1, YX) = input.getX();
64  r(1, YY) = input.getY();
65  return r;
66 }
67 
69  std::ios::fmtflags flags = os.flags();
70  int prec = os.precision(7);
71  os.setf(std::ios::fixed);
72  os << "LinearTransform([(" << std::setw(10) << t[LinearTransform::XX] << "," << std::setw(10)
73  << t[LinearTransform::XY] << "),\n";
74  os << " (" << std::setw(10) << t[LinearTransform::YX] << "," << std::setw(10)
75  << t[LinearTransform::YY] << ")])";
76  os.precision(prec);
77  os.flags(flags);
78  return os;
79 }
80 
81 } // namespace geom
82 } // namespace lsst
TransformDerivativeMatrix dTransform(Point2D const &input) const
Derivative of (*this)(input) with respect to the transform elements (for Point).
T setf(T... args)
Eigen::Matrix< double, 2, 4 > TransformDerivativeMatrix
T precision(T... args)
Eigen::Matrix< double, 2, 2, Eigen::DontAlign > Matrix
ParameterVector const getParameterVector() const
Return the transform matrix elements as a parameter vector.
T setw(T... args)
LinearTransform const invert() const
Return the inverse transform.
T flags(T... args)
void setParameterVector(ParameterVector const &vector)
Set the transform matrix elements from a parameter vector.
double computeDeterminant() const
Return the determinant of the 2x2 matrix.
std::ostream & operator<<(std::ostream &os, lsst::geom::AffineTransform const &transform)
Eigen::Matrix< double, 4, 1 > ParameterVector
Matrix const & getMatrix() const
#define LSST_EXCEPT(type,...)
LinearTransform()
Construct an empty (identity) LinearTransform.
m
STL class.
A 2D linear coordinate transformation.