lsst::afw::geom::SipApproximation::Solution Struct Reference

Public Types
using	Workspace = poly::PolynomialFunction2dYX::Workspace

Public Member Functions
	Solution (poly::PolynomialFunction2dYX const &a_, poly::PolynomialFunction2dYX const &b_, poly::PolynomialFunction2dYX const &ap_, poly::PolynomialFunction2dYX const &bp_)
Workspace	makeWorkspace () const
lsst::geom::Point2D	applyForward (lsst::geom::Point2D const &dpix, Workspace &ws) const
lsst::geom::Point2D	applyInverse (lsst::geom::Point2D const &siwc, Workspace &ws) const

Static Public Member Functions
static std::unique_ptr< Solution >	fit (int order_, double svdThreshold, SipApproximation const &parent)

Public Attributes
poly::PolynomialFunction2dYX	a
poly::PolynomialFunction2dYX	b
poly::PolynomialFunction2dYX	ap
poly::PolynomialFunction2dYX	bp

Detailed Description

Definition at line 121 of file SipApproximation.cc.

Member Typedef Documentation

Workspace

using lsst::afw::geom::SipApproximation::Solution::Workspace = poly::PolynomialFunction2dYX::Workspace

Definition at line 142 of file SipApproximation.cc.

Constructor & Destructor Documentation

Solution()

lsst::afw::geom::SipApproximation::Solution::Solution ( poly::PolynomialFunction2dYX const &  a_, poly::PolynomialFunction2dYX const &  b_, poly::PolynomialFunction2dYX const &  ap_, poly::PolynomialFunction2dYX const &  bp_  )

inline

Definition at line 125 of file SipApproximation.cc.

                                                     :
        a(a_), b(b_), ap(ap_), bp(bp_)
    {
        LSST_THROW_IF_NE(a.getBasis().getOrder(), b.getBasis().getOrder(),
                         pex::exceptions::InvalidParameterError,
                         "A and B polynomials must have the same order (%d != %d).");
        LSST_THROW_IF_NE(a.getBasis().getOrder(), ap.getBasis().getOrder(),
                         pex::exceptions::InvalidParameterError,
                         "A and AP polynomials must have the same order (%d != %d).");
        LSST_THROW_IF_NE(a.getBasis().getOrder(), bp.getBasis().getOrder(),
                         pex::exceptions::InvalidParameterError,
                         "A and BP polynomials must have the same order (%d != %d).");
    }

Member Function Documentation

applyForward()

lsst::geom::Point2D lsst::afw::geom::SipApproximation::Solution::applyForward ( lsst::geom::Point2D const &  dpix, Workspace &  ws  ) const

inline

Definition at line 146 of file SipApproximation.cc.

                                                                                     {
        return dpix + lsst::geom::Extent2D(a(dpix, ws), b(dpix, ws));
    }

applyInverse()

lsst::geom::Point2D lsst::afw::geom::SipApproximation::Solution::applyInverse ( lsst::geom::Point2D const &  siwc, Workspace &  ws  ) const

inline

Definition at line 150 of file SipApproximation.cc.

                                                                                     {
        return siwc + lsst::geom::Extent2D(ap(siwc, ws), bp(siwc, ws));
    }

fit()

std::unique_ptr< SipApproximation::Solution > lsst::afw::geom::SipApproximation::Solution::fit ( int  order_, double  svdThreshold, SipApproximation const &  parent  )

static

Definition at line 183 of file SipApproximation.cc.

  {
    poly::PolynomialBasis2dYX basis(order);
    if (basis.size() > parent._grid->dpix1.size()) {
        throw LSST_EXCEPT(
            pex::exceptions::LogicError,
            (boost::format("Number of parameters (%d) is larger than number of data points (%d)")
             % (2*basis.size()) % (2*parent._grid->dpix1.size())).str()
        );
    }
 
    lsst::geom::Box2D boxFwd(parent._bbox);
    boxFwd.shift(-parent._crpix);
    auto fwd = fitSipOneDirection(order, boxFwd, svdThreshold, parent._grid->dpix1, parent._grid->siwc);
 
    lsst::geom::Box2D boxInv;
    for (auto const & point : parent._grid->siwc) {
        boxInv.include(point);
    }
    auto inv = fitSipOneDirection(order, boxInv, svdThreshold, parent._grid->siwc, parent._grid->dpix2);
 
    return std::make_unique<Solution>(fwd.first, fwd.second, inv.first, inv.second);
}

makeWorkspace()

Workspace lsst::afw::geom::SipApproximation::Solution::makeWorkspace ( ) const

inline

Definition at line 144 of file SipApproximation.cc.

{ return a.makeWorkspace(); }

Member Data Documentation

a

poly::PolynomialFunction2dYX lsst::afw::geom::SipApproximation::Solution::a

Definition at line 154 of file SipApproximation.cc.

ap

poly::PolynomialFunction2dYX lsst::afw::geom::SipApproximation::Solution::ap

Definition at line 156 of file SipApproximation.cc.

b

poly::PolynomialFunction2dYX lsst::afw::geom::SipApproximation::Solution::b

Definition at line 155 of file SipApproximation.cc.

bp

poly::PolynomialFunction2dYX lsst::afw::geom::SipApproximation::Solution::bp

Definition at line 157 of file SipApproximation.cc.

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The documentation for this struct was generated from the following file:

• /j/snowflake/release/lsstsw/stack/0.4.3/Linux64/afw/21.0.0-25-g1d57be3cd+e73869a214/src/geom/SipApproximation.cc