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lsst::jointcal::GtransfoIdentity Class Reference

A do-nothing transformation. It anyway has dummy routines to mimick a Gtransfo. More...

#include <Gtransfo.h>

Inheritance diagram for lsst::jointcal::GtransfoIdentity:
lsst::jointcal::Gtransfo

Public Member Functions

 GtransfoIdentity ()
 constructor. More...
 
void apply (const double xIn, const double yIn, double &xOut, double &yOut) const
 xOut = xIn; yOut = yIn ! More...
 
double fit (const StarMatchList &starMatchList)
 fits a transfo to a std::list of Point pairs (p1,p2, the Point fields in StarMatch). More...
 
std::unique_ptr< GtransforeduceCompo (const Gtransfo *right) const
 to be overloaded by derived classes if they can really "reduce" the composition (e.g. More...
 
void dump (std::ostream &stream=std::cout) const
 dumps the transfo coefficients to stream. More...
 
int getNpar () const
 returns the number of parameters (to compute chi2's) More...
 
std::unique_ptr< Gtransfoclone () const
 returns a copy (allocated by new) of the transformation. More...
 
void computeDerivative (const Point &where, GtransfoLin &derivative, const double step=0.01) const
 Computes the local Derivative of a transfo. Step is used for numerical derivation. More...
 
virtual GtransfoLin linearApproximation (const Point &where, const double step=0.01) const
 linear approximation. More...
 
void write (std::ostream &s) const
 
void read (std::istream &s)
 
- Public Member Functions inherited from lsst::jointcal::Gtransfo
void apply (const Point &in, Point &out) const
 applies the tranfo to in and writes into out. Is indeed virtual. More...
 
Point apply (const Point &in) const
 All these apply(..) shadow the virtual one in derived classes, unless one writes "using Gtransfo::apply". More...
 
std::string __str__ ()
 
void transformStar (FatPoint &in) const
 allows to write MyTransfo(MyStar) More...
 
virtual double getJacobian (const Point &point) const
 returns the local jacobian. More...
 
virtual double getJacobian (const double x, const double y) const
 returns the local jacobian. More...
 
virtual void transformPosAndErrors (const FatPoint &in, FatPoint &out) const
 
virtual void transformErrors (const Point &where, const double *vIn, double *vOut) const
 transform errors (represented as double[3] in order V(xx),V(yy),Cov(xy)) More...
 
virtual std::unique_ptr< GtransfoinverseTransfo (const double precision, const Frame &region) const
 returns an inverse transfo. Numerical if not overloaded. More...
 
void getParams (double *params) const
 params should be at least Npar() long More...
 
void offsetParams (const double *params)
 
virtual double paramRef (const int i) const
 
virtual double & paramRef (const int i)
 
virtual void paramDerivatives (const Point &where, double *dx, double *dy) const
 Derivative w.r.t parameters. More...
 
virtual std::unique_ptr< GtransforoughInverse (const Frame &region) const
 Rough inverse. More...
 
void write (const std::string &fileName) const
 
virtual ~Gtransfo ()
 

Detailed Description

A do-nothing transformation. It anyway has dummy routines to mimick a Gtransfo.

Definition at line 144 of file Gtransfo.h.

Constructor & Destructor Documentation

lsst::jointcal::GtransfoIdentity::GtransfoIdentity ( )
inline

constructor.

Definition at line 147 of file Gtransfo.h.

Member Function Documentation

void lsst::jointcal::GtransfoIdentity::apply ( const double  xIn,
const double  yIn,
double &  xOut,
double &  yOut 
) const
inlinevirtual

xOut = xIn; yOut = yIn !

Implements lsst::jointcal::Gtransfo.

Definition at line 150 of file Gtransfo.h.

std::unique_ptr<Gtransfo> lsst::jointcal::GtransfoIdentity::clone ( ) const
inlinevirtual

returns a copy (allocated by new) of the transformation.

Implements lsst::jointcal::Gtransfo.

Definition at line 164 of file Gtransfo.h.

void lsst::jointcal::GtransfoIdentity::computeDerivative ( const Point where,
GtransfoLin derivative,
const double  step = 0.01 
) const
virtual

Computes the local Derivative of a transfo. Step is used for numerical derivation.

the Derivative is represented by a GtransfoLin, in which (hopefully), the offset terms are zero.

Derivative should transform a vector of offsets into a vector of offsets.

Reimplemented from lsst::jointcal::Gtransfo.

Definition at line 385 of file Gtransfo.cc.

void lsst::jointcal::GtransfoIdentity::dump ( std::ostream &  stream = std::cout) const
inlinevirtual

dumps the transfo coefficients to stream.

Implements lsst::jointcal::Gtransfo.

Definition at line 161 of file Gtransfo.h.

double lsst::jointcal::GtransfoIdentity::fit ( const StarMatchList starMatchList)
inlinevirtual

fits a transfo to a std::list of Point pairs (p1,p2, the Point fields in StarMatch).

After the fit this(p1) yields approximately p2. The returned value is the sum of squared residuals. If you want to fit a partial transfo (e.g. such that this(T1(p1)) = T2(p2), use StarMatchList::applyTransfo beforehand.

Implements lsst::jointcal::Gtransfo.

Definition at line 155 of file Gtransfo.h.

int lsst::jointcal::GtransfoIdentity::getNpar ( ) const
inlinevirtual

returns the number of parameters (to compute chi2's)

Reimplemented from lsst::jointcal::Gtransfo.

Definition at line 163 of file Gtransfo.h.

GtransfoLin lsst::jointcal::GtransfoIdentity::linearApproximation ( const Point where,
const double  step = 0.01 
) const
virtual

linear approximation.

Reimplemented from lsst::jointcal::Gtransfo.

Definition at line 389 of file Gtransfo.cc.

void lsst::jointcal::GtransfoIdentity::read ( std::istream &  s)

Definition at line 396 of file Gtransfo.cc.

std::unique_ptr<Gtransfo> lsst::jointcal::GtransfoIdentity::reduceCompo ( const Gtransfo right) const
inlinevirtual

to be overloaded by derived classes if they can really "reduce" the composition (e.g.

composition of Polynomial can be reduced)

Reimplemented from lsst::jointcal::Gtransfo.

Definition at line 160 of file Gtransfo.h.

void lsst::jointcal::GtransfoIdentity::write ( std::ostream &  s) const
virtual

Reimplemented from lsst::jointcal::Gtransfo.

Definition at line 394 of file Gtransfo.cc.


The documentation for this class was generated from the following files: