GeneralBrokenLines  V02-02-01
using EIGEN
Functions
example1.cpp File Reference
#include <time.h>
#include "exampleUtil.h"
#include "GblTrajectory.h"

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Functions

void example1 ()
 

Detailed Description

Example application.

Author
Claus Kleinwort, DESY, 2011 (Claus.nosp@m..Kle.nosp@m.inwor.nosp@m.t@de.nosp@m.sy.de)

Definition in file example1.cpp.

Function Documentation

◆ example1()

void example1 ( )

Simple technical example (curvilinear as local system).

Create points on initial trajectory, create trajectory from points, fit and write trajectory to MP-II binary file, get track parameter corrections and covariance matrix at points.

Equidistant measurement layers and thin scatterers, propagation with simple jacobian (quadratic in arc length differences). Curvilinear system (U,V,T) as local coordinate system.

This example simulates and refits tracks in a system of planar detectors with 2D measurements in a constant magnet field in Z direction using the curvilinear system as local system and (Q/P, slopes, offsets) as local track parameters. The true track parameters are randomly smeared with respect to a (constant and straight) reference trajectory with direction (lambda, phi) and are used (only) for the on-the-fly simulation of the measurements and scatterers. The predictions from the reference trajectory are therefore always zero and the residuals needed (by addMeasurement) are equal to the measurements.

Definition at line 37 of file example1.cpp.

References gbl::GblPoint::addMeasurement(), gbl::GblPoint::addScatterer(), gbl::GblTrajectory::fit(), gbl::gblSimpleJacobian(), and gbl::unrm().

Referenced by main().