CbmLitMath.h

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/* Copyright (C) 2008-2012 GSI/JINR-LIT, Darmstadt/Dubna
   SPDX-License-Identifier: GPL-3.0-only
   Authors: Andrey Lebedev [committer] */
 
#ifndef CBMLITMATH_H_
#define CBMLITMATH_H_
 
#include "data/CbmLitTrackParam.h"
 
class CbmLitHit;
class CbmLitStripHit;
class CbmLitPixelHit;
class CbmLitTrack;
 
namespace lit
{
 
  /* Calculates chi square
 * @param par Pointer to the updated or smoothed track parameter
 * @param hit Pointer to the hit
 * @return chi square contribution for this hit */
  litfloat ChiSq(const CbmLitTrackParam* par, const CbmLitHit* hit);
 
  /* Calculates chi square for strip hits
 * @param par Pointer to the updated or smoothed track parameter
 * @param hit Pointer to the strip hit
 * @return chi square contribution for this strip hit */
  litfloat ChiSq(const CbmLitTrackParam* par, const CbmLitStripHit* hit);
 
  /* Calculates chi square for pixel hits
 * @param par Pointer to the updated or smoothed track parameter
 * @param hit Pointer to the pixel hit
 * @return chi square contribution for this pixel hit */
  litfloat ChiSq(const CbmLitTrackParam* par, const CbmLitPixelHit* hit);
 
  /* Calculates number of degrees of freedom
 * @param track Pointer to the track */
  int NDF(const CbmLitTrack* track);
 
}  // namespace lit
#endif /*CBMLITMATH_H_*/