GPUTPCBaseTrackParam.h

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// Copyright 2019-2020 CERN and copyright holders of ALICE O2.
// See https://alice-o2.web.cern.ch/copyright for details of the copyright holders.
// All rights not expressly granted are reserved.
//
// This software is distributed under the terms of the GNU General Public
// License v3 (GPL Version 3), copied verbatim in the file "COPYING".
//
// In applying this license CERN does not waive the privileges and immunities
// granted to it by virtue of its status as an Intergovernmental Organization
// or submit itself to any jurisdiction.
 
 
#ifndef GPUTPCBASETRACKPARAM_H
#define GPUTPCBASETRACKPARAM_H
 
#include "GPUTPCDef.h"
 
namespace o2::gpu
{
class GPUTPCTrackParam;
 
struct GPUTPCBaseTrackParam {
  GPUd() float X() const { return mX; }
  GPUd() float Y() const { return mP[0]; }
  GPUd() float Z() const { return mP[1]; }
  GPUd() float SinPhi() const { return mP[2]; }
  GPUd() float DzDs() const { return mP[3]; }
  GPUd() float QPt() const { return mP[4]; }
  GPUd() float ZOffset() const { return mZOffset; }
 
  GPUd() float Err2Y() const { return mC[0]; }
  GPUd() float Err2Z() const { return mC[2]; }
  GPUd() float Err2SinPhi() const { return mC[5]; }
  GPUd() float Err2DzDs() const { return mC[9]; }
  GPUd() float Err2QPt() const { return mC[14]; }
  GPUhd() const float* Cov() const { return mC; }
  GPUd() float GetCov(int32_t i) const { return mC[i]; }
  GPUhd() void SetCov(int32_t i, float v) { mC[i] = v; }
 
  GPUhd() float GetX() const { return mX; }
  GPUhd() float GetY() const { return mP[0]; }
  GPUhd() float GetZ() const { return mP[1]; }
  GPUhd() float GetSinPhi() const { return mP[2]; }
  GPUhd() float GetDzDs() const { return mP[3]; }
  GPUhd() float GetQPt() const { return mP[4]; }
  GPUhd() float GetZOffset() const { return mZOffset; }
 
  GPUd() float GetKappa(float Bz) const { return -mP[4] * Bz; }
 
  GPUhd() const float* Par() const { return mP; }
  GPUd() const float* GetPar() const { return mP; }
  GPUd() float GetPar(int32_t i) const { return (mP[i]); }
 
  GPUhd() void SetPar(int32_t i, float v) { mP[i] = v; }
 
  GPUd() void SetX(float v) { mX = v; }
  GPUd() void SetY(float v) { mP[0] = v; }
  GPUd() void SetZ(float v) { mP[1] = v; }
  GPUd() void SetSinPhi(float v) { mP[2] = v; }
  GPUd() void SetDzDs(float v) { mP[3] = v; }
  GPUd() void SetQPt(float v) { mP[4] = v; }
  GPUd() void SetZOffset(float v) { mZOffset = v; }
 
  // WARNING, Track Param Data is copied in the GPU Tracklet Constructor element by element instead of using copy constructor!!!
  // This is neccessary for performance reasons!!!
  // Changes to Elements of this class therefore must also be applied to TrackletConstructor!!!
  float mX;       // x position
  float mC[15];   // the covariance matrix for Y,Z,SinPhi,..
  float mZOffset; // z offset
  float mP[5];    // 'active' track parameters: Y, Z, SinPhi, DzDs, q/Pt
};
} // namespace o2::gpu
 
#endif