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Tracklet.h
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1// Copyright 2019-2026 CERN and copyright holders of ALICE O2.
2// See https://alice-o2.web.cern.ch/copyright for details of the copyright holders.
3// All rights not expressly granted are reserved.
4//
5// This software is distributed under the terms of the GNU General Public
6// License v3 (GPL Version 3), copied verbatim in the file "COPYING".
7//
8// In applying this license CERN does not waive the privileges and immunities
9// granted to it by virtue of its status as an Intergovernmental Organization
10// or submit itself to any jurisdiction.
15
16#ifndef TRACKINGITS_INCLUDE_TRACKLET_H_
17#define TRACKINGITS_INCLUDE_TRACKLET_H_
18
21#include "ITStracking/Cluster.h"
22#include "MathUtils/Utils.h"
23#include "GPUCommonRtypes.h"
24#include "GPUCommonMath.h"
25#include "GPUCommonDef.h"
26#include "GPUCommonLogger.h"
27
28namespace o2::its
29{
30
31// tracklets are entirely determined by their two cluster idx
32struct Tracklet final {
33 GPUhdDefault() Tracklet() = default;
34 GPUhdi() Tracklet(const int firstClusterOrderingIndex, const int secondClusterOrderingIndex,
36 : firstClusterIndex(firstClusterOrderingIndex),
39 phi(o2::math_utils::fastATan2(firstCluster.yCoordinate - secondCluster.yCoordinate, firstCluster.xCoordinate - secondCluster.xCoordinate)),
40 mTime(t) {}
41
42 GPUhdi() Tracklet(const int idx0, const int idx1, float tanL, float phi, const TimeEstBC& t)
43 : firstClusterIndex(idx0),
47 mTime(t) {}
48 GPUhdi() bool operator<(const Tracklet& o) const noexcept
49 {
50 return (firstClusterIndex != o.firstClusterIndex) ? firstClusterIndex < o.firstClusterIndex : secondClusterIndex < o.secondClusterIndex;
51 }
52 GPUhdi() bool operator==(const Tracklet& o) const noexcept
53 {
54 return firstClusterIndex == o.firstClusterIndex && secondClusterIndex == o.secondClusterIndex;
55 }
56 GPUhdi() bool isCompatible(const Tracklet& o) const { return mTime.isCompatible(o.mTime); }
57 GPUhd() void print() const
58 {
59 LOGP(info, "TRKLT: fClIdx:{} sClIdx:{} ts:{}+/-{} TgL={} Phi={}", firstClusterIndex, secondClusterIndex, mTime.getTimeStamp(), mTime.getTimeStampError(), tanLambda, phi);
60 }
61 GPUhd() auto& getTimeStamp() noexcept { return mTime; }
62 GPUhd() const auto& getTimeStamp() const noexcept { return mTime; }
63
64 int firstClusterIndex{constants::UnusedIndex};
69
71};
72
73} // namespace o2::its
74
75#endif /* TRACKINGITS_INCLUDE_TRACKLET_H_ */
General auxilliary methods.
void print() const
#define GPUhd()
configStandalone Light OpenGL display display_light Apply smoothing to points Enable Z buffer Highlight links Highlight seeds Highlight sector tracks Highlight final tracks Show individual Show related Highlight grid Show only individual collision Color clusters belonging to track objects Set line Enable drawing TPC data Enable drawing TOF data Enable drawing magnetic field Set field line step count Invert colors configStandalone Heavy OpenGL display display_heavy Show tracks with ITS contribution Show tracks with TOF contribution Enable propagation of loopers Show clusters at nominal x of pad row for early transformed data Split CE tracks when they cross the central Mark clusters Mark adjacent clusters Hide rejected tracks Apply filter on tracks to be displayed Separate increase X h configStandalone Camera window renderer OpenGL display display_camera Orient the camera such that the y axis is always upwards Full Screen MultiSample Anti Downsampling Anti Enable Vertical Sync Target frame or if the backend cannot limit to the refresh Use OpenGL indirect draws to reduce number of draw calls Display h configStandalone Vulkan display display_vulkan Have uniform buffers in host accessible device memory h configStandalone Internal display display_internal Number of updates the Qt GUI may send ahead of the last one the display has before it waits for the display Opacity of the console background Number of console lines the history is shortened to this when it reaches twice the size Time in seconds an info message fades out after setInfoTime h OpenGL display display Font size Do not use Freetype for font auto
configStandalone Reconstruction rec_tpc multiplier for the combined cluster track error during track following area in cm for the search of for z only used if decrease removal by when above this local occupancy rowx Shift of TPC revert cluster flag edge bit distance to edge exceeds this ZOffset for secondary multiple of radius max P of electron K BB bands crossing max P of electron p BB bands crossing max P of electron d BB bands crossing max P of electron t BB bands crossing min accepted dEdxMaxTPC of the track Additive extra cluster error for Y2 if edge flag set Additive extra cluster error for Y2 if single set Additive extra cluster error for Y2 if or single set Additive extra cluster error for Z2 if or single set Extra errors to add to track when crossing depending on addErrorsCECrossing Inner portion of y range in sector that is not used in searching for extrapolated track candidates factor2YS for track merging factor2K for track merging Margin in cm of Y position when rejecting edge clusters based on uncorrected track Y Max fraction of shared clusters for tracklet Except pad from cluster finding if total number of charges in a fragment is above this Except pad from cluster finding if number of consecutive charges in a fragment is above this Threshold where a timebin is considered disabling the noisy pad check for that pad Treat signal above this minimum as saturated Smoothing factor for the exponential Highly Ionising Particle tail filter Number of timebins to use for the averaging Add additional custom track errors when crossing relative as fraction of Do N fit passes in final fit of< 0:reject at max -n hits") AddOptionRTC(rejectIFCLowRadiusCluster, uint8_t, 1, "", 0, "Reject clusters that get the IFC mask error during refit") AddOptionRTC(dEdxTruncLow, uint8_t, 2, "", 0, "Low truncation threshold, fraction of 128") AddOptionRTC(dEdxTruncHigh, uint8_t, 77, "", 0, "High truncation threshold, fraction of 128") AddOptionRTC(extrapolationTracking, int8_t, 1, "", 0, "Enable Extrapolation Tracking(prolong tracks to adjacent sectors to find short segments)") AddOptionRTC(disableRefitAttachment, uint8_t, 0, "", 0, "Bitmask to disable certain attachment steps during refit(1:attachment, 2:propagation, 4:loop following, 8:mirroring)") AddOptionRTC(rejectionStrategy, uint8_t, o2::gpu::GPUSettings::RejectionStrategyA, "", 0, "Enable rejection of TPC clusters for compression(0=no, 1=strategy A, 2=strategy B)") AddOptionRTC(mergeLoopersAfterburner, uint8_t, 1, "", 0, "Run afterburner for additional looper merging") AddOptionRTC(compressionTypeMask, uint8_t, o2::gpu::GPUSettings::CompressionFull, "", 0, "TPC Compression mode bits(1=truncate charge/width LSB, 2=differences, 4=track-model)") AddOptionRTC(compressionSortOrder, uint8_t, o2::gpu::GPUSettings::SortTime, "", 0, "Sort order of TPC compression(0=time, 1=pad, 2=Z-time-pad, 3=Z-pad-time, 4=no sorting(use incoming order))") AddOptionRTC(sigBitsCharge, uint8_t, 4, "", 0, "Number of significant bits for TPC cluster charge in compression mode 1") AddOptionRTC(sigBitsWidth, uint8_t, 3, "", 0, "Number of significant bits for TPC cluster width in compression mode 1") AddOptionRTC(dropLoopers, uint8_t, 0, "", 0, "Drop looping tracks starting from second loop") AddOptionRTC(mergerInterpolateErrors, uint8_t, 1, "", 0, "Use interpolation instead of extrapolation for chi2 based cluster rejection") AddOptionRTC(mergerInterpolateRejectAlsoOnCurrentPosition, uint8_t, 1, "", 0, "When using mergerInterpolateErrors, reject based on chi2 twice computed with interpolated and current track position starting from NDF > mergerNonInterpolateRejectMinNDF Merge tracks accross the central electrode Enable PID response Add sub threshold clusters in TPC dEdx computation OR mask of TPC flags that will reject the cluster in alternative dEdx Reject edge clusters based on uncorrected track Y during track fit Increase decrease removal by when on this number of pads from the edge h configStandalone Reconstruction rec_trd Max chi2 for TRD tracklets to be matched to a track Chi2 cut for strict matching mode Number of sigmas for ITS TPC track time error estimate Addition to search road around track prolongation along Y in cm Optimal tracklet rphi resolution in maximum chi2 per attached tracklet for TRD tracks take into account the full likelihood of the slope including exponential tails Tracks with less attached tracklets are discarded after the tracking Post trigger Pile up integration time in BCs fits all iterations but the last one in projections Use material lookup table for TPC refit Apply workarounds to avoid cyclic merge should not be needed tpc dyn configStandalone Processing proc_rtc bool
double radius
typedef void(APIENTRYP PFNGLCULLFACEPROC)(GLenum mode)
constexpr int UnusedIndex
Definition Constants.h:32
constexpr float UnsetValue
Definition Constants.h:33
a couple of static helper functions to create timestamp values for CCDB queries or override obsolete ...
const int const Cluster const Cluster & secondCluster
Definition Tracklet.h:35
const int idx1
Definition Tracklet.h:42
GPUhdi() bool operator<(const Tracklet &o) const noexcept
Definition Tracklet.h:48
const int const Cluster const Cluster const TimeEstBC & t
Definition Tracklet.h:36
const int secondClusterOrderingIndex
Definition Tracklet.h:34
TimeEstBC mTime
Definition Tracklet.h:68
const int float tanL
Definition Tracklet.h:42
GPUhdi() Tracklet(const int firstClusterOrderingIndex
ClassDefNV(Tracklet, 1)
GPUhdDefault() Tracklet()=default
const int const Cluster & firstCluster
Definition Tracklet.h:35
GPUhdi() bool operator
GPUhdi() Tracklet(const int idx0
const int float float phi
Definition Tracklet.h:42