Skip to content

Update Pvertexer for ALICE3 purposes #5359

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Closed
njacazio wants to merge 1 commit into from
Closed

Update Pvertexer for ALICE3 purposes #5359

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
15 changes: 11 additions & 4 deletions Detectors/Vertexing/include/DetectorsVertexing/PVertexer.h
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -56,6 +56,11 @@ class PVertexer

int process(gsl::span<const o2d::TrackTPCITS> tracksITSTPC, gsl::span<const o2::ft0::RecPoints> ft0Data,
std::vector<PVertex>& vertices, std::vector<o2d::VtxTrackIndex>& vertexTrackIDs, std::vector<V2TRef>& v2tRefs);
/// Process function specific for ALICE3
int process(gsl::span<const o2::track::TrackParCov> tracks,
std::vector<PVertex>& vertices,
std::vector<o2d::VtxTrackIndex>& vertexTrackIDs,
std::vector<V2TRef>& v2tRefs);

static void createMCLabels(gsl::span<const o2::MCCompLabel> lblITS, gsl::span<const o2::MCCompLabel> lblTPC,
const std::vector<PVertex> vertices, const std::vector<o2d::VtxTrackIndex> vertexTrackIDs, const std::vector<V2TRef> v2tRefs,
Expand Down Expand Up @@ -107,6 +112,8 @@ class PVertexer
void applyConstraint(VertexSeed& vtxSeed) const;
bool upscaleSigma(VertexSeed& vtxSeed) const;
void createTracksPool(gsl::span<const o2d::TrackTPCITS> tracksITSTPC);
/// Function specific for ALICE3
void createTracksPool(gsl::span<const o2::track::TrackParCov> tracks);
int findVertices(const VertexingInput& input, std::vector<PVertex>& vertices, std::vector<GTrackID>& vertexTrackIDs, std::vector<V2TRef>& v2tRefs);
std::pair<int, int> getBestFT0Trigger(const PVertex& vtx, gsl::span<const o2::ft0::RecPoints> ft0Data, int& currEntry) const;

Expand All @@ -121,13 +128,13 @@ class PVertexer
//
o2::math_utils::StatAccumulator mStatZErr;
o2::math_utils::StatAccumulator mStatTErr;
std::vector<TrackVF> mTracksPool; ///< tracks in internal representation used for vertexing
std::vector<int> mSortedTrackID; ///< indices of tracks sorted in time
std::vector<TrackVF> mTracksPool; ///< tracks in internal representation used for vertexing
std::vector<int> mSortedTrackID; ///< indices of tracks sorted in time
std::vector<TimeZCluster> mTimeZClusters; ///< set of time clusters
std::vector<int> mClusterTrackIDs; ///< IDs of tracks making the clusters

float mBz = 0.; ///< mag.field at beam line
bool mValidateWithFT0 = false; ///< require vertex validation with FT0 (if available)
float mBz = 0.; ///< mag.field at beam line
bool mValidateWithFT0 = false; ///< require vertex validation with FT0 (if available)

o2::InteractionRecord mStartIR{0, 0}; ///< IR corresponding to the start of the TF

Expand Down
106 changes: 105 additions & 1 deletion Detectors/Vertexing/src/PVertexer.cxx
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -27,6 +27,64 @@ constexpr float PVertexer::kAlmost0F;
constexpr double PVertexer::kAlmost0D;
constexpr float PVertexer::kHugeF;

//___________________________________________________________________
int PVertexer::process(gsl::span<const o2::track::TrackParCov> tracks,
std::vector<PVertex>& vertices,
std::vector<o2d::VtxTrackIndex>& vertexTrackIDs,
std::vector<V2TRef>& v2tRefs)
{
Printf("Processing the vertexing on ALICE3");
createTracksPool(tracks);
dbscan_clusterize();

std::vector<PVertex> verticesLoc;
std::vector<GTrackID> vertexTrackIDsLoc;
std::vector<V2TRef> v2tRefsLoc;
std::vector<float> validationTimes;

for (auto tc : mTimeZClusters) {
VertexingInput inp;
// inp.idRange = gsl::span<int>((int*)&mSortedTrackID[tc.first], tc.count);
inp.idRange = gsl::span<int>((int*)&mClusterTrackIDs[tc.first], tc.count);
inp.scaleSigma2 = 3. * estimateScale2();
inp.timeEst = tc.timeEst;
findVertices(inp, verticesLoc, vertexTrackIDsLoc, v2tRefsLoc);
}

// sort in time
std::vector<int> vtTimeSortID(verticesLoc.size());
std::iota(vtTimeSortID.begin(), vtTimeSortID.end(), 0);
std::sort(vtTimeSortID.begin(), vtTimeSortID.end(), [&verticesLoc](int i, int j) {
return verticesLoc[i].getTimeStamp().getTimeStamp() < verticesLoc[j].getTimeStamp().getTimeStamp();
});

vertices.clear();
v2tRefs.clear();
vertexTrackIDs.clear();
vertices.reserve(verticesLoc.size());
v2tRefs.reserve(v2tRefsLoc.size());
vertexTrackIDs.reserve(vertexTrackIDsLoc.size());

int trCopied = 0, count = 0, vtimeID = 0;
for (auto i : vtTimeSortID) {
auto& vtx = verticesLoc[i];

bool irSet = setCompatibleIR(vtx);
if (!irSet) {
continue;
}
vertices.push_back(vtx);
int it = v2tRefsLoc[i].getFirstEntry(), itEnd = it + v2tRefsLoc[i].getEntries(), dest0 = vertexTrackIDs.size();
for (; it < itEnd; it++) {
auto& gid = vertexTrackIDs.emplace_back(vertexTrackIDsLoc[it]);
gid.setPVContributor();
}
v2tRefs.emplace_back(dest0, v2tRefsLoc[i].getEntries());
LOG(DEBUG) << "#" << count++ << " " << vertices.back() << " | " << v2tRefs.back().getEntries() << " indices from " << v2tRefs.back().getFirstEntry(); // RS REM
}

return vertices.size();
}
//___________________________________________________________________
int PVertexer::process(gsl::span<const o2d::TrackTPCITS> tracksITSTPC, gsl::span<const o2::ft0::RecPoints> ft0Data,
std::vector<PVertex>& vertices, std::vector<GIndex>& vertexTrackIDs, std::vector<V2TRef>& v2tRefs)
Expand Down Expand Up @@ -468,7 +526,7 @@ void PVertexer::createTracksPool(gsl::span<const o2d::TrackTPCITS> tracksITSTPC)
mTracksPool.reserve(ntGlo);
// check all containers
float vtxErr2 = 0.5 * (mMeanVertex.getSigmaX2() + mMeanVertex.getSigmaY2());
float pullIniCut = 9.; // RS FIXME pullIniCut should be a parameter
float pullIniCut = 9.; // RS FIXME pullIniCut should be a parameter
o2d::DCA dca;

for (uint32_t i = 0; i < ntGlo; i++) {
Expand Down Expand Up @@ -501,6 +559,52 @@ void PVertexer::createTracksPool(gsl::span<const o2d::TrackTPCITS> tracksITSTPC)
auto tMax = mTracksPool[mSortedTrackID.back()].timeEst.getTimeStamp();
}

//___________________________________________________________________
void PVertexer::createTracksPool(gsl::span<const o2::track::TrackParCov> tracks)
{
Printf("Creating a pool of tracks for ALICE3!");
// create pull of all candidate tracks in a global array ordered in time
mTracksPool.clear();
mSortedTrackID.clear();

auto ntGlo = tracks.size();
mTracksPool.reserve(ntGlo);
// check all containers
float vtxErr2 = 0.5 * (mMeanVertex.getSigmaX2() + mMeanVertex.getSigmaY2());
float pullIniCut = 9.; // RS FIXME pullIniCut should be a parameter
o2d::DCA dca;

for (uint32_t i = 0; i < ntGlo; i++) {
o2::track::TrackParCov trc = tracks[i];
if (!trc.propagateToDCA(mMeanVertex, mBz, &dca, mPVParams->dcaTolerance) ||
dca.getY() * dca.getY() / (dca.getSigmaY2() + vtxErr2) > mPVParams->pullIniCut) {
continue;
}
auto& tvf = mTracksPool.emplace_back(trc, TimeEst{0.f, 1.f}, GTrackID{i, o2::dataformats::GlobalTrackID::ITS});
mStatZErr.add(std::sqrt(trc.getSigmaZ2()));
mStatTErr.add(tvf.timeEst.getTimeStampError());
}
// TODO: try to narrow timestamps using tof times
auto [zerrMean, zerrRMS] = mStatZErr.getMeanRMS2<float>();

auto [terrMean, terrRMS] = mStatTErr.getMeanRMS2<float>();

if (mTracksPool.empty()) {
Printf("Empty pool!");
return;
}
//
mSortedTrackID.resize(mTracksPool.size());
std::iota(mSortedTrackID.begin(), mSortedTrackID.end(), 0);

std::sort(mSortedTrackID.begin(), mSortedTrackID.end(), [this](int i, int j) {
return this->mTracksPool[i].timeEst.getTimeStamp() < this->mTracksPool[j].timeEst.getTimeStamp();
});

auto tMin = mTracksPool[mSortedTrackID.front()].timeEst.getTimeStamp();
auto tMax = mTracksPool[mSortedTrackID.back()].timeEst.getTimeStamp();
}

//___________________________________________________________________
void PVertexer::createMCLabels(gsl::span<const o2::MCCompLabel> lblITS, gsl::span<const o2::MCCompLabel> lblTPC,
const std::vector<PVertex> vertices, const std::vector<o2::dataformats::VtxTrackIndex> vertexTrackIDs, const std::vector<V2TRef> v2tRefs,
Expand Down