ITS: Vertexer remove unused code (#14508)

Signed-off-by: Felix Schlepper <felix.schlepper@cern.ch>

Author: f3sch

Detectors/ITSMFT/ITS/tracking/include/ITStracking/VertexerTraits.h

@@ -73,24 +73,10 @@ class VertexerTraits
   virtual void computeVertices(const int iteration = 0);
   virtual void adoptTimeFrame(TimeFrame7* tf) noexcept { mTimeFrame = tf; }
   virtual void updateVertexingParameters(const std::vector<VertexingParameters>& vrtPar, const TimeFrameGPUParameters& gpuTfPar);
+
   // truth tracking
   void addTruthSeedingVertices();
 
-  void computeVerticesInRof(int,
-                            gsl::span<const o2::its::Line>&,
-                            bounded_vector<bool>&,
-                            bounded_vector<o2::its::ClusterLines>&,
-                            std::array<float, 2>&,
-                            bounded_vector<Vertex>&,
-                            bounded_vector<int>&,
-                            TimeFrame7*,
-                            bounded_vector<o2::MCCompLabel>*,
-                            const int iteration = 0);
-
-  bounded_vector<std::pair<int, int>> selectClusters(const int* indexTable,
-                                                     const std::array<int, 4>& selectedBinsRect,
-                                                     const IndexTableUtils& utils);
-
   // utils
   auto& getVertexingParameters() { return mVrtParams; }
   auto getVertexingParameters() const { return mVrtParams; }

Detectors/ITSMFT/ITS/tracking/src/VertexerTraits.cxx

@@ -144,26 +144,6 @@ void trackletSelectionKernelHost(
   }
 }
 
-bounded_vector<std::pair<int, int>> VertexerTraits::selectClusters(const int* indexTable,
-                                                                   const std::array<int, 4>& selectedBinsRect,
-                                                                   const IndexTableUtils& utils)
-{
-  bounded_vector<std::pair<int, int>> filteredBins{mMemoryPool.get()};
-  int phiBinsNum{selectedBinsRect[3] - selectedBinsRect[1] + 1};
-  if (phiBinsNum < 0) {
-    phiBinsNum += utils.getNphiBins();
-  }
-  filteredBins.reserve(phiBinsNum);
-  for (int iPhiBin{selectedBinsRect[1]}, iPhiCount{0}; iPhiCount < phiBinsNum;
-       iPhiBin = ++iPhiBin == utils.getNphiBins() ? 0 : iPhiBin, iPhiCount++) {
-    const int firstBinIndex{utils.getBinIndex(selectedBinsRect[0], iPhiBin)};
-    filteredBins.emplace_back(
-      indexTable[firstBinIndex],
-      utils.countRowSelectedBins(indexTable, iPhiBin, selectedBinsRect[0], selectedBinsRect[2]));
-  }
-  return filteredBins;
-}
-
 void VertexerTraits::updateVertexingParameters(const std::vector<VertexingParameters>& vrtPar, const TimeFrameGPUParameters& tfPar)
 {
   mVrtParams = vrtPar;
@@ -575,127 +555,6 @@ void VertexerTraits::computeVertices(const int iteration)
 #endif
 }
 
-void VertexerTraits::computeVerticesInRof(int rofId,
-                                          gsl::span<const o2::its::Line>& lines,
-                                          bounded_vector<bool>& usedLines,
-                                          bounded_vector<o2::its::ClusterLines>& clusterLines,
-                                          std::array<float, 2>& beamPosXY,
-                                          bounded_vector<Vertex>& vertices,
-                                          bounded_vector<int>& verticesInRof,
-                                          TimeFrame7* tf,
-                                          bounded_vector<o2::MCCompLabel>* labels,
-                                          const int iteration)
-{
-  int foundVertices{0};
-  auto nsigmaCut{std::min(mVrtParams[iteration].vertNsigmaCut * mVrtParams[iteration].vertNsigmaCut * (mVrtParams[iteration].vertRadiusSigma * mVrtParams[iteration].vertRadiusSigma + mVrtParams[iteration].trackletSigma * mVrtParams[iteration].trackletSigma), 1.98f)};
-  const int numTracklets{static_cast<int>(lines.size())};
-  for (int line1{0}; line1 < numTracklets; ++line1) {
-    if (usedLines[line1]) {
-      continue;
-    }
-    for (int line2{line1 + 1}; line2 < numTracklets; ++line2) {
-      if (usedLines[line2]) {
-        continue;
-      }
-      auto dca{Line::getDCA(lines[line1], lines[line2])};
-      if (dca < mVrtParams[iteration].pairCut) {
-        clusterLines.emplace_back(line1, lines[line1], line2, lines[line2]);
-        std::array<float, 3> tmpVertex{clusterLines.back().getVertex()};
-        if (tmpVertex[0] * tmpVertex[0] + tmpVertex[1] * tmpVertex[1] > 4.f) {
-          clusterLines.pop_back();
-          break;
-        }
-        usedLines[line1] = true;
-        usedLines[line2] = true;
-        for (int tracklet3{0}; tracklet3 < numTracklets; ++tracklet3) {
-          if (usedLines[tracklet3]) {
-            continue;
-          }
-          if (Line::getDistanceFromPoint(lines[tracklet3], tmpVertex) < mVrtParams[iteration].pairCut) {
-            clusterLines.back().add(tracklet3, lines[tracklet3]);
-            usedLines[tracklet3] = true;
-            tmpVertex = clusterLines.back().getVertex();
-          }
-        }
-        break;
-      }
-    }
-  }
-
-  if (mVrtParams[iteration].allowSingleContribClusters) {
-    auto beamLine = Line{{tf->getBeamX(), tf->getBeamY(), -50.f}, {tf->getBeamX(), tf->getBeamY(), 50.f}}; // use beam position as contributor
-    for (size_t iLine{0}; iLine < numTracklets; ++iLine) {
-      if (!usedLines[iLine]) {
-        auto dca = Line::getDCA(lines[iLine], beamLine);
-        if (dca < mVrtParams[iteration].pairCut) {
-          clusterLines.emplace_back(iLine, lines[iLine], -1, beamLine); // beamline must be passed as second line argument
-        }
-      }
-    }
-  }
-
-  // Cluster merging
-  std::sort(clusterLines.begin(), clusterLines.end(), [](ClusterLines& cluster1, ClusterLines& cluster2) { return cluster1.getSize() > cluster2.getSize(); });
-  size_t nClusters{clusterLines.size()};
-  for (int iCluster1{0}; iCluster1 < nClusters; ++iCluster1) {
-    std::array<float, 3> vertex1{clusterLines[iCluster1].getVertex()};
-    std::array<float, 3> vertex2{};
-    for (int iCluster2{iCluster1 + 1}; iCluster2 < nClusters; ++iCluster2) {
-      vertex2 = clusterLines[iCluster2].getVertex();
-      if (o2::gpu::GPUCommonMath::Abs(vertex1[2] - vertex2[2]) < mVrtParams[iteration].clusterCut) {
-        float distance{(vertex1[0] - vertex2[0]) * (vertex1[0] - vertex2[0]) +
-                       (vertex1[1] - vertex2[1]) * (vertex1[1] - vertex2[1]) +
-                       (vertex1[2] - vertex2[2]) * (vertex1[2] - vertex2[2])};
-        if (distance < mVrtParams[iteration].pairCut * mVrtParams[iteration].pairCut) {
-          for (auto label : clusterLines[iCluster2].getLabels()) {
-            clusterLines[iCluster1].add(label, lines[label]);
-            vertex1 = clusterLines[iCluster1].getVertex();
-          }
-          clusterLines.erase(clusterLines.begin() + iCluster2);
-          --iCluster2;
-          --nClusters;
-        }
-      }
-    }
-  }
-
-  std::sort(clusterLines.begin(), clusterLines.end(),
-            [](ClusterLines& cluster1, ClusterLines& cluster2) { return cluster1.getSize() > cluster2.getSize(); }); // ensure clusters are ordered by contributors, so that we can cut after the first.
-  bool atLeastOneFound{false};
-  for (int iCluster{0}; iCluster < nClusters; ++iCluster) {
-    bool lowMultCandidate{false};
-    double beamDistance2{(tf->getBeamX() - clusterLines[iCluster].getVertex()[0]) * (tf->getBeamX() - clusterLines[iCluster].getVertex()[0]) +
-                         (tf->getBeamY() - clusterLines[iCluster].getVertex()[1]) * (tf->getBeamY() - clusterLines[iCluster].getVertex()[1])};
-
-    if (atLeastOneFound && (lowMultCandidate = clusterLines[iCluster].getSize() < mVrtParams[iteration].clusterContributorsCut)) { // We might have pile up with nContr > cut.
-      lowMultCandidate &= (beamDistance2 < mVrtParams[iteration].lowMultBeamDistCut * mVrtParams[iteration].lowMultBeamDistCut);
-      if (!lowMultCandidate) { // Not the first cluster and not a low multiplicity candidate, we can remove it
-        clusterLines.erase(clusterLines.begin() + iCluster);
-        nClusters--;
-        continue;
-      }
-    }
-    if (beamDistance2 < nsigmaCut && o2::gpu::GPUCommonMath::Abs(clusterLines[iCluster].getVertex()[2]) < mVrtParams[iteration].maxZPositionAllowed) {
-      atLeastOneFound = true;
-      ++foundVertices;
-      vertices.emplace_back(o2::math_utils::Point3D<float>(clusterLines[iCluster].getVertex()[0],
-                                                           clusterLines[iCluster].getVertex()[1],
-                                                           clusterLines[iCluster].getVertex()[2]),
-                            clusterLines[iCluster].getRMS2(),          // Symm matrix. Diagonal: RMS2 components,
-                                                                       // off-diagonal: square mean of projections on planes.
-                            clusterLines[iCluster].getSize(),          // Contributors
-                            clusterLines[iCluster].getAvgDistance2()); // In place of chi2
-      vertices.back().setTimeStamp(clusterLines[iCluster].getROF());
-      if (labels) {
-        for (auto& index : clusterLines[iCluster].getLabels()) {
-          labels->push_back(tf->getLinesLabel(rofId)[index]); // then we can use nContributors from vertices to get the labels
-        }
-      }
-    }
-  }
-  verticesInRof.push_back(foundVertices);
-}
-
 void VertexerTraits::addTruthSeedingVertices()
 {
   LOGP(info, "Using truth seeds as vertices; will skip computations");