Class Acts::GaussianGridTrackDensity¶
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template<int mainGridSize = 2000, int trkGridSize = 15>
class Acts::GaussianGridTrackDensity¶ Implements a 1-dim density grid to be filled with track Gaussian distributions.
Each single track is modelled as a 2(!)-dim Gaussian distribution grid in the d0-z0 plane, but only the overlap with the z-axis (i.e. a 1-dim density vector) needs to be calculated. The position of the highest track density (of either a single bin or the sum of a certain region) can be determined. Single tracks can be cached and removed from the overall density.
- tparam mainGridSize
The size of the z-axis 1-dim main density grid
- tparam trkGridSize
The 2(!)-dim grid size of a single track, i.e. a single track is modelled as a (trkGridSize x trkGridSize) grid in the d0-z0 plane. Note: trkGridSize has to be an odd value.
Public Types
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using MainGridVector = Eigen::Matrix<float, mainGridSize, 1>¶
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using TrackGridVector = Eigen::Matrix<float, trkGridSize, 1>¶
Public Functions
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std::pair<int, TrackGridVector> addTrack(const BoundTrackParameters &trk, MainGridVector &mainGrid) const¶
Adds a single track to the overall grid density.
- Parameters
trk – The track to be added
mainGrid – The main 1-dim density grid along the z-axis
- Returns
A pair storing information about the z-bin position the track was added (int) and the 1-dim density contribution of the track itself
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Result<float> getMaxZPosition(MainGridVector &mainGrid) const¶
Returns the z position of maximum track density.
- Parameters
mainGrid – The main 1-dim density grid along the z-axis
- Returns
The z position of maximum track density
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Result<std::pair<float, float>> getMaxZPositionAndWidth(MainGridVector &mainGrid) const¶
Returns the z position of maximum track density and the estimated width.
- Parameters
mainGrid – The main 1-dim density grid along the z-axis
- Returns
The z position of maximum track density and width
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void removeTrackGridFromMainGrid(int zBin, const TrackGridVector &trkGrid, MainGridVector &mainGrid) const¶
Removes a track from the overall grid density.
- Parameters
zBin – The center z-bin position the track needs to be removed from
trkGrid – The 1-dim density contribution of the track
mainGrid – The main 1-dim density grid along the z-axis
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struct Config¶
The configuration struct.
Public Functions
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inline Config(float zMinMax_ = 100)¶
Note
The value of
zMinMax_together withmainGridSizedetermines the overall bin size to be used as seen below- Parameters
zMinMax_ – The minimum and maximum z-values (in mm) that should be covered by the main 1-dim density grid along the z-axis
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inline Config(float zMinMax_ = 100)¶