Unique identifier for a given LAr voxel. More...
#include <TLorentzVector.h>#include <TVector3.h>#include <vector>#include <functional>#include <iosfwd>Go to the source code of this file.
Classes | |
| class | sim::LArVoxelID |
| class | std::less< sim::LArVoxelID * > |
Namespaces | |
| sim | |
| Code to link reconstructed objects back to the MC truth information. | |
Unique identifier for a given LAr voxel.
This class defines a unique identifier for a given volume element ("voxel") in the LAr volume. It is sortable, can be tested for equality, and is persistent under ROOT I/O.
(Actually, the term "voxel" is a mis-nomer, since we're also keeping track of the time slice. What's a four-dimensional volume element? A "tesseract element" or "tessel"?)
A LArVoxelID is created by supplying the (x,y,z,t) co-ordinates, which can be in the form of a TLorentzVector:
sim::LArVoxelID id(1,2,3,4); TLorentzVector v(1,2,3,4); sim::LArVoxelID otherID(v);
There are several ways to "get" at the contents of a LArVoxelID:
sim::LArVoxelID id; double x = id.X(); // axis-by-axis int xBinNumber = id.XBin(); // bin number; might be useful for debugging TLorentzVector pos(id); // convert to TLorentzVector
Note that the first and third methods above both return the bin-center value(s).
If you need to know the sizes of the bins (voxels), see LArVoxelCalculator.
Output methods are implemented so this class can be a good "citizen":
sim::LArVoxelID voxelID; std::cout << voxelID << std::endl; // C++ ostream method
Definition in file LArVoxelID.h.
1.8.11