ATLAS Offline Software
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This package contains code to generate the tables of element extents used by the region selector.
The code loops over each detector element and fills the class RegSelSiLUT which includes for each element:
z min, z max, z2 min z2 max
r min, r max,
phi min, phi max,
layer/disk number, barrel or endcap, hash Id, rob Id.
The element extent in eta is no longer used, since the lookup tables are more sophisticated and can allow elements within an roi which has a position and and extent in z along the beamline to be used.
Therefore, when a user wants elements inside an roi, they must also specify the zmin and zmax positions of the roi along the beamline. The default z range (DeltaZ in the old version) are no longer used - this now comes from each RoiDescriptor
The elements can be trapezoidal in r-z space, with max and min radii, and max and min z positions at the inner radius and z2 max and min positions at the outer radius. If no z2 values are given, then the same z limits are used at both the inner and outer radius.
The package contains no tool: