File DD4hepBinningHelpers.hpp

namespace Acts

Note

This file is foreseen for the Geometry module to replace Extent

Functions

std::vector<Acts::Experimental::ProtoBinning> convertBinning(const dd4hep::DetElement &dd4hepElement, const std::string &bname)

This method converts the DD4hep binning into the Acts ProtoBinning.

Parameters

  • dd4hepElement – the element which has a binning description attached

  • bname – the binning base name, e.g. surface_binning, material_binning

Returns

a vector of proto binning descriptions

void decodeBinning(dd4hep::rec::VariantParameters &variantParams, const xml_comp_t &xmlBinning, const std::string &bname, const std::vector<std::string> &bvals)

Helper method to decode the binning from what would appear in the xml into variant parameters, such that it can be understood in the downstream processing.

This parses the dediced < surface_binning > tag

  • allowed/understood binnings are x,y,z,phi,r

  • allowed/unserstood types are equidistant/variable (those are auto-detected)

Example for e.g. bname = “surface_binning”:

  • Equidistant binning in r and phi: < surface_binning nr=”2” rmin=”25” rmax=”100” nphi=”22” phimin=”-3.1415” phimax=”3.1415” \/ >

  • Variable binning in z: < surface_binning zboundaries=”-100,-90,90,100” \/ >

And 2D combinations of this are allowed.

Parameters

  • variantParams – [in,out] the variant parameters that will be overwritten

  • xmlBinning – the surface binning

  • bname – the binning base name, e.g. surface_binning, material_binning

  • bvals – the boundary values, i.e. x,y,z,phi,r

Variables

static std::vector<std::tuple<std::string, BinningValue>> allowedBinnings = {{"x", binX}, {"y", binY}, {"z", binZ}, {"phi", binPhi}, {"r", binR}}