PhotonVisibilityService_service.cc

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// ////////////////////////////////////////////////////////////////////////
//
//  \file PhotonVisibilityService_service.cc
//
////////////////////////////////////////////////////////////////////////
//
//  Ben Jones, MIT 2012
//
//  This service reports the visibility of a particular point in
//  the detector to each OpDet.  This is used by the fast
//  optical simulation and by track-light association algorithms.
//
//  Visibility is defined as the fraction of isotropically produced
//  photons from a detector voxel which are expected to reach the
//  OpDet in question.
//
//  This information is lookup up from a previously generated
//  optical library file, whose path is specified to this service.
//
//  Note that it is important that the voxelization schemes match
//  between the library and the service instance for sensible results.
//

#include "larsim/PhotonPropagation/PhotonVisibilityService.h"

#include "art/Framework/Services/Registry/ServiceDefinitionMacros.h"

DEFINE_ART_SERVICE(phot::PhotonVisibilityService)