SymmetricLayerFinder Class Reference

#include <SymmetricLayerFinder.h>

Public Member Functions
FDLC	mirror (const FDLC &input)
const ForwardDetLayer *	mirror (const ForwardDetLayer *layer)
	SymmetricLayerFinder (const FDLC &)

Private Types
typedef FDLC::const_iterator	ConstFDLI
typedef std::vector< const ForwardDetLayer * >	FDLC
typedef FDLC::iterator	FDLI
typedef std::map< const ForwardDetLayer *, const ForwardDetLayer *, std::less< const ForwardDetLayer * > >	ForwardMapType
typedef std::pair< const ForwardDetLayer *, const ForwardDetLayer * >	PairType

Private Member Functions
const ForwardDetLayer *	mirrorPartner (const ForwardDetLayer *layer, const FDLC &rightLayers)

Private Attributes
ForwardMapType	theForwardMap

Detailed Description

A symmetrisation algorithm for layer navigation. For every ForwardDetLayer returns a pointer to the symmetric one with respect to origin.

Definition at line 17 of file SymmetricLayerFinder.h.

Member Typedef Documentation

ConstFDLI

typedef FDLC::const_iterator SymmetricLayerFinder::ConstFDLI

private

Definition at line 20 of file SymmetricLayerFinder.h.

FDLC

typedef std::vector<const ForwardDetLayer*> SymmetricLayerFinder::FDLC

private

Definition at line 18 of file SymmetricLayerFinder.h.

FDLI

typedef FDLC::iterator SymmetricLayerFinder::FDLI

private

Definition at line 19 of file SymmetricLayerFinder.h.

ForwardMapType

typedef std::map<const ForwardDetLayer*, const ForwardDetLayer*, std::less<const ForwardDetLayer*> > SymmetricLayerFinder::ForwardMapType

private

Definition at line 32 of file SymmetricLayerFinder.h.

PairType

typedef std::pair<const ForwardDetLayer*, const ForwardDetLayer*> SymmetricLayerFinder::PairType

private

Definition at line 21 of file SymmetricLayerFinder.h.

Constructor & Destructor Documentation

SymmetricLayerFinder()

SymmetricLayerFinder::SymmetricLayerFinder

(

const FDLC &

flc

)

Definition at line 12 of file SymmetricLayerFinder.cc.

                                                          {
  ConstFDLI middle =
      find_if(flc.begin(), flc.end(), [](const GeometricSearchDet* a) { return a->position().z() >= 0.0; });
 
  FDLC leftLayers = FDLC(flc.begin(), middle);
  FDLC rightLayers = FDLC(middle, flc.end());
  vector<PairType> foundPairs;
 
  for (FDLI i = leftLayers.begin(); i != leftLayers.end(); i++) {
    const ForwardDetLayer* partner = mirrorPartner(*i, rightLayers);
    //if ( partner == 0) throw DetLogicError("Assymmetric forward layers in Tracker");
    if (partner == nullptr)
      throw cms::Exception("SymmetricLayerFinder", "Assymmetric forward layers in Tracker");
 
    foundPairs.push_back(make_pair(*i, partner));
  }
 
  // fill the map
  for (vector<PairType>::iterator ipair = foundPairs.begin(); ipair != foundPairs.end(); ipair++) {
    theForwardMap[ipair->first] = ipair->second;
    theForwardMap[ipair->second] = ipair->first;
  }
}

References a, Exception, and mps_fire::i.

Member Function Documentation

mirror() [1/2]

SymmetricLayerFinder::FDLC SymmetricLayerFinder::mirror

(

const FDLC &

input

)

Definition at line 52 of file SymmetricLayerFinder.cc.

                                                                       {
  FDLC result;
  for (ConstFDLI i = input.begin(); i != input.end(); i++) {
    result.push_back(mirror(*i));
  }
  return result;
}

References mps_fire::i, input, EmbeddingLHEProducer_cfi::mirror, and mps_fire::result.

mirror() [2/2]

const ForwardDetLayer* SymmetricLayerFinder::mirror ( const ForwardDetLayer *  layer )

inline

Definition at line 26 of file SymmetricLayerFinder.h.

{ return theForwardMap[layer]; }

References phase1PixelTopology::layer.

Referenced by CosmicNavigationSchool::buildAdditionalForwardLinks(), SimpleNavigationSchool::linkBarrelLayers(), CosmicNavigationSchool::linkBarrelLayers(), SimpleNavigationSchool::linkForwardLayers(), and BeamHaloNavigationSchool::linkOtherEndLayers().

mirrorPartner()

const ForwardDetLayer * SymmetricLayerFinder::mirrorPartner ( const ForwardDetLayer *  layer, const FDLC &  rightLayers  )

private

Definition at line 36 of file SymmetricLayerFinder.cc.

                                                                                                                {
  auto mirrorImage = [=](const ForwardDetLayer* a) -> bool {
    auto zdiff = a->position().z() + layer->position().z();
    auto rdiff = a->specificSurface().innerRadius() - layer->specificSurface().innerRadius();
 
    // equality based on z position and inner radius
    return std::abs(zdiff) < 2.f && std::abs(rdiff) < 1.f;  // units are cm
  };
 
  ConstFDLI result = find_if(rightLayers.begin(), rightLayers.end(), mirrorImage);
  if (result == rightLayers.end())
    return nullptr;
  else
    return *result;
}

References a, funct::abs(), phase1PixelTopology::layer, and mps_fire::result.

Member Data Documentation

theForwardMap

ForwardMapType SymmetricLayerFinder::theForwardMap

private

Definition at line 34 of file SymmetricLayerFinder.h.