DetLessZ.h File Reference

#include "TrackingTools/DetLayers/interface/GeometricSearchDet.h"

Go to the source code of this file.

Functions
bool	isDetLessZ (const GeometricSearchDet *a, const GeometricSearchDet *b)

Function Documentation

isDetLessZ()

bool isDetLessZ ( const GeometricSearchDet *  a, const GeometricSearchDet *  b  )

inline

Comparison operator for Dets based on the Z.

Definition at line 9 of file DetLessZ.h.

References a, and b.

Referenced by BeamHaloNavigationSchool::reachableFromHorizontal(), SimpleNavigationSchool::splitForwardLayers(), and TIBLayer::TIBLayer().

                                                                                 {
  // multiply by 1+epsilon to make it numericaly stable
  // the epsilon should depend on the scalar precision,
  // this is just a quick fix!
  if (a->position().z() > 0) {
    return a->position().z() * 1.000001 < b->position().z();
  } else if (b->position().z() < 0) {
    return a->position().z() < b->position().z() * 1.000001;
  } else
    return true;
}