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MagGeometry.cc
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MagGeometry.cc
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/*
* See header file for a description of this class.
*
* \author N. Amapane - INFN Torino
*/
#include "MagneticField/VolumeBasedEngine/interface/MagGeometry.h"
#include "MagneticField/VolumeGeometry/interface/MagVolume.h"
#include "MagneticField/VolumeGeometry/interface/MagVolume6Faces.h"
#include "MagneticField/Layers/interface/MagBLayer.h"
#include "MagneticField/Layers/interface/MagESector.h"
#include "Utilities/BinningTools/interface/PeriodicBinFinderInPhi.h"
#include "FWCore/Utilities/interface/isFinite.h"
#include "FWCore/MessageLogger/interface/MessageLogger.h"
#include <iostream>
using namespace std;
using namespace edm;
namespace {
// A thread-local cache is accepted because MagneticField is used by several other ESProducts
// via member variable, MagneticField and the other ESProducts are widely used, and migrating
// all the uses of all those was deemed to have very high cost.
std::atomic<int> instanceCounter(0);
thread_local int localInstance = 0;
thread_local MagVolume const* lastVolume = nullptr;
} // namespace
MagGeometry::MagGeometry(int geomVersion,
const std::vector<MagBLayer*>& tbl,
const std::vector<MagESector*>& tes,
const std::vector<MagVolume6Faces*>& tbv,
const std::vector<MagVolume6Faces*>& tev)
: MagGeometry(geomVersion,
reinterpret_cast<std::vector<MagBLayer const*> const&>(tbl),
reinterpret_cast<std::vector<MagESector const*> const&>(tes),
reinterpret_cast<std::vector<MagVolume6Faces const*> const&>(tbv),
reinterpret_cast<std::vector<MagVolume6Faces const*> const&>(tev)) {}
MagGeometry::MagGeometry(int geomVersion,
const std::vector<MagBLayer const*>& tbl,
const std::vector<MagESector const*>& tes,
const std::vector<MagVolume6Faces const*>& tbv,
const std::vector<MagVolume6Faces const*>& tev)
: me_(++instanceCounter),
theBLayers(tbl),
theESectors(tes),
theBVolumes(tbv),
theEVolumes(tev),
cacheLastVolume(true),
geometryVersion(geomVersion) {
vector<double> rBorders;
for (vector<MagBLayer const*>::const_iterator ilay = theBLayers.begin(); ilay != theBLayers.end(); ++ilay) {
LogTrace("MagGeoBuilder") << " Barrel layer at " << (*ilay)->minR() << endl;
//FIXME assume layers are already sorted in minR
rBorders.push_back((*ilay)->minR() * (*ilay)->minR());
}
theBarrelBinFinder = new MagBinFinders::GeneralBinFinderInR<double>(rBorders);
#ifdef EDM_ML_DEBUG
for (vector<MagESector const*>::const_iterator isec = theESectors.begin(); isec != theESectors.end(); ++isec) {
LogTrace("MagGeoBuilder") << " Endcap sector at " << (*isec)->minPhi() << endl;
}
#endif
//FIXME assume sectors are already sorted in phi
//FIXME: PeriodicBinFinderInPhi gets *center* of first bin
int nEBins = theESectors.size();
if (nEBins > 0)
theEndcapBinFinder = new PeriodicBinFinderInPhi<float>(theESectors.front()->minPhi() + Geom::pi() / nEBins, nEBins);
// Compute barrel dimensions based on geometry version
// FIXME: it would be nice to derive these from the actual geometry in the builder, possibly adding some specification to the geometry.
switch (geomVersion >= 120812 ? 0 : (geomVersion >= 90812 ? 1 : 2)) {
case 0: // since 120812
theBarrelRsq1 = 172.400 * 172.400;
theBarrelRsq2 = 308.735 * 308.735;
theBarrelZ0 = 350.000;
theBarrelZ1 = 633.290;
theBarrelZ2 = 662.010;
break;
case 1: // version 90812 (no longer in use)
theBarrelRsq1 = 172.400 * 172.400;
theBarrelRsq2 = 308.755 * 308.755;
theBarrelZ0 = 350.000;
theBarrelZ1 = 633.890;
theBarrelZ2 = 662.010;
break;
case 2: // versions 71212, 90322
theBarrelRsq1 = 172.400 * 172.400;
theBarrelRsq2 = 308.755 * 308.755;
theBarrelZ0 = 350.000;
theBarrelZ1 = 633.290;
theBarrelZ2 = 661.010;
break;
}
LogTrace("MagGeometry_cache") << "*** In MagGeometry ctor: me_=" << me_ << " instanceCounter=" << instanceCounter
<< endl;
}
MagGeometry::~MagGeometry() {
if (theBarrelBinFinder != nullptr)
delete theBarrelBinFinder;
if (theEndcapBinFinder != nullptr)
delete theEndcapBinFinder;
for (vector<MagBLayer const*>::const_iterator ilay = theBLayers.begin(); ilay != theBLayers.end(); ++ilay) {
delete (*ilay);
}
for (vector<MagESector const*>::const_iterator ilay = theESectors.begin(); ilay != theESectors.end(); ++ilay) {
delete (*ilay);
}
}
// Return field vector at the specified global point
GlobalVector MagGeometry::fieldInTesla(const GlobalPoint& gp) const {
MagVolume const* v = nullptr;
v = findVolume(gp);
if (v != nullptr) {
return v->fieldInTesla(gp);
}
// Fall-back case: no volume found
if (edm::isNotFinite(gp.mag())) {
LogWarning("MagneticField") << "Input value invalid (not a number): " << gp << endl;
} else {
LogWarning("MagneticField") << "MagGeometry::fieldInTesla: failed to find volume for " << gp << endl;
}
return GlobalVector();
}
// Linear search implementation (just for testing)
MagVolume const* MagGeometry::findVolume1(const GlobalPoint& gp, double tolerance) const {
MagVolume6Faces const* found = nullptr;
int errCnt = 0;
if (inBarrel(gp)) { // Barrel
for (vector<MagVolume6Faces const*>::const_iterator v = theBVolumes.begin(); v != theBVolumes.end(); ++v) {
if ((*v) == nullptr) { //FIXME: remove this check
LogError("MagGeometry") << endl << "***ERROR: MagGeometry::findVolume: MagVolume for barrel not set" << endl;
++errCnt;
if (errCnt < 3)
continue;
else
break;
}
if ((*v)->inside(gp, tolerance)) {
found = (*v);
break;
}
}
} else { // Endcaps
for (vector<MagVolume6Faces const*>::const_iterator v = theEVolumes.begin(); v != theEVolumes.end(); ++v) {
if ((*v) == nullptr) { //FIXME: remove this check
LogError("MagGeometry") << endl << "***ERROR: MagGeometry::findVolume: MagVolume for endcap not set" << endl;
++errCnt;
if (errCnt < 3)
continue;
else
break;
}
if ((*v)->inside(gp, tolerance)) {
found = (*v);
break;
}
}
}
return found;
}
// Use hierarchical structure for fast lookup.
MagVolume const* MagGeometry::findVolume(const GlobalPoint& gp, double tolerance) const {
// Clear volume cache if this is a new instance
if (me_ != localInstance) {
LogTrace("MagGeometry_cache") << "*** In MagGeometry::findVolume resetting cache: me=" << me_
<< " localInstance=" << localInstance << endl;
localInstance = me_;
lastVolume = nullptr;
}
if (lastVolume != nullptr && lastVolume->inside(gp)) {
return lastVolume;
}
MagVolume const* result = nullptr;
if (inBarrel(gp)) { // Barrel
double aRsq = gp.perp2();
int bin = theBarrelBinFinder->binIndex(aRsq);
// Search up to 3 layers inwards. This may happen for very thin layers.
for (int bin1 = bin; bin1 >= max(0, bin - 3); --bin1) {
LogTrace("MagGeometry") << "Trying layer at R " << theBLayers[bin1]->minR() << " " << sqrt(aRsq) << endl;
result = theBLayers[bin1]->findVolume(gp, tolerance);
LogTrace("MagGeometry") << "***In blayer " << bin1 - bin << " " << (result == nullptr ? " failed " : " OK ")
<< endl;
if (result != nullptr)
break;
}
} else { // Endcaps
Geom::Phi<float> phi = gp.phi();
if (theEndcapBinFinder != nullptr && !theESectors.empty()) {
int bin = theEndcapBinFinder->binIndex(phi);
LogTrace("MagGeometry") << "Trying endcap sector at phi " << theESectors[bin]->minPhi() << " " << phi << endl;
result = theESectors[bin]->findVolume(gp, tolerance);
LogTrace("MagGeometry") << "***In guessed esector " << (result == nullptr ? " failed " : " OK ") << endl;
} else
edm::LogError("MagGeometry") << "Endcap empty";
}
if (result == nullptr && tolerance < 0.0001) {
// If search fails, retry with a 300 micron tolerance.
// This is a hack for thin gaps on air-iron boundaries,
// which will not be present anymore once surfaces are matched.
LogTrace("MagGeometry") << "Increasing the tolerance to 0.03" << endl;
result = findVolume(gp, 0.03);
}
if (cacheLastVolume)
lastVolume = result;
return result;
}
bool MagGeometry::inBarrel(const GlobalPoint& gp) const {
double aZ = fabs(gp.z());
double aRsq = gp.perp2();
return ((aZ < theBarrelZ0) || (aZ < theBarrelZ1 && aRsq > theBarrelRsq1) ||
(aZ < theBarrelZ2 && aRsq > theBarrelRsq2));
}