MuonPhaseII/MuonDetDescr/MuonReadoutGeometryR4/MuonReadoutGeometryR4/TgcReadoutElement.icc

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/*
  Copyright (C) 2002-2024 CERN for the benefit of the ATLAS collaboration
*/
#ifndef MUONREADOUTGEOMETRYR4_TGCREADOUTELEMENT_ICC
#define MUONREADOUTGEOMETRYR4_TGCREADOUTELEMENT_ICC
 
 
namespace ActsTrk{
    template <>  inline Amg::Transform3D 
        TransformCacheDetEle<MuonGMR4::TgcReadoutElement>::fetchTransform(const DetectorAlignStore* store) const{
            return m_parent->toStation(store) * m_parent->fromGapToChamOrigin(hash());
        }
    template <> inline Identifier
        TransformCacheDetEle<MuonGMR4::TgcReadoutElement>::identify() const {
            using RE = MuonGMR4::TgcReadoutElement;
            return m_parent->measurementId(RE::constructHash(1, RE::gasGapNumber(hash()), RE::isStrip(hash())));
        }
}
 
namespace MuonGMR4 {
inline double TgcReadoutElement::moduleWidthS() const { return 2.*m_pars.halfWidthShort; }
inline double TgcReadoutElement::moduleWidthL() const { return 2.*m_pars.halfWidthLong; }
inline double TgcReadoutElement::moduleHeight() const { return 2.*m_pars.halfHeight; }
inline double TgcReadoutElement::moduleThickness() const { return 2.*m_pars.halfThickness; }
inline double TgcReadoutElement::thickness() const { return moduleThickness(); }
inline double TgcReadoutElement::gasGapPitch() const {return m_gasThickness; }
 
inline IdentifierHash TgcReadoutElement::constructHash(unsigned int measCh,
                                                       unsigned int gasGap,
                                                       const bool isStrip) {
    /// Bit mask layout (measurment channel) | (gasGap [1-3]) | isStrip
    constexpr unsigned gapShift = 1;
    constexpr unsigned chanShift = 2 + gapShift;
    return IdentifierHash{measCh << chanShift | (gasGap -1) << gapShift | isStrip}; 
}
inline IdentifierHash TgcReadoutElement::measurementHash(const Identifier& measId) const {
    if (m_idHelper.elementID(measId) != m_idHelper.elementID(identify())) {
        ATH_MSG_WARNING("The measurement " << idHelperSvc()->toString(measId)
                        << " picks the wrong readout element " << idHelperSvc()->toStringDetEl(identify()));
    }
    return constructHash(m_idHelper.channel(measId),
                         m_idHelper.gasGap(measId),
                         m_idHelper.isStrip(measId));
}
inline IdentifierHash TgcReadoutElement::layerHash(const Identifier& measId) const {
    if (m_idHelper.elementID(measId) != m_idHelper.elementID(identify()) ) {
        ATH_MSG_WARNING("The measurement " << idHelperSvc()->toString(measId)
                        << " picks the wrong readout element " << idHelperSvc()->toStringDetEl(identify()));
    }
    return constructHash(0, m_idHelper.gasGap(measId),
                            m_idHelper.isStrip(measId));
}
inline IdentifierHash TgcReadoutElement::layerHash(const IdentifierHash& measHash) const {
    constexpr unsigned gapStripMask{(1<<2) | (1<<1) | 1};
    return IdentifierHash{static_cast<unsigned int>(measHash) & gapStripMask};
}
inline unsigned int TgcReadoutElement::channelNumber(const IdentifierHash& measHash) {
    constexpr unsigned int chanShift = 3;
    return static_cast<unsigned>(measHash) >> chanShift;
}
inline unsigned int TgcReadoutElement::gasGapNumber(const IdentifierHash& measHash) {
    /// The hash is (0/1/2/ | 0/1) -> 3 bits for the gasgap + 1 bit strip
    constexpr unsigned gapMask{(1<<1) | 1};
    constexpr unsigned stripBit{1};
    unsigned int unstripped = static_cast<unsigned>(measHash) >> stripBit;
    return (unstripped & gapMask) + 1;
}
inline bool TgcReadoutElement::isStrip(const IdentifierHash& measHash) {
    constexpr unsigned stripBit{1};
    return static_cast<unsigned>(measHash) & stripBit;
}
 
inline Identifier TgcReadoutElement::measurementId(const IdentifierHash& measHash) const {
    return m_idHelper.channelID(identify(), 
                                gasGapNumber(measHash),
                                isStrip(measHash),
                                channelNumber(measHash));
}
inline unsigned int TgcReadoutElement::nGasGaps() const { return m_pars.nGasGaps; }
 
inline unsigned int TgcReadoutElement::numChannels(const IdentifierHash& measHash) const {
    return isStrip(measHash) ? numStrips(gasGapNumber(measHash)) 
                             : numWireGangs(gasGapNumber(measHash));
}
inline unsigned int TgcReadoutElement::numStrips(unsigned int gasGap) const {
    const StripLayerPtr& sensor{sensorLayout(constructHash(0, gasGap, true))};
    return sensor ? sensor->design().numStrips() : 0;
}
inline unsigned int TgcReadoutElement::numWireGangs(unsigned int gasGap) const {
    const StripLayerPtr& sensor{sensorLayout(constructHash(0, gasGap, false))};
    return sensor ? sensor->design().numStrips() : 0;
}
inline const StripLayerPtr& TgcReadoutElement::sensorLayout(const IdentifierHash& measHash) const {
    return m_pars.sensorLayouts.at(layerHash(measHash));
}
inline const WireGroupDesign& TgcReadoutElement::wireGangLayout(unsigned int gasGap) const {
    const StripLayerPtr& layerPtr = sensorLayout(constructHash(0, gasGap, false));
    if (!layerPtr) {
        THROW_EXCEPTION(" Gas gap "<<gasGap<<" has no wire gangs in "<<idHelperSvc()->toStringDetEl(identify()));
    }
    return static_cast<const WireGroupDesign&>(layerPtr->design());
}
inline const RadialStripDesign& TgcReadoutElement::stripLayout(unsigned int gasGap)  const {
    const StripLayerPtr& layerPtr = sensorLayout(constructHash(0, gasGap, true));
    if (!layerPtr) {
        THROW_EXCEPTION(" Gas gap "<<gasGap<<" has no strips in "<<idHelperSvc()->toStringDetEl(identify()));
    }
    return static_cast<const RadialStripDesign&>(layerPtr->design());
}
inline Amg::Vector3D TgcReadoutElement::channelPosition(const ActsGeometryContext& ctx, const Identifier& measId) const {
   return channelPosition(ctx, measurementHash(measId));
}
 
}  // namespace MuonGMR4
#endif