HGCSiliconDetId.h

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#ifndef DataFormats_ForwardDetId_HGCSiliconDetId_H
#define DataFormats_ForwardDetId_HGCSiliconDetId_H 1

#include <iosfwd>
#include "DataFormats/DetId/interface/DetId.h"
#include "DataFormats/ForwardDetId/interface/ForwardSubdetector.h"
#include "FWCore/Utilities/interface/Exception.h"

/* \brief description of the bit assigment
   [0:4]   u-coordinate of the cell (measured from the lower left
   [5:9]   v-coordinate of the cell  corner of the wafer)
   [10:13] abs(u) of the wafer (u-axis points along -x axis)
   [14:14] sign of u (0:+u; 1:-u) (u=0 is at the center of beam line)
   [15:18] abs(v) of the wafer (v-axis points 60-degree wrt x-axis)
   [19:19] sign of v (0:+v; 1:-v) (v=0 is at the center of beam line)
   [20:24] layer number 
   [25:25] z-side (0 for +z; 1 for -z)
   [26:27] Type (0 fine divisions of wafer with 120 mum thick silicon
                 1 coarse divisions of wafer with 200 mum thick silicon
                 2 coarse divisions of wafer with 300 mum thick silicon)
   [28:31] Detector type (HGCalEE or HGCalHSi)
*/
class HGCSiliconDetId : public DetId {
public:
  enum waferType { HGCalFine = 0, HGCalCoarseThin = 1, HGCalCoarseThick = 2 };
  static const int HGCalFineN = 12;
  static const int HGCalCoarseN = 8;
  static const int HGCalFineTrigger = 3;
  static const int HGCalCoarseTrigger = 2;

  constexpr HGCSiliconDetId() : DetId() {}
  constexpr HGCSiliconDetId(uint32_t rawid) : DetId(rawid) {}
  constexpr HGCSiliconDetId(
      DetId::Detector det, int zp, int type, int layer, int waferU, int waferV, int cellU, int cellV)
      : DetId(det, ForwardEmpty) {
    int waferUabs(std::abs(waferU)), waferVabs(std::abs(waferV));
    int waferUsign = (waferU >= 0) ? 0 : 1;
    int waferVsign = (waferV >= 0) ? 0 : 1;
    int zside = (zp < 0) ? 1 : 0;
    id_ |= (((cellU & kHGCalCellUMask) << kHGCalCellUOffset) | ((cellV & kHGCalCellVMask) << kHGCalCellVOffset) |
            ((waferUabs & kHGCalWaferUMask) << kHGCalWaferUOffset) |
            ((waferUsign & kHGCalWaferUSignMask) << kHGCalWaferUSignOffset) |
            ((waferVabs & kHGCalWaferVMask) << kHGCalWaferVOffset) |
            ((waferVsign & kHGCalWaferVSignMask) << kHGCalWaferVSignOffset) |
            ((layer & kHGCalLayerMask) << kHGCalLayerOffset) | ((zside & kHGCalZsideMask) << kHGCalZsideOffset) |
            ((type & kHGCalTypeMask) << kHGCalTypeOffset));
  }

  constexpr HGCSiliconDetId(const DetId& gen) {
    if (!gen.null()) {
      if ((gen.det() != HGCalEE) && (gen.det() != HGCalHSi)) {
        throw cms::Exception("Invalid DetId")
            << "Cannot initialize HGCSiliconDetId from " << std::hex << gen.rawId() << std::dec;
      }
    }
    id_ = gen.rawId();
  }

  constexpr HGCSiliconDetId& operator=(const DetId& gen) {
    if (!gen.null()) {
      if ((gen.det() != HGCalEE) && (gen.det() != HGCalHSi)) {
        throw cms::Exception("Invalid DetId")
            << "Cannot assign HGCSiliconDetId from " << std::hex << gen.rawId() << std::dec;
      }
    }
    id_ = gen.rawId();
    return (*this);
  }

  constexpr HGCSiliconDetId geometryCell() const {
    return HGCSiliconDetId(det(), zside(), 0, layer(), waferU(), waferV(), 0, 0);
  }
  constexpr HGCSiliconDetId moduleId() const {
    return HGCSiliconDetId(det(), zside(), type(), layer(), waferU(), waferV(), 0, 0);
  }

  constexpr DetId::Detector subdet() const { return det(); }

  constexpr int type() const { return (id_ >> kHGCalTypeOffset) & kHGCalTypeMask; }

  constexpr int zside() const { return (((id_ >> kHGCalZsideOffset) & kHGCalZsideMask) ? -1 : 1); }

  constexpr int layer() const { return (id_ >> kHGCalLayerOffset) & kHGCalLayerMask; }

  constexpr int cellU() const { return (id_ >> kHGCalCellUOffset) & kHGCalCellUMask; }
  constexpr int cellV() const { return (id_ >> kHGCalCellVOffset) & kHGCalCellVMask; }
  constexpr std::pair<int, int> cellUV() const { return std::pair<int, int>(cellU(), cellV()); }
  constexpr int cellX() const {
    int N = (type() == HGCalFine) ? HGCalFineN : HGCalCoarseN;
    return (3 * (cellV() - N) + 2);
  }
  constexpr int cellY() const {
    int N = (type() == HGCalFine) ? HGCalFineN : HGCalCoarseN;
    return (2 * cellU() - (N + cellV()));
  }
  constexpr std::pair<int, int> cellXY() const { return std::pair<int, int>(cellX(), cellY()); }

  constexpr int waferUAbs() const { return (id_ >> kHGCalWaferUOffset) & kHGCalWaferUMask; }
  constexpr int waferVAbs() const { return (id_ >> kHGCalWaferVOffset) & kHGCalWaferVMask; }
  constexpr int waferU() const {
    return (((id_ >> kHGCalWaferUSignOffset) & kHGCalWaferUSignMask) ? -waferUAbs() : waferUAbs());
  }
  constexpr int waferV() const {
    return (((id_ >> kHGCalWaferVSignOffset) & kHGCalWaferVSignMask) ? -waferVAbs() : waferVAbs());
  }
  constexpr std::pair<int, int> waferUV() const { return std::pair<int, int>(waferU(), waferV()); }
  constexpr int waferX() const { return (-2 * waferU() + waferV()); }
  constexpr int waferY() const { return (2 * waferV()); }
  constexpr std::pair<int, int> waferXY() const { return std::pair<int, int>(waferX(), waferY()); }
  constexpr void unpack(int& ty, int& zs, int& ly, int& wU, int& wV, int& cU, int& cV) const {
    ty = type();
    zs = zside();
    ly = layer();
    wU = waferU();
    wV = waferV();
    cU = cellU();
    cV = cellV();
  }

  // get trigger cell u,v
  constexpr int triggerCellU() const {
    int N = (type() == HGCalFine) ? HGCalFineN : HGCalCoarseN;
    int NT = (type() == HGCalFine) ? HGCalFineTrigger : HGCalCoarseTrigger;
    return (cellU() >= N && cellV() >= N)
               ? cellU() / NT
               : ((cellU() < N && cellU() <= cellV()) ? cellU() / NT : (1 + (cellU() - (cellV() % NT + 1)) / NT));
  }
  constexpr int triggerCellV() const {
    int N = (type() == HGCalFine) ? HGCalFineN : HGCalCoarseN;
    int NT = (type() == HGCalFine) ? HGCalFineTrigger : HGCalCoarseTrigger;
    return (cellU() >= N && cellV() >= N)
               ? cellV() / NT
               : ((cellU() < N && cellU() <= cellV()) ? ((cellV() - cellU()) / NT + cellU() / NT) : cellV() / NT);
  }
  constexpr std::pair<int, int> triggerCellUV() const { return std::pair<int, int>(triggerCellU(), triggerCellV()); }

  constexpr bool isEE() const { return (det() == HGCalEE); }
  constexpr bool isHE() const { return (det() == HGCalHSi); }
  constexpr bool isForward() const { return true; }

  static const HGCSiliconDetId Undefined;

public:
  static constexpr uint32_t kHGCalCellUOffset = 0;
  static constexpr uint32_t kHGCalCellUMask = 0x1F;
  static constexpr uint32_t kHGCalCellVOffset = 5;
  static constexpr uint32_t kHGCalCellVMask = 0x1F;
  static constexpr uint32_t kHGCalWaferUOffset = 10;
  static constexpr uint32_t kHGCalWaferUMask = 0xF;
  static constexpr uint32_t kHGCalWaferUSignOffset = 14;
  static constexpr uint32_t kHGCalWaferUSignMask = 0x1;
  static constexpr uint32_t kHGCalWaferVOffset = 15;
  static constexpr uint32_t kHGCalWaferVMask = 0xF;
  static constexpr uint32_t kHGCalWaferVSignOffset = 19;
  static constexpr uint32_t kHGCalWaferVSignMask = 0x1;
  static constexpr uint32_t kHGCalLayerOffset = 20;
  static constexpr uint32_t kHGCalLayerMask = 0x1F;
  static constexpr uint32_t kHGCalZsideOffset = 25;
  static constexpr uint32_t kHGCalZsideMask = 0x1;
  static constexpr uint32_t kHGCalTypeOffset = 26;
  static constexpr uint32_t kHGCalTypeMask = 0x3;
};

std::ostream& operator<<(std::ostream&, const HGCSiliconDetId& id);

#endif