GeometryParameters.h

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// Copyright 2019-2020 CERN and copyright holders of ALICE O2.
// See https://alice-o2.web.cern.ch/copyright for details of the copyright holders.
// All rights not expressly granted are reserved.
//
// This software is distributed under the terms of the GNU General Public
// License v3 (GPL Version 3), copied verbatim in the file "COPYING".
//
// In applying this license CERN does not waive the privileges and immunities
// granted to it by virtue of its status as an Intergovernmental Organization
// or submit itself to any jurisdiction.
 
#ifndef O2_MID_GEOMETRYPARAMETERS_H
#define O2_MID_GEOMETRYPARAMETERS_H
 
#include <array>
#include <string>
 
namespace o2
{
namespace mid
{
namespace geoparams
{
constexpr double BeamAngle = -0.794; 
 
// Standard sizes/position in the first chamber.
// The values for the other chambers can be obtained multiplying by the scaling factors below
constexpr double LocalBoardHeight = 17.;      
constexpr double LocalBoardWidth = 34.;       
constexpr double RPCCenterPos = 129.5;        
constexpr double RPCHalfLength = 127.5;       
constexpr double RPCShortCenterPos = 155.;    
constexpr double RPCShortHalfLength = 102.;   
constexpr double RPCZShift = 3.6;             
constexpr double StripUnitPitchSize = 1.0625; 
 
constexpr std::array<const double, 4> ChamberScaleFactors{{1., 1.01060, 1.06236, 1.07296}};  
constexpr std::array<const double, 4> DefaultChamberZ{{-1603.5, -1620.5, -1703.5, -1720.5}}; 
 
enum class RPCtype { Long,
                     BottomCut,
                     TopCut,
                     Short };
 
inline bool isShortRPC(int deId) { return (deId % 9 == 4); }
 
inline double getLocalBoardHeight(int chamber) { return LocalBoardHeight * ChamberScaleFactors[chamber]; }
 
inline double getLocalBoardWidth(int chamber) { return LocalBoardWidth * ChamberScaleFactors[chamber]; }
 
inline double getRPCCenterPosX(int chamber, int rpc)
{
  return isShortRPC(rpc) ? RPCShortCenterPos * ChamberScaleFactors[chamber] : RPCCenterPos * ChamberScaleFactors[chamber];
}
 
inline double getRPCHalfLength(int chamber, int rpc)
{
  return isShortRPC(rpc) ? RPCShortHalfLength * ChamberScaleFactors[chamber] : RPCHalfLength * ChamberScaleFactors[chamber];
}
 
inline double getRPCHalfHeight(int chamber) { return 2. * LocalBoardHeight * ChamberScaleFactors[chamber]; }
 
inline double getStripUnitPitchSize(int chamber) { return StripUnitPitchSize * ChamberScaleFactors[chamber]; }
 
RPCtype getRPCType(int deId);
std::string getRPCVolumeName(RPCtype type, int iChamber);
std::string getChamberVolumeName(int chamber);
} // namespace geoparams
} // namespace mid
} // namespace o2
 
#endif /* O2_MID_GEOMETRYPARAMETERS_H */