/* Copyright(c) 1998-2007, ALICE Experiment at CERN, All rights reserved. *
* See cxx source for full Copyright notice */
-/* $Id$ */
+// $Id$
////////////////////////////////////////////////////////////////////////////////
//
#include "AliHLTMUONDataTypes.h"
+extern "C" struct AliHLTMUONTriggerRecordStruct;
+
/*
* Note: this class uses static global variables so thread protection must be
- * explicit in any multi-threaded usage.
+ * explicit in any multi-threaded usage. Or the class should be rewritten.
*/
class AliHLTMUONCalculations
{
public:
- /* Computes the momentum components based on the equations given in the
- ALICE dimuon spectrometer Technical Design Report (TDR-5): trigger section.
-
- Reference:
- "CERN/LHCC 2000-046
- Addendum 1 to ALICE TDR 5
- 15 Dec 2000"
-
- Section 3.1.2 pages 144 and 145.
-
- Input can be in meters, cm or mm.
- Output is in GeV.
- */
+ /// Calculates the momentum estimate given two track points behind the
+ /// dipole magnet and assuming origin is the interaction point.
static bool ComputeMomentum(
AliHLTFloat32_t x1,
AliHLTFloat32_t y1, AliHLTFloat32_t y2,
AliHLTFloat32_t pzB
);
+ static bool FitLineToTriggerRecord(const AliHLTMUONTriggerRecordStruct& trigger);
+
+ static bool FitLineToTriggerRecord(
+ const AliHLTMUONTriggerRecordStruct& trigger,
+ const bool hitset[4]
+ );
+
+ static bool FitLine(
+ const AliHLTMUONTriggerRecordStruct& trigger,
+ const bool hitset[4]
+ );
+
+ static AliHLTFloat32_t IdealZ1() { return fgIdealZ1; }
+ static void IdealZ1(AliHLTFloat32_t value) { fgIdealZ1 = value; }
+ static AliHLTFloat32_t IdealZ2() { return fgIdealZ2; }
+ static void IdealZ2(AliHLTFloat32_t value) { fgIdealZ2 = value; }
+
+ static AliHLTFloat32_t IdealX1() { return fgIdealX1; }
+ static AliHLTFloat32_t IdealY1() { return fgIdealY1; }
+ static AliHLTFloat32_t IdealX2() { return fgIdealX2; }
+ static AliHLTFloat32_t IdealY2() { return fgIdealY2; }
+
+ static bool FitLineToData(
+ const AliHLTFloat32_t* x, const AliHLTFloat32_t* y,
+ const AliHLTFloat32_t* z, AliHLTUInt32_t n
+ );
+
+ static bool FitLineToData(
+ const AliHLTFloat32_t* x, const AliHLTFloat32_t* z,
+ AliHLTUInt32_t n
+ );
+
+ static AliHLTFloat32_t Mzx() { return fgMzx; }
+ static AliHLTFloat32_t Mzy() { return fgMzy; }
+ static AliHLTFloat32_t Czx() { return fgCzx; }
+ static AliHLTFloat32_t Czy() { return fgCzy; }
+
+ static AliHLTFloat32_t ComputeChi2(
+ const AliHLTFloat32_t* x, const AliHLTFloat32_t* y,
+ const AliHLTFloat32_t* z, AliHLTUInt32_t n
+ );
+
+ static AliHLTFloat32_t ComputeChi2(
+ const AliHLTMUONTriggerRecordStruct& trigger,
+ const bool hitset[4]
+ );
+
+ static AliHLTFloat32_t SigmaX2() { return fgSigmaX2; }
+ static void SigmaX2(AliHLTFloat32_t value) { fgSigmaX2 = (value != 0 ? value : 1.); }
+ static AliHLTFloat32_t SigmaY2() { return fgSigmaY2; }
+ static void SigmaY2(AliHLTFloat32_t value) { fgSigmaY2 = (value != 0 ? value : 1.); }
+
private:
// Prevent destroying or creating of this object.
AliHLTMUONCalculations();
~AliHLTMUONCalculations();
- static AliHLTFloat32_t fgZf; // The Z coordinate of the middle of the dipole magnetic field.
- static AliHLTFloat32_t fgQBLScaled; // The integrated field strength times units of charge (T.m.*c/1e9)
+ static AliHLTFloat32_t fgZf; /// The Z coordinate of the middle of the dipole magnetic field.
+ static AliHLTFloat32_t fgQBLScaled; /// The integrated field strength times units of charge (T.m.*c/1e9)
+
+ static AliHLTMUONParticleSign fgSign; /// The calculated sign.
+ static AliHLTFloat32_t fgPx; /// The calculated X momentum (GeV/c).
+ static AliHLTFloat32_t fgPy; /// The calculated Y momentum (GeV/c).
+ static AliHLTFloat32_t fgPz; /// The calculated Z momentum (GeV/c).
+
+ static AliHLTFloat32_t fgSigmaX2; /// The sigma squared value for the variance / uncertainty in X coordinates.
+ static AliHLTFloat32_t fgSigmaY2; /// The sigma squared value for the variance / uncertainty in Y coordinates.
+
+ static AliHLTFloat32_t fgMzx; /// Calculated slope of the line fitted to the ZX plane. (x = fgMzx * z + fgCzx)
+ static AliHLTFloat32_t fgMzy; /// Calculated slope of the line fitted to the ZY plane. (y = fgMzy * z + fgCzy)
+ static AliHLTFloat32_t fgCzx; /// Calculated coefficient of the line fitted to the ZX plane. (x = fgMzx * z + fgCzx)
+ static AliHLTFloat32_t fgCzy; /// Calculated coefficient of the line fitted to the ZY plane. (y = fgMzy * z + fgCzy)
- static AliHLTMUONParticleSign fgSign; // The calculated sign.
- static AliHLTFloat32_t fgPx; // The calculated X momentum (GeV/c).
- static AliHLTFloat32_t fgPy; // The calculated Y momentum (GeV/c).
- static AliHLTFloat32_t fgPz; // The calculated Z momentum (GeV/c).
+ static AliHLTFloat32_t fgIdealX1; /// Ideal X coordinate of the point on MT1
+ static AliHLTFloat32_t fgIdealY1; /// Ideal Y coordinate of the point on MT1
+ static AliHLTFloat32_t fgIdealZ1; /// Ideal Z coordinate of the point on MT1
+ static AliHLTFloat32_t fgIdealX2; /// Ideal X coordinate of the point on MT2
+ static AliHLTFloat32_t fgIdealY2; /// Ideal Y coordinate of the point on MT2
+ static AliHLTFloat32_t fgIdealZ2; /// Ideal Z coordinate of the point on MT2
};
#endif // ALIHLTMUONCALCULATIONS_H
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