AlignmentMath.h

// Copyright 2019-2026 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".
//
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#ifndef O2_ITS3_ALIGNMENT_MATH_H
#define O2_ITS3_ALIGNMENT_MATH_H

#include <utility>
#include <vector>

namespace o2::its3::align
{

struct TrackSlopes {
  double dydx{0.};
  double dzdx{0.};
};

double getSensorPhiWidth(int sensorID, double radius);
std::pair<double, double> computeUV(double gloX, double gloY, double gloZ, int sensorID, double radius);
TrackSlopes computeTrackSlopes(double snp, double tgl);
std::vector<double> legendrePols(int order, double x);

} // namespace o2::its3::align

#endif