// 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.

/// @file EventVertex.h

/// @author ruben.shahoyan@cern.ch, michael.lettrich@cern.ch

/// @since 2021-02-01

/// @brief Special fake "sensor" for event vertex.

#include "Align/Controller.h"

#include "Align/EventVertex.h"

#include "Align/AlignmentPoint.h"

#include "Align/AlignableDetector.h"

#include "Framework/Logger.h"

#include <TMath.h>

using namespace TMath;

namespace o2

{

namespace align

{

//_________________________________________________________

EventVertex::EventVertex(Controller* ctr) : AlignableSensor("Vertex", 0, 1, ctr)

{

// def c-tor

setVarFrame(kLOC);

setFreeDOFPattern(BIT(kDOFTX) | BIT(kDOFTY) | BIT(kDOFTZ));

//

}

//____________________________________________

void EventVertex::prepareMatrixT2L()

{

// T2L matrix for vertex needs to be adjusted for every track

// in order to have X axis along the track direction.

// This method assumes that the mAlp was already set accordingly

// fX is fixed to 0

//

mMatT2L.Clear();

mMatT2L.RotateZ(mAlp * RadToDeg());

// mMatT2L.MultiplyLeft(&getMatrixL2GIdeal().Inverse()); L2G=I !!!

//

}

//____________________________________________

void EventVertex::applyCorrection(double* vtx) const

{

// apply eventual correction to supplied vertex position

vtx[kDOFTX] += getParVal(kDOFTX);

vtx[kDOFTY] += getParVal(kDOFTY);

vtx[kDOFTZ] += getParVal(kDOFTZ);

//

}

} // namespace align

} // namespace o2