ThreeViewShowerHitsTool.cc

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/**
 *  @file   larpandoracontent/LArThreeDReco/LArHitCreation/ThreeViewShowerHitsTool.cc
 *
 *  @brief  Implementation of the three view shower hits tool.
 *
 *  $Log: $
 */

#include "Pandora/AlgorithmHeaders.h"

#include "larpandoracontent/LArHelpers/LArGeometryHelper.h"

#include "larpandoracontent/LArThreeDReco/LArHitCreation/ThreeViewShowerHitsTool.h"

using namespace pandora;

namespace lar_content
{

ThreeViewShowerHitsTool::ThreeViewShowerHitsTool() : m_zTolerance(1.f)
{
}

//------------------------------------------------------------------------------------------------------------------------------------------

void ThreeViewShowerHitsTool::GetShowerHit3D(const CaloHitVector &caloHitVector1, const CaloHitVector &caloHitVector2, ProtoHit &protoHit) const
{
    if (caloHitVector1.empty() || caloHitVector2.empty())
        throw StatusCodeException(STATUS_CODE_NOT_FOUND);

    const HitType hitType1(caloHitVector1.at(0)->GetHitType());
    const HitType hitType2(caloHitVector2.at(0)->GetHitType());

    const CaloHit *const pCaloHit2D(protoHit.GetParentCaloHit2D());
    const HitType hitType2D(pCaloHit2D->GetHitType());
    const float position2D(pCaloHit2D->GetPositionVector().GetZ());

    for (const CaloHit *const pCaloHit1 : caloHitVector1)
    {
        const CartesianVector &position1(pCaloHit1->GetPositionVector());
        const float prediction(LArGeometryHelper::MergeTwoPositions(this->GetPandora(), hitType2D, hitType1, position2D, position1.GetZ()));

        for (const CaloHit *const pCaloHit2 : caloHitVector2)
        {
            const CartesianVector &position2(pCaloHit2->GetPositionVector());

            if (std::fabs(position2.GetZ() - prediction) > m_zTolerance)
                continue;

            ProtoHit thisProtoHit(pCaloHit2D);
            this->GetBestPosition3D(hitType1, hitType2, position1, position2, thisProtoHit);

            if (!protoHit.IsPositionSet() || (thisProtoHit.GetChi2() < protoHit.GetChi2()))
                protoHit = thisProtoHit;
        }
    }
}

//------------------------------------------------------------------------------------------------------------------------------------------

StatusCode ThreeViewShowerHitsTool::ReadSettings(const TiXmlHandle xmlHandle)
{
    PANDORA_RETURN_RESULT_IF_AND_IF(STATUS_CODE_SUCCESS, STATUS_CODE_NOT_FOUND, !=, XmlHelper::ReadValue(xmlHandle, "ZTolerance", m_zTolerance));

    return ShowerHitsBaseTool::ReadSettings(xmlHandle);
}

} // namespace lar_content