LArPointingClusterHelper.h

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#ifndef LAR_POINTING_CLUSTER_HELPER_H
#define LAR_POINTING_CLUSTER_HELPER_H 1

#include "Objects/Cluster.h"

#include "larpandoracontent/LArObjects/LArPointingCluster.h"

namespace lar_content
{

class LArPointingClusterHelper
{
public:
    static float GetLengthSquared(const LArPointingCluster &pointingCluster);

    static float GetLength(const LArPointingCluster &pointingCluster);

    static bool IsNode(const pandora::CartesianVector &parentVertex, const LArPointingCluster::Vertex &daughterVertex,
        const float minLongitudinalDistance, const float maxTransverseDistance);

    static bool IsEmission(const pandora::CartesianVector &parentVertex, const LArPointingCluster::Vertex &daughterVertex,
        const float minLongitudinalDistance, const float maxLongitudinalDistance, const float maxTransverseDistance, const float angularAllowance);

    static pandora::CartesianVector GetProjectedPosition(const pandora::CartesianVector &initialPosition, const pandora::CartesianVector &initialDirection,
        const pandora::Cluster *const pCluster, const float projectionAngularAllowance);

    static void GetClosestVertices(const bool useX, const bool useY, const bool useZ,
        const LArPointingCluster &pointingClusterI, const LArPointingCluster &pointingClusterJ,
        LArPointingCluster::Vertex &closestVertexI, LArPointingCluster::Vertex &closestVertexJ);

    static void GetClosestVertices(const LArPointingCluster &pointingClusterI, const LArPointingCluster &pointingClusterJ,
        LArPointingCluster::Vertex &closestVertexI, LArPointingCluster::Vertex &closestVertexJ);

    static void GetClosestVerticesInX(const LArPointingCluster &pointingClusterI, const LArPointingCluster &pointingClusterJ,
        LArPointingCluster::Vertex &closestVertexI, LArPointingCluster::Vertex &closestVertexJ);

    static void GetClosestVerticesInYZ(const LArPointingCluster &pointingClusterI, const LArPointingCluster &pointingClusterJ,
        LArPointingCluster::Vertex &closestVertexI, LArPointingCluster::Vertex &closestVertexJ);

    static void GetImpactParametersInYZ(const LArPointingCluster::Vertex &pointingVertex, const LArPointingCluster::Vertex &targetVertex,
        float &longitudinal, float &transverse);

    static void GetImpactParameters(const LArPointingCluster::Vertex &pointingVertex, const LArPointingCluster::Vertex &targetVertex,
        float &longitudinal, float &transverse);

    static void GetImpactParameters(const LArPointingCluster::Vertex &pointingVertex, const pandora::CartesianVector &targetPosition,
        float &longitudinal, float &transverse);

    static void GetImpactParameters(const pandora::CartesianVector &initialPosition, const pandora::CartesianVector &initialDirection,
        const pandora::CartesianVector &targetPosition, float &longitudinal, float &transverse);

    static void GetIntersection(const LArPointingCluster::Vertex &firstVertex, const LArPointingCluster::Vertex &secondVertex,
        pandora::CartesianVector &intersectPosition, float &firstDisplacement, float &secondDisplacement);

    static void GetAverageDirection(const LArPointingCluster::Vertex &firstVertex, const LArPointingCluster::Vertex &secondVertex,
        pandora::CartesianVector &averageDirection);

    static void GetIntersection(const pandora::CartesianVector &firstPosition, const pandora::CartesianVector &firstDirection,
        const pandora::CartesianVector &secondPosition, const pandora::CartesianVector &secondDirection,
        pandora::CartesianVector &intersectPosition, float &firstDisplacement, float &secondDisplacement);

    static void GetIntersection(const LArPointingCluster::Vertex &vertexCluster, const pandora::Cluster *const pTargetCluster,
        pandora::CartesianVector &intersectPosition, float &displacementL, float &displacementT);

    static LArPointingCluster::Vertex GetBestVertexEstimate(const LArPointingClusterVertexList &vertexList, const LArPointingClusterList &pointingClusterList,
        const float minLongitudinalDistance, const float maxLongitudinalDistance, const float maxTransverseDistance, const float angularAllowance);

private:
    static void CollectAssociatedClusters(const LArPointingCluster::Vertex &vertex, const LArPointingClusterList &inputList, const float minLongitudinalDistance,
        const float maxLongitudinalDistance, const float maxTransverseDistance, const float angularAllowance, LArPointingClusterVertexList &outputList);

    static float GetAssociatedEnergy(const LArPointingCluster::Vertex &vertex, const LArPointingClusterVertexList &clusterVertices);
};

} // namespace lar_content

#endif // #ifndef LAR_POINTING_CLUSTER_HELPER_H