allpix::LiangBarsky

#include <liang_barsky.h>

Public Functions

Public Functions Documentation

function intersectionDistances

static inline std::optional< std::pair< double, double > > intersectionDistances(
    const ROOT::Math::XYZVector & direction,
    const ROOT::Math::XYZPoint & position,
    const ROOT::Math::XYZVector & box
)

Check intersection of a line defined by a point and a vector with a box.

Parameters:

• direction Defining vector of the line
• position A point on that line
• box Size of the box to calculate the intersections with

Return: Pair of signed distances from position to intersection points along the line in units of length of direction, with sign of these distances meaning direction w.r.t. line-defining vector or std::nullopt if the line has no intersection with the given box

function closestIntersection

static inline std::optional< ROOT::Math::XYZPoint > closestIntersection(
    const ROOT::Math::XYZVector & direction,
    const ROOT::Math::XYZPoint & position,
    const ROOT::Math::XYZVector & box
)

Get closest intersection point in positive direction.

Parameters:

• direction Direction vector of the motion
• position Original (“before”) position to be considered
• box Size of the box to calculate the intersections with

Return: Closest intersection with box in the direction indicated by input vector or std::nullopt if no intersection of track segment with the box volume can be found in positive direction from the given position.

Updated on 2025-02-27 at 14:14:46 +0000