lar::example::PositionExtractor< Point > Struct Template Reference

Helper extractor for point coordinates. More...

#include <SpacePartition.h>

Detailed Description

template<typename Point>
struct lar::example::PositionExtractor< Point >

Helper extractor for point coordinates.

Template Parameters

Point

type of point structure

The mandatory interface is:

• static T x(Point const& point): return x coordinate of point
• static T y(Point const& point): return y coordinate of point
• static T z(Point const& point): return z coordinate of point

The type T must be convertible to a number (typically a real one). Examples of specialisation:

struct SpaceTime_t {
  double x, y, z; ///< space coordinates
  double t;       ///< time coordinate
};

namespace lar {
  namespace examples {

    template <>
    struct PositionExtractor<SpaceTime_t> {

      static double x(SpaceTime_t const& st) { return st.x; }
      static double y(SpaceTime_t const& st) { return st.y; }
      static double z(SpaceTime_t const& st) { return st.z; }

    };

    template <>
    struct PositionExtractor<SpaceTime_t const*> {

      static double x(SpaceTime_t const* st) { return st->x; }
      static double y(SpaceTime_t const* st) { return st->y; }
      static double z(SpaceTime_t const* st) { return st->z; }

    };

  }
}

The argument of the function just needs to be something the template argument can be converted into: in the second example, the argument of X is not required to br exactly SpaceTime_t const* const&.

Definition at line 86 of file SpacePartition.h.

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The documentation for this struct was generated from the following file:

• SpacePartition.h