Class: GpxDoctor::StatisticsEnhancer

Inherits:
Object
  • Object
show all
Defined in:
lib/gpx_doctor/statistics_enhancer.rb

Instance Method Summary collapse

Instance Method Details

#enhance(waypoints) ⇒ Object

Enhances each consecutive pair of waypoints with statistics:

- distance_to_next  (meters or feet depending on configuration)
- elevation_change  (meters or feet depending on configuration)
- direction         (degrees 0-360, geographic bearing to next point)

The last point in the list receives nil for all three fields. Mutates waypoints in place.



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# File 'lib/gpx_doctor/statistics_enhancer.rb', line 12

def enhance(waypoints)
  return if waypoints.nil? || waypoints.size < 2

  unit_system = GpxDoctor.configuration.unit_system

  waypoints.each_cons(2) do |current, nxt|
    distance_meters = DistanceCalculator.distance(current, nxt)
    current.distance_to_next = UnitConverter.convert_distance(distance_meters, unit_system)

    current.elevation_change = if current.ele && nxt.ele
                                 elevation_change_meters = nxt.ele - current.ele
                                 UnitConverter.convert_elevation(elevation_change_meters, unit_system)
                               end

    current.direction = DistanceCalculator.bearing(current, nxt)
  end
end