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, flat-earth Pythagorean approximation)
- elevation_change   (meters, next.ele - current.ele; nil when elevation missing)
- 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

  waypoints.each_cons(2) do |current, nxt|
    current.distance_to_next = DistanceCalculator.distance(current, nxt)

    current.elevation_change = if current.ele && nxt.ele
                                 nxt.ele - current.ele
                               end

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