Class: GpxDoctor::CumulativeDistanceEnhancer

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

Instance Method Summary collapse

Instance Method Details

#enhance(waypoints) ⇒ Object

Enhances each waypoint with cumulative distance from the start of the segment/route. The first point receives cumulative_distance = 0.0 Each subsequent point receives cumulative_distance = previous.cumulative_distance + distance from previous Distance is stored in kilometers for metric and miles for imperial.

Mutates waypoints in place.



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# File 'lib/gpx_doctor/cumulative_distance_enhancer.rb', line 11

def enhance(waypoints)
  return if waypoints.nil? || waypoints.empty?

  unit_system = GpxDoctor.configuration.unit_system

  cumulative = 0.0
  waypoints.first.cumulative_distance = cumulative

  waypoints.each_cons(2) do |current, nxt|
    distance_meters = DistanceCalculator.distance(current, nxt)
    distance_km = distance_meters / 1000.0
    distance_converted = UnitConverter.convert_cumulative_distance(distance_km, unit_system)
    cumulative += distance_converted
    nxt.cumulative_distance = cumulative
  end
end