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Contents
# denver = CLLocationCoordinate2D.new(39.764032,-104.963112)
# cincinnati = CLLocationCoordinate2D.new(39.267024,-84.251736)
# denver.distance_to(cincinnati).in_miles
# denver.delta_miles(1101.6, -32.556) # go east 1,101.6 miles, and south 32.556 miles
class CLLocationCoordinate2D
def delta_miles(dx, dy)
earth_radius = 3963.19
_sugarcube_delta(dx, dy, earth_radius)
end
def delta_kilometers(dx, dy)
earth_radius = 6378.137
_sugarcube_delta(dx, dy, earth_radius)
end
def _sugarcube_delta(dx, dy, earth_radius)
radius_at_latitude = earth_radius * Math.cos(self.latitude * Math::PI / 180.0)
if radius_at_latitude > 0
delta_lng = dx / radius_at_latitude
delta_lng *= 180.0 / Math::PI
else
delta_lng = 0
end
delta_lat = dy / earth_radius
delta_lat *= 180.0 / Math::PI
CLLocationCoordinate2D.new(self.latitude + delta_lat, self.longitude + delta_lng)
end
private :_sugarcube_delta
def distance_to(cl_location_2d)
my_location = CLLocation.alloc.initWithLatitude(self.latitude, longitude:self.longitude)
other_location = CLLocation.alloc.initWithLatitude(cl_location_2d.latitude, longitude:cl_location_2d.longitude)
my_location.distanceFromLocation(other_location)
end
end
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88 entries across 88 versions & 1 rubygems