def __walkTrackSpeed(self, start, speed, dest):
log.debug("__walkTrackSpeed: called, calculating distance and travel_time")
distance = start.distance(dest)
travel_time = distance / speed
if travel_time <= Communicator.UPDATE_INTERVAL:
log.debug("__walkTrackSpeed: travel_time is <= UPDATE_INTERVAL")
time.sleep(travel_time)
log.debug("__walkTrackSpeed: starting to walk")
while travel_time > Communicator.UPDATE_INTERVAL:
log.debug("__walkTrackSpeed: sleeping for %s" % str(Communicator.UPDATE_INTERVAL))
time.sleep(Communicator.UPDATE_INTERVAL)
log.debug("__walkTrackSpeed: Next round")
travel_time -= Communicator.UPDATE_INTERVAL
# move GEOFIX_UPDATE_INTERVAL*speed meters
# in straight line between last_point and point
course = start.course(dest)
distance = Communicator.UPDATE_INTERVAL * speed
start = start + gpxdata.CourseDistance(course, distance)
startLat = start.lat
startLng = start.lon
log.debug("__walkTrackSpeed: sending location")
self.setLocation(repr(startLat), repr(startLng), "")
log.debug("__walkTrackSpeed: done sending location")
def walk_track_speed(track, speed, point):
global curr_lon
global curr_lat
while True:
try:
next_point = next(track)
except StopIteration:
print("done")
sys.exit(0)
distance = point.distance(next_point)
travel_time = distance / speed # in seconds
if travel_time <= UPDATE_INTERVAL:
time.sleep(travel_time)
while travel_time > UPDATE_INTERVAL:
time.sleep(UPDATE_INTERVAL)
travel_time -= UPDATE_INTERVAL
# move GEOFIX_UPDATE_INTERVAL*speed meters
# in straight line between last_point and point
course = point.course(next_point)
distance = UPDATE_INTERVAL * speed
point = point + gpxdata.CourseDistance(course, distance)
curr_lat = point.lat
curr_lon = point.lon
point = next_point
curr_lat = point.lat
curr_lon = point.lon
def get_new_coords(init_loc, distance, bearing):
"""
Given an initial lat/lng, a distance(in kms), and a bearing (degrees),
this will calculate the resulting lat/lng coordinates.
"""
# TODO: check for implementation with gpxdata
start = gpxdata.TrackPoint(init_loc.lat, init_loc.lng)
destination = start + gpxdata.CourseDistance(bearing, distance)
return Location(destination.lat, destination.lon)