Helldragon67
edd8a8b2b9
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82 lines
2.4 KiB
Python
82 lines
2.4 KiB
Python
import yaml
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from math import sin, cos, sqrt, atan2, radians
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from ..constants import OPTIMIZER_PARAMETERS_PATH
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with OPTIMIZER_PARAMETERS_PATH.open('r') as f:
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parameters = yaml.safe_load(f)
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DETOUR_FACTOR = parameters['detour_factor']
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AVERAGE_WALKING_SPEED = parameters['average_walking_speed']
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EARTH_RADIUS_KM = 6373
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def get_time(p1: tuple[float, float], p2: tuple[float, float]) -> int:
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"""
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Calculate the time in minutes to travel from one location to another.
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Args:
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p1 (tuple[float, float]): Coordinates of the starting location.
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p2 (tuple[float, float]): Coordinates of the destination.
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Returns:
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int: Time to travel from p1 to p2 in minutes.
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"""
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if p1 == p2:
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return 0
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else:
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# Compute the distance in km along the surface of the Earth
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# (assume spherical Earth)
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# this is the haversine formula, stolen from stackoverflow
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# in order to not use any external libraries
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lat1, lon1 = radians(p1[0]), radians(p1[1])
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lat2, lon2 = radians(p2[0]), radians(p2[1])
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dlon = lon2 - lon1
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dlat = lat2 - lat1
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a = sin(dlat / 2)**2 + cos(lat1) * cos(lat2) * sin(dlon / 2)**2
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c = 2 * atan2(sqrt(a), sqrt(1 - a))
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distance = EARTH_RADIUS_KM * c
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# Consider the detour factor for average an average city
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walk_distance = distance * DETOUR_FACTOR
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# Time to walk this distance (in minutes)
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walk_time = walk_distance / AVERAGE_WALKING_SPEED * 60
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return round(walk_time)
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def get_distance(p1: tuple[float, float], p2: tuple[float, float]) -> int:
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"""
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Calculate the time in minutes to travel from one location to another.
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Args:
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p1 (tuple[float, float]): Coordinates of the starting location.
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p2 (tuple[float, float]): Coordinates of the destination.
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Returns:
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int: Time to travel from p1 to p2 in minutes.
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"""
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if p1 == p2:
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return 0
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else:
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# Compute the distance in km along the surface of the Earth
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# (assume spherical Earth)
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# this is the haversine formula, stolen from stackoverflow
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# in order to not use any external libraries
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lat1, lon1 = radians(p1[0]), radians(p1[1])
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lat2, lon2 = radians(p2[0]), radians(p2[1])
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dlon = lon2 - lon1
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dlat = lat2 - lat1
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a = sin(dlat / 2)**2 + cos(lat1) * cos(lat2) * sin(dlon / 2)**2
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c = 2 * atan2(sqrt(a), sqrt(1 - a))
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return EARTH_RADIUS_KM * c |