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126 lines
4.4 KiB
Python
126 lines
4.4 KiB
Python
"""
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Created on 17 oct. 2018
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@author: Axel Huynh-Phuc, Thibaud Gasser
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"""
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"""
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This module is used for loading simulation data
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"""
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import json
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import os
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import traci
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from typing import List
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import jsonpickle
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from parse import search
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from shapely.geometry import LineString
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from model import Area, Lane, TrafficLight, Phase, Logic
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class Data:
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def __init__(self, dump_name, map_bounds, areas_number,simulation_dir):
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"""
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Data constructor
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:param dump_name : The dump name chosen by the user
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:param map_bounds: The bounds of the simulated map
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:param areas_number: The number of areas in line and row chosen by the user
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:param simulation_dir: The directory which contains all files needed for SUMO
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"""
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self.dump_name = dump_name
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self.map_bounds = map_bounds
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self.areas_number = areas_number
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self.dir = simulation_dir
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def init_grid(self):
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"""
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Initialize the grid of the loaded map from the cfg file with areas_number x areas_number areas
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"""
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self.grid = list()
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areas_number = self.areas_number
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width = self.map_bounds[1][0] / areas_number
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height = self.map_bounds[1][1] / areas_number
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for i in range(areas_number):
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for j in range(areas_number):
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# bounds coordinates for the area : (xmin, ymin, xmax, ymax)
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ar_bounds = ((i * width, j * height), (i * width, (j + 1) * height),
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((i + 1) * width, (j + 1) * height), ((i + 1) * width, j * height))
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name = 'Area ({},{})'.format(i, j)
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area = Area(ar_bounds, name)
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self.grid.append(area)
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return self.grid
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def get_all_lanes(self) -> List[Lane]:
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"""
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Recover and creates a list of Lane objects
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:return: The lanes list
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"""
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lanes = []
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for lane_id in traci.lane.getIDList():
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polygon_lane = LineString(traci.lane.getShape(lane_id))
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initial_max_speed = traci.lane.getMaxSpeed(lane_id)
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lanes.append(Lane(lane_id, polygon_lane, initial_max_speed))
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return lanes
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def parse_phase(self, phase_repr):
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"""
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Because the SUMO object Phase does not contain accessors,
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we parse the string representation to retrieve data members.
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:param phase_repr: The Phase string representation
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:return: An new Phase instance
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"""
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duration = search('duration: {:f}', phase_repr)
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min_duration = search('minDuration: {:f}', phase_repr)
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max_duration = search('maxDuration: {:f}', phase_repr)
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phase_def = search('phaseDef: {}\n', phase_repr)
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if phase_def is None:
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phase_def = ''
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else:
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phase_def = phase_def[0]
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return Phase(duration[0], min_duration[0], max_duration[0], phase_def)
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def add_data_to_areas(self):
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"""
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Adds all recovered data to different areas
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:param areas: The list of areas
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:return:
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"""
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lanes = self.get_all_lanes()
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for area in self.grid:
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for lane in lanes: # add lanes
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if area.rectangle.intersects(lane.polygon):
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area.add_lane(lane)
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for tl_id in traci.trafficlight.getIDList(): # add traffic lights
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if lane.lane_id in traci.trafficlight.getControlledLanes(tl_id):
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logics = []
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for l in traci.trafficlight.getCompleteRedYellowGreenDefinition(tl_id): # add logics
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phases = []
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for phase in traci.trafficlight.Logic.getPhases(l): # add phases to logics
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phases.append(self.parse_phase(phase.__repr__()))
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logics.append(Logic(l, phases))
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area.add_tl(TrafficLight(tl_id, logics))
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def save(self):
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"""
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Save simulation data into a json file
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:param dump_name: The name of your data dump
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:return:
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"""
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dump_dir = f'{self.dir}/dump'
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if not os.path.exists(dump_dir):
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os.mkdir(dump_dir)
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s = json.dumps(json.loads(jsonpickle.encode(self)), indent=4) # for pretty JSON
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with open(f'{dump_dir}/{self.dump_name}.json', 'w') as f:
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f.write(s)
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