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import os
from datetime import datetime
import torch
import numpy as np
class Raw_VRP_Data(object):
def __init__(self, dataset_size=1000, num_nodes=30, num_depots=1):
self.dataset_size = dataset_size
self.num_nodes = num_nodes
self.num_depots = num_depots
num_cars = num_nodes # كل Node له Car افتراضي
# Fleet data
launch_time = torch.zeros(self.dataset_size, num_cars, 1)
car_start_node = torch.randint(low=0, high=num_depots, size=(self.dataset_size, num_cars, 1))
self.fleet = {
'start_time': launch_time,
'car_start_node': car_start_node,
}
# Graph data
a = torch.arange(num_nodes).reshape(1, 1, -1).repeat(self.dataset_size, num_cars, 1)
b = car_start_node.repeat(1, 1, num_nodes)
depot = ((a == b).sum(dim=1) > 0).float().unsqueeze(2)
start_times = (torch.rand(self.dataset_size, num_nodes, 1) * 2 + 3) * (1 - depot)
end_times = start_times + (0.1 + 0.5 * torch.rand(self.dataset_size, num_nodes, 1)) * (1 - depot)
node_positions = torch.rand(self.dataset_size, num_nodes, 2)
distance_matrix = self.compute_distance_matrix(node_positions)
time_matrix = distance_matrix.clone()
self.graph = {
'start_times': start_times,
'end_times': end_times,
'depot': depot,
'node_vector': node_positions,
'distance_matrix': distance_matrix,
'time_matrix': time_matrix
}
self.data = {
'fleet': self.fleet,
'graph': self.graph
}
def compute_distance_matrix(self, node_positions):
x = node_positions.unsqueeze(1).repeat(1, self.num_nodes, 1, 1)
y = node_positions.unsqueeze(2).repeat(1, 1, self.num_nodes, 1)
distance = torch.sqrt(((x - y) ** 2).sum(dim=3))
return distance
def get_data(self):
return self.data
def save_data(self, fp):
torch.save(self.data, fp)
if __name__ == '__main__':
# إعدادات من params.json
size = 5000
num_nodes = 30
num_depots = 1
save_path = os.path.join(os.getcwd(), 'VRP_data.pt')
print("Generating data...")
start = datetime.now()
raw_data = Raw_VRP_Data(dataset_size=size, num_nodes=num_nodes, num_depots=num_depots)
raw_data.save_data(save_path)
duration = (datetime.now() - start).seconds
print(f"✅ Data generation completed in {duration} seconds.")
print(f"📦 Saved to: {save_path}")
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