SI_Traktor/pathfinding_tractorless.py

68 lines
2.4 KiB
Python

from queue import PriorityQueue
import time
class pathfinding_tractorless():
def __init__(self):
pass
def heuristic(self,a, b):
(x1, y1) = a
(x2, y2) = b
return abs(x1 - x2) + abs(y1 - y2)
def points(self, point):
self.point = []
for i in [[point[0],point[1]-1],[point[0]-1,point[1]],[point[0],point[1]+1],[point[0]+1,point[1]]]:
if i[0] in [-1,10] or i[1] in [-1,10]:
pass
else:
self.point.append(i)
return self.point
def pathfinding_tractorless(self,field,pola_buraczane,i):
self.pola = pola_buraczane
self.start_position = [int(self.pola[i])%10,int(self.pola[i])//10]
# print(str(self.start_position))
self.field = field
self.end_point = [int(self.pola[i+1])%10,int(self.pola[i+1])//10]
# print(str(self.end_point))
if self.start_position == self.end_point:
return 0
else:
self.route = self.a_star(self.start_position,self.end_point)
return self.route
def a_star(self,start,end):
self.a_queue = PriorityQueue()
self.a_queue.put(start,0)
self.cost = {tuple(start): 0}
self.path_from = {tuple(start): None}
self.finall_path = [tuple(end)]
self.found = 0
while not self.a_queue.empty():
self.current = tuple(self.a_queue.get())
if self.current == tuple(end):
break
for self.next in self.points(self.current):
self.new_cost = self.cost[tuple(self.current)] + self.field.get_value(self.next)
if tuple(self.next) not in self.cost or self.new_cost < self.cost[tuple(self.next)]:
self.cost[tuple(self.next)] = self.new_cost
self.priority = self.new_cost + self.heuristic(end, self.next)
self.a_queue.put(self.next,self.priority)
self.path_from[tuple(self.next)] = self.current
if self.next == end:
self.found = 1
break
if self.found:
break
self.pth = self.path_from[tuple(end)]
while not self.pth == tuple(start):
self.finall_path.append(self.pth)
self.pth = self.path_from[self.pth]
return self.new_cost