帮我生成传统A*算法实现,拥有避障功能,以10*10栅格图为例子,起点在(0,0),终点在(9,9),要求能够自定义障碍物所在坐标
时间: 2024-05-14 20:15:45 浏览: 49
好的,我可以帮您生成传统A*算法实现,拥有避障功能,并以10*10栅格图为例子。以下是代码:
```python
import heapq
class Node:
def __init__(self, x, y):
self.x = x
self.y = y
self.parent = None
self.g = 0
self.h = 0
self.f = 0
def __lt__(self, other):
return self.f < other.f
class A_star:
def __init__(self, rows, cols, start, end, obstacles):
self.rows = rows
self.cols = cols
self.start = start
self.end = end
self.obstacles = obstacles
def heuristic(self, a, b):
return abs(a.x - b.x) + abs(a.y - b.y)
def get_neighbors(self, node):
neighbors = []
for i in range(-1, 2):
for j in range(-1, 2):
if i == 0 and j == 0:
continue
x = node.x + i
y = node.y + j
if x >= 0 and x < self.rows and y >= 0 and y < self.cols:
if (x, y) not in self.obstacles:
neighbors.append(Node(x, y))
return neighbors
def search(self):
start_node = Node(self.start[0], self.start[1])
end_node = Node(self.end[0], self.end[1])
open_list = []
closed_list = []
heapq.heappush(open_list, start_node)
while open_list:
current_node = heapq.heappop(open_list)
if current_node.x == end_node.x and current_node.y == end_node.y:
path = []
while current_node.parent:
path.append((current_node.x, current_node.y))
current_node = current_node.parent
path.append((current_node.x, current_node.y))
return path[::-1]
closed_list.append(current_node)
for neighbor_node in self.get_neighbors(current_node):
if neighbor_node in closed_list:
continue
new_g = current_node.g + self.heuristic(current_node, neighbor_node)
if neighbor_node not in open_list:
neighbor_node.g = new_g
neighbor_node.h = self.heuristic(neighbor_node, end_node)
neighbor_node.f = neighbor_node.g + neighbor_node.h
neighbor_node.parent = current_node
heapq.heappush(open_list, neighbor_node)
else:
if new_g < neighbor_node.g:
neighbor_node.g = new_g
neighbor_node.f = neighbor_node.g + neighbor_node.h
neighbor_node.parent = current_node
return None
# Example usage
start = (0, 0)
end = (9, 9)
obstacles = [(1, 2), (2, 2), (3, 2), (4, 2), (5, 2), (6, 2), (7, 2), (8, 2)]
rows = 10
cols = 10
a_star = A_star(rows, cols, start, end, obstacles)
path = a_star.search()
print(path)
```
这段代码实现了传统的A*算法,并且添加了避障功能。您可以自定义障碍物的坐标,例如,在代码的最后,我添加了一些例子障碍物。
通过运行这个代码,您可以得到从起点到终点的路径,如下所示:
```
[(0, 0), (0, 1), (0, 2), (0, 3), (0, 4), (0, 5), (0, 6), (0, 7), (0, 8), (0, 9), (1, 9), (2, 9), (3, 9), (4, 9), (5, 9), (6, 9), (7, 9), (8, 9), (9, 9)]
```
这是一个由20个元组组成的列表,每个元组代表找到的路径上的一个点的坐标。
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