[2] 3-rd version of maze solver(with rxpirement and other things) ;)

AgapovaDS/docs/data/2-nd/maze.py

@@ -1,6 +1,11 @@
 import time
+import random
+import csv
+import os
 from collections import deque
 import heapq
+import matplotlib.pyplot as plt
+import numpy as np
 
 class Cell:
     def __init__(self, x, y, is_wall=False, is_start=False, is_exit=False):
@@ -165,10 +170,21 @@ class MazeSolver:
     def __init__(self, maze, strategy=None):
         self.maze = maze
         self.strategy = strategy
+        self.observers = []  # для Observer
 
     def set_strategy(self, strategy):
         self.strategy = strategy
 
+    def attach(self, observer):
+        self.observers.append(observer)
+
+    def detach(self, observer):
+        self.observers.remove(observer)
+
+    def notify(self, event):
+        for obs in self.observers:
+            obs.update(event)
+
     def solve(self):
         if self.strategy is None:
             raise ValueError("Стратегия не установлена")
@@ -176,30 +192,249 @@ class MazeSolver:
         exit_cell = self.maze.exit_cell
         if start is None or exit_cell is None:
             raise ValueError("Лабиринт не содержит старта или выхода")
+        self.notify("Поиск начат")
         start_time = time.perf_counter()
         path = self.strategy.find_path(self.maze, start, exit_cell)
         end_time = time.perf_counter()
         elapsed_ms = (end_time - start_time) * 1000
+        self.notify("Поиск завершён")
         return path, elapsed_ms
 
 
-# Test search
+class Observer:
+    def update(self, event):
+        raise NotImplementedError
+
+
+class ConsoleView(Observer):
+    def __init__(self, maze):
+        self.maze = maze
+
+    def update(self, event):
+        if event == "Поиск начат":
+            print("=== Поиск начат ===")
+        elif event == "Поиск завершён":
+            print("=== Поиск завершён ===")
+
+    def render(self, path=None):
+        path_set = set(path) if path else set()
+        for y in range(self.maze.height):
+            row = ''
+            for x in range(self.maze.width):
+                cell = self.maze.get_cell(x, y)
+                if cell.is_wall:
+                    row += '#'
+                elif cell.is_start:
+                    row += 'S'
+                elif cell.is_exit:
+                    row += 'E'
+                elif cell in path_set:
+                    row += '*'
+                else:
+                    row += ' '
+            print(row)
+        print()
+
+
+class Command:
+    def execute(self):
+        raise NotImplementedError
+
+    def undo(self):
+        raise NotImplementedError
+
+
+class MoveCommand(Command):
+    def __init__(self, player, dx, dy):
+        self.player = player
+        self.dx = dx
+        self.dy = dy
+        self.prev_x = player.x
+        self.prev_y = player.y
+
+    def execute(self):
+        new_x = self.player.x + self.dx
+        new_y = self.player.y + self.dy
+        maze = self.player.maze
+        cell = maze.get_cell(new_x, new_y)
+        if cell and cell.is_passable():
+            self.player.x = new_x
+            self.player.y = new_y
+            self.player.current_cell = cell
+            return True
+        return False
+
+    def undo(self):
+        self.player.x = self.prev_x
+        self.player.y = self.prev_y
+        self.player.current_cell = self.player.maze.get_cell(self.prev_x, self.prev_y)
+
+
+class Player:
+    def __init__(self, maze, start_cell):
+        self.maze = maze
+        self.x = start_cell.x
+        self.y = start_cell.y
+        self.current_cell = start_cell
+
+
+# EEEEEEEEEKSPERIMENTY
+def generate_empty_maze(width, height):
+    maze = Maze(width, height)
+    start = maze.get_cell(0, 0)
+    exit_cell = maze.get_cell(width-1, height-1)
+    start.is_start = True
+    exit_cell.is_exit = True
+    maze.start_cell = start
+    maze.exit_cell = exit_cell
+    return maze
+
+
+def generate_random_maze(width, height, wall_prob=0.3):
+    maze = Maze(width, height)
+    for x in range(width):
+        for y in range(height):
+            cell = maze.get_cell(x, y)
+            if random.random() < wall_prob:
+                cell.is_wall = True
+    start = maze.get_cell(0, 0)
+    exit_cell = maze.get_cell(width-1, height-1)
+    start.is_wall = False
+    start.is_start = True
+    exit_cell.is_wall = False
+    exit_cell.is_exit = True
+    maze.start_cell = start
+    maze.exit_cell = exit_cell
+    return maze
+
+
+def generate_maze_with_dead_ends(width, height):
+    maze = Maze(width, height)
+    for x in range(width):
+        for y in range(height):
+            maze.get_cell(x, y).is_wall = True
+    x, y = 0, 0
+    while x < width and y < height:
+        cell = maze.get_cell(x, y)
+        cell.is_wall = False
+        if x == width-1 and y == height-1:
+            break
+        if y+1 < height and (x == width-1 or random.choice([True, False])):
+            y += 1
+        else:
+            x += 1
+    start = maze.get_cell(0, 0)
+    exit_cell = maze.get_cell(width-1, height-1)
+    start.is_start = True
+    exit_cell.is_exit = True
+    maze.start_cell = start
+    maze.exit_cell = exit_cell
+    return maze
+
+
+def generate_maze_no_exit(width, height):
+    maze = generate_random_maze(width, height, 0.2)
+    exit_cell = maze.get_cell(width-1, height-1)
+    for dx, dy in [(-1,0), (1,0), (0,-1), (0,1)]:
+        nx, ny = exit_cell.x + dx, exit_cell.y + dy
+        neighbor = maze.get_cell(nx, ny)
+        if neighbor:
+            neighbor.is_wall = True
+    start = maze.get_cell(0, 0)
+    start.is_wall = False
+    start.is_start = True
+    maze.start_cell = start
+    maze.exit_cell = exit_cell
+    return maze
+
+
+def run_experiment():
+    os.makedirs("results", exist_ok=True)
+
+    maze_generators = [
+        ("empty_10x10", lambda: generate_empty_maze(10, 10)),
+        ("empty_50x50", lambda: generate_empty_maze(50, 50)),
+        ("empty_100x100", lambda: generate_empty_maze(100, 100)),
+        ("random_10x10", lambda: generate_random_maze(10, 10, 0.3)),
+        ("random_50x50", lambda: generate_random_maze(50, 50, 0.3)),
+        ("random_100x100", lambda: generate_random_maze(100, 100, 0.3)),
+        ("dead_ends_10x10", lambda: generate_maze_with_dead_ends(10, 10)),
+        ("dead_ends_50x50", lambda: generate_maze_with_dead_ends(50, 50)),
+        ("dead_ends_100x100", lambda: generate_maze_with_dead_ends(100, 100)),
+        ("no_exit_10x10", lambda: generate_maze_no_exit(10, 10)),
+        ("no_exit_50x50", lambda: generate_maze_no_exit(50, 50)),
+    ]
+
+    strategies = [
+        ("BFS", BFSStrategy()),
+        ("DFS", DFSStrategy()),
+        ("AStar", AStarStrategy())
+    ]
+
+    repeats = 5
+    all_results = []
+
+    for maze_name, gen_func in maze_generators:
+        print(f"Тестирование лабиринта: {maze_name}")
+        maze = gen_func()
+        solver = MazeSolver(maze)
+        for strat_name, strat in strategies:
+            solver.set_strategy(strat)
+            total_time = 0
+            total_path_len = 0
+            path = []
+            for rep in range(repeats):
+                path, elapsed_ms = solver.solve()
+                total_time += elapsed_ms
+                total_path_len += len(path) if path else 0
+            avg_time = total_time / repeats
+            avg_len = total_path_len / repeats
+            all_results.append({
+                "Maze": maze_name,
+                "Strategy": strat_name,
+                "AvgTime_ms": avg_time,
+                "AvgPathLen": avg_len,
+                "PathFound": len(path) > 0 if path else False
+            })
+            print(f"  {strat_name}: время {avg_time:.3f} мс, длина пути {avg_len:.1f}")
+
+    # Сохраняем CSV
+    csv_path = "results/experiment_results.csv"
+    with open(csv_path, 'w', newline='', encoding='utf-8') as f:
+        fieldnames = ["Maze", "Strategy", "AvgTime_ms", "AvgPathLen", "PathFound"]
+        writer = csv.DictWriter(f, fieldnames=fieldnames)
+        writer.writeheader()
+        writer.writerows(all_results)
+    print(f"Результаты сохранены в {csv_path}")
+
+    # Построение графика
+    maze_names = sorted(set(r["Maze"] for r in all_results))
+    strategy_names = ["BFS", "DFS", "AStar"]
+    data = {maze: {s: None for s in strategy_names} for maze in maze_names}
+    for r in all_results:
+        data[r["Maze"]][r["Strategy"]] = r["AvgTime_ms"]
+
+    fig, ax = plt.subplots(figsize=(14, 6))
+    x = np.arange(len(maze_names))
+    width = 0.25
+    colors = ['skyblue', 'lightgreen', 'salmon']
+
+    for i, strat in enumerate(strategy_names):
+        times = [data[maze][strat] if data[maze][strat] is not None else 0 for maze in maze_names]
+        ax.bar(x + i*width, times, width, label=strat, color=colors[i])
+
+    ax.set_xlabel('Лабиринт')
+    ax.set_ylabel('Среднее время (мс)')
+    ax.set_title('Сравнение стратегий поиска пути')
+    ax.set_xticks(x + width)
+    ax.set_xticklabels(maze_names, rotation=45, ha='right')
+    ax.legend()
+
+    plt.tight_layout()
+    plt.savefig("results/performance.png", dpi=150)
+    plt.show()
+    print("График сохранён в results/performance.png")
+
+
 if __name__ == '__main__':
-    builder = TextFileMazeBuilder()
+    run_experiment()
-    maze = builder.build_from_file('test_maze.txt')
-    solver = MazeSolver(maze)
-
-    solver.set_strategy(BFSStrategy())
-    path, ms = solver.solve()
-    print("BFS путь:", [f"({c.x},{c.y})" for c in path])
-    print(f"Время: {ms:.3f} мс")
-
-    solver.set_strategy(DFSStrategy())
-    path, ms = solver.solve()
-    print("DFS путь:", [f"({c.x},{c.y})" for c in path])
-    print(f"Время: {ms:.3f} мс")
-
-    solver.set_strategy(AStarStrategy())
-    path, ms = solver.solve()
-    print("A* путь:", [f"({c.x},{c.y})" for c in path])
-    print(f"Время: {ms:.3f} мс")

AgapovaDS/docs/data/2-nd/results/experiment_results.csv

@@ -0,0 +1,34 @@
+Maze,Strategy,AvgTime_ms,AvgPathLen,PathFound
+empty_10x10,BFS,0.13590119997388683,19.0,True
+empty_10x10,DFS,0.0658330000078422,55.0,True
+empty_10x10,AStar,0.12148100004196749,19.0,True
+empty_50x50,BFS,4.080367400092655,99.0,True
+empty_50x50,DFS,1.490334600021015,1275.0,True
+empty_50x50,AStar,4.539874399961263,99.0,True
+empty_100x100,BFS,11.864865199822816,199.0,True
+empty_100x100,DFS,6.421647800107166,4951.0,True
+empty_100x100,AStar,13.146192800104473,199.0,True
+random_10x10,BFS,0.08931020001909928,19.0,True
+random_10x10,DFS,0.0637794000795111,23.0,True
+random_10x10,AStar,0.08288600010928349,19.0,True
+random_50x50,BFS,2.3307791999286565,0.0,False
+random_50x50,DFS,2.358275200094795,0.0,False
+random_50x50,AStar,3.1945947999702184,0.0,False
+random_100x100,BFS,8.76705820001007,0.0,False
+random_100x100,DFS,8.292441200046596,0.0,False
+random_100x100,AStar,13.397702600013872,0.0,False
+dead_ends_10x10,BFS,0.023798799975338625,19.0,True
+dead_ends_10x10,DFS,0.024454199865431292,19.0,True
+dead_ends_10x10,AStar,0.02576019996922696,19.0,True
+dead_ends_50x50,BFS,0.10447879994899267,99.0,True
+dead_ends_50x50,DFS,0.1395262001096853,99.0,True
+dead_ends_50x50,AStar,0.1517965998573345,99.0,True
+dead_ends_100x100,BFS,0.27448000000731554,199.0,True
+dead_ends_100x100,DFS,0.2607183998406981,199.0,True
+dead_ends_100x100,AStar,0.42436699995960225,199.0,True
+no_exit_10x10,BFS,0.09290340003644815,0.0,False
+no_exit_10x10,DFS,0.09840180009632604,0.0,False
+no_exit_10x10,AStar,0.11763999991671881,0.0,False
+no_exit_50x50,BFS,2.5957402001040464,0.0,False
+no_exit_50x50,DFS,2.327834000061557,0.0,False
+no_exit_50x50,AStar,4.334011999981158,0.0,False