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maze_env2.py
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"""
Reinforcement learning maze example.
Red rectangle: explorer.
Black rectangles: hells [reward = -100].
Yellow bin circle: paradise [reward = +100].
All other states: ground [reward = -1].
This script is the environment part of this example. The RL is in RL_brain.py.
View more on my tutorial page: https://morvanzhou.github.io/tutorials/
"""
import numpy as np
import time
import sys
if sys.version_info.major == 2:
import Tkinter as tk
else:
import tkinter as tk
UNIT = 100 # 单元长宽
MAZE_H = 5 # 格子长度数目
MAZE_W = 5 # 格子宽度数目
class Maze(tk.Tk, object):
def __init__(self):
super(Maze, self).__init__()
self.action_space = ['u', 'd', 'l', 'r']
self.n_actions = len(self.action_space)
self.title('maze')
self.geometry('{0}x{1}'.format(MAZE_H * UNIT, MAZE_H * UNIT)) # 窗口大小
self._build_maze()
self.n_features = 4
self.zuobiao = [50, 150, 250, 350, 450]
def _build_maze(self):
self.canvas = tk.Canvas(self, bg='white', # 画布
height=MAZE_H * UNIT,
width=MAZE_W * UNIT)
# 网格
for c in range(0, MAZE_W * UNIT, UNIT):
x0, y0, x1, y1 = c, 0, c, MAZE_H * UNIT
self.canvas.create_line(x0, y0, x1, y1)
for r in range(0, MAZE_H * UNIT, UNIT):
x0, y0, x1, y1 = 0, r, MAZE_W * UNIT, r
self.canvas.create_line(x0, y0, x1, y1)
# create origin
origin = np.array([50, 50])
# 陷阱
hell1_center = origin + np.array([UNIT * 3, 0])
self.hell1 = self.canvas.create_rectangle(
hell1_center[0] - 40, hell1_center[1] - 40,
hell1_center[0] + 40, hell1_center[1] + 40,
fill='black')
# hell
hell2_center = origin + np.array([UNIT * 3, UNIT])
self.hell2 = self.canvas.create_rectangle(
hell2_center[0] - 40, hell2_center[1] - 40,
hell2_center[0] + 40, hell2_center[1] + 40,
fill='black')
# hell
hell3_center = origin + np.array([0, UNIT * 2])
self.hell3 = self.canvas.create_rectangle(
hell3_center[0] - 40, hell3_center[1] - 40,
hell3_center[0] + 40, hell3_center[1] + 40,
fill='black')
# hell
hell4_center = origin + np.array([UNIT, UNIT * 2])
self.hell4 = self.canvas.create_rectangle(
hell4_center[0] - 40, hell4_center[1] - 40,
hell4_center[0] + 40, hell4_center[1] + 40,
fill='black')
# hell
hell5_center = origin + np.array([UNIT * 2, UNIT * 4])
self.hell5 = self.canvas.create_rectangle(
hell5_center[0] - 40, hell5_center[1] - 40,
hell5_center[0] + 40, hell5_center[1] + 40,
fill='black')
# hell
hell6_center = origin + np.array([UNIT * 3, UNIT * 4])
self.hell6 = self.canvas.create_rectangle(
hell6_center[0] - 40, hell6_center[1] - 40,
hell6_center[0] + 40, hell6_center[1] + 40,
fill='black')
# hell
hell7_center = origin + np.array([UNIT * 4, UNIT * 4])
self.hell7 = self.canvas.create_rectangle(
hell7_center[0] - 40, hell7_center[1] - 40,
hell7_center[0] + 40, hell7_center[1] + 40,
fill='black')
# 奖励点
oval_center = origin + np.array([UNIT * 4, UNIT * 2])
self.oval = self.canvas.create_oval(
oval_center[0] - 40, oval_center[1] - 40,
oval_center[0] + 40, oval_center[1] + 40,
fill='yellow')
# create 玩家
self.rect = self.canvas.create_rectangle(
origin[0] - 40, origin[1] - 40,
origin[0] + 40, origin[1] + 40,
fill='red')
# pack all
self.canvas.pack()
def reset(self):
self.update()
time.sleep(0.1)
self.canvas.delete(self.rect)
origin = np.array([50, 50])
self.rect = self.canvas.create_rectangle(
origin[0] - 40, origin[1] - 40,
origin[0] + 40, origin[1] + 40,
fill='red')
# return observation
return self.canvas.coords(self.rect)
# return (np.array(self.canvas.coords(self.rect)[:2]) - np.array(self.canvas.coords(self.oval)[:2])) / (
# MAZE_H * UNIT)
def step(self, action):
s = self.canvas.coords(self.rect)
base_action = np.array([0, 0])
if action == 0: # up
if s[1] > UNIT:
base_action[1] -= UNIT
elif action == 1: # down
if s[1] < (MAZE_H - 1) * UNIT:
base_action[1] += UNIT
elif action == 2: # right
if s[0] < (MAZE_W - 1) * UNIT:
base_action[0] += UNIT
elif action == 3: # left
if s[0] > UNIT:
base_action[0] -= UNIT
self.canvas.move(self.rect, base_action[0], base_action[1]) # 移动玩家
s_ = self.canvas.coords(self.rect) # 下一个状态
# reward function
if s_ == self.canvas.coords(self.oval):
reward = 1
done = True
print("成功")
# 是否掉入黑色
elif s_ in [self.canvas.coords(self.hell1), # [310,10,390,90]
self.canvas.coords(self.hell2), # [310,110,390,190]
self.canvas.coords(self.hell3), # [10,210,90,290]
self.canvas.coords(self.hell4), # [110,210,90,190]
self.canvas.coords(self.hell5), # [210,410,290,490]
self.canvas.coords(self.hell6), # [310,410,390,490]
self.canvas.coords(self.hell7)]: # [410,410,490,490]
reward = -1 # reward
done = True
print("失败")
else:
reward = 0
done = False
# print("继续")
s_ = self.canvas.coords(self.rect)
return s_, reward, done
def render(self):
# time.sleep(0.1)
self.update()
# def update():
# for t in range(10):
# s = env.reset()
# while True:
# env.render()
# a = 1
# s, r, done = env.step(a)
# if done:
# break
# if __name__ == '__main__':
# env = Maze()
# env.after(100, update)
# env.mainloop()