x01.AntWorld: An Python AI Game
1. 学习了一下 AI 五子棋，顺手改作 19 路的棋盘，便于围棋通用。render.py 主要修改如下：
# 常量部分：
IMAGE_PATH = 'img/'
StoneSize = 32
WIDTH = 650
HEIGHT = 732
ColSize = 33
RowSize = 34.44
H_Pad = (HEIGHT- RowSize * 19) / 2 + (RowSize - StoneSize) / 2 + 1
W_Pad = (WIDTH - ColSize * 19) / 2 + (ColSize - StoneSize) / 2 + 1
Pad = ColSize - StoneSize, RowSize - StoneSize
PIECE = StoneSize
# 坐标转换部分：
def coordinate_transform_map2pixel(self, i, j):
# 从 chessMap 里的逻辑坐标到 UI 上的绘制坐标的转换
return j * (PIECE+Pad[0]) + W_Pad, i * (PIECE+Pad[1]) + H_Pad
def coordinate_transform_pixel2map(self, x, y):
# 从 UI 上的绘制坐标到 chessMap 里的逻辑坐标的转换
i , j = int((y-H_Pad) / (PIECE+Pad[1])), int((x-W_Pad) / (PIECE+Pad[0]))
if i < 0 or i >= N or j < 0 or j >= N:
return None, None
else:
return i, j
2. 发现 pygame 还不错，便从网上搜索到《Beginning Game Development With PYTHON And Pygame》，其中蚂蚁游戏的 AI 表现甚好，主要代码如下：
import pygame
from pygame.locals import *
from random import randint
from core.vector2d import Vector2D
ScreenSize = (640, 480)
NestLocation = (320, 240)
AntCount = 20
NestSize = 100.0
ImgPath = "img/"
class State(object):
def __init__(self, name):
self.name = name
def do_actions(self):
pass
def check_conditions(self):
pass
def entry_actions(self):
pass
def exit_actions(self):
pass
class StateMachine(object):
def __init__(self):
self.states = {}
self.active_state = None
def add_state(self, state):
self.states[state.name] = state
def think(self):
if self.active_state is None:
return
self.active_state.do_actions()
new_state_name = self.active_state.check_conditions()
if new_state_name is not None:
self.set_state(new_state_name)
def set_state(self, new_state_name):
if self.active_state is not None:
self.active_state.exit_actions()
self.active_state = self.states[new_state_name]
self.active_state.entry_actions()
class World(object):
def __init__(self):
self.entities = {}
self.entity_id = 0
self.background = pygame.surface.Surface(ScreenSize).convert()
self.background.fill((255,255,255))
pygame.draw.circle(self.background, (200,255,200), NestLocation, int(NestSize))
def add_entity(self, entity):
self.entities[self.entity_id] = entity
entity.id = self.entity_id
self.entity_id += 1
def remove_entity(self, entity):
del self.entities[entity.id]
def get(self, entity_id):
if entity_id in self.entities:
return self.entities[entity_id]
else:
return None
def process(self, time_passed):
time_passed_seconds = time_passed / 1000.0
entities = list(self.entities.values())
for entity in entities:
entity.process(time_passed_seconds)
def render(self, surface):
surface.blit(self.background, (0,0))
for entity in self.entities.values():
entity.render(surface)
def [url=http://www.cppentry.com/list.php?fid=77]PYTHON[/url]t_close_entity(self, name, location, range=100.0):
location = Vector2D(*location)
for entity in self.entities.values():
if entity.name == name:
distance = location.get_distance_to(entity.location)
if distance < range:
return entity
return None
class GameEntity(object):
def __init__(self, world, name, image):
self.world = world
self.name = name
self.image = image
self.location = Vector2D(0, 0)
self.destination = Vector2D(0, 0)
self.speed = 0
self.brain = StateMachine()
self.id = 0
def render(self, surface):
x,y = self.location
w,h = self.image.get_size()
surface.blit(self.image, (x-w/2, y-h/2))
def process(self, time_passed):
self.brain.think()
if self.speed > 0 and self.location != self.destination:
vec_to_destination = self.destination - self.location
distance_to_destination = vec_to_destination.get_length()
heading = vec_to_destination.get_normalized()
travel_distance = min(distance_to_destination, time_passed * self.speed)
self.location += travel_distance * heading
class Leaf(GameEntity):
def __init__(self, world, image):
GameEntity.__init__(self, world, "leaf", image)
class Spider(GameEntity):
def __init__(self, world, image):
GameEntity.__init__(self, world, "spider", image)
self.dead_image = pygame.transform.flip(image, 0, 1)
self.health = 25
self.speed = 50.0 + randint(-20,20)
def bitten(self):
self.health -= 1
if self.health <= 0:
self.speed = 0
self.image = self.dead_image
self.speed = 140
def render(self, surface):
GameEntity.render(self, surface)
x,y = self.location
w,h = self.image.get_size()
bar_x = x - 12
bar_y = y + h/2
surface.fill((255,0,0), (bar_x, bar_y, 25, 4))
surface.fill((0,255,0), (bar_x, bar_y, self.health, 4))
def process(self, time_passed):
x,y = self.location
if x > ScreenSize[0] + 2:
self.world.remove_entity(self)
return
GameEntity.process(self, time_passed)
class Ant(GameEntity):
def __init__(self, world, image):
GameEntity.__init__(self, world, "ant", image)
exploring_state = AntStateExploring(self)
seeking_state = AntStateSeeking(self)
delivering_state = AntStateDelivering(self)
hunting_state = AntStateHunting(self)
self.brain.add_state(exploring_state)
self.brain.add_state(seeking_state)
self.brain.add_state(delivering_state)
self.brain.add_state(hunting_state)
self.carry_image = None
def carry(self, image):
self.carry_image = image
def drop(self, surface):
if self.carry_image:
x,y = self.location
w,h = self.carry_image.get_size()
surface.blit(self.carry_image, (x-w, y-h/2))
self.carry_image = None
def render(self, surface):
GameEntity.render(self, surface)
if self.carry_image:
x,y = self.location
w,h = self.carry_image.get_size()
surface.blit(self.carry_image, (x-w, y-h/2))
class AntStateExploring(State):
def __init__(self, ant):
State.__init__(self, "exploring")
self.ant = ant
def random_destination(self):
w,h = ScreenSize
self.ant.destination = Vector2D(randint(0, w), randint(0, h))
def do_actions(self):
if randint(1,20) == 1:
self.random_destination()
def check_conditions(self):
leaf = self.ant.world. [url=http://www.cppentry.com/list.php?fid=77]PYTHON[/url]t_close_entity("leaf", self.ant.location)
if leaf is not None:
self.ant.leaf_id = leaf.id
return "seeking"
spider = self.ant.world. [url=http://www.cppentry.com/list.php?fid=77]PYTHON[/url]t_close_entity("spider", NestLocation, NestSize)
if spider is not None:
if self.ant.location.get_distance_to(spider.location) < 100:
self.ant.spider_id = spider.id
return "hunting"
return None
def entry_actions(self):
self.ant.speed = 120 + randint(-30, 30)
self.random_destination()
class AntStateSeeking(State):
def __init__(self, ant):
State.__init__(self, "seeking")
self.ant = ant
self.leaf_id = None
def check_conditions(self):
leaf = self.ant.world.get(self.ant.leaf_id)
if leaf is None:
return "exploring"
if self.ant.location.get_distance_to(leaf.location) < 5:
self.ant.carry(leaf.image)
self.ant.world.remove_entity(leaf)
return "delivering"
return None
def entry_actions(self):
leaf = self.ant.world.get(self.ant.leaf_id)
if leaf is not None:
self.ant.destination = leaf.location
self.ant.speed = 160 + randint(-20,20)
class AntStateDelivering(State):
def __init__(self, ant):
State.__init__(self, "delivering")
self.ant = ant
def check_conditions(self):
if Vector2D(*NestLocation).get_distance_to(self.ant.location) < NestSize:
if randint(1, 10) == 1:
self.ant.drop(self.ant.world.background)
return "exploring"
return None
def entry_actions(self):
self.ant.speed = 60
random_offset = Vector2D(randint(-20,20), randint(-20,20))
self.ant.destination = Vector2D(*NestLocation) + random_offset
class AntStateHunting(State):
def __init__(self, ant):
State.__init__(self, "hunting")
self.ant = ant
self. [url=http://www.cppentry.com/list.php?fid=77]PYTHON[/url]t_kill = False
def do_actions(self):
spider = self.ant.world.get(self.ant.spider_id)
if spider is None:
return
self.ant.destination = spider.location
if self.ant.location.get_distance_to(spider.location) < 15:
if randint(1,5) == 1:
spider.bitten()
if spider.health <= 0:
self.ant.carry(spider.image)
self.ant.world.remove_entity(spider)
self. [url=http://www.cppentry.com/list.php?fid=77]PYTHON[/url]t_kill = True
def check_conditions(self):
if self. [url=http://www.cppentry.com/list.php?fid=77]PYTHON[/url]t_kill:
return "delivering"
spider = self.ant.world.get(self.ant.spider_id)
if spider is None:
return "exploring"
if spider.location.get_distance_to(NestLocation) > NestSize * 3:
return "exploring"
return None
def entry_actions(self):
self.speed = 160 + randint(0,50)
def exit_actions(self):
self. [url=http://www.cppentry.com/list.php?fid=77]PYTHON[/url]t_kill = False
def run():
pygame.init()
screen = pygame.display.set_mode(ScreenSize, 0, 32)
world = World()
w,h = ScreenSize
clock = pygame.time.Clock()
ant_image = pygame.image.load(ImgPath + "ant.png").convert_alpha()
leaf_image = pygame.image.load(ImgPath + "leaf.png").convert_alpha()
spider_image = pygame.image.load(ImgPath + "spider.png").convert_alpha()
for ant_nr in range(AntCount):
ant = Ant(world, ant_image)
ant.location = Vector2D(randint(0,w), randint(0,h))
ant.brain.set_state("exploring")
world.add_entity(ant)
while True:
for e in pygame.event.get():
if e.type == QUIT:
return
time_passed = clock.tick(30)
if randint(1,10) == 1:
leaf = Leaf(world, leaf_image)
leaf.location = Vector2D(randint(0,w), randint(0,h))
world.add_entity(leaf)
if randint(1,100) == 1:
spider = Spider(world, spider_image)
spider.location = Vector2D(-50, randint(0,h))
spider.destination = Vector2D(w+50, randint(0,h))
world.add_entity(spider)
world.process(time_passed)
world.render(screen)
pygame.display.update()
antworld.py
运行效果图如下：
完整源代码下载：http://download.csdn.net/download/china_x01/10125074
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