python实现吃苹果小游戏
本文实例为大家分享了python实现吃苹果小游戏的具体代码，供大家参考，具体内容如下
1.公共类模块
import pygame
from pygame.rect import Rect
def print_text(font, x, y, text, color=(255, 255, 255)):
imgText=font.render(text, True, color)
screen=pygame.display.get_surface()
screen.blit(imgText,(x, y))
class MySprite(pygame.sprite.Sprite):
def __init__(self):
pygame.sprite.Sprite.__init__(self)
self.master_image=None
self.frame = 0
self.old_frame = -1
self.frame_width = 1
self.frame_height = 1
self.first_frame = 0
self.last_frame = 0
self.columns = 0
self.last_time = 1
self.direction = 0
self.velocity = 0
def _getx(self): return self.rect.x
def _gety(self): return self.rect.y
def _setx(self, value): self.rect.x = value
def _sety(self, value): self.rect.y = value
"""
描述
property() 函数的作用是在新式类中返回属性值。
语法
以下是 property() 方法的语法:
class property([fget[, fset[, fdel[, doc]]]])
参数
fget -- 获取属性值的函数
fset -- 设置属性值的函数
fdel -- 删除属性值函数
doc -- 属性描述信息
返回值
返回新式类属性。
"""
X = property(_getx, _setx)
Y = property(_gety, _sety)
#位置属性
def _getpos(self): return self.rect.topleft
def _setpos(self, pos): self.rect.topleft = pos
position = property(_getpos, _setpos)
def load(self, filename, width, height, columns):
self.master_image=pygame.image.load(filename).convert_alpha()
self.frame_height = height
self.frame_width = width
self.rect = Rect(0, 0, width, height)
self.columns = columns
rect = self.master_image.get_rect()
self.last_frame = (rect.width//width)*(rect.height//height) - 1
def update(self, current_time, rate=30):
#跟新动画帧
if current_time > self.last_time + rate:
self.frame += 1
if self.frame > self.last_frame:
self.frame = self.first_frame
self.last_time = current_time
#仅当更改时才创建帧
if self.frame != self.old_frame:
frame_x = (self.frame % self.columns) * self.frame_width
frame_y = (self.frame // self.columns) * self.frame_height
rect=Rect(frame_x, frame_y, self.frame_width, self.frame_height)
self.image = self.master_image.subsurface(rect)
self.old_frame = self.frame
class Point(object):
def __init__(self, x, y):
self.x = x
self.y = y
def getx(self): return self.x
def gety(self): return self.y
def setx(self,value): self.x=value
def sety(self,value): self.y=value
x=property(getx,setx)
y=property(gety,sety)
def __str__(self):
return 'x:'+"{:.0f}".format(self.x) + 'y:'+"{:.0f}".format(self.y)
2.首先生成随机苹果，然后监听键盘移动，播放动画。精灵和苹果碰撞检测，检测是吃掉苹果
import pygame
from pygame.rect import Rect
from . import MyLibrary
import random
import sys
def calc_velocity(direction, vel=1.0):
velocity = MyLibrary.Point(0, 0)
if direction == 0:#上
velocity.y = -vel
elif direction == 2:#右
velocity.x = vel
elif direction == 4:#下
velocity.y == vel
elif direction == 6:#左
velocity.x == -vel
return velocity
pygame.init()
screen = pygame.display.set_mode(800,600)
font=pygame.font.Font(None, 36)
timer=pygame.time.Clock()
#创建精灵组
player_group=pygame.sprite.Group()
food_group=pygame.sprite.Group()
#初始化玩家精灵组
player=MyLibrary.MySprite()
player.load('farmer.png',96,96,8)############-----------------图片
player.position=80, 80
player.direction= 4
player_group.add(player)
#初始化food精灵组
for n in range(1, 50):
food= MyLibrary.MySprite()
food.load('food.png',35,35,1) #################-----------食物图片
food.position=random.randint(0, 780), random.randint(0, 580)
food_group.add(food)
game_over= False
player_moving = False
plyer_health = False
while True:
timer.tick(30)
ticks = pygame.time.get_ticks()
for event in pygame.event.get():
if event.type == pygame.QUIT:
pygame.quit()
sys.exit()
keys = pygame.key.get_pressed()
if keys[pygame.key.K_UP]:
player.direction=0
player_moving = True
elif keys[pygame.key.k_DOWN]:
player_moving = True
player.direction=4
elif keys[pygame.key.K_RIGHT]:
player.direction = 2
player_moving = True
elif keys[pygame.key.K_LEFT]:
player.direction = 6
player_moving = True
else:
player_moving = False
if not game_over:
# 根据不同的方向，角色移动不同的动画帧
player.first_frame = player.direction*player.columns
player.last_time = player.first_frame + player.columns -1
if player.frame < player.first_frame:
player.frame = player.first_frame
if not player_moving:
#停止更新动画帧
player.frame = player.first_frame=player.last_frame
else:
player.velocity = calc_velocity(player.direction,1.5)
player.velocity.x*=1.5
player.velocity.y*=1.5
#跟新玩家精灵组
player_group.update(ticks,50)
#移动玩家
if player_moving:
player.X += player.velocity.x
player.Y += player.velocity.y
if player.X < 0: player.X = 0
elif player.X >700: player.X =700
if player.Y < 0: player.Y = 0
elif player.Y >500:player.Y =500
#检测玩家是否与食物冲突，是否吃到苹果
attacker = None
attacker = pygame.sprite.spritecollideany(player,food_group)
if attacker != None:
if pygame.sprite.collide_circle_ratio(0.65)(player,food_group):
plyer_health += 2
food_group.remove(attacker)
if plyer_health > 100:
plyer_health=100
#跟新食物精灵组
food_group.update(ticks, 50)
if food_group.__len__() == 0:
game_over = True
screen.fill((50,50,100))
food_group.draw(screen)
player_group.draw(screen)
pygame.draw.rect(screen,(510,150,50,180),Rect(300,570,plyer_health*2,25))
pygame.draw.rect(screen, (100, 200, 100, 180), Rect(300, 570, 200, 2))
if game_over:
MyLibrary.print_text(font, 300, 100,'Game Over!')
pygame.display.update()
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