继续之前的内容，随着游戏的内容越来越复杂，有必要把代码优化一下，可以参考OOP的做法，把人物类抽象出来，弄成一个单独的类，这们便于代码维护，同时我们给小人儿，加个发射子弹的功能，代码如下：(看上去略长，但是绝大多数，都是上节的代码)
import pygame
import os pygame.init() WIN_WIDTH, WIN_HEIGHT = 500, 500 win = pygame.display.set_mode((WIN_WIDTH, WIN_HEIGHT)) # 画布窗口的大小
pygame.display.set_caption("first game") # 窗口标题 img_base_path = os.getcwd() + '/img/' bg = pygame.image.load(img_base_path + 'bg.jpg')
char = pygame.image.load(img_base_path + 'standing.png')
bullet_right = pygame.image.load(img_base_path + 'r_bullet.png')
bullet_left = pygame.image.load(img_base_path + 'l_bullet.png') clock = pygame.time.Clock() # 将主角人物抽象成1个类
class Player(object):
# 向右走的图片数组
walkRight = [pygame.image.load(img_base_path + 'actor/R1.png'),
pygame.image.load(img_base_path + 'actor/R2.png'),
pygame.image.load(img_base_path + 'actor/R3.png'),
pygame.image.load(img_base_path + 'actor/R4.png'),
pygame.image.load(img_base_path + 'actor/R5.png'),
pygame.image.load(img_base_path + 'actor/R6.png'),
pygame.image.load(img_base_path + 'actor/R7.png'),
pygame.image.load(img_base_path + 'actor/R8.png'),
pygame.image.load(img_base_path + 'actor/R9.png')] # 向左走的图片数组
walkLeft = [pygame.image.load(img_base_path + 'actor/L1.png'),
pygame.image.load(img_base_path + 'actor/L2.png'),
pygame.image.load(img_base_path + 'actor/L3.png'),
pygame.image.load(img_base_path + 'actor/L4.png'),
pygame.image.load(img_base_path + 'actor/L5.png'),
pygame.image.load(img_base_path + 'actor/L6.png'),
pygame.image.load(img_base_path + 'actor/L7.png'),
pygame.image.load(img_base_path + 'actor/L8.png'),
pygame.image.load(img_base_path + 'actor/L9.png')] def __init__(self, x, y, width, height):
self.x = x
self.y = y
self.width = width
self.height = height
self.speed = 5
self.left = False
self.right = True
self.isJump = False
self.walkCount = 0
self.t = 10
self.speed = 5 def draw(self, win):
if self.walkCount >= 27:
self.walkCount = 0 if self.left:
win.blit(self.walkLeft[self.walkCount // 3], (self.x, self.y))
self.walkCount += 1
elif self.right:
win.blit(self.walkRight[self.walkCount // 3], (self.x, self.y))
self.walkCount += 1
else:
win.blit(char, (self.x, self.y)) # 子弹类
class Bullet(object):
global man def __init__(self, x, y, radius, color, facing):
self.x = x
self.y = y
self.radius = radius
self.color = color
self.facing = facing
self.vel = 8 * facing def draw(self, win):
# 根据人物的朝向，要切换不同的子弹图片
if man.left:
win.blit(bullet_left, (self.x, self.y))
else:
win.blit(bullet_right, (self.x, self.y)) def redraw_game_window():
win.blit(bg, (0, 0))
man.draw(win)
for bullet in bullets:
bullet.draw(win)
pygame.display.update() # main
man = Player(200, 410, 64, 64)
run = True
bullets = []
while run:
clock.tick(27) for event in pygame.event.get():
if event.type == pygame.QUIT:
run = False for bullet in bullets:
if WIN_WIDTH > bullet.x > 0:
bullet.x += bullet.vel
else:
bullets.pop(bullets.index(bullet)) keys = pygame.key.get_pressed() if keys[pygame.K_SPACE]:
if man.left:
facing = -1
else:
facing = 1 if len(bullets) < 5:
# 子弹不足5个时，自动填充
bullets.append(Bullet(round(man.x + man.width // 2), round(man.y + man.height // 2), 6, (0, 0, 0), facing)) if keys[pygame.K_LEFT] and man.x > 0:
man.x -= man.speed
man.left = True
man.right = False
elif keys[pygame.K_RIGHT] and man.x < win.get_size()[0] - man.width:
man.x += man.speed
man.left = False
man.right = True
else:
man.walkCount = 0 # 方向箭头响应
if not man.isJump:
if keys[pygame.K_UP]:
man.isJump = True
man.walkCount = 0
else:
if man.t >= -10:
a = 1 # 前半段减速上跳
if man.t < 0:
a = -1 # 后半段加速下落
man.y -= 0.5 * a * (man.t ** 2) # 匀加速直线运动的位移公式 man.t -= 1
else:
man.isJump = False
man.t = 10 redraw_game_window() pygame.quit()
效果：