上二节，已经知道如何控制基本的运动了，但是只有一个很单调的方块，不太美观，本节学习如何加载背景图，以及角色的动画。
素材准备：（原自github）
角色动画的原理：动画都是一帧帧渲染的，比如向左走的动画，实际是类似上图中的L1.png~L9png 连续切换，由于肉眼视觉暂留的作用，所以看上去象连续的动画。
好了，直接上代码：（关键地方已经加了注释）
import pygame
import os pygame.init() WIN_WIDTH, WIN_HEIGHT = 640, 480
FRAME_PER_SECONDS = 27 # 每秒最大帧数 win = pygame.display.set_mode((WIN_WIDTH, WIN_HEIGHT))
pygame.display.set_caption("first game") img_base_path = os.getcwd() + '/img/' # 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')] # 背景
bg = pygame.image.load(img_base_path + 'bg.jpg') # 站立时的图片
char = pygame.image.load(img_base_path + 'standing.png') x, y = 50, 350 # 起点
width, height = 64, 64 # 宽，高
speed = 5 # 速度 run = True
isJump, left, right = False, False, False
t = 10 walkCount = 0 clock = pygame.time.Clock() def redrawGameWindow():
global walkCount
win.blit(bg, (0, 0)) if walkCount >= FRAME_PER_SECONDS:
walkCount = 0 if left:
# 切换向左走的图片
win.blit(walkLeft[walkCount % 9], (x, y))
walkCount += 1
elif right:
# 切换向右走的图片
win.blit(walkRight[walkCount % 9], (x, y))
walkCount += 1
else:
win.blit(char, (x, y)) pygame.display.update() while run:
clock.tick(FRAME_PER_SECONDS) for event in pygame.event.get():
if event.type == pygame.QUIT:
run = False keys = pygame.key.get_pressed() if keys[pygame.K_LEFT] and x > 0:
x -= speed
left = True
right = False
elif keys[pygame.K_RIGHT] and x < win.get_size()[0] - width:
x += speed
left = False
right = True
else:
left = False
right = False
walkCount = 0 if not isJump:
if keys[pygame.K_SPACE]:
isJump = True
right = False
left = False
walkCount = 0
else:
if t >= -10:
a = 1
if t < 0:
a = -1
y -= 0.5 * a * (t ** 2) t -= 1
else:
isJump = False
t = 10 redrawGameWindow() pygame.quit()
怎么样，现在看上去，有点象那么回事儿了吧~_^
参考：
https://www.youtube.com/watch?v=UdsNBIzsmlI