python - python pygame如何合并循环？

Question

我拍了一张吃豆人的照片，并试图让它在屏幕上向右移动。到目前为止，这是我的代码。我有 Pacman 绘图，但它有许多形状组合在一起，我不知道如何一次移动所有形状。

import os
os.environ['SDL_VIDEO_WINDOW_POS'] = "%d, %d" %(20, 20)
import pygame
pygame.init()
BLACK = (0,0,0)
YELLOW = (255, 245, 59)
WHITE = (242, 242, 242)   
SIZE = (500, 500)                
screen = pygame.display.set_mode(SIZE)

# Fill background
pygame.draw.rect(screen, WHITE, (0,0, 500, 500))
pygame.draw.circle(screen, YELLOW, (250,250), 100,)
pygame.draw.circle(screen, BLACK, (250,250), 100, 3)
pygame.draw.circle(screen, BLACK, (260,200), 10,)
pygame.draw.polygon(screen, WHITE, ((250,250),(500,500),(500,100)))
pygame.draw.line(screen, BLACK, (250, 250), (334, 198), 3)
pygame.draw.line(screen, BLACK, (250, 250), (315, 318), 3)     
pygame.display.flip()
pygame.time.wait(5000)

标签： pythonpygame

Answer 1

您必须添加一个应用程序循环。主应用程序循环必须：

• 通过pygame.event.pump()或处理事件pygame.event.get()。
• 根据输入事件和时间（分别为帧）更新对象的游戏状态和位置
• 清除整个显示或绘制背景
• 绘制整个场景（绘制 pacman）
• 通过pygame.display.update()或更新显示pygame.display.flip()

clock = pygame.time.Clock()
run = True
while run:
    clock.tick(60)

    # event loop
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            run = False

    # update position
    # [...] 

    # clear the display
    screen.fill(WHITE)

    # draw the scene   
    pacman(px, py, dir_x) 

    # update the display
    pygame.display.flip()

此外，您必须相对于位置 ( x, y) 和方向 ( dir_x) 绘制 pacman。请参阅示例：

import pygame
pygame.init()

BLACK = (0,0,0)
YELLOW = (255, 245, 59)
WHITE = (242, 242, 242)
SIZE = (500, 500)

screen = pygame.display.set_mode(SIZE)

def pacman(x, y, dir_x):
    sign_x = -1 if dir_x < 0 else 1  
    pygame.draw.circle(screen, YELLOW, (x, y), 100,)
    pygame.draw.circle(screen, BLACK, (x, y), 100, 3)
    pygame.draw.circle(screen, BLACK, (x+10*sign_x, y-50), 10,)
    pygame.draw.polygon(screen, WHITE, ((x, y),(x+250*sign_x, y+250),(x+250*sign_x, y-150)))
    pygame.draw.line(screen, BLACK, (x, y), (x+84*sign_x, y-52), 3)
    pygame.draw.line(screen, BLACK, (x, y), (x+65*sign_x, y+68), 3)     


px, py, dir_x = 250, 250, 1 

clock = pygame.time.Clock()
run = True
while run:
    clock.tick(60)

    # event loop
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            run = False

    px += dir_x
    if px > 300 or px < 200:
         dir_x *= -1

    # clear the display
    screen.fill(WHITE)

    # draw the scene   
    pacman(px, py, dir_x) 

    # update the display
    pygame.display.flip()