如何使用 PyGame 计时器事件?如何使用计时器向 pygame 屏幕添加时钟? [英] How do I use a PyGame timer event? How to add a clock to a pygame screen using a timer?

问题描述

我是 Python 新手，因此决定尝试在 pygame 中制作一个简单的游戏.我想添加一个计时器/时钟来显示你玩过/幸存了多久"，所以基本上创建了一个时钟.

但是，我四处搜索并获得了 time.sleep(1) 函数，它确实可以用作时钟，但它使游戏的其他所有内容减慢到几乎没有的程度移动.

有没有一种简单的方法可以在游戏屏幕上添加时钟?

解决方案

pygame.init() 之后的毫秒数可以通过

导入pygamepygame.init()窗口 = pygame.display.set_mode((200, 200))时钟 = pygame.time.Clock()font = pygame.font.SysFont(None, 100)计数器 = 0text = font.render(str(counter), True, (0, 128, 0))时间延迟 = 1000timer_event = pygame.USEREVENT+1pygame.time.set_timer(timer_event, time_delay)# 主应用程序循环运行 = 真运行时:时钟滴答(60)# 事件循环对于 pygame.event.get() 中的事件:如果 event.type == pygame.QUIT:运行 = 错误elif event.type == timer_event:# 重新创建文本计数器 += 1text = font.render(str(counter), True, (0, 128, 0))# 清除显示window.fill((255, 255, 255))# 绘制场景text_rect = text.get_rect(center = window.get_rect().center)window.blit(文本，text_rect)# 更新显示pygame.display.flip()

I'm new to python and therefore decided to try to make a simple game in pygame. I want to add a timer/clock that shows how long "you have played/survived", so creating a clock basically.

However, I've searched around and gotten the time.sleep(1) function and it does indeed work as a clock, but it slows down everything else of the game to the point it barely moves.

Is there a simple way to add a clock to the gamescreen?

解决方案

The number of milliseconds since pygame.init() can be retrieved by pygame.time.get_ticks(). See pygame.time module.

---

Furthermore in pygame exists a timer event. Use pygame.time.set_timer() to repeatedly create an USEREVENT. e.g.:

time_delay = 500 # 0.5 seconds
timer_event = pygame.USEREVENT + 1
pygame.time.set_timer(timer_event , time_delay )

Note, in pygame customer events can be defined. Each event needs a unique id. The ids for the user events have to start at pygame.USEREVENT. In this case pygame.USEREVENT+1 is the event id for the timer event.

Receive the event in the event loop:

running = True
while running:

    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False

         elif event.type == timer_event:
             # [...]

The timer event can be stopped by passing 0 to the time parameter.

---

See the example:

import pygame

pygame.init()
window = pygame.display.set_mode((200, 200))
clock = pygame.time.Clock()
font = pygame.font.SysFont(None, 100)

counter = 0
text = font.render(str(counter), True, (0, 128, 0))

time_delay = 1000
timer_event = pygame.USEREVENT+1
pygame.time.set_timer(timer_event, time_delay)

# main application loop
run = True
while run:
    clock.tick(60)

    # event loop
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            run = False
        elif event.type == timer_event:
            # recreate text
            counter += 1
            text = font.render(str(counter), True, (0, 128, 0))

    # clear the display
    window.fill((255, 255, 255))

    # draw the scene
    text_rect = text.get_rect(center = window.get_rect().center)   
    window.blit(text, text_rect)

    # update the display
    pygame.display.flip()

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