python - 如何在pygame中移动ASCII字符？

Question

我正在开发一款类似 rogue-like 的 ASCII 游戏。我想打印 @ 作为播放器并用箭头移动它。我尝试的一切都不起作用。

import sys, pygame
pygame.init()
pygame.font.init()

white = (255, 255, 255) 
green = (0, 255, 0) 
blue = (0, 0, 128) 
black = (0, 0, 0)

playerposx = 356
playerposy = 254
playerpos = (playerposx, playerposy)
playervel = 16

win = pygame.display.set_mode((720,516))

pygame.display.flip()
pygame.display.set_caption('Tiles')
font = pygame.font.SysFont("timesnewroman", 16)
text = font.render('@', True, white, blue)
pygame.display.flip()


run = True
while run:
    pygame.time.delay(100)

    win.fill((0,0,0))
    win.blit(text, playerpos)
    pygame.display.update()

    keys = pygame.key.get_pressed()

    if keys[pygame.K_LEFT]:
        playerposx -= playervel
        print("LEFT")

    if keys[pygame.K_RIGHT]:
        playerposx += playervel
        print("RIGHT")

    if keys[pygame.K_UP]:
        playerposy -= playervel
        print("UP")

    if keys[pygame.K_DOWN]:
        playerposy += playervel
        print("DOWN")

    pygame.display.update()

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


pygame.quit()

Answer 1

你很接近，但你错过了更新 playerpos:

playerpos = (playerposx, playerposy)
win.blit(text, playerpos)

请注意，当按下按钮时，playerposx 和 playerposy 会发生变化，但 playerpos 永远不会更新。

进一步注意，1 pygame.display.update()足够了。移动延迟，因为 pygame.key.get_pressed()在 pygame.event.get() 之前调用. pygame.key.get_pressed() 返回的状态在 pygame.event.get() 处理事件时进行评估，因此您可以从前一帧。

像这样改变主循环:

run = True
while run:

    pygame.time.delay(100)
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            run = False

    keys = pygame.key.get_pressed()

    if keys[pygame.K_LEFT]:
        playerposx -= playervel
        print("LEFT")
    if keys[pygame.K_RIGHT]:
        playerposx += playervel
        print("RIGHT")
    if keys[pygame.K_UP]:
        playerposy -= playervel
        print("UP")
    if keys[pygame.K_DOWN]:
        playerposy += playervel
        print("DOWN")

    playerpos = (playerposx, playerposy)

    win.fill((0,0,0))
    win.blit(text, playerpos)
    pygame.display.update()