光标移动时如何保持相同的帧速率？答案

【问题标题】：how do you keep the same frame-rate when cursor moves?光标移动时如何保持相同的帧速率？
【发布时间】：2021-10-18 15:24:34
【问题描述】：

    import pygame, sys, time

win = pygame.display.set_mode((750, 750))

PlayerX = 375
PlayerY = 375
helloX = 10
helloY = 10


playerScale = 50

Player = pygame.image.load("player.png")
Player = pygame.transform.scale(Player, (playerScale, playerScale))
clock = pygame.time.Clock()

while 1:
    for event in pygame.event.get():
        keys = pygame.key.get_pressed()
        if keys[pygame.K_q]:
            sys.exit
        if keys[pygame.K_a]:
            PlayerX -= 1
        if keys[pygame.K_d]:
            PlayerX += 1
        if keys[pygame.K_s]:
            PlayerY += 1
        if keys[pygame.K_w]:
            PlayerY -= 1
        if keys[pygame.K_t]:
            playerScale *= 2
            Player = pygame.transform.scale(Player, (playerScale, playerScale))
        if keys[pygame.K_y]:
            playerScale /= 2
            Player = pygame.transform.scale(Player, (playerScale, playerScale))
    def drawScreen():
        win.fill((48, 101, 13))
        win.blit(Player, (PlayerX, PlayerY))
        pygame.display.update()
    drawScreen()
    pygame.display.flip()
    clock.tick(120)

对于某些人来说，当你在这个程序中移动鼠标时，fps 会增加，这会使角色移动得更快。那么你如何解决它，以及如何让角色以相同的速度移动，而不管 fps 是多少？感谢您提供帮助。

【问题讨论】：

标签： python pygame mouse frame-rate

【解决方案1】：

pygame.key.get_pressed() 不是事件！

pygame.key.get_pressed() 返回一个包含每个键状态的列表。如果按住某个键，则该键的状态为True，否则为False。使用pygame.key.get_pressed() 评估按钮的当前状态并获得连续移动。见How can I make a sprite move when key is held down。

键盘事件（参见pygame.event 模块）仅在按键状态更改时发生一次。每次按下某个键时，KEYDOWN 事件就会发生一次。每次释放键时，KEYUP 发生一次。将键盘事件用于单个操作或逐步移动。

while 1:
    for event in pygame.event.get():
        if event.type == KEYDOWN:
            if event.key == pygame.K_t:
                playerScale *= 2
                Player = pygame.transform.scale(Player, (playerScale, playerScale))
            if event.key == pygame.K_y:
                playerScale /= 2
                Player = pygame.transform.scale(Player, (playerScale, playerScale))

    keys = pygame.key.get_pressed()
    if keys[pygame.K_q]:
        sys.exit
    if keys[pygame.K_a]:
        PlayerX -= 1
    if keys[pygame.K_d]:
        PlayerX += 1
    if keys[pygame.K_s]:
        PlayerY += 1
    if keys[pygame.K_w]:
        PlayerY -= 1

    # [...]

【讨论】：