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当我没有背景时会发生这种情况： https ://www.youtube.com/watch?v=S-bv-j8le24

这是代码：

import pygame

pygame.init()

#####Variables#####

white = (255,255,255)
black = (0,0,0)
red = (255,0,0)
green = (0,255,0)
blue = (0,0,255)
gameWindowWidth = 1280
gameWindowHeight = 720
gameRunning = True
clock = pygame.time.Clock()

###################

#####Loading#####

ninja01 = pygame.image.load("C:\\Users\Tom\Desktop\gameImages\charSprite\s_Idle__000.png")
background = pygame.image.load("C:\\Users\Tom\Desktop\gameImages\Background\DistantCity\PNG\m_image.png")

#################

#####Classes#####

class player():
    def __init__(self):
        self.playerX = gameWindowWidth * 0.2
        self.playerY = gameWindowHeight * 0.8
        self.changeOnX = 0

    def changingX(self):
        if event.type == pygame.KEYDOWN and event.key == pygame.K_RIGHT:
            self.changeOnX = 5
        if event.type == pygame.KEYDOWN and event.key == pygame.K_LEFT:
            self.changeOnX = -5
        if event.type == pygame.KEYUP and event.key == pygame.K_RIGHT:
            self.changeOnX = 0
        if event.type == pygame.KEYUP and event.key == pygame.K_LEFT:
            self.changeOnX = 0

    def move(self):
        self.playerX = self.playerX + self.changeOnX

        gameWindow.blit(ninja01, (self.playerX, self.playerY))


################

ninja = player()
gameWindow = pygame.display.set_mode((gameWindowWidth, gameWindowHeight))
pygame.display.set_caption("Platformer Game")

while gameRunning == True:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            gameRunning = False


    #gameWindow.blit(background, (0, 0))
    ninja.changingX()
    ninja.move()
    pygame.display.update()
    clock.tick(144)

当我有背景时会发生这种情况： https ://www.youtube.com/watch?v=l89zZQ_8kzg

这是代码：

import pygame

pygame.init()

#####Variables#####

white = (255,255,255)
black = (0,0,0)
red = (255,0,0)
green = (0,255,0)
blue = (0,0,255)
gameWindowWidth = 1280
gameWindowHeight = 720
gameRunning = True
clock = pygame.time.Clock()

###################

#####Loading#####

ninja01 = pygame.image.load("C:\\Users\Tom\Desktop\gameImages\charSprite\s_Idle__000.png")
background = pygame.image.load("C:\\Users\Tom\Desktop\gameImages\Background\DistantCity\PNG\m_image.png")

#################

#####Classes#####

class player():
    def __init__(self):
        self.playerX = gameWindowWidth * 0.2
        self.playerY = gameWindowHeight * 0.8
        self.changeOnX = 0

    def changingX(self):
        if event.type == pygame.KEYDOWN and event.key == pygame.K_RIGHT:
            self.changeOnX = 5
        if event.type == pygame.KEYDOWN and event.key == pygame.K_LEFT:
            self.changeOnX = -5
        if event.type == pygame.KEYUP and event.key == pygame.K_RIGHT:
            self.changeOnX = 0
        if event.type == pygame.KEYUP and event.key == pygame.K_LEFT:
            self.changeOnX = 0

    def move(self):
        self.playerX = self.playerX + self.changeOnX

        gameWindow.blit(ninja01, (self.playerX, self.playerY))


################

ninja = player()
gameWindow = pygame.display.set_mode((gameWindowWidth, gameWindowHeight))
pygame.display.set_caption("Platformer Game")

while gameRunning == True:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            gameRunning = False


    gameWindow.blit(background, (0, 0))
    ninja.changingX()
    ninja.move()
    pygame.display.update()
    clock.tick(144)

该代码与“gameWindow.blit(background, (0, 0))”在第一个注释中的事实完全相同。

我的问题是为什么当我添加背景时我的角色会变得这么慢？

同样在第二个中，他的移动速度不会改变，直到我将时钟降低到 30 及以下。

4

2 回答 2

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clock.tick(144)意味着如果渲染速度快于 144 fps，则可能会暂停。而且由于这是一个足够高的帧速率，并且渲染仍然需要足够长的时间，所以可能clock.tick会立即返回并且不需要延迟。

因此，当您在背景中绘制时，渲染肯定不会更快，因此它仍然足够慢以clock.tick立即返回。除了现在渲染有点慢，所以你注意到渲染的延迟。

于 2016-12-18T17:11:27.823 回答
0

整个游戏循环的时间都由 Clock.tick 方法控制。因此，您每帧只运行一次输入和位置更新代码。你拥有的精灵越多，它就越会减慢这个循环，这是你在包含背景时所观察到的。您可以将输入和更新逻辑的时间与渲染周期分开，这将解决您的问题。考虑我在下面执行的重构：

import pygame

pygame.init()

#####Variables#####

white = (255,255,255)
black = (0,0,0)
red = (255,0,0)
green = (0,255,0)
blue = (0,0,255)
gameWindowWidth = 1280
gameWindowHeight = 720
gameRunning = True
clock = pygame.time.Clock()

###################

#####Loading#####

ninja01 = pygame.image.load("/path/to/your/ninja/sprite")
background = pygame.image.load("/path/to/your/background/sprite")

#################

#####Classes#####

class player():
    def __init__(self):
        self.playerX = gameWindowWidth * 0.2
        self.playerY = gameWindowHeight * 0.8
        self.velocity = 0.0

    def setVelocity(self, velocity):
        self.velocity = velocity

    def update(self, dt):
        self.playerX += self.velocity * dt

    def draw(self):
        gameWindow.blit(ninja01, (self.playerX, self.playerY))


################

ninja = player()
gameWindow = pygame.display.set_mode((gameWindowWidth, gameWindowHeight))
pygame.display.set_caption("Platformer Game")

fps = 60
target_frame_time = 1.0 / fps
current_frame_time = 0.0

while gameRunning == True:
    dt = clock.tick()

    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            gameRunning = False
        if event.type == pygame.KEYDOWN and event.key == pygame.K_RIGHT:
            ninja.setVelocity(1)
        if event.type == pygame.KEYDOWN and event.key == pygame.K_LEFT:
            ninja.setVelocity(-1)
        if event.type == pygame.KEYUP and event.key == pygame.K_RIGHT:
            ninja.setVelocity(0)
        if event.type == pygame.KEYUP and event.key == pygame.K_LEFT:
            ninja.setVelocity(0)

    ninja.update(dt)

    current_frame_time += dt

    if current_frame_time >= target_frame_time:
        gameWindow.blit(background, (0, 0))
        ninja.draw()

        pygame.display.flip()

        current_frame_time -= target_frame_time

在忍者上调用更新时，使用以下等式计算位置：

distance = velocity * time

通过这些代码更改，您现在可以在输入和游戏更新逻辑连续运行的同时实现一致的帧速率。

于 2016-12-18T19:05:58.430 回答