Pyglet游戏运动滞后

Question

所以，我的蛇连续运动，但是如果我按任何键，它会及时返回并向前和向前延迟。这是一段视频：https://youtu.be/KCesu5bGiS8

我的猜测是更快地更新键输入，但是当我这样做时，所有内容都会更快地更新，因此蛇的速度更快等等。

代码（按照文本形式的要求）：

import pyglet
import random

pyglet.resource.path = ["resources"]
pyglet.resource.reindex()
# sets the resource path


class Snake_Window(pyglet.window.Window):

    a = 0
    dtx = 160
    dty = 200
    # sets the basic direction and snake body x and y

    def __init__(self):
        super(Snake_Window, self).__init__(width=1280, height=720)
        # sets resolution and inherits

        self.key_handler = pyglet.window.key.KeyStateHandler()
        self.push_handlers(self.key_handler)
        # sets keys

        self.set_caption("Wild Snake")
        # gives it a name

        self.background_image = pyglet.resource.image("background.png")
        self.food_image = pyglet.resource.image("food.png")
        self.snake_head_image = pyglet.resource.image("snake_head.png")
        self.snake_body_image = pyglet.resource.image("snake_body.png")
        # makes images usable

        self.center_image(self.food_image)
        self.center_image(self.snake_head_image)
        self.center_image(self.snake_body_image)
        # centers the images using center_image

        self.snake_head = pyglet.sprite.Sprite(img=self.snake_head_image, x=200, y=200)
        self.snake_head.scale = 0.1
        self.snake_head.rotation = 270
        # sets snake_head as a image on screen

        self.snake_body = pyglet.sprite.Sprite(img=self.snake_body_image, x=self.dtx, y=self.dty)
        self.snake_body.scale = 0.1
        self.snake_body.rotation = 90
        # sets snake_body as a image on screen

        self.background = pyglet.sprite.Sprite(img=self.background_image, x=0, y=0)
        # sets background as a image on screen

        self.food = []
        # sets food

        pyglet.clock.schedule_interval(self.game_tick, 0.1)

    def center_image(self, image):
        # sets the center of the image to the actual center
        image.anchor_x = image.width / 2
        image.anchor_y = image.height / 2

    def update_snake_head(self):
        # makes the snake head go and sets the x and y for the body
        if self.a == 0:
            self.snake_head.x += 40
            self.dtx = self.snake_head.x - 40
            self.dty = self.snake_head.y
        elif self.a == 1:
            self.snake_head.x -= 40
            self.dtx = self.snake_head.x + 40
            self.dty = self.snake_head.y
        elif self.a == 2:
            self.snake_head.y += 40
            self.dty = self.snake_head.y - 40
            self.dtx = self.snake_head.x
        elif self.a == 3:
            self.snake_head.y -= 40
            self.dty = self.snake_head.y + 40
            self.dtx = self.snake_head.x

    def update_snake_body(self, dtx, dty):
        # makes the snakes body go
        self.snake_body.x = dtx
        self.snake_body.y = dty

    def game_tick(self, dt):
        # updates snakes head, snakes body, key presses and sets the background
        self.update_snake_head()
        self.update_snake_body(self.dtx, self.dty)
        self.draw_elements()
        self.key_press()
        print(dt)

    def draw_elements(self):
        # draws everything in window
        self.clear()
        self.background.draw()
        self.snake_head.draw()
        self.snake_body.draw()

    def key_press(self):
        # sets direction of snake upon key press and rotates his head accordingly
        if self.key_handler[pyglet.window.key.RIGHT]:
            if self.a == 1:
                pass
            else:
                self.a = 0
                self.snake_head.rotation = 270
        elif self.key_handler[pyglet.window.key.LEFT]:
            if self.a == 0:
                pass
            else:
                self.a = 1
                self.snake_head.rotation = 90
        elif self.key_handler[pyglet.window.key.UP]:
            if self.a == 3:
                pass
            else:
                self.a = 2
                self.snake_head.rotation = 180
        elif self.key_handler[pyglet.window.key.DOWN]:
            if self.a == 2:
                pass
            else:
                self.a = 3
                self.snake_head.rotation = 0


game_window = Snake_Window()

pyglet.app.run()

Answer 1

将我的所有评论转换为答案。它不会完全解决您的问题。但由于时间不够，我会留下一些有用的东西，至少几乎可以解决它。

这些的原因是一对。其中之一是您使用调度程序来渲染内容而不是使用内置的on_draw事件。不能肯定地说，但一个很好的猜测是图形缓冲区在on_draw中自动更新/翻转，同时你正在进行绘图和侧链渲染功能。所以将所有渲染内容移动到on_draw是有道理的。

另一个问题是你没有触发实际的按键操作，而是你需要按键按下你开始的调度程序中的每个标记 - 你也可以使用它来渲染渲染功能。基本上你是在一个函数的一个集群***中进行事件处理+渲染+更新+ IO，呵呵。相反，你应该依靠on_key_press进行键盘事件。

最后，你在整个地方进行数学运算 - 当你进行实际渲染时，其中任何一项都可能完成。这就是为什么你可能会出现重影或奇怪的文物（有些事情没有完全更新位置等）。

但这是一个几乎可行的例子，为了更接近你想要的几个步骤。如果没有其他人（包括你）在几天内没有解决这个问题，我会继续并重新编写你的大部分代码并指出一些好的方向（批次就是其中之一）。

import pyglet
import random

pyglet.resource.path = ["resources"]
pyglet.resource.reindex()
# sets the resource path


class Snake_Window(pyglet.window.Window):

    a = 0
    dtx = 160
    dty = 200
    # sets the basic direction and snake body x and y

    def __init__(self):
        super(Snake_Window, self).__init__(width=1280, height=720)
        # sets resolution and inherits

        self.key_handler = pyglet.window.key.KeyStateHandler()
        self.push_handlers(self.key_handler)
        # sets keys

        self.set_caption("Wild Snake")
        # gives it a name

        self.background_image = pyglet.resource.image("background.png")
        self.food_image = pyglet.resource.image("food.png")
        self.snake_head_image = pyglet.resource.image("snake_head.png")
        self.snake_body_image = pyglet.resource.image("snake_body.png")
        # makes images usable

        self.center_image(self.food_image)
        self.center_image(self.snake_head_image)
        self.center_image(self.snake_body_image)
        # centers the images using center_image

        self.snake_head = pyglet.sprite.Sprite(img=self.snake_head_image, x=200, y=200)
        self.snake_head.rotation = 270
        # sets snake_head as a image on screen

        self.snake_body = pyglet.sprite.Sprite(img=self.snake_body_image, x=self.dtx, y=self.dty)
        self.snake_body.scale = 0.1
        self.snake_body.rotation = 90
        # sets snake_body as a image on screen

        self.background = pyglet.sprite.Sprite(img=self.background_image, x=0, y=0)
        # sets background as a image on screen

        self.food = []
        # sets food

        pyglet.clock.schedule_interval(self.game_tick, 0.1)

    def on_draw(self):
        self.draw_elements()

    def center_image(self, image):
        # sets the center of the image to the actual center
        image.anchor_x = image.width / 2
        image.anchor_y = image.height / 2

    def update_snake_head(self):
        # makes the snake head go and sets the x and y for the body
        if self.a == 0:
            self.snake_head.x += 40
            self.dtx = self.snake_head.x - 40
            self.dty = self.snake_head.y
        elif self.a == 1:
            self.snake_head.x -= 40
            self.dtx = self.snake_head.x + 40
            self.dty = self.snake_head.y
        elif self.a == 2:
            self.snake_head.y += 40
            self.dty = self.snake_head.y - 40
            self.dtx = self.snake_head.x
        elif self.a == 3:
            self.snake_head.y -= 40
            self.dty = self.snake_head.y + 40
            self.dtx = self.snake_head.x

    def update_snake_body(self, dtx, dty):
        # makes the snakes body go
        self.snake_body.x = dtx
        self.snake_body.y = dty

    def game_tick(self, dt):
        # updates snakes head, snakes body, key presses and sets the background
        self.update_snake_head()
        self.update_snake_body(self.dtx, self.dty)

    def draw_elements(self):
        # draws everything in window
        self.clear()
        self.background.draw()
        print('Head:', self.snake_head.x, self.snake_head.y, {0:'Right', 1:'Left', 2: 'Up', 3:'Down'}[self.a])
        self.snake_head.draw()
        self.snake_body.draw()
        self.flip()

    def on_key_press(self, symbol, modifier):
        # sets direction of snake upon key press and rotates his head accordingly
        if symbol == pyglet.window.key.ESCAPE:
            pyglet.app.exit()
        if symbol == pyglet.window.key.SPACE:
            print('Here')
        if symbol == pyglet.window.key.RIGHT:
            if self.a == 1:
                pass
            else:
                self.a = 0
                self.snake_head.rotation = 270
        elif symbol == pyglet.window.key.LEFT:
            if self.a == 0:
                pass
            else:
                self.a = 1
                self.snake_head.rotation = 90
        elif symbol == pyglet.window.key.UP:
            if self.a == 3:
                pass
            else:
                self.a = 2
                self.snake_head.rotation = 180
        elif symbol == pyglet.window.key.DOWN:
            if self.a == 2:
                pass
            else:
                self.a = 3
                self.snake_head.rotation = 0


game_window = Snake_Window()
pyglet.app.run()

我不仅会告诉你这个有效的代码，还有一个很好的建议。 不要再问这么多问题了，而是开始学习调试事情发生方式的方法。你现在正在黑暗中拍摄，提出问题，希望有人能为你解决问题，这样你就可以专注于有趣的东西 - 这就是游戏开发本身。 但是，您将在以后的生活中有很多用处 - 找到方法来调试，探索，理解和查明为什么事情发生或者没有按照您想要的方式发生。

在这里和那里放一些print("moo")，打印一些值，在整个地方添加日志记录/调试，直到你变得更聪明。它并不总是有效的，但它让我在你的代码中达到了这一点。