在 Ursina 模块中调用（）做什么

Question

我导入了Ursina模块。它是一个游戏引擎。

我查了一个教程，并在代码invoke()中使用了。我试图找到文档，但似乎没有关于它的信息。教程中的代码如下所示：

from ursina import *

# create a window

app = Ursina()

# most things in ursina are Entities. An Entity is a thing you place in the world.

# you can think of them as GameObjects in Unity or Actors in Unreal.

# the first paramenter tells us the Entity's model will be a 3d-model called 'cube'.

# ursina includes some basic models like 'cube', 'sphere' and 'quad'.

# the next parameter tells us the model's color should be orange.

# 'scale_y=2' tells us how big the entity should be in the vertical axis, how tall it should be.

# in ursina, positive x is right, positive y is up, and positive z is forward.

player = Entity(model='cube', color=color.orange, scale_y=2)

# create a function called 'update'.

# this will automatically get called by the engine every frame.

def update():

    player.x += held_keys['d'] * time.dt

    player.x -= held_keys['a'] * time.dt

# this part will make the player move left or right based on our input.

# to check which keys are held down, we can check the held_keys dictionary.

# 0 means not pressed and 1 means pressed.

# time.dt is simply the time since the last frame. by multiplying with this, the

# player will move at the same speed regardless of how fast the game runs.

def input(key):

    if key == 'space':

        player.y += 1

        invoke(setattr, player, 'y', player.y-1, delay=.25)

# start running the game

app.run()

请帮我。

PS我正在使用Linux Mint。

Answer 1

它用于延迟调用函数，类似于 Unity 中的 Invoke()。所以在这种情况下，它会在 0.25 秒后将 player.y 减少 1。调用（函数，*args，**kwargs）编辑：文档中的示例：def test_func(item, x=None, y=None):    print(item, x, y)test_func('test')invoke(test_func, 'test', delay=.1)invoke(test_func, 'test1', 1, 2, delay=.2)invoke(test_func, 'test2', x=1, y=2, delay=.3)`