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[学员试译作品] SOM | How to Use the Loop Expression in After Effects (在AE中创建循环表达式 中文字幕)

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教学名 [学员试译作品] SOM | How to Use the Loop Expression in After Effects (在AE中创建循环表达式 中文字幕)
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CG教学翻译网听译培训学员 尹祥 的听译作品。(指导老师:陈杰)

尹祥 2016年8月加入听译培训 本作品是 尹祥 第一部试译作品

 
 

在本教学中,我们将讲解所有与AE中循环表达式有关的知识。

In this tutorial we'll cover everything you need to know about the loop expression in After Effects

下载地址:链接:http://pan.baidu.com/s/1mhS7W0o 密码:u5by

 

 
尹祥 听译文字


Hi,this is school of motion and in this after effects tutorial.
I'll show you how to use loop expression.
if you are new to After Effects the loop expression may sound a little scary.
but it's really a very easy way to loop keyframe values over and over again in after effects without copyping and paste values
it can save you a lot of time. so if you are ready to learn something new, let's do it.
we get going too far, here I want to let you know you can download the free project file.
by just going over the school of motion, just go to the website you will find the link to the description of this video and then you can download the project files you can follow along with this tutorial
so if you are new to expressions or after effects in general
then you may not be familiar with the loop expression
but all the loop expression is a simple small code
it tells After Effects to repeat a process again and again
and there is different ways in which you can modify the way after effects does this.
But I'll explain all those things in this tutorial.
so right here, we have the most simple type loop property
it's the loopout property with no loop type inside
that doesn't make sense right now, but it will in just a little bit.
so basically as you can see here we have a simple sequence of course one second and 11 frames
so, 35 frames, this little dots here goes around this little figure 8
so it just kind goes around the figure 8 and then it comes to rest
now typically if you want to continue this dot along the figure 8 path
you will have to copy these keyframes and paste them here, and paste them, paste them and do that for however long your composition or sequence is
that is not necessarily ideal if you want to very quickly create a looping background or a looping foreground element like this dot here.
so what you can do is using the loop expression to have it continue along that path forever
so to set an expression, all you have to do is hold on alt on a pc or option on a mac, and hit the stopped watch you are trying to adjust
and then we'll type loopOut() and the semicolumn.
so now, if you play this back you'll see the dot goes around this infinity loop basically for infinity

校正后

Hi, what's up, this is kyle with school of motion
你好,我是动画学院的凯尔

and in this After Effects tutorial
在这个AE教学中

I'll show you how to use the loop expression
我会告诉大家如何使用循环表达式

if you are new to After Effects
如果你才刚开始学习AE

the loop expression may sound a little scary
loop循环或许听起来有点吓人

but it's really a very easy way to loop keyframe values over and over again
但是它确实是一种非常简单的在AE中反复循环执行关键帧值的方法

in after effects without copyping and paste keyframes
整个过程不需要复制与粘贴任何关键帧

it can save you a lot of time
这可以节省你不少时间

so if you are ready to learn something new, let's talk a bit.
如果你想学点新东西,那么我们就来谈谈它

so before we get going too far, here I want to let you know you can download the free project file.
在深入讲解之前,我想让大家知道是有免费的项目文件可供下载的

by just going over the school of motion, just go to the blog post
方法是进入动画学院的网页中,进入博客贴中查看

you will find the link to the description of this video
你会在视频介绍文字中找到链接

and then you can download the project files you can follow along with this tutorial
接着你就可以下载项目文件,并且跟着本教学学习了

so if you are new to expressions or After Effects in general
如果你不熟悉表达式,或者不熟悉AE

then you may not be familiar with the loop expression
那么或许就不太熟悉循环表达式

but all the loop expression is a simple small snippet of code
但所有的循环表达式都只是一段很简单的小代码

it tells After Effects to repeat a process again and again
它告诉AE去反复执行一个过程

and there are different ways in which you can modify the way which After effects does this.
这是一个不同的方法,通过它你可以改变AE执行它的方式

But I'll explain all those things in this tutorial.
我会在这个教学中讲解所有这些东西

so right here, we have the most simple type loop property
这里有最简单的循环属性

it's the loopout property with no loop type on the inside
这是一个里面没有循环类型的循环属性

that doesn't make sense right now, but it will in just a little bit.
现在还看不出个所以然来,不过一会儿就清楚了

so basically as you can see here
你可以看到这里

we have a simple sequence over the course of one second and 11 frames
有一个大约1秒加11帧的简单序列

so, 35 frames, this little dots here goes around this little figure 8
也就是35帧,这个小点是沿着这个小文字8的

so it just kind goes around the figure 8
它是沿着文字8的前进的

and then it comes to rest
接着停下来

now typically if you want to continue this dot along the figure 8 path
通常来说如果你希望这个点继续沿着这个8前进

you will have to copy these keyframes
就需要复制这些关键帧

and paste them here, and paste them, paste them
粘贴到这里,粘贴,粘贴

and do that for however long your composition or sequence is
你的合成或者说是序列有多长,你就复制多长

that is not necessarily ideal if you want to very quickly create a looping background or a looping foreground element like this dot here.
如果你希望快速创建一个循环背景, 或者是像这个点的循环前景, 那么这方法就不太理想了

so what you can do is using the loop expression
你能做的就是使用循环表达式

to have it continue along that path forever
让它永远沿着这条路径前进

so to set an expression, all you have to do is hold on alt on a pc
要设置一个表达式,在PC机上你要做的就是按下ALT键

or option on a mac, and hit the Stopwatch you are trying to adjust
在苹果机上按下Option键,然后点击你要调整的Stopwatch

and then we are just gonna type loopOut(), and then open parentheses and close parentheses
接着我们要输入loopOut(),接着是括号

and the semicolumn.
后面接上一个分号

so now, if you play this back
现在,如果你回放它

you'll see the dot goes around this infinity loop basically for infinity
你会发现这个点就是永远的执行这个循环动作了


 
 
 





 
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