Name: 胡迪尼並不可怕第 3 部分 - 動力 (Houdini Isn't Scary: Part 3 - Dynamics)
Uploaded: 2025-04-02T09:21:37.000Z
Duration: 21 min 35 s

Welcome back to Houdini isn't scary, part 3, dynamics.

歡迎回到 "胡迪尼並不可怕 "第三部分，動態。

程度副詞

So in this part we're doing something completely new, we're going into dynamics.

是以，在這一部分中，我們要做一些全新的事情，我們要進入動力學。

基礎被動語態

Now dynamics are used to create simulations, and simulations are approximations of real life systems.

現在，動力學被用來創建模擬，而模擬是對現實生活系統的近似。

What that means is we can create things like water, and fire, and smoke, and snow, you know, destructive forces, and all of these different things that are organic and you cannot keyframe and animate, but are rather generated through dynamics.

這意味著我們可以創造出水、火、煙、雪、破壞力以及所有這些有機的、無法通過關鍵幀和動畫生成的、而是通過動態生成的不同事物。

And as you can guess from the word dynamic, it's the opposite of static, so it's things that evolve over time.

從 "動態 "一詞就能猜到，它與 "靜態 "恰恰相反，是隨著時間的推移而演變的事物。

So let's not waste any more time, let's get straight into it.

所以，我們不要再浪費時間了，直接進入正題吧。

From where we left off last, we have our donut with its icing and its sprinkles.

從我們上次離開的地方開始，我們有了甜甜圈、糖霜和糖粉。

And if you didn't save this file, don't worry, there is a link down below to download the one that I've created for you.

如果你沒有保存這個文件，不用擔心，下面有一個鏈接，可以下載我為你創建的文件。

Everything is named, I've also added some nodes, you can go read those, all of these have been renamed so you know exactly what they do.

所有內容都已命名，我還添加了一些節點，你可以去閱讀這些節點，所有這些節點都已重命名，這樣你就能清楚地知道它們的作用。

But if you have your own file, you can also continue with that, and that's perfectly fine.

但如果你有自己的文件，也可以繼續使用，這完全沒問題。

So what we're going to be doing now is creating dynamics.

是以，我們現在要做的就是創造動力。

So to start on our first dynamics network, we can go ahead and drop down a geometry node.

是以，要開始第一個動力學網絡，我們可以先放下一個幾何節點。

We can rename this one to a dynamic sprinkles, just by double-clicking on the name.

我們只需雙擊該名稱，就可以將其重命名為動態噴灑。

And then we can dive inside by double-clicking on the node.

然後，我們可以雙擊該節點，深入其中。

So once we're inside, as expected, we can see our ghosted donut.

所以，我們一進去，就能如願以償地看到我們的幽靈甜甜圈了。

And if you can't, remember to just switch on ghost other objects in the top right.

如果你做不到，記得打開右上角的幽靈其他對象。

In here, we're going to drop down a grid.

在這裡，我們要下拉一個網格。

And we can drop down a grid in our dynamic sprinkles node.

我們可以在動態噴灑節點中放下一個網格。

And remember from part one, you can just move around by holding space.

記住第一部分，你可以通過保持空間來移動。

So we're going to scale this down to a two by two grid so we can see it there.

是以，我們要把它縮小到一個 2 乘 2 的網格，這樣我們就能看到它了。

And then we're going to drop a transform node because we want to move this up.

然後，我們要刪除一個變換節點，因為我們要將其上移。

And what this grid is going to do is it's going to emit points.

而這個網格要做的，就是發射點。

We're going to have points that fall from this grid and they land on our donut.

我們會有一些點從這個網格上掉下來，落在我們的甜甜圈上。

We're then going to copy tubes to those points to make sprinkles.

然後，我們要把管子複製到這些點上，做成灑花。

So we're dynamically creating some sprinkles that are going to be thrown over the donut.

是以，我們要動態創建一些灑在甜甜圈上的小甜點。

Now, the next thing that we want to do is we want to animate this grid.

現在，我們要做的下一件事就是將網格動畫化。

Because as time passes, we wanted to move from the left-hand side of the donut to the right-hand side of the donut.

因為隨著時間的推移，我們希望從甜甜圈的左側移動到甜甜圈的右側。

So to do that, what we're going to do is firstly move our grid over to the left.

要做到這一點，我們首先要把網格向左移動。

Then what we're going to do is we are going to hold alt and click on this word that says translate.

然後，我們要做的就是按住 Alt 鍵，點擊 "翻譯 "這個詞。

What that'll do is it'll make all of these green.

這樣一來，所有這些都會變成綠色。

And what that means is that we have a keyframe on the current frame.

這意味著當前幀上有一個關鍵幀。

Now, if we go and move along our timeline, we can go to the bottom and just click on this one where it looks like a flag and drag it across.

現在，如果我們沿著時間軸移動，就可以移動到底部，點擊這個看起來像旗子的地方，然後拖動它。

We can drag it all the way over to about 230.

我們可以把它一直拖到 230 左右。

And then what we're going to do is move back up to our grid and move it over to three.

然後，我們要做的就是回到我們的網格，把它移到三。

And now you'll notice that it's no longer green.

現在你會發現，它不再是綠色的了。

Yellow means that something has changed but has not been keyframed.

黃色表示某些內容已發生變化，但尚未設置關鍵幀。

So what we need to do is hold alt again and then click on translate.

是以，我們需要再次按住 Alt 鍵，然後點擊 "翻譯"。

So now if we go back to the beginning, you'll notice that as we play this back, our grid will move from the left to the right.

現在，如果我們回到開頭，你會發現當我們回放這段視頻時，網格會從左邊移動到右邊。

And if yours is playing back too fast, then you'll just need to check the real-time toggle.

如果你的回放速度太快，那麼你只需檢查實時切換開關即可。

So click on real-time toggle to activate it.

是以，點擊實時切換即可激活它。

Because if it's deactivated, Houdini will just play this back as quickly as it can.

因為如果停用，Houdini 就會盡快回放。

When this is activated, it'll play it back at 24 frames per second.

激活後，將以每秒 24 幀的速度回放。

很好，我們的網格可以移動了。

But now we need to turn this into an emitter.

但現在我們需要把它變成一個發射器。

So what we need to do is we need to create particles.

是以，我們需要做的是創建粒子。

And you create particles inside of a dynamics network.

你可以在動力學網絡中創建粒子。

Now particles are also referred to as POPs.

現在，顆粒也被稱為持久性有機汙染物。

And POPs just stands for particle operators.

而 POPs 只是粒子操作者的縮寫。

And you may have heard of other terms like this.

你可能還聽說過其他類似的術語。

Basically, SOPs is everything that we've been doing.

基本上，SOP 就是我們一直在做的一切。

DOPs is what we're going to be doing in this tutorial.

So POPs fall under dynamic operators because particles are dynamic.

是以，持久性有機汙染物屬於動態運算符，因為粒子是動態的。

So to create our first dynamic network, we're going to press tab and just type POP.

要創建第一個動態網絡，我們按下 tab 鍵，然後輸入 POP。

And you'll see over there it says POP network.

We're going to take our transform and plug it into our POP network.

我們要把轉換器插入 POP 網絡。

Set your display flag on the POP network.

是以，我們有自己的 POP 網絡。

And as you can see there, it says DOP network.

正如你所看到的，上面寫著 DOP 網絡。

That just means dynamic operator network.

這只是意味著動態運營商網絡。

So let's dive inside of this and see what's going on.

讓我們深入其中，看看到底發生了什麼。

在這裡，我們有四個主要節點。

So here's an illustration that basically breaks it down for you.

是以，這裡有一個圖解，基本上可以為你解釋清楚。

At its core, a dynamics network needs a solver.

動力學網絡的核心是需要一個求解器。

What the solver does is it takes all of the information.

解算器的工作就是獲取所有資訊。

It takes your parameters, your settings, all of your inputs, and mixes them all together in a part and outputs something for you.

它能獲取你的參數、設置和所有輸入，並將它們混合在一個部件中，然後輸出給你。

So this is basically the brains of the dynamics network.

是以，這基本上就是動態網絡的大腦。

Next, on the left, we have something that is absolutely always necessary.

接下來，在左邊，我們有一些絕對必要的東西。

So the object goes into the leftmost input of the solver.

是以，對象會進入求解器最左邊的輸入端。

And if you remember from our previous tutorial, we said that generally what goes into the left input of a node is also what is output by that node.

如果你還記得我們在之前的教程中說過，一般來說，進入節點左側輸入的內容也是該節點的輸出內容。

And that's the case with dynamics as well.

And then it gets adjusted by our POP solver.

然後由我們的 POP 解算器進行調整。

Now on the right hand side, we have sources.

現在，在右側，我們有了信息源。

So what happens here is we source things into our dynamics network.

是以，我們的工作就是將源代碼輸入我們的動態網絡。

字幕列表影片播放

胡迪尼並不可怕第 3 部分 - 動力 (Houdini Isn't Scary: Part 3 - Dynamics)

stick

basically

scale

accurate