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hi guys and girls another tutorial for
嗨，男人和女孩的另一个教程

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you this one was a request somebody
你这个人是一个请求

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asked for a particle system for falling
要求一个落下的粒子系统

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leaves so we're gonna work on that I'm
叶所以我们 对我 会工作

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gonna be using two textures and a static
 将使用两个纹理和一个静态

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mesh for this there is none using a mesh
这个网格没有使用网格

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it's because I want a particular kind of
 这是因为我希望有一种特殊的

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rotation if we weren't using a mesh the
旋转， 如果我们没有使用网格

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image would always be facing the camera
图像总是面向相机

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and would only rotate on one axis and
并且只会在一个轴上旋转

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that's not what we want I want to be
 这不是我们想要的

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able to make these rotate on multiple
 能够使这些旋转的多

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axes so they look a bit more realistic
轴因此看起来更逼真

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so the textures that we're going to use
 所以我们要使用的纹理

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are a diffuse that I've just found on
是我刚刚发现的弥漫

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Google a normal map generated from
 Google生成的普通地图

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bitmap to material and then just their
位图到材料， 然后只是他们的

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edges the plane that I've added a couple
 边缘我添加了一对 的飞机

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of crimps to just so that you can never
 卷曲只是为了让你永远不会

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really tell that this is a flat plane
 真的告诉我这是一架平面飞机

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while is falling so first thing we're
虽然正在下降所以我们首先要做的事情

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going to do is right-click and well
要做的就是右键单击并且很好

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create a new material this is going to
 创造这将 新材料

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be leaf underscore and just move my
是叶子下划线，只是移动我的

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phone out of the way so just lint on it
手机闪开所以就掉毛就可以了

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and it vibrated well open this up and
它振动得很好，打开了

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we'll grab a diffuser now normal and
我们现在正常抓住一个扩散器

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dragged easy we'll probably get a lot
 拖得容易，我们可能会得到很多

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more straight into the novel just make
 更直接进入小说中

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this planar so we can see this there you
这个平面所以我们可以在那看到你

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go
走

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nice normal and then we'll plug our
很正常，然后我们将插入我们的

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diffuse into the base color we're going
扩散到我们要去的基色

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to change the material to be a
将材料更改为a

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translucent default lip material and
半透明默认唇材料

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we're going to change the lighting mode
我们要改变照明模式

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from volumetric non directional
从体积非定向

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volumetric directional which lets us use
 允许我们使用的体积方向

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a normal map with a translucent material
 带有半透明材质的法线贴图

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so we don't have any opacity in this
所以我们没有任何不透明性

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we're just going to take the Alpha
我们打算拿下阿尔法

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Channel and put that into the opacity
 将其添加到不透明度中

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and that should give us a nice
这应该给我们一个好的

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leaf yay it's very leafy now if we turn
 叶子，如果我们转过来，现在它很绿叶

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this into a ball real quick so you can
这很快成为一个球，所以你可以

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see the way this is gonna be nice and
 看到的样子，这是去是好的，

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shadowy as we live in this lip we want
 因为我们生活在这个嘴唇中，我们想要的是阴暗的

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the we want the light to actually affect
 我们希望光能真正影响

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this we're just gonna click two-sided
 这个我们只是点击双面

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here and that's gonna make the preview a
在这里，这将是预览a

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little bit funky because it's going to
有点时髦， 因为它会

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be drawing on top of itself but that's
 正在绘制自己，但那是

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that's okay
 没关系

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you see that's very very funky weird and
你看这是非常非常时髦的怪异和

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then we are going to just apply then you
然后我们将会申请你

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can save that and then we're gonna make
可以保存， 然后我们会做

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the actual powerful system I'm just
实际强大的系统我只是

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going to assign the leaf material to
 去叶材质指定给

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this plane just so that it's on there by
 这架飞机正好在那里

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default yeah right-click particle system
默认是的右键单击粒子系统

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leave underscore Pete looking this up
离开强调皮特看这件事

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and now we're going to the right-click
现在我们要 右击

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type data new mesh data under the mesh
 在网格下键入数据新的网格数据

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we're gonna find the leaf on your school
我们会找到你学校的叶子

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static mesh oh he's that big in you get
静态网格哦，你得到的那么大

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is that material gonna choke it there it
是那种材料会把它扼杀在那里

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is yeah
 是的

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now if you don't place the material on
现在，如果你没有放置材料

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top of the static mesh then you'll have
 然后你将拥有静态网格的顶部

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to use this little box here which is
 在 这里 使用这个小盒子

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override material and then go to the
覆盖材料，然后转到

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required and under the material find the
要求和根据材料找到

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material that you used with leaf
 你用叶子的材料

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underscore m okay so first thing we'll
强调米好了，所以首先我们要的东西

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do is we'll head into spawn and we're
我们会进入产卵区吗？

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gonna change this one to a constant two
 要改变这种一到一个常数有了两种

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because we don't we don't want too many
因为我们不想要太多

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of these we only want a couple of these
这些我们只希望这些夫妇

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at a time I'm gonna go into their
在那个时候我会进入他们的

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lifetime and I'm going to give these a
一生， 我要给这些

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set a minimum and maximum of thirty
 设定最小值和最大值为30

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seconds on this to persist for quite a
这一秒将持续相当

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while before they disappear
而在他们消失之前

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their initial size this is really
他们的初始大小确实如此

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we're gonna change this to a maximum of
 我们要改变这一个最大的

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one and a minimum of point six perhaps
也许至少是第六点

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now it shouldn't be too big in the world
现在它不应该在世界上太大

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but we'll see in a little while
 但我们会在一段时间内看到

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their initial velocity we are going to
他们的初始速度我们要去

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set to the 10 10 minus 20 then minus 10
设置为10 10 -20然后减去10

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minus 10 minus 20 so they're they'll
减10减20所以他们就是他们

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scatter on the X&Y where are we the
分散在X和Y上我们在哪里

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scatter on the X from Y with a slight
从Y开始散布在X上

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random offset but the Z is always going
随机偏移，但Z总是在前进

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to be the same so they're all gonna fall
 是一样的，所以他们都会堕落

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about the same rate color of life we
 我们的生活颜色大致相同

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don't need to delete that we're going to
 不需要删除我们要去的地方

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right-click location there is initial
 右键单击位置有初始值

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location we're going to give this an
我们要给这个位置

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area where they can all spawn so maximum
它们都可以产生最大的区域

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of 250 250 mm 250 ya know - for that and
 250 250 mm 250ya知道 - 为此和

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the minimums are going to be 250 - 250 -
最低限额将是250 -  250  -

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250 and then leave the location on 250
 250然后将位置保留在250

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we want them all to spawn hi
我们希望他们都能产生喜

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but at random locations and they're
但在随机的位置，他们是

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doing that now you can see them now we
 现在你可以看到他们了

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get a right-click can we go ahead to
得到单击右键，才能继续前进，

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orbit and we're gonna get an orbit and
轨道，我们将得到一个轨道和

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this is going to create like a nice
这将创建是一个不错的

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little windy effect so they kind of
 它们有点风大的影响

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caught in the wind underneath the offset
 在偏移下方的风中被抓住 了

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mount under the minimum maximum we're
 在我们最小的最大值下安装

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going to change these values to be 50 50
要将这些值更改为50 50

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is 0 and then 25 25 0 they go in for
 是0然后25 25 0他们进去

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room
 房间

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I have a feeling that might be the wrong
我有一种可能是错误的感觉

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numbers that I've got written down
我写下来的数字

118
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Nathan 5:5 and 2.5 or I change their
 内森5：5和2.5或我改变他们的

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rotation Ament yeah so we want to change
旋转Ament是的，所以我们想要改变

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their rotation amount down we can
 他们的轮换量我们可以

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probably go for even further down than
可能更进一步

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that because we want these to have this
 因为我们希望这些有这个

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nice orbit I fetched but we don't be
我获得了不错的轨道， 但我们不是

124
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anywhere near as powerful as it was just
任何接近强大，因为它只是

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now rotation rate to mountain let's turn
现在的旋转速度 山让我们把

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that down as well again now you can see
 现在你可以看到再次下降

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that they are getting like a little bit
 它们越来越像一点点

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of a spin to them but it's it's very
 对他们来说是一个旋转，但它是非常的

129
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very slight so we're going to head back
非常轻微所以我们要回头了

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to the offset here and we are actually
 这里的偏移，我们实际上是

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going to increase this back up to 50 50
 要增加这个回升到5050

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0 and 25 25 0 so now they look like
 0和25 250现在看起来像

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they're kind of just caught in this nice
他们有点陷入这个美好的状态

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draft as you can see on them all there
 你可以在那里看到草稿

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now get a right-click and we're going to
现在得到一个右键点击我们要

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head to rotation initial mass rotation
头部旋转初始质量旋转

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or this is going to do is it's going to
或者这是要干什么时它会

138
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spawn the moor then at a random point
 然后在随机点产生沼泽

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random random amount of rotation you can
随机随机旋转量你可以

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see and now we're gonna right-click
 看，现在我们要点击右键

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rotation rate initial mesh rotation rate
旋转速率初始网格旋转速率

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now you can see these are all flying
现在你可以看到这些都飞了

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around like a lot so we're gonna change
 周围很多，所以我们会改变

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this down to maybe minus one mine at
 这归因于可能减一矿在

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point one point one point one with a
 点一个点一个点一个用

146
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minimum of 0 and now they're gonna get
至少0，现在他们会得到

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this nice light little flap so they can
 这个漂亮的 小光瓣让他们可以

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all rotate air is just slightly you can
所有旋转空气只是你可以

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maybe ten it down even more two point
也许10下来更两点

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zero five depends on how how windy you'd
 零五取决于你如何刮风

151
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like it to look I quite like that that's
喜欢它看起来我非常喜欢那样的

152
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that's quite a nice amount so we'll save
这是相当不错的金额，所以我们会节省

153
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that real quick the bounds are fine
 真正的快速界限很好

154
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we'll just set them just in case and I
我们只是设置它们以防万一

155
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will drag this into the level raise it
 将它拖到提升它的水平

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up a little bit now you can see the
 现在你可以看到了一点点

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folly there we go now they are still a
 愚蠢我们现在去，他们仍然是一个

158
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little bit big so I'm probably gonna
 有点大，所以我可能会

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change their sight a little bit and of
改变他们的视线一点点

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course you can tell that they're quite
当然你可以说它们很完美

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obviously spawning here but that's
显然在这里产卵， 但那是

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because there's no tree in a natural
因为自然界里没有树

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scene you'd have a tree and you put the
场景你有一棵树，你把它

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particle emitter inside the actual tree
 实际树内的粒子发射器

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so they look like they're coming out of
所以他们看起来像是在走出来

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the tree itself yeah these are so very
树本身是啊，这些都是非常等等

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big nay can see that we're getting the
大不了可以看到我们得到了

168
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the bounds issue here so H do is just
这里的边界问题所以H做的只是

169
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let this this little cheeky Devils place
让这个小小的厚颜无耻的魔鬼放置

170
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through and then set that for expense
通过，然后设置为费用

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afterwards once these are a little bit
 之后这些都是一点点

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of lower let's quickly change their size
 更低的让我们迅速改变他们的大小

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or say point six point six point six
 或者说点六点六点六

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followed by 0.3 yeah although that's
然后是0.3是的， 虽然那是

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I've removed their place for you so here
 我已经把你的位置移到了这里

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we go now if you wanted to make these
 如果你想制作这些，我们现在就去

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look like there's a side breeze we can
看起来我们可以有微风

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00:09:47,159 --> 00:09:50,539
go into acceleration then give the easy
进入加速然后轻松

179
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an acceleration and let's say we want
 加速，让我们说我们想要

180
00:09:56,519 --> 00:09:58,679
these to be blowing on the Y we can stay
 这些要吹Y我们可以留下来

181
00:09:58,679 --> 00:10:02,720
there blowing between 50 and 25 and 50
 在50到25和50 之间吹

182
00:10:02,720 --> 00:10:05,940
and now you see that they're all blowing
现在你看到他们都在吹

183
00:10:05,940 --> 00:10:09,500
sideways
侧身

184
00:10:09,500 --> 00:10:15,690
yay I'm a bit it's a bit strong really
 我真的有点强壮

185
00:10:15,690 --> 00:10:19,289
isn't it so strong and then we'll give
 不是那么强大，然后我们会给

186
00:10:19,289 --> 00:10:27,480
them also a bit of downwards drag oops I
他们也有点向下拖动我

187
00:10:27,480 --> 00:10:29,129
say downwards and I know don't put
向下说， 我知道不要放

188
00:10:29,129 --> 00:10:31,879
negative values they're floating away
 负值他们飘走

189
00:10:31,879 --> 00:10:35,159
maximum of minus five minimum of minus
 最小减零最小值减去零

190
00:10:35,159 --> 00:10:36,000
ten
 十

191
00:10:36,000 --> 00:10:39,149
I know they'll all slowly fall downwards
我知道他们都会慢慢倒下

192
00:10:39,149 --> 00:10:42,690
but are we going sideways and I can see
 但我们是否会侧身而且我能看到

193
00:10:42,690 --> 00:10:45,509
this one's a little here I think they
 我认为这是一个在这里的一点点

194
00:10:45,509 --> 00:10:53,340
are so just let that play through for a
如此才让， 对于一个玩透

195
00:10:53,340 --> 00:10:59,340
second so you can see them that's where
第二，所以你可以看到他们在哪里

196
00:10:59,340 --> 00:11:01,259
the bounds ends so if you're not looking
如果你不看，那么界限就会结束

197
00:11:01,259 --> 00:11:03,509
at the bounds the particles will no
 在界限处，粒子将没有

198
00:11:03,509 --> 00:11:05,090
longer render no matter where they are
无论在哪里，渲染时间都会更长

199
00:11:05,090 --> 00:11:07,440
see that they blink in and out of
 看到它们闪烁进出

200
00:11:07,440 --> 00:11:14,279
existence there if you wanted some more
 如果你想要更多，那就存在

201
00:11:14,279 --> 00:11:16,019
leaves obviously just increase this born
叶子显然只是增加这个出生

202
00:11:16,019 --> 00:11:26,970
rate yay nice and cool and they're doing
速度很好，很酷，他们正在做

203
00:11:26,970 --> 00:11:29,129
that thing now these are going to be
 那件事情现在会发生

204
00:11:29,129 --> 00:11:32,460
flying through the level I assume let's
飞过水平我假设让我们

205
00:11:32,460 --> 00:11:33,289
think
认为

206
00:11:33,289 --> 00:11:37,320
yeah we can see it is there if we just
 是的，如果我们只是，我们可以看到它在那里

207
00:11:37,320 --> 00:11:39,360
grab this real quick yeah you can see
抓住这个真正的快速是的，你可以看到

208
00:11:39,360 --> 00:11:40,379
they're flying through the lower than
他们通过低于飞行

209
00:11:40,379 --> 00:11:43,379
the system for the full 30 seconds so we
 系统整整30秒所以我们

210
00:11:43,379 --> 00:11:45,840
can in fact get these a collision so if
 事实上可以让这些碰撞，如果

211
00:11:45,840 --> 00:11:48,679
we right-click tuition after collision
我们在碰撞后右键点击学费

212
00:11:48,679 --> 00:11:53,460
and just leave that set to kill so when
然后离开那套杀人

213
00:11:53,460 --> 00:11:55,470
they hit the floor now they should you
他们现在应该在地板上

214
00:11:55,470 --> 00:12:01,710
should die six pounds I guess a nice big
应该死六磅我觉得一个很好的大

215
00:12:01,710 --> 00:12:03,629
area now so we should be able to see if
现在区域，所以我们应该看到，如果

216
00:12:03,629 --> 00:12:07,620
we firstly I know they'll don't no
 我们首先知道他们不会没有

217
00:12:07,620 --> 00:12:09,990
longer disappear in there well they'll
他们会在那里消失得更久

218
00:12:09,990 --> 00:12:11,610
no longer just fly through the level
不再只是飞过水平

219
00:12:11,610 --> 00:12:14,789
they'll actually die when they hit the
当他们击中时他们真的会死

220
00:12:14,789 --> 00:12:16,110
floor so they should just pop out of
 因此他们应该突然出现

221
00:12:16,110 --> 00:12:17,759
existence rather than fly through the
存在而不是飞过

222
00:12:17,759 --> 00:12:19,889
floor
地板

223
00:12:19,889 --> 00:12:24,250
there we go we fix the bounds and these
 在那里，我们去修复界限和这些

224
00:12:24,250 --> 00:12:27,299
are blowing in the wind
在风中飘扬

225
00:12:27,299 --> 00:12:35,049
yay and you can see there that none of
 你可以看到那里没有

226
00:12:35,049 --> 00:12:36,129
them are flying through the floor
 他们 在地板 上飞舞

227
00:12:36,129 --> 00:12:39,100
they're ending so we're not getting any
 他们结束了所以我们没有得到任何结果

228
00:12:39,100 --> 00:12:40,809
orange squares that indicate where they
橙色方块表示它们的位置

229
00:12:40,809 --> 00:12:47,830
are so there you have it some nice
是这样你有一些不错的

230
00:12:47,830 --> 00:12:54,190
falling leaves how that's been helpful
落叶如何有用

231
00:12:54,190 --> 00:12:56,950
for you guys thank you to the person
为你们感谢你的人

232
00:12:56,950 --> 00:12:59,379
that requested this and I did already
要求这个，我已经做了

233
00:12:59,379 --> 00:13:00,970
have a version of this going but I
 有一个版本，但我

234
00:13:00,970 --> 00:13:02,559
wasn't using mesh in that version I
 在那个版本我没有使用网格

235
00:13:02,559 --> 00:13:04,299
decided to change it to a mesh version
决定将其改为网格版

236
00:13:04,299 --> 00:13:05,649
because now we get this really nice
因为现在我们真的很好

237
00:13:05,649 --> 00:13:07,450
shadowing on the underside of the leaves
 在叶子的下面遮蔽

238
00:13:07,450 --> 00:13:09,250
that changes what they're rotating and
 改变他们旋转什么，

239
00:13:09,250 --> 00:13:12,309
stuff and you just get a much nicer
东西，你只是得到一个更好的

240
00:13:12,309 --> 00:13:14,080
amount of rotation out of them they look
 他们看起来旋转的量

241
00:13:14,080 --> 00:13:18,759
a little bit a little bit sweeter yes so
 一点点一点点 甜是这样

242
00:13:18,759 --> 00:13:20,860
have fun with that one I hope that you
 和那个玩得开心，我希望你

243
00:13:20,860 --> 00:13:23,200
guys can use that and I'll see you next
伙计们可以使用它，接下来我会见到你

244
00:13:23,200 --> 00:13:24,365
time
 时间