Houdini Fluid ＞＞Houdini Export fluids to unity note

One 、 Reference material ：

1、unity Fluid case project connection in ：（ Optional HDRP and URP pipeline ）

https://github.com/keijiro/HdrpVatExample

2、 Japanese developers keijiro Introduction to workflow course principles video

https://learning.unity3d.jp/4429/

3、 Official documentation tutorial ：

http://127.0.0.1:48626/nodes/out/labs--vertex_animation_textures.html

Two 、 Mind map notes ：

3、 ... and 、Houdini Fluid introduction Unity workflow ：

1、Houdini Internal solution fluid ：

Refer to the previous article here <Houdini Fluid ＞＞ Particle fluid spray notes >

Four 、Houdini Shelf configuration ：

1、 Understanding of fluid surface turning nodes ：

Before we can export the fluid normally , You need to check the solution Geomtrey Inside the node , Is there a <particlefluidsurface> Nodes exist .

here Be careful ：<particlefluidsurface> node , You can't create it on the outside , Only in Geomtrey Create this node within .

step ：

Fluid particles >> The particle turns to the surface >> reserve Out（Null） node >>VAT Grab Out Output

2、SideFxLab Shelf add ：

Refer to the video link for this link ：

https://www.sidefx.com/tutorials/sidefx-labs-installation/

• Add... To the shelf SideFXLabs

• Confirm to update the toolset , Then restart , All the tools on the tool rack will be displayed .

3、VAT Export settings and URP The use of Json,pakage：

• VAT establish ：

In the node control window , choice Out shunt , Click on Tab key , establish VAT node .

• VAT Export settings ：

1、 Solution mode selection , Optional rigid body , Fluid , Cloth , Particle patch and other four , Choose here Fluid .

2、 Select the export engine , Here you go Unity.

3、 After the engine is selected , Generate configuration to engine button select .

4、 Set the exported Out node , It can be copied here Out and Ctrl+C  Copy to the path bar , You can also choose... As shown in the figure Out node .

5、 Set the path of the generated file , When it's set , Will generate the following , Checked file .

• VAT export Unity Use Json：

1、 Here, before the official export , It is necessary to advance Unity Package Path Copy the path of , And in URP Of unity The path copied here is imported externally in the project .

Be careful ：（ If it is the first time to export to unity You need to select... Above User Interface-Normal Just can have , Here's a choice Pakage Path Options ）

2、 stay Unity After the environment configuration steps are completed , Click on Render Generate rendering .

5、 ... and 、Unity Environment configuration ：

Japanese four solution status reference documents

1、unity Import VAT use Shader:

• Get into URP Pipeline unity project , open Package Manager, Import the path just copied from the outside , And select Json file , Loading .

2、Unity Internal setting VAT Texture map ：

• Check if the file is generated ：

• Set the generated VAT Figure settings ：

stay Unity in , When loading textures , You can rescale the texture size to 2 The power of . If you adjust the size of the texture recording position information , The location information will move and will not work properly , So you need to do this .

Deselect [Generate Mip Map]. This is done to reduce memory usage .

Here's the part about mapping , You can go right in pakage It's in the bag shaderGraph Add . Whether it's URP and HDRP The authorities have provided extensible modifications .

Similar to the following ： Just add and link ColorMap Just place .

At the same time, we should also pay attention to houdini In the document , increase UV node , Export it . Pictured ：

6、 ... and 、 Effect display ：

unity Source file download address ：

https://download.csdn.net/download/Allen7474/15481626