I'm trying to export a simple animation “Growing line” into Unity. But the “Bake animation” seems doesn't work.

The animation is very simple as below:

Curve
I
Carve <- Key frame the second U here.
I
Wireframe

How to make it work in Unity? I searched for few hours, but still cannot find a clue.

Are you getting any errors? Do you have an animation component on the gameobject?

seelanv
Are you getting any errors? Do you have an animation component on the gameobject?

I hit “Bake animation” button in Unity, a message box popup “No animation was found to bake”.

I'm using Houdini 16.0.621.

Waited two days and no valid feedback…..

I mean, can we have a complete feature list of Houdini Engine for Unity? I can know for sure something is not working right now and shouldn't keep waiting for help.

Sorry for the delay. I looked at this briefly yesterday and came across the same error message, but didn't get the opportunity to dive into it further. Will get back to you today.

As for the latter point about a feature list, it is something we're working on.

For what you're trying to do, the topology is changing therefore the Bake Animation feature wasn't meant for something like that. Bake Animation is meant specifically for animation of transform data.

I did try out what you're trying to do with growing a line and applying a carve. Since topology is changing, you can try out the Vertex Animation Texture feature. There is a Unity tutorial here: https://www.sidefx.com/tutorials/unity-shaders-for-vertex-animation-export-tools/ [www.sidefx.com]

I've tried this method and it works well. Just make sure you're import settings in Unity for the mesh and textures are exactly as how its in the tutorial. Let me know if you have any issues with it.

Thanks you!

I'm stuck by install the Game Dev tools from github. I download the package from Development branch, unzip, merge content to /Users//Library/Preferences/houdini/, open houdini, and I cannot find Vertex Animation Texture Beta rop in Houdini.

So I open Houdini, Assets -> Manage Asset Lib, none of the new hda files come with Game Dev tools are installed.

I tried to install them manually by use the Houdini Menu, Assets -> Install, error message pops up say:

…/rop_volumn_texture_1 is a invalid operator type library.

I thought maybe the expanded HDA has a different way to install, google, no answer…

rop_volume_texture_1 is not the one you want. With the manual method, you just need to try to install the rop_vertex_animation_textures.hda folder. Select that folder in the Select File dialog.

And to add to that change the name of the rop_volume_texture folder to “rop_volume_texture_01.hda”. The folder names need to have “.hda” at the end to be recognized as an hda.

Mike

Thanks guys! I finally made it!