Converting MeshSequenceCache into frames

[AnywhereBarry (Barry)]

I imported a cloth simulation made on Marvelous Designer into blender as an alembic file. It’s working fine. Now I want to change the imported animation to be on 2s, but since the MeshSequenceCache doesn’t provide keyframes I’m not able to do so.
Is there any solution to this, or any known addons?
All I need is a way to convert the information into frames so I can adjust the interpolation manually

[joseph (J)]

I recently made something similar for Blender cloth simulation that acts on PhysicsPointCaches:

Stepped Interpolation (on 2s) on Cloth Simulation

This script adds a button to the cache panel of the Cloth Physics tab of the Properties editor to add stepped interpolation, on 2s, to all bakes: [2024-03-27 16_30_34-] Note that you must have Disk Cache turned on for this to work. Stepped cloth sim, on 2s: Normal cloth sim: Another example of stepped interpolation (*thanks to @thorn *): Note that this is non-destructive; you can rebake to clear the interpolation or rebake and re-interpolate if you make changes to the cloth. cloth…

I’m not sure, but that code might work for an alembic cache with some tweaks? If not, it’ll work for sure for Blender cloth sim if you wanted to try that

[Okidoki]

Welcome …

I remember something about the caceh mesh sequenece cache modifier and… yepp :

Changing speed of alembic imported sim

I’m sure you solved your issue, in the meanwhile here is how to retime a alembic cache (Blender 3.1 atm): importing an .abc you’ll get a MeshSequenceCache, go to “Time” then “Override Frame”. Here you need to remap frames (like the Kronos node in Nuke). Hope it helps. [image]

[AnywhereBarry (Barry)]

Thanks so much for the help, everyone! Turns out someone already had the solution to this. I found this script made by Gradyjnelson here:

How to Bake Alembic Mesh to Keyframes for NLA?

You can convert your alembic animation into a shapekey for each frame and animate those shapekeys using this script: import bpy ob = bpy.context obAc = ob.active_object mesh_data = obAc.data start_frame = bpy.context.scene.frame_start end_frame = bpy.context.scene.frame_end if not obAc.data.shape_keys: obAc.shape_key_add(name="Basis") # Create shape keys for each frame for frame in range(start_frame, end_frame + 1): bpy.context.scene.frame_set(frame) # Evaluate the mesh wit…

Awesome solution and exactly what I needed. I’ll try to turn the script into an addon to make things smoother. Again thanks for the help guys!

[Martin_Haugen]

Hi man. I am currently trying to do the exact thing you’ve accomplished. I have never used a script before, so not sure how to do this. Did you manage to turn the script into an addon? Or could you give a step by step guide on how you managed to bake the animation onto shapekeys with the script?