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Alembic and cloth dynamics - possible?
Posted: 01 June 2022 06:01 PM   [ Ignore ]  
Total Posts:  80
Joined  2020-01-07

I am in need of an animation of a flower dying and then falling off the stem. I was thinking I’d rig he flower, do the bloom animation and bake to an alembic, then towards the end of the death, have it switch to cloth dynamics and then fall off.

I’m not sure this is the approach to take, but it doesn’t seem to work. Especially since the cloth dynamic doesn’t have a “start” keyframe action.

Is there a better approach here? I’m sure I can use an un-subdivided version need be if it’s too heavy to sim.


Thoughts? Thanks in advance.

P

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flower RnD.zip  (File Size: 56KB - Downloads: 63)
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Posted: 01 June 2022 07:24 PM   [ Ignore ]   [ # 1 ]  
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Hi P.,

Thanks for the file,

But I do not have the abc file, so I have a cube, a sphere, and an empty Alembic file.

Cheers

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Posted: 01 June 2022 07:31 PM   [ Ignore ]   [ # 2 ]  
Total Posts:  80
Joined  2020-01-07

here is the original file of the flower.

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pedal_animatoins_for_production_v005.zip  (File Size: 144KB - Downloads: 67)
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Posted: 01 June 2022 09:07 PM   [ Ignore ]   [ # 3 ]  
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Thanks for the file, P.

From my point of view, the geometry of the flower is not ideal to just add a Cloth or a Softbody to it. It exploded in every single case I tried.

The following exploration was to build a cage around and use dynamics on that. Also, here, the results are not usable, from my point of view. (I had built the cage via Volume, Remesh 10%, then used in a Mesh Deformer.)

As I have said often, Dynamics are not the tool for art-directing delicate shapes or situations. The amount of time one has to invest in fine-tuning the results is often just not worth it.

I used the Melt Deformer and others to see how this one might support any efforts. I don’t think that doesn’t go anywhere.

Since you already have a joint rig established, why not use it? To create the final scene as well with it. Then use a pose morph to “model” the changes? If that was from the start of the plan, I might have tripled each joint (three instead of one each time) to express that appropriate to have the “final” moment” of the flower.

Or much more straightforward, see the file, use an FFD [deformer], and animate that cage via a PoseMorph (use one slider, then add the next with the selection “In Place”, so each slider shows a step along the way. My example can’t be as detailed as you would for your production; for me, it is more to show the how. I don’t have the script here, speaking of the artist’s intention. You will know how it has to look.
Example:
https://www.amazon.com/clouddrive/share/k2XgE9XBO5qI7RfQJJZEGaQQVpYNJgBzPmsMn7z96k

There are other ways, but since you have a joint rig, I think any point manipulating options/functions would only add more complexity to it than be of any actual use.

All the best

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Dr. Sassi V. Sassmannshausen Ph.D.
Cinema 4D Mentor since 2004
Maxon Master Trainer, VES, DCS

Photography For C4D Artists: 200 Free Tutorials.
https://www.youtube.com/user/DrSassiLA/playlists

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