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Make cloth sim settle

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  • MaverickMongoose
    MaverickMongoose last edited by May 28, 2024, 10:50 AM

    Hi Dr Sassi,

    Do you happen to know if there's a way to make a cloth simulation settle like you can do with a rigid body sim using DEACTIVATION?

    I have a sim of gummy shapes falling but when they hit the ground they go on wiggling around forever.

    I feel like I've tried about every setting now but I can't get them to lose energy, any ideas?

    Thanks again!

    problem.c4d

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    • Dr. Sassi
      Dr. Sassi last edited by Dr. Sassi May 28, 2024, 6:31 PM May 28, 2024, 6:31 PM

      Hi MaverickMongoose,

      Thanks for the file.

      I read the file as one opinion is expressed, then a torrent of replies is dumped. They have no long-lasting energy, so they just fall and are done.
      .

      For your scene, the simplest way will be a change of timing, here to use Alembic and remap the time. I am slowing it down after the main impact. That might lead to "time banding," which could appear as little jumps. I assume that is a no-go, but I needed to mention it.

      Perhaps even more straightforward is to use a "cut" after the main impact and then show that all the commotion has stopped from a different camera angle. (I do not believe in the one-shot-does-it-all idea, … most of the time).
      .

      The main idea is that energy in the soft bodies needs to be drained to get your effect or that the material changes, like drying out.

      The first one, as I saw in your file, is the dampening, which can be animated to "suck" smoothly nearly all energy out of the scene. This works well with a single major event that needs to be calmed down.

      This can also be done with the Force> Friction, perhaps with Fields, which is more art-directable.

      The Softness of the object allows for a lot of motion. Here, I would suggest stiffening it if that is the expression for the scene, hence my little intro how I understand it. There is an option to do that with a Vertex Map, and all the options with Fields are included (Inside the Vertex <Map.)

      Here is a little example with a few of the methods mentioned.

      CV4_2024_drs_24_SIdp_01.c4d

      Check the
      Attribute Manager> Scene > Simulation> Dampening
      Cloth Tag> Softness> Dampening> Map
      (off in the file) Force> Friction

      (Yes, that is all over the top, for demo purposes of course.)

      All the best

      Dr. Sassi Sassmannshausen Ph.D.
      Senior Trainer, Maxon Master Trainer, L&D - Strategist
      Cinema 4D mentor since 2004, Member of VES, DCS.

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      • MaverickMongoose
        MaverickMongoose last edited by Jun 3, 2024, 9:03 PM

        Thanks for the tips on this!

        I tried tweaking those settings but it never really worked well (I guess due to the objects being too soft like you say) so I ended up changing the scene completely.

        Hopefully Maxon adds a diactivation method for cloth in future updates though, that would be super handy.

        Thanks again for your help though! Good to know about the Friction force, I'll be using that a lot more now!

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        • Dr. Sassi
          Dr. Sassi last edited by Jun 4, 2024, 5:41 PM

          Thank you very much, Maverick Mongoose, for the feedback.

          Please always feel free to request your needs in the "Share Your Idea!" here
          https://www.maxon.net/en/support-center.

          As usual, I support ideas we discuss here and add them as feature requests.
          But I need everyone's input as well; otherwise, I'll sound like I made it all up. 😉 Hehe, just kidding.

          Have a nice day

          Dr. Sassi Sassmannshausen Ph.D.
          Senior Trainer, Maxon Master Trainer, L&D - Strategist
          Cinema 4D mentor since 2004, Member of VES, DCS.

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          • MaverickMongoose
            MaverickMongoose last edited by Jun 10, 2024, 5:30 AM

            haha, I'll make sure I share the idea with them too, thanks again for trying!

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            • Dr. Sassi
              Dr. Sassi last edited by Jun 10, 2024, 5:34 AM

              Thank you very much, MaverickMongoose.

              Fantastic.

              Have a great start to your week!

              Dr. Sassi Sassmannshausen Ph.D.
              Senior Trainer, Maxon Master Trainer, L&D - Strategist
              Cinema 4D mentor since 2004, Member of VES, DCS.

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              • MaverickMongoose
                MaverickMongoose last edited by Jun 10, 2024, 5:37 AM

                You too!

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                • Dr. Sassi
                  Dr. Sassi last edited by Jun 10, 2024, 5:49 AM

                  Thanks you, MaverickMongoose.

                  Dr. Sassi Sassmannshausen Ph.D.
                  Senior Trainer, Maxon Master Trainer, L&D - Strategist
                  Cinema 4D mentor since 2004, Member of VES, DCS.

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