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    Dynamics Question

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    cable tube simulation animation rig
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    • R
      Rough1 last edited by Dr. Sassi

      Hello, I have a question about dynamics, specifically rope dynamics. Say I have a model of a bike. I make the brake cable, that runs from the handlebars to the back wheel. It it possible to anchor spline points to objects, so that when the handlebars turn, the cable bends and moves in a realistic manner? Can I anchor one end to an object, and the other end to a different object? This is killing me trying to keyframe this stuff. If someone (who am I kidding, it will be Dr. Sassi) can point me in the right direction... That would be swell.
      Thanks in advance
      Simon

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      • Dr. Sassi
        Dr. Sassi last edited by Dr. Sassi

        Hi Simon,

        Typically these Brake Cable tubes are not very flexible, so they have their mind on how to behave.

        I would do those things with tiny Null rigs. Take a look here:

        CV4_2023_drs_23_ANbc_01.c4d

        It has the least amount of calculation, as far as I know..

        Use the Null named handles to rotate. Adjust the P.Z.; of the child objects to change the cable's characteristics. For a little bit more realistic feeling, the "Cube" Null can take a slow Vibrate tag (Priority higher than the XPresso, as in Expression +10)

        If you need it more advanced, perhaps we have a look into Spline I.K., but typically the Null rig from above works.

        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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        • Dr. Sassi
          Dr. Sassi last edited by Dr. Sassi

          P.S.: Here is the Spline IK setup.

          .

          CV4_2023_drs_23_ANsi_01.c4d

          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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          • R
            Rough1 last edited by

            Cheers mate...
            regards Simon

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            • Dr. Sassi
              Dr. Sassi last edited by

              You're very welcome, Simon,

              Please note that I prefer the Null/MoGraph Tracer setup over the Spline IK. But it is equally good if the Spline is used instead of the Joints in the Spline IK setup.

              Cheers

              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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