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dynamics - closed chain simulation problems

(3 posts) (2 voices)
  • Started 10 months ago by gdl211072
  • Latest reply from gdl211072

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  1. gdl211072

    member
    Joined: Aug '07
    Posts: 12

    Hi All,
    I've created a quick wire simulation based on a dynamic "chain" : 5 vkDynamics objects linked together using vkDynHinge joints. (I then use the objecyts positions to update a 3D curve's control points, that makes a convinving twisting spaghetti)
    It works fine with an open chain - a fixed starting objects and free dynamic linked balls .
    But when I close the loop - when both ends of the wire are fixed - , it behaves strangely. like joints have a stiffness or something; the intermediate free nodes are not totally free and it does not give a free chain.
    and seems that making the end node"fixed" also makes the prvious nose alreday liked fixed in space.
    Any idea ?

    Posted 10 months ago #

  2. hiddentux

    3D Experience Guru
    Joined: Feb '09
    Posts: 378

    Hi,

    Could you post your project here ?

    Posted 10 months ago #

  3. gdl211072

    member
    Joined: Aug '07
    Posts: 12

    Here's the latest - both ends are fixed. notice that "sphere node 4" (before the last node) is free to rotate, but seems fixed , although its dynamic motion is "dynamic".

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    1. wire.mpexp (417.6 KB, 11 downloads) 10 months old
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    Posted 10 months ago #

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