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Thread: Choosing which reference line moves with change of dimension

  1. #1
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    Question Choosing which reference line moves with change of dimension

    Hi everyone,
    this is a beginners question really...

    I draw 2 reference lines, neither of them are hosted. I put a parametric dimension for the distance between 2 paralel reference lines. When I change the parameter value, one reference line moves, but it is not the one I want it to move. I tried drawing them in a different order, changing their properties, (strong, weak, not a reference line) and none of it works.

    How do I choose which reference line moves?

    Video: https://autode.sk/2WZx0L5

    Thanks everyone in advance!!

  2. #2
    Forum Addict elton williams's Avatar
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    Your screencast won't load on my phone but try pinning the RL you want you keep static, or dimension it to an origin RP.
    But I have to ask...why aren't you dimensioning the moveable RL directly to an origin RP?

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    I have a lot of RL's and I need all of them to move. It's a parametric plate thickness for a steel girder. Some of them move fine, others don't. Some won't move at all, says they are constrained (clearly aren't and have no host, not even have same alignment). Weird mess. It should all be constrained to an adaptive points plane tho.

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    Forum Addict Andres Franco's Avatar
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    Quote Originally Posted by elton williams View Post
    ... try pinning the RL you want you keep static, or dimension it to an origin RP.....
    +1 for pinning the RP or RL

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    Yes, but to what? And if I create RP, where? Which points do I use?

    I need all of this to move with an adaptive point (hosted by adaptive points plane).
    Once I have the profile with parametric distances between lines, I need to copy the profile (including adaptive point) and create forms, so that forms (plates) change thickness with parametric distances between RL's changes.

  6. #6
    Forum Addict Andres Franco's Avatar
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    Quote Originally Posted by hypno View Post
    Yes, but to what?
    Pinning to itself (if this is well said) I mean if you select your RP and then you use the command PN (Pin) this will pin the object in the work space, the pinned object in this case the (RP or RL) will remain locked and will let the dimension move the other non pinned object, that way the other RP or RL will move accordingly to the modifications of your dimension values, other option is to look for the anchor which allows you to define which of the dimensions will be permitted to move or not, hth
    Last edited by Andres Franco; May 22nd, 2019 at 09:56 AM.

  7. #7
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    Pinning RL I don't want to move, just makes that pinned RL move horizontally when I change the parametric value of the distance between RL I want to move and RL I do not want to move. (nice way for a 'pin' function to work)

    Anchoring won't work, there are too many lines, error that appears is 'overconstrained blabla', it would require 1000000 lines for this to work and it still wouldn't work because of the amount of lines and complexity of the section.

    It's really so simple, I just want other RL to move when I change dimensions. Mirroring doesn't work either. Redrawing and redimensioning in different orders doesn't work either. Revit is apparently scripted so that upper RL always moves and I do not want that in all cases.

  8. #8
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    Create a dimension between the RL you want to stay in place and the origin RP of the family. Click the dimension and click the lock button. That dimension will always stay the same, which will force the other RL to move instead.
    hypno likes this.

  9. #9
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    Thanks steinah6 alot, I worked this out myself too, this worked somehow, this is a random dimension line from RL to Adaptive point but it works.
    Last edited by hypno; May 22nd, 2019 at 01:00 PM.

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