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  1. #1
    Forum Newbie
    AutoCAD 2017
    Join Date
    Aug 2017

    Default Automatic Unique references

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    I'm currently just getting to grips with both dynamic blocks, fields and data extraction, and I was having a play trying to figure out how to do the following.

    I want to create a dynamic block which allows me to draw a rectangle, then position it using the block base point, then stretch the rectangle to a any given size. This part is easy. Now I want to take certain measurements from that rectangle, and populate a table with that data including the addition of a quantity column showing all the blocks with identical values. Also not too challenging.

    The next part is where I struggle however. I need to assign each row of the table with a unique reference number, and then I need to take the data out of this reference number column and show it on the rectangle block in the form of a label.

    Alternatively, (but with the same outcome) I need to create a "reference" attribute which compares certain values of the block to other variations of the same block, and then either, applies the same reference as any matching blocks, or gives it a new reference if there are no blocks with identical values.

    Does anyone have any ideas how this could be accomplished? It would save me weeks of my life. FYI I'm using Acad2017

  2. #2
    Luminous Being Dadgad's Avatar
    AutoCAD 2013
    Join Date
    Nov 2011
    At the confluence of worthlessness & invaluability


    Welcome to CADTutor ngowans8.

    Check out Lee Mac's incredible selection of lisps on his site, dig deep, as you will be well rewarded.

    Lee is the man!
    Thanks Lee!
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  3. #3
    Quantum Mechanic BIGAL's Avatar
    Civil 3D 2016
    Join Date
    Dec 2005


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    Have you looked at Xdata you can add a "id" to say your rectangle then retrieve it later. The other may be to make a block 1x1 and use scale to set the x & y values you can have a atribute but its set to invisible.
    A man who never made mistakes never made anything

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