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    Default Offsetting a spline

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    Good Day,
    I use Acad 2000 for my ship modeling & use splines a lot to draw frames of sailing ships. The plans of my latest ship are drawn to the outside of planking & after plotting one particular frame I tried to offset the outside spline 3/64" (1.2mm.), which is equal to thickness of planking. It tells me "cannot offset this object" Strangely, on the same frame there are two other, roughly parallel splines which I CAN offset. Any suggestions will be gratefully received.

    Keith.

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    One reason it would not offset is if the spline is not perfectly planar. A quick way to see if there are any non-planar splines is via the properties panel Quick Select:
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    Default offsetting a spline

    Thanks Seant for your fast reply, but after highlighting planar in the qselect box & changing the other lines as shown in your example, it still does not want to offset. I assume it is a non-planar spline (whatever that means). Is there a way to change it's properties?


    Keith.

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    After finding a non-planar spline (spline that cannot lay flat on one plane, the World XY plane for example), its fit points can be examined one at a time to ensure they’re all constrained to Fit Point Z = 0
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    Hmm! I don't seem to be able to bring up that line for "fit points". I have been looking at HELP & I remember editing this spline by moving a vertex point. Could this have something to do with it? I wish I knew how to attach what is on the screen to this post. As you can tell, I am not a regular user of Acad. Thanks for your patience.

    Keith.

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    Quote Originally Posted by jack nastyface View Post
    I wish I knew how to attach what is on the screen to this post.
    Press the PrintScreen button -it is located somewhere right-up on the keybord. Open any image processing program like Paint or IrfanView and paste the image (CTRL+V). Cut the margins and save the file on your computer. When donne, read this:
    http://www.cadtutor.net/forum/showthread.php?t=8863
    It's nice to be nice, but sometimes is nicer to be evil!.
    Tip: Please do not PM or email me with CAD questions - use the forums, you'll get an answer sooner.

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