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Thread: Forcing tangency from arc to line in the pline command

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    Default Forcing tangency from arc to line in the pline command

    I am drawing a center line in the middle of an existing road based on a topo. Using the pline (polyline) command I can draw a straight line. Then use the Arc command to draw an arc. That arc is tangent to the straight line. However when I try to draw another straight line from the arc I just drew (using the Line command), it is NOT tangent to the arc I just drew. How do I force tangency for these line segments?
    TT

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    Default Re: Forcing tangency from arc to line in the pline command

    You entered L to switch from arc to line, enter L again for length and enter the tangent length.

    I'd create the tangents first and use the fillet command to create the arcs afterwards though.
    Tom Beauford P.S.M. - Civil 2019 on Windows 10 Enterprise
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    Default Re: Forcing tangency from arc to line in the pline command

    Try This one maybe it will help you.



    - - - Updated - - -

    Sorry the link didn`t appear in my last comment

    search for the following at youtube
    How to create geometry Tangent or Perpendicular FROM an object in Civil 3D ( Jerry Bartels )

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    Default Re: Forcing tangency from arc to line in the pline command

    Thanks Tom.
    This works and you don't have to type in a distance you can click a length...and this is better for my case.
    Very good.
    By the way, what are the letters, P.S.M. after your name signify?

    Just curious.
    TT

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    Default Re: Forcing tangency from arc to line in the pline command

    Quote Originally Posted by tadthurston725387 View Post
    Thanks Tom.
    This works and you don't have to type in a distance you can click a length...and this is better for my case.
    Very good.
    By the way, what are the letters, P.S.M. after your name signify?

    Just curious.
    TT
    Florida Professional Surveyor & Mapper, but I've spent most of the past 1/4 century using AutoCAD, Map & Civil 3D.
    Tom Beauford P.S.M. - Civil 2019 on Windows 10 Enterprise
    Design Analysis - Leon County Public Works/Engineering Wrap [CODE] tags around selected text
    2280 Miccosukee Rd. Tallahassee, FL 32308-5310
    Ph# (850)606-1516 Home Page

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    Default Re: Forcing tangency from arc to line in the pline command

    No need for Polyline during layout (just when creating the Alignment), as CURVEFROMENDOFOBJECT and LINEFROMENDOFOBJECT Commands are your friends.
    "How we think determines what we do, and what we do determines what we get."

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