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Thread: Site Contours

  1. #1
    Registered User
    Join Date
    Jan 2007
    Location
    Welwyn Garden City,UK
    Posts
    16

    Site Contours

    Could anyone please advise on the best workflow to get site contours in dxf format into LW and then to produce a smooth mesh representing the land. I have tried importing dxf into LW with LW directly and using LWCAD but seem to get no results.
    Also does anyone use Terragen or World creator to get exact topography?
    I’m new at this so please excuse naive questions
    Thanks

  2. #2
    areté adk's Avatar
    Join Date
    Feb 2003
    Location
    Melbourne
    Posts
    1,507
    Assuming that the site contour points are at the right elevation in the DXF ...

  3. #3
    TrueArt Support
    Join Date
    Feb 2003
    Location
    Poland
    Posts
    8,277
    If you imported mesh that does not look too good i.e. has many triangles in weird locations, you could try to retopology mesh using splines.

    To make it easier, I made special tool Trace Spline


    It is part of EasySpline http://easyspline.trueart.eu

    You select the first point and last point, and press Trace Spline.

    Tool is analyzing geometry to find the closest route between these points using mesh between them and adding the all points to newly created spline.

    Then you repeat it with vertical pair of points.
    etc. etc.
    And after a few seconds you have spline cage ready.


    Spline cage has just essential points of your original mesh.


    You press EasySpline previewer, and you can immediately see them virtually patched.

    Then you can use Spline Density tool to reduce number of points in spline cage.
    https://www.youtube.com/watch?v=wfgTdxWSCCk
    It knows which points are connected with other splines in spline cage and leaves them alone (otherwise spline cage would be damaged).

    Then you can freeze spline cage with final resolution using Freeze Spline interactive tool.

  4. #4
    Thank you for your work, a very effective tool!

  5. #5
    Registered User
    Join Date
    Sep 2020
    Location
    pakistan
    Posts
    4
    Great information and brief info

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