Merging 2 sets of lines in software

Discussion in 'Software' started by John Beavis, Jun 28, 2022.

  1. John Beavis
    Joined: Dec 2020
    Posts: 1
    Likes: 0, Points: 1
    Location: New Zealand

    John Beavis New Member

    Is it possible to take multi sets of offsets (chine sailing dinghy) to compare the differences between the individual boats, I have Hullform and Delftship.

    I have seen somewhere in the lovely web world where it showed 2 sets of lines and highlighting the differences.

    Thanks for your comments.
  2. Skyak
    Joined: Jul 2012
    Posts: 1,461
    Likes: 144, Points: 63, Legacy Rep: 152
    Location: United States

    Skyak Senior Member

    The comparison you want to make is of the fully developed hull shapes. The offsets you normally get for a chine dingy are for flat cut patterns.
    I don't see any easy way to get around making the fully developed hull shape.
    Normally I work in the fully developed hull shape and only think of cut patterns as an output of the intersection of the conic surfaces (the chines). This is the normal design flow. What you ask is reverse engineering.
    With the fully developed hull shapes you can superimpose them and make pretty pictures that still might not be meaningful if you don't apply forces correctly and have the waterline wrong.
  3. jehardiman
    Joined: Aug 2004
    Posts: 3,740
    Likes: 1,130, Points: 113, Legacy Rep: 2040
    Location: Port Orchard, Washington, USA

    jehardiman Senior Member

    Welcome John.
    Is it possible? YES!
    Is there software to do it automatically? I know of none.
    Most likely what you were looking at was a specifically drawn example to illustrate some specific points. Easy to do with pen and paper.
  4. wet feet
    Joined: Nov 2004
    Posts: 1,361
    Likes: 414, Points: 83, Legacy Rep: 124
    Location: East Anglia,England

    wet feet Senior Member

    With the software mentioned,it may be challenging.With other 2D drafting programs and some patience it is quite possible to use different layers,and different colours for each layer to superimpose one layer on the other to see immediately what the differences are.Will either of the programs in question allow this?I'm reasonably sure LibreCAD would and I have no doubt that Autocad and Rhino will.

  5. HJS
    Joined: Nov 2008
    Posts: 479
    Likes: 126, Points: 43, Legacy Rep: 288
    Location: 59 45 51 N 019 02 15 E

    HJS Member

    In Delftship you can add a drawing as a background image.
Forum posts represent the experience, opinion, and view of individual users. Boat Design Net does not necessarily endorse nor share the view of each individual post.
When making potentially dangerous or financial decisions, always employ and consult appropriate professionals. Your circumstances or experience may be different.