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Hull and Outfitting

Loft Book Generation Dialog

  • Last UpdatedMar 09, 2026
  • 2 minute read

Use the Loft Book Generation Dialog

  1. Select the format of the loftbook, either the A4/80 col or A3/132 col option from the Output type dropdown list to generate a printable loftbook, or CSV (Comma Delimited) to generate a file suitable for opening with a spreadsheet application.

    The default number of rows and columns per page can be overridden by selecting the appropriate checkbox and entering a new value. The source of the offset data can be from curves or from surface patches.

    • If Curves is selected, then the existing curves are intersected to obtain offset values.

    • If Surface is selected, then offset values are obtained from the surface when crossing orthogonal curves.

    • The Tolerance value is used when checking the distance of 3D curves from the surface. When offset data for a 3D curve is generated, the distance of the offset data from the surface is calculate and the user is warned of any values which exceed the given tolerance.

  2. Select the set of orthogonal curves that are to be interpolated, using the Radio buttons; Sections, Waterlines or Buttocks, in the Using panel at the bottom of the dialog. These curves will appear down the left of the loftbook page.

  3. Select the crossing curves, from the pulldown list in the Crossings panel. The user can also select All, Aft, Fwd or Range.

    • If Range was selected then a list will pop up for the user to pick specific curves to use to cross.

    • If an individual Knuckle curve has been selected, an alternative description to the curve name can be output, by selecting Rename check box and entering the description in the edit box.

  4. Select the Cross button to calculate the intersections.

    This is repeated until all the required curves have been interpolated.

  5. Select the Close button to close the output file.

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