Hull and Outfitting

EXTRAPOLATE

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EXTRAPOLATE

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Last UpdatedJan 05, 2024
2 minute read

Purpose

To linearly extrapolate two-dimensional curves.

Syntax

EXTRAPOLATE ( BUTTOCK ) ( /ALL                   ) ( /X= ) ( $N $N )
                      ( $N THRU $N < INC $N > ) ( /Z= )
                      ( $S    )
            --------------------------------
            (STEM ) (/ECCENTRICITY)
            (STERN) (/HALFSIDING)
                    (/TRANSITION)
             -----------------------------------------------
            ( CURVE )           ( /X= ) ( $N $N )
            (STEM ) (/TANGENT)  ( /Y= )
            (STERN) (/TANGENT) ( /Z= )
              (FOB)
            (FOS)
            (KNUCLE ) ($W)
            (TANGENT)
            (PLINE )
            (CAMBER )
            (SHEER )
             -----------------------------------------------
            ( SECTION ) ( /ALL                 ) ( /Y= ) ( $N $N )
                    ( $N THRU $N < INC $N > ) ( /Z= )
                    ( $S                  )
            --------------------------------
            PMB ( AFT     )
            PMB ( FORWARD )
            ---------------------------------
            ( STEM ) ( /PROFILE ) ( /X= ) ( $N $N )
                     ( /RADII   ) ( /Y= )
            ( STERN ) ( /PROFILE )
  ( /RADII   )
             ------------------------------------------------
             ( WATERLINE ) ( /ALL                   ) ( /X= ) ( $N $N )
                       ( $N THRU $N < INC $N > ) ( /Y= )
                          ( $S                    )

Description

This command allows the user to linearly extrapolate 2-D curves such as Stem and Stern Profile and Radii, Section, Waterline and Buttock curves. The user may extrapolate the current curve or a series of stored curves.

The method used calculates the tangent at the start point selected by the user, extrapolates a new point at another user selected position and then re-fits to the data points.

When extrapolating stored curves it is advisable to make sure that the curves to be extrapolated have been fitted to the data points as this command will automatically re-fit the curves through the points stored with that curve.

Examples

EXTRAPOLATE CURVE /Z= 10.5 13.87
EXT SEC 9 THRU 10 INC .25 /Z=11.0 12.25

Hull and Outfitting

EXTRAPOLATE

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EXTRAPOLATE

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