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General HydroStatics
Ship Stability Software |
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Command of the Week
(New or interesting aspects of GHS that you may not know about) |
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The Deepest Point
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GHS is known for the application of commands in creative or unexpected ways. Recently, a good example of this arose from a relatively simple request: how to find the deepest point on a vessel with non-zero heel and trim?
For those who conjecture that there always exists some combination of macros which will provide a solution to any problem, we salute your can-do attitude: you are a programmer at heart. In this case, however, ground points actually offer a less laborious solution, despite that you may not be interested in modeling a grounding scenario at all. Thanks to the algorithm employed by the GROUND /FLOOR command, you can very easily identify the deepest point on a hull component in a given condition by simply limiting the /NPoints parameter to 1 and setting an arbitrary /FLOOR depth. More than one hull component you say? No problem, just issue a single-pointed GROUND /FLOOR command for each component and then select the point with the deepest depth (in this case 7.45 feet to the skeg). |
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read fv.gf
he 5 tr 3 dr 6 so we lcg tcg `di status profile, plan:be /sync ground (hull\hull.c) /floor:10 /npoints:1 ground (hull\skeg.c) /floor:10 /npoints:1 report ground report `st gr:all report close /preview |
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| But, given our profession, we also wrote a macro using the WPA and origin DEPTH system variables. It luckily returned the same result. The conjecture still stands, but its proof remains elusive. Find the run file here. |
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Questions, comments, or requests?
Contact Creative Systems, Inc. USA phone: 360-385-6212 Fax: 360-385-6213 Office hours: 7:00 am - 4:00 pm Pacific Time, Monday - Friday Mailing address: PO Box 1910 Port Townsend, WA 98368 USA Click here for an index to this and previous COWs |