Catenary for AutoCAD - JTBCatenary
This Catenary program for AutoCAD makes it easy to create or draw a catenary curve as a polyline by specifying the start and end point and the length and optionally a diameter (width). This can be useful for drawing freely hanging cable, hose, chain, transmission line, anchor line (anchor rode), cord, rope, string, suspension bridge cable, arch, hawser, wire or the like.
The current version is creating a catenary line using the catenary formula y = cosh(x) = (e^x + e^-x)/2 and numeric analysis that results in a good enough curve for many purposes. The program does not take into account the tension of an elastic catenary, sag, weight and so on. Support for this can be added based on user requests.
A parabola is different from a catenary. The catenary is the solution to a
differential equation that describes a shape that directs the force of its
own weight along its own curve, so that, if hanging, it is pulled into that
shape, and, if standing upright, it can support itself. The parabola does
not have the same property.
Catenary described according to Wikipedia:
In physics and geometry, the catenary is the curve that an idealized
hanging chain or cable assumes under its own weight when supported only at
its ends. The curve has a U-like shape, superficially similar in appearance
to a parabola (though mathematically quite different). It also appears in
the design of certain types of arches and as a cross section of the catenoid
-- the shape assumed by a soap film bounded by two parallel circular rings.
JTBCatenary is available as an AutoCAD app on the Plug-ins tab.
Trial version available for download: JTBCatenaryTrial.VLX
JTB Catenary trial is available as an AutoCAD app on Autodesk Exchange Apps.
Limitation of trial is that the length is fixed to 10 meters. When purchased it can be used without restrictions.
If purchase has been done via Autodesk Exchange Apps the download is available on the Autodesk Exchange Apps My Downloads page. Sign in with the same account used when purchasing.
Customers can contact us directly for access to download the full version.
AutoCAD 2000 or later or verticals based on AutoCAD where AutoCAD 2014 is the most recent version supported.
All verticals or flavors based on AutoCAD should be working like AutoCAD Architecture (ACA), Architectural Desktop (ADT), AutoCAD Civil 3D, AutoCAD Electrical , AutoCAD Map 3D, AutoCAD Mechanical, AutoCAD MEP (AMEP, ABS), AutoCAD P&ID, AutoCAD Plant 3D.
BricsCAD 10 and newer can be supported upon request.
Compatible with those operating systems AutoCAD runs on
like Windows Vista, Windows 7, Windows 8 and Windows 8.1.
25 EUR for one license or less depending on the amount of licenses.
JTB World is a VAT-registered Swedish company. If your company is outside Sweden and is VAT-registered in EU (European Union) contact us by email before purchase with your company name, VAT-number and what you want to purchase and how many licenses so we can email an invoice and exclude the VAT (25%) on the purchase.
When you purchase with PayPal you can use your credit card or bank account where available. You will be emailed the license (this is done manually but normally within 24 hours). If you want to purchase for example 15 licenses add first 10 to the chart and then add 5.
Contact us for a quote and include how many licenses you want to purchase and your preferred payment method. If you have a really many users that you want to give access to this software we can discuss a discounted price based on your particular situation. Educational discounts available. Network license needs can be met.
The license is perpetual and support is included. If you have more than one computer and you are the only user of the application one license is enough.
PayPal, share-it, Mastercard/Eurocard, Visa, American Express, and Diner's Club online are accepted. Alternatively, there is support for bank transfer/wire transfer, or Checks and Money Orders through postal mail. Online transfers via giropay and Nordea Solo are also supported. Refund policy.
To pay by PayPal you can also send payment to the account of firstname.lastname@example.org at www.paypal.com.
Easiest is to use the AutoCAD app installer that also puts a button on the Plug-Ins Ribbon tab.
Download JTBCatenaryTrial.VLX or the full version JTBCatenary.VLX and put it in any folder of your choice.
Appload command can be used to load the VLX. To make sure it is loaded automatically click on Startup Suite Contents button and add it.
acaddoc.lsp can also be used.
The command to start the program is JTBCatenary (JC for short).
The program prompts are:
Note that the length must be longer than the distance between the start and end points.
The resulting catenary will be created in the current drawing (DWG or DXF) as a polyline with the width being the same as the diameter.
If you want other features added like tension, 3D, Catenary curve through three points or support for other CAD programs like Autodesk Revit, BricsCAD, ZWCAD+ or other DWG editors feel free to contact us with your wishes.