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catenary (Read 1653 times)
Enicolas
catenary
May 2nd, 2008, 2:08pm  
looking for some nice code for simulating a cable catenary, thinking of using particle sim. but new to the stuff, anyone?

preferably catenary must resemble real world catenary
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johnh
Re: catenary
Reply #1 - Mar 22nd, 2009, 3:03pm  
Hi,
I am also looking for any advice in both visuallising catenaries and deriving values.
for the current project I am specifying a number (100+) catenaries by their width(w) and fall(f), and from this I need the length and a formula that can be rendered.
Also to begin with the catenary start points are assumed to be level.
At present I am using Mathematica, but just decided to have a look if anyone in processing has got any advice.

I am an artist, self taught in programming and mathematics and would dearly appreciate any help offered to assist me on my torturous path.
John
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Cedric
Re: catenary
Reply #2 - Mar 23rd, 2009, 12:29am  
Could be easily done by using the trear physic lib.
The cloth example is close to what you want

http://www.cs.princeton.edu/~traer/cloth/
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johnh
Re: catenary
Reply #3 - Mar 23rd, 2009, 1:21am  
Thankyou Cedric,
I will look through cloth.pde
J
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johnh
Re: catenary
Reply #4 - Mar 23rd, 2009, 1:42am  
Is it true there is no mention of Cosh (hyperbolic function) or exponential series here?
Did you code this piece?
J
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Cedric
Re: catenary
Reply #5 - Mar 23rd, 2009, 1:54pm  
Nope i didnt, its just an example of the traer physics librarie you can find here : http://www.cs.princeton.edu/~traer/physics/

you can easily connect X particles with springs and get your catenaries... you can then define the strenght, gravity etc to change its behavior
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wavelength9
Re: catenary
Reply #6 - May 22nd, 2009, 12:49pm  
I'm having trouble running the physics.jar file in the libraries folder of the processing sketchbook(I'm placing it inside the "processing" application package. I have other libraries working fine that I have placed there, but the traer physics library will not run/it cannot find it.

The error is as follows:
"The package 'physics' does not exist. You might be missing a library."

It seems like an easy fix may be to slightly alter the syntax or place it a specific way in the libraries folder, but I have not been able to figure it out.

Any help would be great! thanks

devin
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wavelength9
Re: catenary
Reply #7 - May 22nd, 2009, 12:50pm  
also I am running on mac os x 10.5
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