well catenary it's your solution since the lenght of a curve given the
equation y=a*cosh(x/a) is simlply s=a*sinh(x/a) so you can easily
describe what you want.
--
Best regards,
Stefano Tessarin
To follow the path:
look to the master,
follow the master,
walk with the master,
see through the master,
become the master.
Zen poem.
