repost: sinewave and spherical surface

Hi. I am trying to wrap a sine wave via an Interpolated curve to a surface (in this case a sphere) and not having a lot of luck. I am hoping to get some feed back because I dont understand why the incrv does not like the spherical surface, or any non-planar surface. Even if I model manualy in Rhino, the intcrv goes haywire. I am trying to understand this problem, not simply derive a solution though I am posting a couple of my attempts. Thanks for the help

Gavin

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Permalink Reply by Yoann Mescam (Systemiq) on February 10, 2012 at 7:15am

This may help, or not.

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swspullpoints2-Systemiq.gh, 6 KB

Permalink Reply by Gavin on March 11, 2012 at 11:31am

HI Systemig. Sorry to take so long to reply but I have been unexpectedly busy elsewhere, but many thanks for your solution: very neat. I still have problem closing the interpolated curve within the definition though I have tried a variety of things, most notably the boolean curve close input.

Regards,

Gavin

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