Thread: Re: [Sailcut-devel] Sailcut and dinghy sails
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From: Paul T. <pa...@tm...> - 2010-09-06 19:07:28
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On 29/08/10 21:28:41, Robert LAINE wrote: > Dear Paul > the nearest to your request is the twist foot layout which position the > first > panel from the tack to a point on the leech either at 90deg or at maximum > cloth width. > If you take that layout, you can duplicate it and change the conditions > for > > positioning the point on the leech to be at a fix distance above the clew. > > Is that OK? Hi Robert, Thank you for that advice. I've now got the code working so that it generates my new seam. The only problem is that for the two bottom panels it aligns the cloth with this seam instead of at 90 degrees to the leech and I can't see why. Thinking that it may be something to do with the twist foot processing I re-implemented my code based on the cross cut method but it still aligns the cloth along my new seam :( How does the code know how to align the cloth? -- Paul Thomas |
From: Robert L. <rob...@sa...> - 2010-09-09 19:46:32
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Paul, With the cross cut code, all the panels are square to the leech. If you change the width of the first panel then it will intersect the foot at a different place. With the twist foot code the lower panel is running from luff to leech such that it is full foot length panel. the upper seam is not necessarily square to the leech depending on cloth width. The next panel with the narrow width will also run from luff to leech but again not necessarily square to the leech simply because its width is limited to the cloth width. Try changing the cloth width to see if the upper seam become square to the leech like the higher panels. Toward the end of the layout module there is a test to ensure that the panel fit within the cloth width and it adjusts the position of the leech end of the seam if the width of the developed panel exceeds the cloth width. Regards/ Amitiés Robert LAINE http://www.sailcut.com/ free sail design software ---- On Monday 06 September 2010 21:07:19 Paul Thomas wrote: > > Hi Robert, > > Thank you for that advice. I've now got the code working so that it > generates my new seam. The only problem is that for the two bottom panels > it aligns the cloth with this seam instead of at 90 degrees to the leech > and I can't see why. Thinking that it may be something to do with the twist > foot processing I re-implemented my code based on the cross cut method but > it still aligns the cloth along my new seam :( How does the code know how > to align the cloth? |