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lamensterms posted a topic in AutoLISP, Visual LISP & DCLHey guys, We are doing a little chute-work in the office at the moment, and have had the need to develop some bend/folded plate work. The items we seem to be spending the most time on are square-to-round transition segements, where the chute walls are made of 1 plate, folded to the desired shape. Im sure most of you are familiar with this type of work - but I was just wondering if anyone knew of a good routine which will easily produce the developed/flattened plate of these transition segments. We have been using this site... http://www.sheetmetalguy.com/transition.htm... which does work quite well - when it works (it seems the site is quite old, and will only run in IE... sometimes). So i was thinking, it would be great to have a routine which would ask the user to select a 2D square/rectangle and a 2D circle... and the routine would calculate the distance between the 2 shapes (Z value) and then produce a 2D flattened profile of the required shape. Anyone know of a routine such as this? I do have a little LISP experience, but I imagine something like this could be quite involved and over my head. Thanks a lot for any help. Cheers.