RuudB Posted January 22, 2016 Share Posted January 22, 2016 Hello all, I want to offset a nurbs curve, but with the "Offset Nurbs" I'm not getting result. Probably because the nurbs curve is 3d, so the tool needs input for an offset direction. Does anybody know how to set the offset direction, so I'm getting result? I know I can make an offset surface with "Path Extrude", but than I have no idea how to extract an specific outer curve from it. Ruud Quote Link to comment
Patrick Winkler Posted January 22, 2016 Share Posted January 22, 2016 (edited) Hello RuudB, when I use a 3d Point as offsetvalue im getting a error message. It runs correctly when a integer value is used a offset input. regards edit: The Nurbs used for my test was only 2d. With a 3d Nurbs Im also getting no result. Edited January 22, 2016 by Patrick Winkler Quote Link to comment
Patrick Winkler Posted January 22, 2016 Share Posted January 22, 2016 (edited) Here is an alternative way. You can create a offset nurbs with the Move-node Edited January 22, 2016 by Patrick Winkler Quote Link to comment
RuudB Posted January 22, 2016 Author Share Posted January 22, 2016 He Patrick, Thanks a lot for thinking with me! But moving the object, won't make it an offset. When having a curve, the inner offset is a smaller curve, not a copy. I also still trying to find a solution, it should be possible! Ruud Quote Link to comment
AlanW Posted January 22, 2016 Share Posted January 22, 2016 (edited) Hi, I Don't believe that this node "Offset Nurbs" works, hopefully will get clarification on it soon. This network offsets a circle. HTH Edited January 23, 2016 by Alan Woodwell Quote Link to comment
AlanW Posted January 23, 2016 Share Posted January 23, 2016 (edited) Also look into this post. https://techboard.vectorworks.net/ubbthreads.php?ubb=showflat&Number=222385#Post222385 You can manipulate the points on the 3d Nurb. Go down to the network have a look. See Attached for location of changing vertex. HTH Edited January 23, 2016 by Alan Woodwell Quote Link to comment
AlanW Posted January 23, 2016 Share Posted January 23, 2016 (edited) Hi, Copy Offset and Scale. Finally got this to work after studying Luis M Ruiz Example WT-31-How_to_sequence_volumes. But can’t get rid of the first line but that's for another day. Sorted it by changing the start scale to 1. I had 0. I used the get symbol node because it has a 2D origin input where a simple polygon was harder to provide an origin to move by. HTH Edited January 23, 2016 by Alan Woodwell Quote Link to comment
RuudB Posted January 25, 2016 Author Share Posted January 25, 2016 He Alan, Thanks a lot for making this model! Scaling a curve will bring it close to an offset. But unfortunately it isn't a real offset. Still it is interesting! I will try to do something with manipulating all the points on the 3d curve. I guess this should be the start for a real offset. Ruud Quote Link to comment
AlanW Posted January 25, 2016 Share Posted January 25, 2016 Hi, So what you are after is take a polyline and bisect each angle between each connecting segment and move each node the same distance along the bisect line all to the same side. There's something to sleep on. LOL Quote Link to comment
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