Whish: Boundary

 From: Marc (TELLIER) 16 Jan 2009  (1 of 11)
 Hi, I don't know if this has been suggested but some kind of 'Boundary' tool where you click inside a set of lines and and a closed polyline is created would be quite useful. Have a great Weekend! Marc

 From: Michael Gibson 16 Jan 2009  (2 of 11)
 2327.2 In reply to 2327.1 Hi Marc - select all your curves there and use Construct > Boolean > Union, does that do what you need there? This may need some tuning up for concave outlines I think, but there is stuff in boolean union for doing this task. - Michael

 From: Marc (TELLIER) 16 Jan 2009  (3 of 11)
 2327.3 In reply to 2327.2 Hi Michael, Yes this definitely works, thanks. I did not thought that Boolean operations worked with open curves. Excellent functionality! Marc

 From: Frenchy Pilou (PILOU) 16 Jan 2009  (4 of 11)
 And selection by loops? (after select 2 edges for give the direction)

 From: Michael Gibson 16 Jan 2009  (5 of 11)
 2327.5 In reply to 2327.3 Hi Marc, > I did not thought that Boolean operations worked with open curves. Yeah there are several situations where open curves can be used. Another one is they can be the objects that get cut by closed curves in a difference or intersection command. Like for example here are some open curves (lines) that cross over some closed curves: You can select those open curves and then do a difference or intersection with the closed curves. Here is difference: Here is intersection: Another thing that can work is to have a grid of crossing open curves, like this: Then boolean union should be able to form closed curves for each cell (I dragged the result curves a little bit apart for illustration): However, the curve booleans can tend to be a bit buggier than the regular booleans, you may sometimes run into a stray edge that needs to be cleaned up with the unioning. - Michael

 From: Michael Gibson 16 Jan 2009  (6 of 11)
 2327.6 In reply to 2327.4 Hi Pilou, > And selection by loops? (after select 2 edges for give the direction) Normally a loop is defined by curves that have endpoints that touch - if you look at Marc's example notice that the endpoints do not touch... In the future I do want to add some kind of loop selection helper, but I do not expect for it to handle this kind of intersecting (rather than end-to-end touching) situation though. - Michael

 From: Marc (TELLIER) 17 Jan 2009  (7 of 11)
 2327.7 In reply to 2327.6 Hi Michael, Thanks for the examples, I'll let them simmer till I understand them. I am still not used to using 3d tools in 2d, old habits! A loop-chain selection would be handy. I imagine it could also work on a 3d face if you click on an edge. Maybe a double-click could invoke it. Marc

 From: PaQ 18 Jan 2009  (8 of 11)
 2327.8 In reply to 2327.7 Yes, I vote for the double click loop selection, I'm quite used to that :)