Unroll curves?


#1

Hey guys,
I was wondering if there was a way to unroll curves the same way that you can unroll a surface?


(Wim Dekeyser) #2

Isn’t an unrolled curve just a straight line with the same length?


#3

Not necessarily straight. Think of a series of curves on a curved surface, kinda like unrolling a line drawing logo from a Coke can.


(Wim Dekeyser) #4

If you have the surface and the curves you can use the CreateUVCrv command.


#5

Close! The curves just aren’t part of the surface, they are projected onto it and need to be unrolled along with the surface.


#6

Is this command what are you looking for?
http://docs.mcneel.com/rhino/5/help/en-us/index.htm#commands/unrollsrf.htm?Highlight=unroll


#7

CreateUVCrv should do that as wim suggested. It depends on what kind of surface it’s drawn on as to whether it’s accurate…


(David Cockey) #8

UnrollSrf (see link in Nosorozec’s post above) unrolls curves on a surface which is unrolled. The surface has to capable of being unrolled, ie developable.

  • UnrollSrf
  • select surfaces to be unrolled
  • Enter
  • select curves to be unrolled
  • Enter
  • Delete the unrolled surface if you don’t want it

Or do you want to flatten curves on a non-developable surface?