Sweep1 Sweep2 Incomplete Work-Around

[davidcockey]

Sweep1 and Sweep2 do not sweep the entire length of the open (not closed) rail(s) unless there are sections at both ends of the rails, or there is only one section and it is at the one end of the rail(s). This can be useful in some situations and a problem in others. Perhaps someday options will be added for sweeps to extend the entire length of the rails. In the meantime here are work-arounds which result in sintle surfaces rather than two or more surfaces.

Section(s) only in the middle of the rail(s)

Sweep1 or Sweep2
Select the rail(s) on one side of the section(s)
Select the section(s)
Complete the sweep
DupEdge the edge of the sweep surface

Repeat steps above for the other side of the rails.

The duplicated edges are used as sections at the ends of the rail(s).

Section not at one end of the rail(s)

Sweep1 or Sweep2
Select the rail(s) on on the side without a section at the end
Select the section(s)
Complete the sweep
DupEdge the edge of the sweep surface

The duplicated edge can now be used as the section at the end of the rail(s)

Note that with Sweep2 if the section at one end is only at the end of one rail and not at the end of the other rail, the final sweep will end of one rail, not at the ends of both rails.

[encephalon]

i agree, that would be better to have an option “use entire rail” or something of that sort. alternatively you can also use blend surface for this kind of shape. the curve can be adjusted on all ends and more (add shape) without the need of a sweep shape which is even if you have to extrude the 2 curves first probably faster either.

[davidcockey]

@encephalon

alternatively you can also use blend surface for this kind of shape. the curve can be adjusted on all ends and more (add shape) without the need of a sweep shape which is even if you have to extrude the 2 curves first probably faster either.

How do you use BlendSrf to create a surface which follows one or two “rails”? Perhaps your use of sweeps is different than mine.

[encephalon]

simply extrude the 2 curves, then BlendSrf

add as many “profiles” as wanted with add shape, adjust to your needs (use shift click on a handle’s cp to pull them symmetrically)

adjust where the blend starts or ends if needed

[davidcockey]

Your comment now makes sense. For a blend I use BlendSrf, or Loft followed by MatchSrf. The sections in my example above were not intended to represent a blend surface. Instead they were just examples - could have been a polyline instead.