how to create a continuous curve to use in lofting

[ewshebel]

when i want to use a profile as a rail in lofting i cant use projections as they are broken. 

example, the left side of the surface (red) is one curve (it was a spline)

the right side is 3 curves (red, blue, yellow)

[johnsonshiue]

Hi! If possible, please share the f3d file here. The forum experts can help take a look to understand the Lofting behavior better.

Many thanks!

[ewshebel]

the curve i want to use as a rail has 3 points in it. think break points. to use it as a rail the curve has to touch each profile and the problem is there are the break points between profiles so the loft fails.

there is no way to "stich" the curves together? i could use a spline to approximate the curve but that would not be ideal for me.

[wersy]

It is sufficient if the curves are connected tangentially.

[davebYYPCU]

Rails must be tangent connected to chain together, (Rails not Smooth error)

Rails must also connect to each profile. (Rail not connected error)

Rail chains can be selected one segment at a time to find the problem, but you get a big red dot as a clue.

Profiles do not have to be tangent connected.

Projected curves are best avoided, use body edges.

Might help….

[johnsonshiue]

Hi! Though there isn't a merged or joined or stitched workflow in curves, you may leverage Surface Stitch. First, create the piece-meal surfaces based on these curves (using Loft Surface, Ruled Surface, or Extrude Surface). Trim/extend the surfaces accordingly to have good intersections. Stitch the surface bodies into a quilt. You may be able to project the source curves to the quilt or include the surface edges to create the continuous curves.

Many thanks!