Blend surface edge continuity

[Wagner]

Hi!
Why blend surface edge is ALLWAYS different like blend curve from edges?
How to control it? Is there some setting?

Thanks

[davidcockey]

I don’t know the reason for the difference.

To create a blend surface which matches the results of BlendCrv at the edges.

BlendCrv between the edges with the desired continuity…
Sweep2 using the input surface edges as the rails and the BlendCrv results as the sections with the desired continuity at the rails.
MatchSrf the resulting surface and the input surfaces if closer continuity match is needed.

[pascal (Pascal Golay)]

Hi Wagner - if the edges are untrimmed BlendSrf tries to align to the input surface directions. If trimmed, it attempts tp arrange the new surface at 90 degrees to the input edges.

Yes, there ought to be an option, as in MatchSrf, of how to handle this…

-Pascal

[Wagner]

Thanks Pascal

I hope in the future it makes trimmed blend surface edges using “tangential blend curves” as edges.

[Tom_P]

@pascal

somewhere it was written (you wrote ?), that _blendSrf uses _sweep2 under the hood…

so it would be cool to address this issue for
_sweep1
_sweep2
_blendSrf
_matchSrf
in the same manner, same interface, same wording

@davidcockey

My guess is not a bug but an intentional choice when the code was written.

Very desirable when “Align with surface” is selected and the rail is an untrimmed edge or an isocurve would be options similar to MatchSrf for Isocurve direction:

“Preserve isocruve direction” is not included because it is not applicable to creating a surface using Sweep1.