Offset division on surface issue

Hi there,

I made two different definitions to divide surface and offset curves. On first surface definition works fine as thE surface is planar. The other definition is for curved surface and I try to make it work. In this case the expression -x dont change anything so i cannot go on with this def. Does someone has any clue?

Thanks

Attachments:

OFFSET.3dm, 43 KB
OFFSET.gh, 28 KB

Replies to This Discussion

Permalink Reply by Blisza on November 23, 2014 at 5:13am

no clue?

Permalink Reply by David Stasiuk on November 23, 2014 at 8:54am

it'll be easiest for you to construct this as a mesh as early in your definition as possible, and it will all run much lighter.

Attachments:

OFFSET.gh, 13 KB

Permalink Reply by Blisza on November 24, 2014 at 2:24pm

This is another way to do this and I must say half shorter definition than mine and less complicated. Really great, I'll work on that too. Thanks a lot!

Permalink Reply by nikos tzar on November 23, 2014 at 9:35am

Hello Blisza,

Not sure this is of any help but I took a look at your definition and I think I can tell you why it doesn't work.

The thing is that a planar surface is internally converted into a planar polyline curve inside the [offset] component and can then be offseted on its plane.

On the other hand a non-planar surface cannot be translated to a planar curve and the result is that each segment of the curve is offseted individually, giving you an undesired result (you can see that if you un-flatten the output of the offset component (For every closed curve, 4 curves are produced).

I believe your only chance is to try to do this another way, maybe extruding rectangular sections along the surface on U and V... I can't tell for sure...

Permalink Reply by Blisza on November 24, 2014 at 2:27pm

Thanks for reply, agree on that, I tried to join curves and rebuild them but still they work like they are unjoined. Anyway, constructing it as mesh from the beginning, (David Stasiuk method) is the best for it.

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