Adjust seam

Hello,

When using convex shapes it becomes complex to loft surfaces (that would be subdivided)

Could it be possible to use multiple points to adjust the seam?

Thank you

Attachments:

adjustseam2.gh, 22 KB

Replies to This Discussion

Permalink Reply by Joseph Oster on June 24, 2016 at 6:41pm

You can play a lot of games moving the seam of both curves (inner circle and/or outer curve), getting some decent symmetrical loft surfaces, but I'm not sure you'll ever loft a surface as cleanly as what you can get like this:

But dividing that surface with 'Isotrim (SubSrf)' fails, returning a divided bounding rectangle.

Attachments:

adjustseam_2016_Jun24a.gh, 22 KB

Permalink Reply by daniel assayag on June 24, 2016 at 7:21pm

Well,

i was trying different methods, like network surface, edge surface, sweep, loft method, so i could get a shape that might be isotrimed. I noticed that the bounding rectangle that appears doesnt really apply to the surface, as, maybe it could when you bake / rebuild a boundary surface..

What if we a method of shape analysis, or that there could more control to "tile" the shape. or maybe being able to manually move the subdivisions of a shape.

But maybe what i say is nonsense.

Permalink Reply by Joseph Oster on June 24, 2016 at 7:43pm

I'm not sure what your objective is but if you want to divide the "clean" surface generated by the 'Boundary' approach, you might want to look at what I did in this thread:

http://www.grasshopper3d.com/forum/topics/problems-with-trim-solid

Basically dividing the edges and connecting points with 'Curve On Surface (CrvSrf)', then using 'SrfSplit' to divide the surface.

Permalink Reply by daniel assayag on June 24, 2016 at 7:45pm

Thank you Joseph for your help

As always

Permalink Reply by Joseph Oster on June 24, 2016 at 7:10pm

By the way, this is what I meant by "games moving the seam of both curves". I'm using a slider to move the seam of the circle, then using 'Crv CP' to adjust the seam of the outer curve to match the Start/End point of the circle. 'Isotrim (SubSrf)' works but is probably not what you want? (because the 'Loft' surface is not what you really want either)

Attachments:

adjustseam_2016_Jun24b.gh, 25 KB

Permalink Reply by Joseph Oster on June 24, 2016 at 7:21pm

Oh yeah, one more thing... Skip the 'Seam' components and just set the 'Loft Opt' 'Adj (Adjust Seams)' input to 'True' instead of the default 'False' - much simpler!

Attachments: