Create and manage sections for a ripple wave texture

I'm doing some experiments on grasshopper3d, but i'm stuck with this test.

I would like to recreate something that looks similar to the immage of the isocurve, i saw a couple of tutorial but i want recreate this without the support of other plugins, always if it's possible.

As you can see i learn to put the lines on a planar surface on a curved surface. I found the points of the curves, so now in theory i can start to do the sections with arc or something.

My problem i think is simple for you, i need to manage the points to recreate the section arcs, so i need a middle point to do the third point of the arc.

So do you think is right way to do that? someone can help me to understand how to manage and how to create the sections?

Thanks

Replies to This Discussion

Permalink Reply by Martin Siegrist on April 23, 2015 at 1:48am

I did something similar a while ago. The file is at home but this is a rough step by step concept:

create at least two input lines

divide curve into let's say 10 segments

dispatch

move every other point up or down

merge

interpolate curve

and then loft

Permalink Reply by Martin Siegrist on April 23, 2015 at 4:54am

Try flipping the direction of the offset curve.

For the interpolated curve you need to flatten the points coming out of merge or use a weave component.

Sort points along curve sorts your points for the interpolate curve

Permalink Reply by Martin Siegrist on April 23, 2015 at 5:54am

I could play around with this kind of shapes all day long...

Permalink Reply by Pieter Segeren on April 23, 2015 at 7:59am

Hi Marco, here is what I did earlier:

Attachments:

Embossment_PSG.gh, 19 KB

Permalink Reply by Pieter Segeren on April 23, 2015 at 8:58am

The sorting of the curves is clear I hope. After that I shifted the list of curves -1 (with Wrap = False) to get all curves except the top one, and also shift that same list of curves +1 (with Wrap = False) to get all the curve except the bottom one.
I then created arcs from the start points from the first list to the start points of the second list. The start direction of the arcs is set by the vector. Then the Sweep2Rails wants - well- two rails, and the arc we just made. I noticed I forgot to finish it with a BrepJoin component, to make it a single Brep.

P.S. what kind of dog is that under the blanket?

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