Possible to Generate a Blobby Bounding Curve?

I'm curious if there is a quick and easy way to do something like the attached image.

Thanks in advance.
Ryan

Attachments:

TestCurves.3dm, 126 KB

Replies to This Discussion

Permalink Reply by kleerkoat on April 27, 2010 at 11:35am

i guess that's a nopey. ;-)

Permalink Reply by David Rutten on April 27, 2010 at 2:57pm

I've got nothing. Nothing at all.

--
David Rutten
david@mcneel.com
Poprad, Slovakia

Permalink Reply by Danny Boyes on April 27, 2010 at 12:21pm

I had a real good go at this, but only managed half the effect needed I'm not back into work till tomorrow (GMT+1) but I could show you where I got to. What was the end result to be used for?

Permalink Reply by kleerkoat on April 27, 2010 at 1:22pm

thanks Danny, I'll give you some more info later tonight.

Permalink Reply by Danny Boyes on April 28, 2010 at 3:03am

This is where I got as far as:

The end result is a delaunay edges component with some culling of the edges greater than 1. I'm sure the same theory can be applied to a mesh to get a surface, But I'm not sure how to get the boundary out or if it's possible.

Permalink Reply by robert cervellione on April 27, 2010 at 3:27pm

you could probably approximate something like this with the 2d convex hull. but you would have to generate points that represent the objects.

Permalink Reply by Jacek Jaskólski on April 27, 2010 at 5:54pm

Not exactly the thing you want and only a sketch of a solution, but here's my contribution to the brainstorm, maybe someone can pick it up from there...

Attachments:

rubber_band_test_02.ghx, 270 KB

Permalink Reply by Jacek Jaskólski on April 28, 2010 at 5:19am

So here's my next attempt:

Though again - it's not exactly what you wanted - the bounding curve will "jump the gaps" with concave or flat curves only... so you won't get the effect shown on the bottom of your image.

Attachments:

rubber_band_test_03.ghx, 343 KB

Permalink Reply by Evan C on April 28, 2010 at 8:12am

I've been working on a method - it's not working as well as the ones below but maybe the different approach can spark some new ideas...

basically i throw a bounding box around the input curves, draw lines radiating out from the centroid, pick the furthest point along each line & connect 'em. Just a quick sketch.

Attachments:

100428-Rubber Bounds.ghx, 147 KB
100428-Rubber Bounds.3dm, 31 KB

Permalink Reply by Evan C on April 28, 2010 at 8:31am

here's a slightly better version.....

Attachments:

100428-Rubber Bounds2.ghx, 248 KB

Permalink Reply by kleerkoat on April 28, 2010 at 11:02am

thanks to everyone for the help and some definitions too.

i'm hoping that this will solve a major flaw in a definition i made to create a planking effect on the curves.

thanks again, and please by all means, keep the ideas flowing. This next definition I make will be the 7th version and everyone of them have been done differently to try and compensate for a few hiccups that I can't figure out why they are failing.

Permalink Reply by Evan C on April 29, 2010 at 3:37am

here's another idea - based on rotating bounding boxes.