Heinz Isler

I am studying the shells of Heinz Isler in one of my classes, in which I am to analyze his surfaces in a computational/parametric manner. Since most of his work was based upon his physical inverted membrane models, I am not sure of how to approach beginning to digitally model his work within grasshopper in an intelligent manner?

I have been looking into cloth modeling, spring particle system modeling (http://www.grasshopper3d.com/video/springparticle-system-1?commentI...), as well as surface relaxation.

Any suggestions, resources, or definitions you guys can point me towards would be a great help.

Replies to This Discussion

Permalink Reply by taz on February 19, 2010 at 4:18pm

You'll have to wait for Daniel Piker to release Kangaroo...

Permalink Reply by William Su on February 21, 2010 at 7:59pm

anyone?

Permalink Reply by Daniel Piker on February 21, 2010 at 10:44pm

This requires an iterative approach, so is more of a scripting than a grasshopper challenge.

As Taz says, I am developing a tool which allows this and other physics based form finding methods within GH, but if you want to have a go yourself, then maybe start by looking at the work Axel Kilian did with Simon Greenwold's spring system - CADenary tool.html

Permalink Reply by Paul N Jeffries on February 22, 2010 at 3:58am

The process itself is fairly simple, but requires a lot of work to implement. Essentially, you treat the fabric as a net of 1D springs with mass lumped at the nodes where they connect. Then you iteratively:

- Find the tension in each spring
- Calculate the resultant force at each node due to the tension in the attached springs
- From this force, find the resultant acceleration on the node
- Move all the nodes
- Repeat

The tricky thing is just organizing all this data so that you know what is connected to what. One of my old lecturers from university (she was a big Heinz Isler fan herself) wrote a book that goes into the mathematics of this in some depth, which I found useful when I was writing my own version of this: http://books.google.co.uk/books?id=NNPJ3lpfBIIC&dq=tension+stru....

Permalink Reply by taz on February 22, 2010 at 9:56am

Or use Rhino Membrane

Permalink Reply by corneel cannaerts on March 11, 2010 at 12:53pm

i did a quick and dirty version of a catenary modeller in processing:

http://www.introspector.be/index.php?/research/dook/

Feel free to mess with the code

you could use some thing like osc to get the data from processing to GH.

Although waiting for the kangaroo might be easier ;)

Permalink Reply by William Su on February 22, 2010 at 3:04pm

What about if I didn't necessarily need the definition to create 100% accurate in terms of physics, etc., just something that would behave in a similar manner using point attractors and a grid of points and such to simulate cloth and points where the cloth is fixed?

Permalink Reply by taz on February 22, 2010 at 3:31pm

Maya nCloth

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