generating closed cells from grid lines

Replies to This Discussion

Permalink Reply by Jon Mirtschin on March 16, 2010 at 4:36am

Sorry, it's not quite clear to me what you wish to achieve. You must already have the perimeter polygons of your cells. If it's of interest, I've been doing some work adding tools to my plug-ins with a designer for cell creation (including operating within Grasshopper). I've added options for creating closed curves, flat surface or extruded polysurface. Options are there for controlling the filleting radius and the offset width. There might be other easier ways when the network is already defined by closed polygons, but my tools traverse a curve network without that requirement.

Happy to help if I can.

Jon

Permalink Reply by kleerkoat on March 16, 2010 at 5:17am

Jon, are you willing to share that definition?

Permalink Reply by Jon Mirtschin on March 16, 2010 at 5:26am

The component calls on the algorithm that is coded into my plug-in. The logic etc weren't the easiest to set straight.

However, if you're prepared to install the plug-in (it's a free evaluation from http://www.geometrygym.com/downloads , once installed it instructs how to request a license), you can take advantage of the algorithm. I'll upload the sample files and images to my blog shortly as test runs for users to try. Happy to help if you need assistance getting up and running.

Permalink Reply by Evan C on March 16, 2010 at 5:22am

looks like a useful def, but no, not exactly what i'm trying to do.

I have managed to get grid lines out - and i want to get closed cells. I'm talking about the smaller grids, not the top-level cell outlines.

Permalink Reply by Jon Mirtschin on March 17, 2010 at 1:09am

Hi Evan,

Sorry, I missed your post yesterday. Now I understand your requirement. I'll post how the grasshopper solution looks using my tools later today.

Permalink Reply by Jon Mirtschin on March 17, 2010 at 8:25am

Well I have success, but not without want of improvements. I don't understand trees,paths well enough, but it would be good if the curves could be seperated/sorted into lists that connect to each other (or are contained in each island). It would speed up my solution, and at present there is a limitation in that my data structure only recognizes a single external border, so that all but one outer cell has an overall cell area also produced.

Anyway, if you wish to have a look, download the latest version of my plug-in, make sure you have a validated license and take a look. With the current solution it adds 5 more components to your existing solution.

Attachments:

• 100316_SubdivideGrid.ghx, 569 KB

Permalink Reply by Evan C on March 17, 2010 at 8:29am

thanks jon - which plug-in is it?

Permalink Reply by Jon Mirtschin on March 17, 2010 at 10:47pm

ssiStructDrawRhino, http://www.geometrygym.com/downloads

If you need help getting up and running, I'm happy to oblige.

Permalink Reply by Evan C on March 18, 2010 at 2:18am

is there a way to install this without admin rights?

Permalink Reply by Jon Mirtschin on March 18, 2010 at 4:34am

It's probably the writing of the registry keys so that the plug-in automatically loads that needs admin writes.

You can open a .msi file in winzip, and manually copy the files in it to a folder of choice (usually C:\Program Files\Rhinoceros 4.0\Plug-ins\SSI, but depending on your Windows version may differ or prevent you from writing files there). Then simply drag the .rhp file over Rhino while it is running. If you have troubles opening the .msi file, I'll upload a .zip file for you.

Permalink Reply by Evan C on March 18, 2010 at 4:37am

if you could upload a zip i would appreciate it

Permalink Reply by Jon Mirtschin on March 18, 2010 at 5:31am

Ok, I added a zip file to the downloads page http://www.geometrygym.com/downloads

In the meantime, I'll see if I can make the installer work for non-administrators without registry writing.

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