Show us what you are doing with gHowl!

Hello everyone,

We are very curious to know how you are using the gHowl components. Please let us know in this thread.

Thanks,

the gHowl team.

Replies to This Discussion

Permalink Reply by Felipe Pecegueiro do A. Curado on October 24, 2010 at 11:15am

This is my first work using gHowl, it was done in april 2010. I used the Wii remote to interact with Grasshopper for a workshop with Philippe Morel, in IaaC. Katia Ageeva is the coauthor of the work.

This work is influenced by cartography and the inherent beauty of lines and forms of the city .

We are looking on the organism of the city as an entity which has been shaped by social, political, economic and topographic factors, illustrating a systemic pattern of human civilization.

Sometimes maps are very abstractive, one can't see all these different processes on schematic pictures.

We decided to increase this abstractive perception of cartography and using technology to create visual transformation of urban drawing.

We looked at the duality of the city systems which is defined by static structures, that exists in some cases for many years and a dynamic behaviour of its inhabitants and users.

Using this concept it's possible to create abstractive pictures from maps. It is impossible to see lines which create roads, houses, etc, but they give logic of direction for new pattern sectors. The original form doesn't exist on the first level, But it's still on the logic of the drawing.

With the idea of city as a mobile and live system, we imputed a colour changing pattern to represent these aspects of the urban spaces. The movement of the colours was implemented with the use of a joystick connected to Grasshopper, via gHowl, Processing and DarwiinRemote and resulted in a motion installation that generates an almost infinite number of different frames.

For more, you can visit http://felipepac.wordpress.com/academic/iaac-masters/cartography-ex...

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Permalink Reply by Luis Fraguada on October 24, 2010 at 11:27am

Thank you very much for sharing Felipe!

Permalink Reply by Riccardo La Magna on November 8, 2010 at 6:50pm

Hi there,

so, this is my first contribution to the gHowl cause. It's not a proper definition, it's rather a proof of concept about self looping in GH. Just a simple def that uses gHowl to workaround the 'recursive data stream' error. Definition attached.

Speaking of which, could David or anyone else enlighten me on what's making technically impossible to loop data in GH?

Cheers!

r

Attachments:

00_self-loop.ghx, 65 KB

Permalink Reply by Kris Hammerberg on November 29, 2010 at 10:11pm

I plan to connect the Passive House Planning Package (an excel based energy modeling tool for the Passiv Haus standard) to Grasshopper and Galapagos to optimize various design aspects (window sizing, etc.)

Now I just need the time at work (or front the cash for a personal Rhino license). Sadly, neither of those are likely any time soon.

UPDATE: Just today I used it to export a binary pattern generated in one grasshopper definition into another. They were quite independently complicated and I felt it was best (for my own sanity) to keep them separate.

Permalink Reply by Thibault Schwartz on January 4, 2011 at 5:43pm

Hi Luis,

I'm trying to link some grasshopper sessions on several local computers, but I'm stuck with a connexion error: gHowl does not seem to see any distant IP, but I can ping everybody and I opened the UDP ports on all the firewalls, routers, etc.... so I really dont understand the problem.

Here is the error message: AddressNotAvailable: this address is not a local address that can be monitored.

The selected IP address is not valid in this context.

Did you already managed to do something similar? Or gHowl is restricted to a single-machine use?

Thanks,

TS.

Permalink Reply by Luis Fraguada on January 4, 2011 at 6:02pm

Hello TS,

We have successfully connected to a cloud of computers several times. It is pretty straightforward. Are all of the computers in the same network? What kind of addresses are you using? Send me some screenshots of your setups and I can comment further.

Luis

Permalink Reply by Thibault Schwartz on January 5, 2011 at 1:50am

Ok, thanks Luis.

The computers are on a local network (I only tried between one wired and one wifi for the moment, I did not checked the other wired PCs), so everybody has a local adress (192.168.101-110). For the test I was testing with the 6000 to 6010 UDP ports.Tomorrow I will try on another network (wired).

Here are the definitions I used:

Thanks,

TS.

Permalink Reply by Thibault Schwartz on January 5, 2011 at 3:07pm

Well, It was definitely a router problem, I have reset everything and it works like a charm! Thanks.

Permalink Reply by Luis Fraguada on January 6, 2011 at 1:23pm

Glad it worked out! Would be cool to see what you guys get up to over there. Share some screenshots, etc.

Permalink Reply by Thibault Schwartz on January 6, 2011 at 2:07pm

Yes! I will :D

Permalink Reply by Michele Semeghini on January 10, 2011 at 2:25am

Hi everybody!

Here you can see one little stuff I've posted on my Vimeo profile.

The link and description:

http://vimeo.com/18615591

"Finally I got around to have some practice with gHowl. Before the first release of the tool, I had tried to link my iPhone both with Processing and Grasshopper, unfortunately without success.
This time everythink seems to work pretty fine, even if a little bit slowly!

TouchOSC is a universal iPhone application that lets you send and receive Open Sound Control messages over a Wi-Fi network using the UDP protocol. Together with his relative editor you can to design custom layouts (see Hexler.net’s for more informations and basic code hexler.net/software/touchosc).
The OSC message contains data coming from a customized touch XYpad and the accelerometer (the latter is the triplet of data: x-rot, z-rot, orientation). Once it has been received, gHowl delivers the content of the message to Processing, in order to provide a minimal visualization of any tracked data.

Maybe, as have already seen in my previous explorations, the test-wall shows adaptive behaviour by changing his porosity: the cursor coordinates on the touch XYpad (on the iPhone) are remapped conveniently to the surface's UV domain to define the varying position of an attractor point.
One further control is provided by a sort of 'switch' for the openings of the wall: the point attractor strategy is suddenly lost whenever the orientation (i.e. y-rot) assumes values within the ranges (0.9;1) and (-1;-0.9). That is, the iPhone is nearly horizontal. Only in that position the remote controller closes the entire panels."

Hope you enjoy it!

Permalink Reply by Michele Semeghini on January 10, 2011 at 2:57am

Ooops: I can't say why, but Vimeo embedding doesn't work properly here...

Let me upload the video...

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