gHowl

Information

gHowl is a set of components which extend Grasshopper's ability to communicate and exchange information with other applications and physical devices.

Website: http://www.grasshopper3d.com/group/ghowl
Location: In Between
Members: 644
Latest Activity: on Saturday

Download the latest set of gHowl components:

gHowl_r50 and example files

Check out the gHowl videos page where you can see how people have been using gHowl.

Our users have connected Rhino and Grasshopper to various protocols, platforms, and softwares including:

Processing

Excel

Open Office

RSS

Arduino

Kinect

Reactivision

openFrameworks

Google Earth

Resolume

VVVV

Pure Data

max/msp

Maya

Kangaroo

TouchOSC

iPhone

Android

Components:

UDP:

UDP Components now have the ability to send and receive to a Multicast group. To send or receive to a Multicast group, make sure you use the IP Range of 224.0.0.0 - 239.255.255.255.

OSC functionality is provided by the Bespoke OSC Library by Paul Varcholik.

Network Source - Tests the connection of your machine to a network.

UDP Send - Allows the sending of UDP messages over the network. Also allows the sending of OSC messages to OSC enabled software and hardware devices. (Deleting this component in 0.7.0057 crashes GH / Rhino)

UDP Receive - Allows the sending and receiving of UDP messages. Also allows the reception of OSC messages and bundles (from Reactivision for example).(Deleting this component in 0.7.0057 crashes GH / Rhino)

OSC Channel - This component allows the storage of a single OSC Channel. Change the component's nickname to store that address' data.

OSC Dispatch - This component allows the storage of data from multiple OSC addresses.

Spreadsheet:
The spreadsheet components leverage the OpenXML engine. You must have OpenXMLSDKV2.msi installed in order for these components to work. These components read and write *.xlsx files. Supports numerical values and strings.

Spreadsheet Reader - Retrieves spreadsheet data from a file stored on your computer.

Spreadsheet Writer - Allows you to write a spreadsheet file.

XML:
These components retrieve xml data from local and web sources (such as RSS feeds).

Pachube - Retrieves data from a Pachube feed. Must have a valid Pachube API. (Deleting this component after making a connection in 0.7.0057 crashes GH / Rhino)

Pachube Update - Allows you to update a Pachube Feed. The component has variable inputs to enable streaming to various datastreams. Must have a valid Pachube API.

XML Parser - This component parses an XML file stored on your computer or on the web.

XML Writer - Writes out XML

GEO:

These components aid in the mapping and conversion of coordinates from GPS enabled devices to XYZ coordinates.

Format GEO - Takes NMEA formatted GPS coordinates and converts them to Decimal Degrees.

XYZ -> GEO - Maps XYZ coordinates in Rhino/Grasshopper to Longitude, Latitude, and Altitude.

GPS -> GEO - Maps Longitude, Latitude, and Altitude coordinates to XYZ

Elevation Service - This component returns the elevation at the coordinates you supply as inputs. It queries the Google Elevations API to do this. There are some limitations on usage, so be warned.

KML:

KML Exporter - Exports points, curves, and meshes to a KML File. Breps should be meshed before exporting. Brep support will be added soon. Object attributes such as color, transparency, line width, line color, etc will be added soon.

KML Attributes - Adds Fill Color, Line Color, and Line Width to Exported KML Objects.

Discussion Forum

gHowl: Current Status 6 Replies

Currently, the gHowl components support the following:Spreadsheet In: Reading of .xls, .xlsx, and .ods files (requires the installation of Open Office)Spreadsheet Out: Writing of Excel or Open Office…Continue

Tags: open, office, xml, pachube, excel

Started by Luis Fraguada. Last reply by jm Jun 12.

Ghowl xml import /export 5 Replies

Hey againHow does it work if you want to import and export the same .xml file, when the ghowl xml import has 4 output parameters, and the ghowl export has 2 input parameteres ?RegardsContinue

Tags: export, xml, Ghowl

Started by Jesper Hildebrandt Andersen. Last reply by Jesper Hildebrandt Andersen Jun 11.

.xml export 5 Replies

I used ghwol for importing an .xml file, and ghowl for making a string out of it, connecting it to a panel. But since its not possible to stream the file as .xml, what can you then do to get the data…Continue

Started by Jesper Hildebrandt Andersen. Last reply by Giulio Piacentino May 21.

Pachube Read 2 Replies

pachube_read_01.ghI was…Continue

Started by konrad k sobon. Last reply by konrad k sobon May 9.

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Comment Wall

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Comment by Luis Fraguada on November 6, 2011 at 5:18am: What I do is to bring in a screenshot from Google Earth through the picture frame command in Rhino, I scale it according to the scale indicated (to 1:1) then I pick a point in XYZ which I can easily look up in google earth, such as a sharp corner. I bring in the xyz to gh, and I write in a panel its corresponding {lon,lat,0}. You can then use the XYZ>GEO component to convert any points you draw or generate in Rhino / GH from XYZ coordinates to {lon,lat,alt} coordinates. You can now feed these into the elevation component.

Comment by Igor Mitric on November 5, 2011 at 8:33pm: Or to draw a GPS route with http://www.gpsvisualizer.com/draw/

and use that for coordinates and terrains line...

I will try this one..

Still if you have some cleaner way, I am open :)

Thanks

Comment by Igor Mitric on November 5, 2011 at 8:27pm: Thanks for that!

How do you get a list of a points (coordinates), do you manually draw them on google earth map with placemaker, than read a coordinate and then assign them in a GH?

I hope not :)

I manage on this way, following your explanation somewhere in forum, to send a model in to google earth.

Thanks

Comment by Luis Fraguada on November 4, 2011 at 9:51am: Hello Igor,

The Elevation Service needs you to provide a coordinate like this:

{longitude,latitude,0}

*notice the brackets, it is formatted like a GH point.

Longitude and latitude are in decimal degrees. The component returns the elevation at that point. Let me know if you need any more information.

Comment by Igor Mitric on November 3, 2011 at 6:42pm: Hallo Luis,

Can you maybe explain a GetElevation option.

Do I need to get familiar with google maps Api pr. and get data from them, and than plug this data to GE node?

Thanks

Igor

Comment by Luis Fraguada on October 14, 2011 at 2:43am: Hello Lauren,

Open Office is not necessary anymore. Everything you need should be in the gHowl download. Check out the 'Dependencies' folder for an installer which will enable spreadsheet functionality. Which version of Rhino/Grasshopper/Windows are you using?

Comment by Lauren Campbell on October 13, 2011 at 1:01pm: I've downloaded Ghowl several times along with the open office and the other thing it says you must have and still can not figure out how to get the components in GH

Any help would be fantastic

Comment by Luis Fraguada on October 5, 2011 at 2:18am: Elise, very cool! Can you let us know a bit more about this? Was it as simple as 'plug and play' or did you run into issues along the way? I wonder how this would operate with multiple users, 10, 100, 1000, etc! How does the architecture negotiate that information?

Comment by Matas Ubarevicius on October 4, 2011 at 12:34pm: Great work Elise. At the moment I'm writing theory thesis on exactly this kind of interaction ;) That is a ground breaking thing...

Comment by EliseElsacker on October 4, 2011 at 11:11am: Imagine an architecture that reacts on affective, expressive or cognitive signals via Brain Computer Interface Technology