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: 976
Latest Activity: Feb 5

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

Android OSCmessage to GHowl. Error Message. 7 Replies

Hello all,I am writing an android interface to communicate with grasshopper. It's the same idea as some of the OSC apps in the app store, but they aren't open source and I need to be able to have…Continue

Tags: java, osc, udp, ghowl, android

Started by Jon Blout. Last reply by Konstantin Markin Aug 8, 2022.

Ghowl xml import /export 10 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 Hannah Stevens Apr 14, 2021.

external real time data/ parse xml 5 Replies

hello, i am trying this for the first time and hoping someone can point me in the right direction. i am trying to use grasshopper + ghowl to read real time data from a weather site's API. i have a…Continue

Started by pwdarden. Last reply by Denis Cox Oct 26, 2020.

problem about UDP receiver

Hi, I am using UDP receiver in gHowl. It works well until I packaged everything into a cluster, and the UDP receiver keeps sayting "AddressAlreadyInUse: you might have opened this socket on another…Continue

Started by vapeur Jul 5, 2020.

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Comment Wall

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Comment by Matas Ubarevicius on September 17, 2011 at 5:01am: You're welcome ;)

Comment by Luis Fraguada on September 17, 2011 at 4:50am: Matas, thanks for sharing!

Comment by Matas Ubarevicius on September 14, 2011 at 11:50am: I've made new tutorial where OpenFrameworks is joined with Grasshopper through gHowl in a loop to render simulations. This is full OSC connection with integrated send/receive functions, so it could be used as a reference for different kinds of projects.

http://fucture.org

Comment by Luis Fraguada on September 5, 2011 at 4:03pm: Hello Maciek,

All you need to know is a point in the location near to where you want to search. You will want this in Decimal Degrees. I suggest Google Earth as it easily allows you to format the coordinates to this in the options. Check out the GetTerrain example in the GEO folder to see what I am talking about.

Comment by Rémy Maurcot on September 5, 2011 at 12:16pm: Good works

Comment by Aaron M. Ryan on August 25, 2011 at 9:37am: thanks Luis...found that...working now.

Many Thanks for your hard work.

aaron

Comment by Luis Fraguada on August 24, 2011 at 8:22am: @Aaron: take a look at the example: gHowl_UDP_Send+Receive_agents

@Timothy: We have reworked the spreadsheet components to be more robust. Look for an update soon...actually, would you be willing to test out the changes we have made? If so, send me a message with your email.

Comment by Timothy Myles on August 16, 2011 at 10:15pm: gHowl doesnt seem to be able to export to xl or open office spreadsheet. It does import. Anyone else have the same problem. I am Rhino 4 SR9 latest GH and gHowl.

Comment by Aaron M. Ryan on August 6, 2011 at 8:21pm: Getting information from Processing to GH with GHowl is no sweat, thanks to your hard work..but is there a way to get information passing in the opposite direction...I can't seem to get the receive(); function that is implemented in the udp library to actually get any data from GH...any help would be awesome.

aaron

Comment by Matas Ubarevicius on August 3, 2011 at 7:37am: Hello everyone, new free tutorial on processing/grasshopper integration through gHowl

http://fucture.org

Intro

http://www.youtube.com/watch?v=1rnkPO8Jcx4