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 Constantinos Miltiadis on December 7, 2012 at 10:47am: Luis thank you for you comment, even more for releasing gHowl and making such things possible :)

you can check out a booklet with more architectural stuff - details etc at my GH page or my blog

http://at-nowhere.tumblr.com/

Comment by Luis Fraguada on December 7, 2012 at 4:26am: Pantelis, great video. Thanks for sharing!

Comment by Constantinos Miltiadis on December 7, 2012 at 3:06am: hello people, hello Luis, this is my thesis project that is about kinetic and interactive structures. gHowl helped my bridge data between processing and rhino, to create the geometry

wwatch in HD for better quality

Comment by Mostafa R. A. Khalifa on October 15, 2012 at 11:42am: I have proplem on reading ecxel file into Grasshoper.

the reader component shows me the formula created in the excel file for each cell, but not the final result of the formula as a number. for example it reads ( 1, A1+1, A2 + 1...,etc) not reads ( 1, 2, 3..etc)...

can anyone give me a solution please..,(^_^)

Comment by Damien Alomar on October 10, 2012 at 6:18am: Phillip,

IIRC, the XML parser component was designed to work in 3 ways; with a file path, with a url, and with a raw XML string. Have you tried directly inputting the XML string to component? If so is there any error message that get?

Comment by Philipp on October 10, 2012 at 12:57am: it will be nice to have the possibility to parse xml just from panel, either. Now I a m sending a curl to api, getting a xml as a string, stream it to the file and read back to grass with your splendid component...

Comment by Maxwell Sheffield on October 1, 2012 at 5:10pm: It seems to be the most easy step, but the excel sheet reader keeps saying "file contains corrupted data" even though it is only very little and basic data. some text and some numbers, nothing else. i tried to save it from open office in all different file extensions, (even the default grasshopper tool gets the data (unfortunately it cannot interpret xls properly..)) i just do not know what i am doing wrong. any ideas? thank you

Comment by Thibault Schwartz on September 14, 2012 at 6:39pm: Well, seems to work fine with GH 0.9.10... sorry for the trouble.

Comment by Thibault Schwartz on September 14, 2012 at 2:14pm: Hello Luis,

I have a bug with the OSC listener:

When I close a definition (using GrasshopperUnloadPlugin) with an osc listener that has recieved some data, it kills rhino. I tried with an empty definition with only a network scanner and a listener to be sure that it comes from it.

Comment by Luis Fraguada on August 15, 2012 at 12:46pm: Adam, I see. Dragging and dropping into the GH canvas should drop the GHA into your special components folder.