Grasshopper

algorithmic modeling for Rhino

Information

gHowl

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: 771
Latest Activity: Dec 15

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

IMPORTING MY PLACES FROM GOOGLE EARTH TO GRASSHOPPER 12 Replies

CAN WE IMPORT MY PLACES MARKED IN GOOGLE TO GRASSHOPPER SOMEHOW USING GHOWL??Continue

Tags: PLACES, MYPLACES, BOOKMARKS, IMPORT, EARTH

Started by Khizer Ishtiaq. Last reply by Kevin Vong Dec 15.

Physical sliders 44 Replies

Hello everyone,I'm new to grasshopper and I'm trying to hook up a midi controler in order to be able to control some sliders.I've seen some posts about this topic but due to my lack of programming…Continue

Started by Camilo Cruz. Last reply by Kuba Dec 8.

Buffer Limit 4 Replies

LuisI am having the below issue:"1. Solution exception:A message sent on a datagram socket was larger than the internal message buffer or some other network limit, or the buffer used to receive a…Continue

Started by Steve Lewis. Last reply by Steve Lewis Jul 29.

Kangaroo-gHowl (Processing) - Error

Hello,I’m working on an algorithm in Kangaroo, in order to see physical transformations and I have connected this with Processing via gHowl in order to send and receive data.In order to run the…Continue

Tags: gHowl, Processing, Kangaroo

Started by Ifigenia Lambrou Jul 28.

Comment Wall

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You need to be a member of gHowl to add comments!

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
Comment by Luis Fraguada on September 30, 2011 at 10:51am

Two posts by P&A Lab showing Processing connections to Grasshopper via gHowl:

Swarm Cell

Swarmy

Comment by Mirco Bianchini on September 23, 2011 at 11:08am

Loop without script with gHowl

http://vimeo.com/29489108

 

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