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: 748
Latest Activity: on Monday

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

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.

UDP receiver problems. MAX MSP 10 Replies

I am trying to receive UDP messages in Grasshopper from MAX MSP, and I've run into some issues.  I think that the two programs are talking to each other because the UDP reciever in GHowl runs fine…Continue

Tags: MaxMSP, UDP, ghowl

Started by Katherine Treppendahl. Last reply by Luis Fraguada Jul 26.

Does Google Maps share 3D building data? 2 Replies

I was wondering whether there is a way to access the 3D buildings layer that Google Earth offers for some major cities (like Amsterdam)?…Continue

Started by Mathias Gmachl. Last reply by Mathias Gmachl May 29.

Comment Wall

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

Comment by horst Becker on April 30, 2014 at 4:09am

Hi Luis,

I try to export a XML file by using the gHowl XML write component. but I run into some problems. The attached image shows an imported xlm file with the data structure I want to reach. my problem is now that the Import component gives me more Outputs then the write component has inputs.

the import component outputs are: 1. elements, 2.attribute names, 3. Attribute values

write component Inputs: 1. Data, 2. Element Names

 

How does that come together?

 

Any hint? Thanks...!

Comment by Javier Armando Figueroa Escobar on January 22, 2014 at 1:57pm

Hi Luis, thanks for sharing such great tool. I've got an issue with sending data from processing through osc. Its a huge string that its sopouse to be sent in real time and i'm already been successful in sending the data, but there is a maximum size of the amount that it been send, after that it simply stop. I could now configure the datagram size of the message in processing, but nothing change, so there is a way of edit the size of the data that i can receive in ghowl?
Only i've noticed that depend on the quality of wireless network,
Thanks a lot

Comment by davide ventura on October 25, 2013 at 8:19am

Thanks Luis, I have already my xively account..now I'm looking for a app for my samsung galaxy ace..is a quite old, if you some apps to suggest me..let me Know..muchas gracias!!

Comment by Luis Fraguada on October 25, 2013 at 5:33am

p.s. you could simulate some data on your own if you have a smartphone of some sort with GPS.  There are many free apps which allow you to track the sensors on the phone as well as the GPS location.  If you get one of those apps, I can help you to modify the example to work with the data that you capture.

Comment by Luis Fraguada on October 25, 2013 at 5:31am

Ah. I see what you mean.  This data was indeed directly captured by the ASKit.  Pachube became Cosm, and now it's called Xively.

I have not tried, but I believe the pachube component still works (need to check that).  It should allow you to get data from that service.  Otherwise, you could use the XML Parse component to read data in from the Xively service.  You will probably need a Xively API key.

The ASKit eventually became the Smart Citizen.  It is actually quite different than the ASKit in terms of how good the hardware is.  I did not work on the Smart Citizen project, but the people that did are great engineers and have made an amazing platform.  Also the web platform is fantastic.  The idea here is not just to collect data, but to create a community of people that are also interested in this.  The Smart Citizen kit is meant to be in a static location, where the ASKit was a mobile kit with GPS.

Comment by davide ventura on October 24, 2013 at 8:34am

hi Luis, I'm referring to the "ImportData" example: in that case you used CPH_data. My question is exist something like a web platform were I can download other data in .csv extension like your CPH_data? For exemple something like pachube where people load own data for exemple monitoring own house etc..I try only to taste this tools, that's all!!   And for I have another question:  did you develop an affordable version of "Askit"?

Comment by Luis Fraguada on October 24, 2013 at 7:26am

Which example are you referring to?  In the gHowl example files, there should be all of the data you need to run the examples...

Comment by davide ventura on October 24, 2013 at 4:05am

Hi martins thanks for your answer. The problem is that I don't have my data because I'dont have any device to monitor and to store data. I'm planning to do do just an exercise downloading data already memorized from other persons in other context. 

Comment by Martin Siegrist on October 24, 2013 at 3:38am

Davide, simply create your own csv file by exporting some data out of excel. Working with csv you'll need the Split Text component in Sets / Text. 

Comment by davide ventura on October 24, 2013 at 3:19am

I'm referring for instance at the Luis's example "Import data", so there are some web site where we can directly download climatic data updated every day (for instance)..I hope to formulate a clear question!

 

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