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: 923
Latest Activity: Feb 12

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

UDP component error on WIP version on Mac 1 Reply

Hello, I…Continue

Started by Gurden Batra. Last reply by Karolína Kotnour Dec 10, 2017.

[TouchOSC] How to format the data string for sending OSC msg (to mobile device) 11 Replies

Hello! Im tyring to send a correct data string to TouchOSC on my android (kitkat).So far I have a working communication in both direction (the status signal of TouchOSC at least is showing…Continue

Tags: data, ghowl, osc

Started by Mirek. Last reply by Mirek Nov 28, 2017.

Trying to get terrain from Google Earth 5 Replies

Hello, I am really new in working with grasshopper. I am a bit familiar with its system with nodes as I am working for years with blender node system. Although, I have to spend some time to get…Continue

Tags: grasshopper, ghowl, geolocation

Started by Zab Raz. Last reply by Zab Raz Nov 22, 2017.

GH refuse to receive message from esp8266 3 Replies

hi there. I have problem with gh collecting data with UDP receiver component. The process is that gh sending out a message with UDP sender, esp8266 receive the message through a specific IP and Port.…Continue

Started by Mexy. Last reply by Mexy Oct 25, 2017.

Comment Wall

Comment

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

Comment by Ye Yuan on September 5, 2013 at 5:12am

Hi, guys. Does anyone know how to download GHowl now? Cuz the link on food4rhino cannot be downloaded. Thanks a lot!

Comment by Naphat Chongratanakul on August 16, 2013 at 4:26am

Hi all,

I have been working on CA in processing and sending coordinates to GH for network analysis. Everything is working fine until the data that I send to gHowl get too large and I receive an error message

ERROR @ UdpClient.send ioexception while sending packet.

How can I resolve it?

Comment by WillemDerks on May 18, 2013 at 9:29am

Thank you very much Djordje!

Comment by WillemDerks on May 18, 2013 at 7:24am
Alternative download location?
Hi is there a known alternative download link other than via Food4Rhino? I'm unable to register at that site as promised confirmation emails are not send.

Thanks
Comment by George L on April 17, 2013 at 5:07am

@Luis:

Hi Luis I have created a new thread with the question.

Url Link: http://www.grasshopper3d.com/group/ghowl/forum/topics/grasshopper-t...

Comment by Luis Fraguada on April 17, 2013 at 12:50am

@George,

Yes, but I still do not understand. The attraction and deformation is calculated in Grasshopper?  What are you doing in processing?

In general, you should open a new thread to deal with specific questions as the comments area is not the greates for following up on a topic.

Comment by Rodrigo Romero on April 16, 2013 at 5:43pm

Hi Luis,

i´m attaching the definition i made, i already used the OSC dispatch to collect the data, but data transmission seems to be super slow, does this have to do with the capacity of the wifi network?

the definition is a bit messy, it´s a multiple copy paste from different definitions i found

iphone%20draw.gh

Comment by George L on April 16, 2013 at 4:51pm

@Luis:

I want to send the deformed points but also an attractor point that affects the points dynamically so when attractor changes position, the points are also affected.

Comment by Luis Fraguada on April 16, 2013 at 4:45pm

@ George: Please Clarify a bit, you want to deform a torus in GH and send the deformed points to Processing?

@Rodrigo: Check out the OSC Channel and OSC Dispatch components in order to track a specific device / address.

Comment by Rodrigo Romero on April 16, 2013 at 1:55pm

Hi everyone,

Is it possible for the UDP reciever to collect two sets of data at the same time? I have my iPhone connected using OSC (MRMR) and want to use the tactile screen to draw some curves in rhino. I´ve got everything working, but since the reciever only gets one "message" at a time the curves are not smooth (it only records variations in X-axis, then some in the Y-axis and so on..) The result is a jagged line.

Is it a UDP reveiver problem or that the MRMR application can only send one message at a time? GH.jpg

 

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