Grasshopper

algorithmic modeling for Rhino

Information

Octopus

Octopus is a plug-in for applying evolutionary principles to parametric design and problem solving. It allows the search for many goals at once, producing a range of optimized trade-off solutions between the extremes of each goal.

Also see octopus.E for custom evolutionary algorithms.

 

Download the latest version on food4rhino

It is part of a range of tools developed at the University of Applied Arts Vienna, and Bollinger+Grohmann Engineers.

 

  • search for single goal + diversity of solutions
  • search for best trade offs between 2 to X goals
  • improve solutions by similarity-goals
  • choose preferred solutions during a search
  • change objectives during a search
  • solutions' 3d models for visual feedback
  • recorded history
  • save all search data within the Grasshopper document
  • save a solution as a Grasshopper State
  • export to text or text files


Octopus introduces multiple fitness values to the optimization. The best trade-offs between those objectives are searched, producing a set of possible optimum solutions that ideally reach from one extreme trade-off to the other.

Based on SPEA-2 and HypE from ETH Zürich and David Rutten's Galapagos User Interface. Developed by Robert Vierlinger in cooperation with Christoph Zimmel, karamba3d.com and Bollinger+Grohmann Engineers.

 

To install:

  • Copy the .gha and .dll file into the Grasshopper components folder 
  • Right-click the file > Properties > make sure there is no "blocked" text
  • Restart Rhino and Grasshopper

 

Some examples are provided here

New commented examples and a brief manual are provided in the download of octopus on food4rhino.

Location: Vienna
Members: 260
Latest Activity: yesterday

Discussion Forum

Reversing axes (of objectives) direction/s in the graph and other questions. 2 Replies

It appears that Octopus (by default) takes the lesser amount from the objectives as better solutions. Is there a way to reverse that?, e.g. in Galapagos it's done by selecting Maximum or Minimum,…Continue

Started by Pin. Last reply by Pin on Tuesday.

Octopus inquiry on basic settings and workings 5 Replies

Hi all, this is going to be long, but its going to be clear, so everyone understands and can use it in the future:I am in the process of assessing the trade-offs between A) heating energy intensity…Continue

Started by Iason Bournas. Last reply by Amaraa Jun 7.

HypE reduction 1 Reply

Dear all,I am testing this magical multi-objective optimization component on my own study, and little bit curious about HypE reduction. I have googled it and haven't found any meaningful references…Continue

Started by Amaraa. Last reply by Amaraa May 25.

Error in Archive Building 1 Reply

Hi Robert,I made a little test for 4 objectives with 8 genes and I tried to find 2 minimum, 2 maximum values with 0.1 version.1) Whatever I did, I can not get the maximum value of multiplication. It…Continue

Started by Berk Ekici. Last reply by Hang Chen May 19.

Comment Wall

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

Comment by Robert Vier on February 9, 2016 at 5:09

Hi Aymeric,

sorry for the inconvenience. It seems to be a problem with the HelixViewport. do you see any messages in the Rhino Command Prompt Window when running your setup and octopus?

You could also try to place the latest version of helixtoolkitwpf.dll from the helixtoolkit in the libraries folder..! HelixToolkit.Wpf.dll

And if you would not mind, please post questions like this into the discussion forum next time!

Best

Robert

Comment by Aymeric on February 9, 2016 at 4:26

Hi guys,

I've just installed Octopus 0.3.6. (Unlock the files and copy/paste in the Component folder...)

Unfortunately, I can't see the axes of the viewport neither the view cube when I open the Octopus window. The Solver seems to run  but I don't get any visualization of the fitness landscape. I have tried with another computer and everything looks fine. Does anyone of you have already experienced such a case? How could I solve this problem for computer 1?

Here attached image on computer 1 followed by image on computer 2.

Thanks for any idea!

Best regards,

Aymeric

Comment by Andy Chen on August 10, 2015 at 20:21

Hi guys,i just start to use octopus,and i want to know how it works.Where can i find the essay or articals?Thanks a lot!

Comment by Hairault on July 10, 2015 at 3:23

Hi Octopus users,

I've been using Octopus in several problems, trying to test many possibilities, and I end up with many GH files exceeding 200 Mo, which are hard to manipulate.

Is there any mean to compress/reduce gh files size ?

Is there any technique to store the data out of octopus and re-load it if needed ?

For the moment, I am deleting genetical history I don't need, and deleting outer solutions. I also reduced the population size when the big population is diverse enough, of course trying to maintain diversity. But I don't think I will get a good set of solutions in the end.

Thanks for any clue, any help, any direction toward which I should seek !

Gaëtan

Comment by Robert Vier on June 6, 2015 at 5:31

A WIP-version of the looping component used in octopus.E is now available as an explicit loop, with the same functions as Anemone, a bit less well to use but much faster [up to 1000 times due to internal calculation]:

http://www.food4rhino.com/project/octopusloop

Comment by Israa El-Maghraby on April 15, 2015 at 1:16

Hello Robert Vier, hope you are doing great 

I have a little serious problem, my optimization collapsed at the11th generation, where it should continue till 15 generation. The octopus saved my last 10 generations "no problem about that" but corrupted my 11th, any way I can start from generation 10 and re continue my optimization process , THANKS IN A MILLION

Comment by Israa El-Maghraby on March 1, 2015 at 12:09

I have another conern my simulation does not go far than ZERO generations .. Despite i made it 3 and population size 4 .. just as a test ... Could you think what might be the problem !

Comment by Israa El-Maghraby on February 28, 2015 at 13:01

I have a question concerning EVALPOOLSIZE ... what does determine its values.. i made population size 4 and max number of generation is 3 ... does the values of these parameters affect it !.. I really don't understand it clearly 

Thanks in advance

Comment by Israa El-Maghraby on January 28, 2015 at 13:33

Ok (Y) , Thanks a lot :) 

Comment by Robert Vier on January 28, 2015 at 13:27

Israa,

you are in generation 0. The graphs will be shown in the next ones.

Best

 

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