How to use GH as a generator? (.gh is called by an console application(c#) )

Hello,everybody!

Thank you for coming to help me.

I want to use GH as a generator. All my process is following:

(a loop)

GH generates geometric information--->analysis software analyzes---->the optimization results in A.txt----->GH take the parameters in A.txt--->GH generates geometric information again.

The only step, which I still cannot pass, is the final one. I have a look at the SDK note, but I find the content in that is mainly about how to making a component.

The following fig is .bat to run Rhino ,call grasshopper and open .gh file. What I want to achieve is creating a loop(open .gh--> close .gh), so that I could generate geometric information once and once again.

I am a fresh in GH. If u know how to do, please tell me. I would be very grateful.

Replies to This Discussion

Permalink Reply by Lucas Lai on February 28, 2017 at 7:58pm

could this be achieved by GHA?

Permalink Reply by Lucas Lai on March 2, 2017 at 6:24am

Hi,does anyone have some advice? ^_^

Permalink Reply by David Rutten on March 2, 2017 at 8:10am

It can be achieved I'm sure, although shutting down and restarting GH between every two iterations seems pretty wasteful. You cannot control GH remotely, you'd need either a GHA plugin that you can access from a console or you need to run RhinoScript files.

Galapagos sort of does what you describe already, except it might not change the inputs in ways you like. Basically it's a very naive stochastic approach. Do you have a list of slider values/other inputs that you want to iterate over ahead of time, or does the result of the evaluation steer the way geometry is generated at every step?

Permalink Reply by Lucas Lai on March 2, 2017 at 6:16pm

Hello David,

Thank u so much for your reply. For your question, I use a c# program(an independent program) to achieve a genetic algorithm for constrainted optimization. The genes would be given in the .txt by the c# program.

What I hope is that once the new genes is given in .txt, the grasshopper logic could run again. I know there might be some problems if I use panel to input parameters. But I think it would not be a big problem. In that way, I could generate new geometric information for my analysis software.

I remember there is a "Run_Grasshopper()" static method in the namespace"Grasshopper.Plugin". However, I failed to call it. It seemed not so easy like I thought.

Sincerely,

Lucas

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