Grasshopper

algorithmic modeling for Rhino


To get the background of the problem jump here and scroll up to my 1st post.:
https://www.grasshopper3d.com/group/karamba3d/forum/topics/karamba-...

(Below the last post from that discussion).

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Hi Matthew,

Thanks for such a swift response and sorry for the false alarm.
After reinstalling Karamba the examples open without a problem.

I hoped that the examples will clarify something, unfortunately you do not use Beam Resultant Forces' output as a source of optimization criteria/objective there.

I am still having problem with the fact that Beam Resultant Forces component gives a list of zeros as a 1st output till it finishes calculation. 

This is my case:
1. Karamba calculates normal forces in elements that are in the mast's traversal plane (mast sections, spreaders and wires (shrouds)).
2. Normal forces in forestays and backstays are calculated analytically elsewhere.
3. Having the normal forces in the wires, the algorithm selects the wires' diameters (having given the wires catalogue), calculates their weights and centers of gravity.
4. Objectives are: minimizing the mass and minimizing the VCG (vertical centre of gravity). They are convergent, but constraint (minimal sail area) is dealing with it.
5. The thing is that normal forces from Karamba and calculated analytically arrives at different times (Karamba need a bit more time). I tried to delay the other data (till Karamba finishes calculation) with Data Dam, Anemone's Time Buffer, Phyton/C#/VB components, but all of them caused that Octopus/Wallacei weren't working correctly. 

Any idea comes to your mind how this problem might be solved?


Thanks,
Mikołaj

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