kangaroo settings

hi
all, could somebody help me whit kangaroo settings

i have
this structure made of interactive connected beams,
wat i
want is to preserve the connectivity and structure of this beams( the lines
have to stay straight) after moving the top points, the problem is i didn´t
find the right settings for it( i hope thats possible),
the
best what i get was straight lines in top-wiew but in perspective or site-wiew
was the lines whit kinks( the lines have to be straight in all dimensions).have somebody
any idea for the settings or other way to reach that ?

Thanks a lot for a help

kangaroo settings?

i have this structure made of interactive connected beams, wat i want is to preserve the connectivity and structure of this beams( the lines have to stay
straight) after moving the top points, the problem is i didn´t find the right
settings for it( i hope thats possible), the best what i get was straight lines
in top-wiew but in perspective or site-wiew was the lines whit kinks( the lines
have to be straight in all dimensions). have somebody any idea for the settings
or other way to reach it ?

Tags: kangaroo

Attachments:

beams.ghx, 1.1 MB
move.JPG, 96 KB
after.JPG, 102 KB

Replies to This Discussion

Permalink Reply by Jon Mirtschin on April 26, 2011 at 9:56pm

Not the result your after, but possibly of interest to you anyway.

I've recently been enabling the Oasys GSA force density form finding solver to be utilized from Grasshopper, so I thought I'd post it's results for your model. I haven't tested, but I've got a feeling your problem might be over constrained to keep all members straight. Will see what others say.
I hope to enable this for other analysis programs shortly.
Cheers,
Jon

Attachments:

beams force density.gh, 196 KB

Permalink Reply by Mi*Ma on April 27, 2011 at 7:12am

hi jon,

i have some problems whit ssi, if i open your file or try use the component ssiFF(form finding), get the component red and i can´t use it,

do i need grasshoper 8.0010 (now use 8.0009) or some others ssi tools, now structdraw and ssigsa,

and you have right, the problem is to keep all members connected and straight.

i need something what force the lines to be straight and the points stay on lines,

something like umbrella-principle,

the final lenght of lines and position of the points on the line it´s not too immportant( of course it´s important, but i want to keep the deformation small so that position of the points on the line should not change dramatically)

but anyway thanks a lot to your help.

cheers mike

Permalink Reply by Jon Mirtschin on April 28, 2011 at 2:45am

Hi Mike,

As you've noticed, you need additional software and licenses to access my definition, you need Oasys GSA (which should be free to students if you're university has an academic license) and you need to install my plugins from http://www.geometrygym.com/downloads (and run the rhino command sdrZZLicenseRequest). GH0.8.0009 should be fine.

I haven't had time to think about keeping the members straight, but I'll give it some thought and keep an eye here if someone else advises on a way to do so.

Cheers,

Jon

Permalink Reply by mirre.veerman on April 12, 2012 at 5:17pm

Hi Jon,

I have also some troubles running the ssiFF(form finding) component. I do have the proper licence for the gsa plug in, also a full educational licence for GSA. But if I try to use the component, there is given an error in the commandline it says someting about COM-classfactory for the component with CLSID {8A313280-31DA-4296-8A91-49ABF783E962} failed due to the following error: 80040154.

I´m not sure what I´m doing wrong. Can you help my solving this problem=

Permalink Reply by Daniel Piker on April 28, 2011 at 3:12am

Can you clarify the result you are after ?
Do you want the connections to slide along the rods?
Or is the whole thing supposed to form a pin-jointed mechanism ?

You can decrease the amount the rods bend by increasing the bending stiffness (if it becomes very high, you will need to reduce the timestep accordingly to keep it stable), though as Jon says, it looks like it might then not have any freedom to move at all.

If it is a question of sliding constraints, then I think this can be added without too much trouble

Permalink Reply by Mi*Ma on April 28, 2011 at 4:06am

the result i´m after schould be the same system as on start, connected straight lines and the connections have to slide along the rods, that means that the distance between the conections could to diversify and the lenght of the lines also= the connections are always point at line and the line is always straight

the end result schould be 2 or more this structures connected on the upper end points to something like a roof = 2 of this structures have to meet at 2 pointshere is a pics what i want

thanks for your help

mike

Permalink Reply by Mi*Ma on April 29, 2011 at 10:08am

hi daniel,

do you have some idea or tip for me, i have really no more ideas how to get it.

Permalink Reply by eduardo matamala on September 3, 2012 at 5:40pm

hello,
I hope you can help me, I'm fond of lately I'm using rhino and grasshopper, for my academic study at my university I'm trying to develop something similar to what you did it in this picture, I would like to develop the definition in order to build something similiar to what your samples, it would be possible to help me with the definition???
greetings and thanks.

Permalink Reply by Mi*Ma on September 4, 2012 at 2:16pm

hi, of course i could try.

what exactly you want to do?

the basic structure was (in my case) made whit some basic functions of Grasshopper in connection with galapagos, but give me some info what is exactly your plan.

Permalink Reply by eduardo matamala on September 4, 2012 at 2:32pm

thanks,
I want to do is a wooden deck for a community plaza using reciprocal frames in building freestanding structure (http://www.grasshopper3d.com/forum/topics/reciprocal-systems) but over time I realized to achieve and to build ladefinicion take me a long time to develop it and since I have the experience and expertise discarding.
watching a structural system, I accommodates more my reality, and could definition based on a kangaroo adapted to achieve using such definition and using a CNC able to manufacture the elements assembled structure.
I also like what your structure is that apparently is armed with grasshopper so basic that way I can understand it in a better way so I could explain it better before my academics.
if you could help me with your definition would be great.

Attachments:

IMG_0503.JPG, 983 KB
IMG_0510.JPG, 874 KB

Permalink Reply by Daniel Piker on September 4, 2012 at 6:12pm

Hi Eduardo,

Have a look at my reply here:

http://www.grasshopper3d.com/xn/detail/2985220:Comment:648007

I posted some definitions there for reciprocal grid relaxation that I think you might find helpful.

Permalink Reply by eduardo matamala on September 4, 2012 at 6:31pm

Hi Daniel,
Indeed, I have fully reviewed your post and it has served me too for my study and achieve the definition, but really your definition while working and make reciprocal mesh, what I'm looking for is to create a freestanding deck and arrivals on the ground are of similar geometry to a tree, similar to the definition of Ma Mi. That's why I'm trying to implement to achieve your definition of reciprocal mesh this geometry.
Greetings and thanks for the attention.