Grasshopper

algorithmic modeling for Rhino

Collision along curve

 

Hello every one,

 

I was trying to create a retractable cable structure like below.

As you can see, there are some nodes which can move along the cable.

The idea was, that the node Nr.0 will pull back (to lift or right) when the winch active by using kangaroo ‘vortex’ or ’gear’.

 

When node Nr. 0 start moves along the cable it would hit the node Nr. 1, 2 and so on…

All the nodes are also connected (with a wire in red) in order to keep their position/ distance.

 

I have tried some nice kangaroo’s components, such as ‘sphereCollide’, ‘CollideSurf’ or ‘BoxCollide’…

I have many problem by use ‘spherecollide’ and ‘boxcollide’ coz I couldn’t control the movement along a curve.

By CollideSurf, even I could push some points onto breps to make the collision happen, but the breps muss stay there even strong collision…

 

I saw a very interesting video from daniel piker:

http://www.grasshopper3d.com/video/thin-elastic-shell-deformation-i...

(Especially the elephant part…it’s funny, awesome!!!)

 

I was wondering, how we can deal with rigid element like this chair or elephant-hit. Imaging how domino works!

 

Has anyone advise or keywords for this retractable-task?

Views: 1047

Replies to This Discussion

Permalink Reply by Daniel Piker on April 28, 2014 at 12:01pm

Hi Frank, is this something like what you are after?:

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Permalink Reply by Jon on April 29, 2014 at 1:49am

Wow! terrific daniel!

let me play it for a while then will give u feedback soon ;-)

Permalink Reply by Jon on April 30, 2014 at 3:48am

Hi Daniel,

 

to make the 'locomotive driving himself' I applied a uforce in x, and also create a switch(close/open) in control room(GH canvas).

My understanding that a constant-speed isn’t real. Normally a engine accelerate the speed by time.

I make a definition, and trying to increase the speed by distance/time like below.

My intention is to accelerate it from 0 to 3, until the whole system found the equilibrium. The problem is how can I make it time history?

I have checked many discussions about kangaroo sequence, but still confused me...

Do you have any advice?

 

 

 

 

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