Kangaroo Hinge goal for accordion folding surface

[Cecilia_Martello]

Hi everyone,

I’m working on an origami-style tensile structure in Grasshopper using Kangaroo 2.

The idea is a set of vertical panels connected along vertical fold lines, that can open and close like a paper concertina (accordion fold). The panels should compress and expand horizontally, folding toward one side only, not toward the center.

I’ve managed to extract the mountain and valley fold curves, but I’m struggling to understand how to correctly set up the Hinge component. Specifically, I’m not sure what to feed into the Tip1 and Tip2 inputs and more generally, whether my overall setup is correct.

I’m attaching some screenshots and the Grasshopper file. Any help would be greatly appreciated,

thanks!

01_Tensostruttura ventaglio.gh (52.0 KB)

[maje90 (Riccardo Majewski)]

Use “Hinge points” component to easily retrieve the 4 points of each hinge.
It extract 4 points for each internal mesh edge.

This works better with triangulated meshes…

[DanielPiker]

Hi @Cecilia_Martello
Hinge is used together with the HingePoints component on triangulated meshes.
However, from the look of it your structure involves just parallel straight hinges and would be better modelled more simply purely geometrically without simulating using Kangaroo.

Here’s an example of something similar that could be adapted

Scissor Structure

In that case keep it simple - no need for simulation simplescissor.gh (7.7 KB) [image]

[Cecilia_Martello]

Thank you so much, I’ll try to follow this approach and see if I can adapt it to my case!