(As reported earlier in

this previous post)

Daniel Piker is developing ways to accurately simulate physical behavior in his Grasshopper component "

Kangaroo".

In the latest release there are tools for simulating bending geometry.

*This is nothing but a revolution for this investigation!*

Never before have I been able to recreate bending geometry so accurately in an "artificial way". At the moment Kangaroo works very accurately for 2d-bending with both fixed and hinged ends and also in 3d for rods.

3d-bending of developable surfaces is a little more tricky and requires a careful setup to make sure the surfaces stay developable.

Kangaroo works in an iterative way by letting some predefined forces (like springs, bending resistance, pressure and gravity) affect the geometry, step by step, until (usually) a stable solution is reached. The beautiful thing is that all this is done in real-time, so you can play around with different constraints and setting and see the result instantly.

Of course, this investigation is not only about mimicking bending geometry, but also about understanding it. Kangaroo brings my understanding to a new level!

For more reading on how Kangaroo deals with bending, Daniel Piker has recommended a paper written in 1998 by *S.M.L. Adriaenssens* and *M.R. Barnes* called *Tensegrity spline beam and grid shell structures,* published in *Engineering Structures* 23 (2001), pages 29–36.

Many thanks to Daniel Piker for making and sharing the Kangaroo!