Grasshopper

algorithmic modeling for Rhino

AnchorSpring: Constrain an anchorspring-point to a certain range

hello to everyone.

I will find really useful to be able to constrain an anchorspring-point in a certain range from the original one during a simulation.

Rightnow I can use "Sticky" in AnchorSpring to make react this component only after having exceeded the Sticky value with the force working on it.

On the other hand i cannot constrain the achorspring-point in a certain range (distance from the original one). It could be great to do!

Is there a way to do that in a kangaroo simulation?

Are you (Daniel) planning to add something like that to kangaroo forces or anchorspring component?

Views: 633

Replies to This Discussion

Hello Davide,

This can be achieved using the LowerCutoff setting of the spring component.

As shown in the attached example - you can make one (regular) Anchor point, and attach it with a spring to the point you want to constrain to remain near it. Then setting both the LowerCutoff and RestLength of this spring to the range you want to allow.

When the point is below this distance from your anchor it will not be affected, but if it tries to move beyond that range it gets pulled back.

Attachments:

Hmm

A "similar" puzzle is the following:

Assume that you design something like this:

where actually the regular and/or inverted cones are suspended/pulled via a modified version of that (I.E. with some cardano linkage between the axial strut and the anchor cables):

In plain English : a lot of geometry (quite probably imported objects from some MCAD app) that should remain dimensionally "intact" whilst it's allowed to "bounce" until equilibrium is achieved. 

I'll prepare a suitable simple(??) test case soon

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