Hello everyone, I used attraction force to make minimal paths that pass though 3 buildings on the ground level. But I failed to combine with repulsion force to make the paths detour from the elevators and staircases in the cores of the buildings. Can somebody help me have a look at the codes to see…

Here are some examples with more up to date version of the attraction/repulsion [image] Magnetic attraction/repulsion Kangaroo Here’s a version with some of the improvements mentioned above polarity.gh (12.7 KB) The patterns that can emerge can vary a lot fr…

Thank you for your scripts David :slight_smile: I understood this script less than the old one. I tried to connect the positive points to the points I want attractive force, and connect the negative points to the points I want repulsive force, but it didn’t work. How do I convert the points into min…

Hi @ka.man.lee Here’s an updated example specifically for the Frei Otto wet threads type form-finding. woolthreads_k2.gh (13.8 KB)

As for including obstacles which the paths have to go around- One simple way could be to keep the threads on a surface with holes cut out for the obstacles: woolthreads_obstacles.gh (16.6 KB)

Hi @DanielPiker I’m quite new to Kangaroo so apologies if my question has quite an obvious answer or is in the wrong place. I saw your C# script outputs the following string “Script_Instance+RangedAttraction” how does the solver use this string to extract all the relevant information for the goal? …

Hi @david.prior-hope17 The script is not outputting a string, but an object. In this case the object is an instance of the ‘RangedAttraction’ class which is defined in the script (and inherits from the GoalObject class defined in KangarooSolver.dll). When you hover over the output or connect a tex…

Very cool! Thanks so much for the prompt response, all makes sense!

Hi @DanielPiker Thank you for the script! I’m now also working on a little project with it. I’m new to C# so apologies if the answer to my question was obvious. I want to figure out what the inputs of the C# script means, but I can’t figure out What the “cutoff” stands for. Does it has geometric …

Cutoff here is a way of preventing infinite forces when points are very close together. The force in this example has its magnitude varying as an inverse power of distance. This means that as the distance between 2 points approaches zero, the force becomes infinite. To avoid numerical issues with …

Thank you so much Daniel! That was really clear and helpful!

Kangaroo attraction and repulsion forces

Grasshopper Kangaroo

DanielPiker (Daniel Piker) June 17, 2021, 9:06pm 2

Here are some examples with more up to date version of the attraction/repulsion

Create 2D Smooth Surface from lines

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Kangaroo attraction and repulsion forces

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