8.1.31. Rection Simulator



Date published: September 8, 2023


This exercise builds up on the “Tensegrity Simulator” exercise to produce “rection” structures, which have been defined by Andry Widyowijatnoko as a synthesis of reciprocal and tensegrity structures. Rection structures rely on both the bending stress of rigid members and pre-stressed cables for their stability.


1. Use pipeline to extract all curves / points drawn on the respective layers.
2. Break the tension curves into sub-curves to simulate a chain-like behaviour
3. Apply length constraint onto the sticks with their original length
4. Apply a gravity force onto the stick-ends
5. Apply length constraint onto the cable segments with either a fraction of, or their original length to create tension
6. Apply a gravity force onto the ends of the cable segments
7. Control the paths of the input data by splitting compression from tension elements with two show components
8. Extract the processed data and pipe the compression elements

This exercise is using Grasshopper version 1.0.0007 
Widyowijatnoko, A., Irwanuddin, I. & Aditra, R.F. Rection as a Synthesis of Reciprocal and Tensegrity Structure. Nexus Netw J 21, 465–478 (2019). https://doi.org/10.1007/s00004-019-00443-6
Daniel Piker, Kangaroo Physics (by Daniel Piker), https://www.food4rhino.com/app/kangaroo-physics, Accessed August 6, 2020 




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