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An Algorithm That Makes a Tower EVOLVE, Live

A live evolutionary algorithm: Galapagos changes the shape of a tower, Ladybug measures the solar radiation, and generation after generation the tower searches for its form.

Paulo Giavoni

Paulo Giavoni

Engineer & BIM Specialist

27 August 20262 min read

A population of shapes#

A population of shapes: the sun measures them, the best survive
A population of shapes: the sun measures them, the best survive
An evolutionary algorithm works like natural selection, only faster. You start with a population of shapes, all different. Each one is judged by a criterion, here the sun: how much radiation the tower receives. The best ones survive, combine and produce the next generation. After a few dozen generations, the shape that remains wasn’t drawn by anyone: the computation found it.

Who does what#

Rhino, Grasshopper, Ladybug and Galapagos: every point on the chart is a shape that was tested
Rhino, Grasshopper, Ladybug and Galapagos: every point on the chart is a shape that was tested
  • Rhino and Grasshopper hold the tower’s geometry and the parameters that deform it.
  • Ladybug measures the solar radiation on each variant, using the site’s climate data.
  • Galapagos is the evolutionary engine: it tries, judges, crosses over, tries again.

On the scrolling chart, every point is a shape that was tested; the curve climbs as the tower searches for its form.

This isn’t Revit#

There’s no BIM model here: what you see is the computation. But the idea is the same one behind every optimization, from façades to MEP routing: you describe the shape with parameters, define what you want to maximize, and let an algorithm explore what you’d never have time to try by hand.

Watch the video#

One minute, vertical: the tower changing shape live, the sun judging it, the chart climbing. The video is in Italian.

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Questions or comments?

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