This week in Nature: Rolling honed – Algorithm designs 3D shapes to follow specific pathways. Browse the full issue here:
Car wheels and billiard balls follow a linear path when they roll down a flat slope. More exotically shaped solids, such as oloids, trace a sinusoid-like route.
In this week’s issue,and his colleagues take a more generalized approach to rolling objects, creating an algorithm to design a shape that will follow a predefined periodic path when rolling down a slope. They then printed these ‘trajectoids’ in 3D, as pictured on the cover, to test if they worked. The team found that the bodies followed the predicted pathways, sometimes even those that took the object intermittently uphill.
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