[color=#999999][color=#999999][color=#999999]This activity belongs to the [i]GeoGebra book[/i] [url=https://www.geogebra.org/m/dm9prd7h]Attractive projects.[/url][/color][/color][br][br][/color][b]3D project[/b]: [i]model a dynamic object.[/i][br][br][table][tr][td][img]https://www.geogebra.org/resource/tu5xbxqt/vkrsYapfzZ5tu9gB/material-tu5xbxqt.png[/img][/td][td]In this example, the typical traditional American barbershops pole is modeled. A spinning barber pole creates a optical illusion, in which the stripes appear to be traveling up or down the length of the pole, rather than around it.[/td][/tr][/table]

[color=#999999]Author of the construction of GeoGebra: [color=#999999][url=https://www.geogebra.org/u/rafael]Rafael Losada[/url][/color][/color]