User Designer

What would happen if your toothbrush could mate with another toothbrush?

Would you end up with an even better toothbrush - the best of both toothbrushes? How about if your toothbrush mates with 5, 10 or 15 different toothbrushes, with each new toothbrush in turn mating with another new toothbrush?

If you could decide which toothbrushes get to breed would you eventually end up with a toothbrush that’s perfect for you? Its form and function, its colour, feel and shape all bred into the toothbrush children generation by generation. The toothbrushes you dislike don’t breed so don’t pass on their “Form & Function DNA” to the next generation.

How would you tell a toothbrush to mate? Maybe to start the mating process you exchange design DNA by physically rubbing your toothbrush against another toothbrush. After that your smart malleable material toothbrush turns into a lump, which then self-forms into lots of little baby toothbrushes. To decide which mini-toothbrushes breed you crush the ones you don’t like, and rub the ones you do like off each other. Then repeat again and again, till eventually you have a baby toothbrush that you stretch into full size and begin using as your day-to-day toothbrush.

The method I’ve described for breeding toothbrushes is a Genetic Algorithm (GA) search. GAs are very powerful for exploring a large search space. In this case our search space is the potential designs for toothbrushes. Seeing each design generation could be a great way of helping people explore and imagine design possibilities.

Dryad, from Standford Virtual Worlds Group, is a related example of software for exploring the design space around 3D trees. You can cross breed different kinds of 3D trees. Dryad is freely available for Windows and Macs, go play.

It’s easy enough to speculate about reshaping toothbrushes by cross breeding them, but what about more complex artifacts. Such as doors that slide or TV remote controls. How would you control the cross breeding of what a button does? Functionality is more abstract than form. For example if you cross breed two door handles where one door handle works by turning and the other by pulling…you could end up with a nightmare child door handle that works by turning, then pulling, then turning again.

How can the person doing the cross breeding place limits on what forms and functionality are explored? Maybe by only cross breeding one specific part of an artifact at a time, e.g. only cross breed the handles on the toothbrushes.

For artifact cross breeding to be possible objects and artifacts will need some kind of DNA. At the most abstract level the DNA would encode form, functionality and the relationship between both. Or putting it another way: malleable objects and artifacts need to be self-describing.

Smart Lego (New Scientist article), from CMU’s Computational Design Lab, is an example of a physical / virtual artifact that is able to self-describe. Also for many years various computer languages have been capable of different amounts of self-describing, which in computer science is called Reflection.

Of course now I’m wondering what would happen if you cross breed a door handle with a toothbrush?