A piece of milled plexiglass acting as a projecting lens; via the Computer Graphics and Geometry Lab at the École Polytechnique Fédérale de Lausanne
New milling techniques applied to glass and plexiglass panels could be used to “create windows that are also cryptic projectors, summoning ghostly images from sunlight.”
[Pauly and Bompas] hope that the technique will be used in architectural design, to create windows that mould sunlight and throw images or patterns onto walls or floors,” which, if timed, milled, and manipulated just right, could produce a slowly animated sequence of images being projected by an otherwise empty window during different times of day.
To control the shape of a caustic pattern generated by a specular or refractive surface, we need to solve the inverse problem: how can we change the surface geometry, such that incident light is redirected to produce a desired caustic image?
One summer morning, the beginning of July, I got this long letter from my girlfriend, and in it she’d written that she wanted to break up with me. I’ve always felt close to you, and I still like you even now, and I’m sure that from here on I’ll continue to…et cetera, et cetera. In short, she was wanting to break it off. She had found herself a new boyfriend.
I hung my head and smoked six cigarettes, went outside and drank a can of beer, came back in and smoked another cigarette. Then I took three HB pencils I had on my desk and snapped them in half. It wasn’t that I was angry, really. I just didn’t know what to do. In the end, I merely changed clothes and headed off to work. And for a while there, everyone within shouting distance was commenting on my suddenly “outgoing disposition”. What is it about life?