"We've layered on detailed forecasts out to seven days," explains developer Adam Grossman, "and created a 'time machine' that lets you explore weather data going back decades (and we use it to extrapolate months or years into the future). We've created a map that shows you how local and global weather patterns will change over the the upcoming week, with a beautiful, smooth animation."
It was implemented in HTML5 for a true cross-platform experience, and Grossman says the team went to great lengths to make the mobile experience indistinguishable from a native app. "We [took] the controversial step of requiring iPhone users to save it to their homescreen [...] we really want people to think of it not as a web app, but an app you install from the web."
Grossman describes getting precipitation maps (a 500x500 canvas on the desktop version and full screen on phones) to work properly.
"We learned a lot about how to structure code to take advantage of just-in-time compilation and other optimisation shenanigans the browser engages in, and this improved performance tremendously. We’re now at 60 fps on the desktop, and 40+ fps on the iPhone 5. And that's for a full screen canvas element that rewrites every single pixel each frame!"
This showcase was originally published in .net magazine issue 242.
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