Screentendo is a clever desktop application that allows you to select any portion of your Mac desktop screen and automagically turn it into a playable level of Super Mario Bros.
The app works, explains creator Aaron Randall, by launching a semi-transparent, resizable window on your screen. Once you place the Screentendo window over an area and click inside the window, it will cause the app to render a game level based on what's within the window.
Randall walks through the process the program, which was created using Cocoa and Sprite Kit, uses to do this, in great detail on his blog. In a nutshell, the app creates a screenshot, runs it through a bunch of filters to find a strong outline to build a level around and then passes it to a...
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