The Algorithms Behind <em>Moana</em>’s Gorgeously Animated Ocean
In the early days, when motion pictures were still new, filming the ocean was a radical idea.
A surface-level shot of the waves was certainly feasible, but capturing footage of swaying undersea fauna, swimming fish, and marbled sunlight dancing on the seafloor? The consensus was: It couldn’t be done.
In fact, it could be. A century ago, the brothers John Ernest and George Williamson, the sons of a sea captain and inventor, would prove it. To do so, the Williamsons turned to a piece of technology their father had designed for divers in undersea repair and salvage jobs. The device was a series of flexible concentric tubes, “interlocking iron rings that stretched like an accordion,” as the Library of Congress puts it, made to suspend from a specially outfitted ship so that a diver could descend into a watertight chamber below. At one end of the tube was the boat on the surface of the water; at the other, the submersible room.
