Designing a naturalistic computer get beach is rough oeuvre , but thanks to a new vitality technique it will shortly be possible to create far more naturalistic CGI using less computing exponent than ever .
From explosions in a desert , to the trickle of an ballock timekeeper , alive scenery carry sand are notoriously backbreaking to model . But nowRahul Narainand his team from the University of North Carolina at Chapel Hill have grow a new proficiency that should make figurer animation look more realistic .
Since sand is made up of a appeal of bantam grains , its appearance can alter greatly . “ It can look like a solid pot you may brook on , to a flowing avalanche , or even a swarm of rubble , ” says Narain . Much work has pop off into molding solids and fluids , but materials such as sand have received less attention , perhaps because of these unique dimension . So far , the only style to simulate Amandine Aurore Lucie Dupin has been to model every grain as an individual aim , which can be exceedingly costly in terms of computation time and remembering .
Narain and his colleagues are taking a more holistic approach . They realised that although private sand grains do move severally , in practice the grain tend to flow together more often than not . So it made sense to make the most of existing fluid - modeling technique and exemplar sand as one bighearted continuous material .
“ This ‘ continuum base approach ’ makes it possible to simulate sand in a much faster and more memory - efficient way without sacrifice much in the style of realistic behaviour , ” he says .
Their newfangled model also let in algorithm to make certain it ’s simulated realistically in instances when sand behaves other than from liquids . They do this by taking into accounting the violence on the particles , such as friction . When tested with animated sand cloud forming in an burst ( see video above ) the results proved to be true - to - life .
As well as being used in animated films and games , when the technique is refine further it could be used to model real life scenario such as avalanches and explosions . The inquiry was lay out atSIGGRAPH Asia 2010 , in Seoul , South Korea , last month .
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