Re: falling paper simulation

Date : Wed, 06 Jun 2007 11:08:59 -0400
To : XSI(at)Softimage.COM
From : Kris Rivel <krisrivel(at)gmail.com>
Subject : Re: falling paper simulation
Ah yes...those salmon colored plastic bags you get down in Chinatown at the markets :-)

Kris

Eric Lampi wrote:
Well a lot of what will make it look convincing is the size of your paper.  Even still, leaves and paper do not often fall the same way.  A larger sheet of paper will flex and fold in response to wind resistance sometimes laying flat, zipping along it's plane until the leading edge curls and it folds, or it gets caught in turbulence and falls in another direction. Smaller piece can't so you will get more of a falling confetti effect - flipping end over end.  Leaves with a regular shape also fall differently than those with a more irregular shape - such as maple-seed pods that twirl like helicopters as opposed to oak, which have jagged leaves that curl up and pretty much just drift to the ground, curved side first.  Always seemed to me that the symmetrical leaves did more flipping and twirling than the jagged ones, probably because they build up more even resistance along a regular edge, enough to flip them end over end.

Yeah I am one of those weirdos that pays attention to things like that.  I grew up out in the sticks.

Now that I work in NY, I could also write a small essay on the behavior of plastic shopping bags flying around 20 stories above the street a.k.a. New York City Balloons.

E
Freelance 3-D Animator, F/X Artist
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