Modeling of internal friction adds new wrinkle to realistic simulation of cloth behavior

Nov 18, 2013

Most people try to keep clothing wrinkle free, but computer graphic artists, striving for realism in computer simulations, take pains to be sure clothing wrinkles, folds and stretches naturally. A new computer modeling technique developed by Disney researchers and academic collaborators addresses this problem.

The new modeling technique seeks to replicate cloth's tendency to preferentially develop and folds in areas where they have previously occurred. The researchers accomplished this by incorporating models for internal friction – the resistance of a material to bending, stretching and compression.

"Many researchers have identified internal friction as a source of this effect, but until now no one had incorporated it into computer animation models of cloth," said Rasmus Tamstorf, senior research scientist at Walt Disney Animation Studios.

Plasticity models, which account for permanent changes in shape when force is applied, are another way to simulate these persistent folds and wrinkles, noted Derek Bradley, associate research scientist at Disney Research, Zürich. But plasticity models work best only when large forces are at play. By contrast, the internal friction models responded to even modest loads and proved more suitable for "locally persistent wrinkles."

Tamstorf and fellow researchers from Disney Research, Zürich, Cornell University, MIT and URJC Madrid adapted a widely used general for internal friction with good results. They will report their findings at the SIGGRAPH Asia 2013 conference, November 19-22, in Hong Kong.

In addition to improving the modeling of persistent or preferred wrinkles and folds, internal friction results in more realistic stretching and rebounding of cloth. Because it resists motion, internal friction also can help simulated wrinkles settle in one place faster once a character's motion stops, said Eder Miguel, a Ph.D. student in the Modeling and Virtual Reality Group at URJC Madrid.

Explore further: Ironing out the origins of wrinkles, creases and folds

More information: Eder Miguel (URJC Madrid), Rasmus Tamstorf (DR/WDAS), Derek Bradley (DRZ), Sara Schvartzman (URJC Madrid), Bernhard Thomaszewski (DRZ), Bernd Bickel (DRZ), Wojciech Matusik (DRZ), Steve Marschner (Cornell University), Miguel Otaduy (URJC Madrid) ACM SIGGRAPH Asia

www.disneyresearch.com/project/internal-friction-in-cloth/

add to favorites email to friend print save as pdf

Related Stories

Ironing out the origins of wrinkles, creases and folds

Jul 17, 2013

Engineers from Brown University have mapped out the amounts of compression required to cause wrinkles, creases, and folds to form in rubbery materials. The findings could help engineers control the formation ...

Ironing out the causes of wrinkles

Jul 15, 2010

As a sign of aging or in a suit, wrinkles are almost never welcome, but two papers in the current issue of Physical Review Letters offer some perspective on what determines their size and shape in soft materi ...

Nanowrinkles, nanofolds yield strange hidden channels

Nov 23, 2011

Wrinkles and folds are ubiquitous. They occur in furrowed brows, planetary topology, the surface of the human brain, even the bottom of a gecko's foot. In many cases, they are nature's ingenious way of packing ...

Recommended for you

User comments : 0

More news stories

LinkedIn membership hits 300 million

The career-focused social network LinkedIn announced Friday it has 300 million members, with more than half the total outside the United States.

Researchers uncover likely creator of Bitcoin

The primary author of the celebrated Bitcoin paper, and therefore probable creator of Bitcoin, is most likely Nick Szabo, a blogger and former George Washington University law professor, according to students ...

Under some LED bulbs whites aren't 'whiter than white'

For years, companies have been adding whiteners to laundry detergent, paints, plastics, paper and fabrics to make whites look "whiter than white," but now, with a switch away from incandescent and fluorescent lighting, different ...

Magnitude-7.2 earthquake shakes Mexican capital

A powerful magnitude-7.2 earthquake shook central and southern Mexico on Friday, sending panicked people into the streets. Some walls cracked and fell, but there were no reports of major damage or casualties.

Plants with dormant seeds give rise to more species

Seeds that sprout as soon as they're planted may be good news for a garden. But wild plants need to be more careful. In the wild, a plant whose seeds sprouted at the first warm spell or rainy day would risk disaster. More ...

Researchers successfully clone adult human stem cells

(Phys.org) —An international team of researchers, led by Robert Lanza, of Advanced Cell Technology, has announced that they have performed the first successful cloning of adult human skin cells into stem ...