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Computer-Simulated Knitting Goes Right Down to the Yarn

Sheep sweater

Whimsically-and to demonstrate the ability to fit any form-the Cornell researchers put a sweater on a sheep.

Credit: Cornell University

Cornell University researchers demonstrated a method for building simulated knitted fabric out of an array of individual stitches at the SIGGRAPH 2012 conference.

The researchers created a three-dimensional (3D) simulation of a single stitch and then combined multiple copies into a mesh, similar to tiles in a mosaic. The computer projects the mesh onto a model of the desired shape of the garment, treating each stitch as a tiny flat polygon that can stretch and bend to fit the 3D surface.

"We are actually changing the shape of the yarn loops that make up the stitches, simulating how they wrap around other loops," says Cornell professor Steve Marschner. The result is a simulation with detail down to the yarn level. The researchers tested their method with several patterns from knitting books and were able to create images of dresses, sweaters, a shawl, and a tea cozy. They note the method also has some parameters that can be adjusted to simulate the effects of different needles or yarn, or different yarn tension used by the knitter.

From Cornell Chronicle
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Abstracts Copyright © 2012 Information Inc., Bethesda, Maryland, USA 


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