The Art of Knitted Fabrics, Realistic &amp; Physically Based Modelling of Knitted Patterns

We present a hardware‐based, volumetric approach for rendering knit wear at very interactive rates. A single stitch is represented by a volumetric texture with each voxel storing the main direction of the strands of yarn inside it. We render the knit wear in layers using an approximation of the Banks model. Our hardware implementation allows specular and diffuse material properties to change from one voxel to the next. This enables us to represent yarn made up of different components or render garments with complicated color patterns. Furthermore, our approach can handle self‐shadowing of the stitches, and can easily be adapted to also include view‐independent scattering. The resulting shader lends itself naturally to mip‐mapping, and requires no reordering of the base geometry, making it versatile and easy to use. Categories and Subject Descriptors (according to ACM CCS): I.3.3 [Computer Graphics]: Hardware Applications Volumetric Textures

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“…plain or purl stitch) to vary arbitrarily across the garment (see e.g. 14 ), which at present is impossible.…”

Section: Discussionmentioning

confidence: 99%

Hardware-Based Volumetric Knit-Wear

Daubert

Seidel

2002

Computer Graphics Forum

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“…These processes produce correct knitted patterns, but are typically extremely slow (limiting them to small patches of material), and support only a limited set of stitch types much like real knitting machines. Meißner and Eberhardt [1998] estimated the appearance of some knitting patterns by using input data of a knitting machine to help generate and simulate simplified topologies. Kaldor [2011] describes a semi-automated process involving models of individual knit loops that can be tiled together to form cloth; however, constructing a new garment requires the user to write code specifying how loops are laid down, to create geometric models for any new types of loops used, and to verify that the final result is topologically correct.…”

Section: Prior Workmentioning

confidence: 99%

Stitch meshes for modeling knitted clothing with yarn-level detail

et al. 2012

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Figure 1: Stages of our knitted garment modeling system: (a) We begin our interactive modeling process with a polygonal mesh that specifies the global shape of the cloth model; (b) using this polygonal mesh we produce a high-resolution stitch mesh that serves as a canvas-like abstraction of the yarn model; (c) then, we specify the desired knitting pattern over the stitch mesh's surface. (d) Following the interactive modeling process, the model goes through offline relaxation, beginning with a mesh-based relaxation that moves the stitch mesh to the subdivision surface of the input model and slides its vertices over this surface based on the topology of the knitting pattern; finally, (e) we generate the yarn curves and (f) use a physically based relaxation process at the yarn level to compute the final realistic shape. AbstractRecent yarn-based simulation techniques permit realistic and efficient dynamic simulation of knitted clothing, but producing the required yarn-level models remains a challenge. The lack of practical modeling techniques significantly limits the diversity and complexity of knitted garments that can be simulated. We propose a new modeling technique that builds yarn-level models of complex knitted garments for virtual characters. We start with a polygonal model that represents the large-scale surface of the knitted cloth. Using this mesh as an input, our interactive modeling tool produces a finer mesh representing the layout of stitches in the garment, which we call the stitch mesh. By manipulating this mesh and assigning stitch types to its faces, the user can replicate a variety of complicated knitting patterns. The curve model representing the yarn is generated from the stitch mesh, then the final shape is computed by a yarn-level physical simulation that locally relaxes the yarn into realistic shape while preserving global shape of the garment and avoiding "yarn pull-through," thereby producing valid yarn geometry suitable for dynamic simulation. Using our system, we can efficiently create yarn-level models of knitted clothing with a rich variety of patterns that would be completely impractical to model using traditional techniques. We show a variety of example knitting patterns and full-scale garments produced using our system.

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“…In the last papers a new model was created by assuming that the orthogonal projection of the yarn path is formed of smoothly connected arcs. Different modelling of the geometrical structure of the knitted fabric is considered in [ 11,12 ].…”

Section: Introductionmentioning

confidence: 99%

Modelling and experimental verification of mechanical properties of cotton knitted fabric composites

Kononova¹,

Krasņikovs²,

Dzelzītis³

et al. 2011

Estonian J. Eng.

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This paper presents analytical and experimental procedures for estimating elastic properties of a plain weft-knitted fabric and of polymer composite materials reinforced by it. Cotton yarn and fabrics are being considered as an environmentally friendly alternative to synthetic reinforcement in polymer composites. In the present investigation, cotton yarn of different length and cotton knitted fabric specimens of different knitting directions were tested by tension in order to obtain the stress-strain response. Elastic moduli of the cotton yarn and knitted fabrics, having different load span and knitting directions, were obtained. Cotton knitted fabric composites with thermoset polymer matrices were manufactured and tested for stiffness and strength. Based on the Leaf and Glaskin model, a numerical (FEM) elastic properties averaging model was elaborated. Calculated elastic properties of composite materials have shown high compatibility with experimentally obtained values.

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The Art of Knitted Fabrics, Realistic & Physically Based Modelling of Knitted Patterns

Cited by 39 publications

References 6 publications

Hardware-Based Volumetric Knit-Wear

Hardware-Based Volumetric Knit-Wear

Stitch meshes for modeling knitted clothing with yarn-level detail

Modelling and experimental verification of mechanical properties of cotton knitted fabric composites

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