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An Interactive Design System for Plush Toys

Plushie

Yuki Mori* Takeo Igarashi*

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Outline

Introduction User interface

3D modeling operations Operations on the 2D pattern view

Implementation Physical simulation 3D modeling

Results Limitations and future work

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Introduction( )Ⅰ

Characters

Runs simulation concurrently with modeling.

Incorporates physical simulation into an interactive design process.

Combines a sketching interface and integrated physical simulation.

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Introduction( )Ⅱ

Related work Shatz et al. [2006]

Mitani and Suzuki[2004]

Julius et al. [2005]

Mori and Igarashi’s [2006]

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Introduction(Ⅲ)

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User Interface

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3D modeling operations ( )Ⅰ

Creating a new model Cut Creation of a part Pull Insertion and deletion of seam lines

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3D modeling operations (Ⅱ)

Creation of a part

Pull

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3D modeling operations (Ⅲ)

Insertion and deletion of seam lines

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Operations on 2D pattern view

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Implementation

Physical simulation Mimics the effect of internal pressure

Formula :

Figure :

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Physical simulation (Ⅰ)

Adjusts each edge length to preserve the integrity of the cloth material Formula :

Figure :

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Physical simulation (Ⅱ)

Formula : tij :The forces from the neighboring edges (Ei)

lij : represents the rest length of an edge eij

Figure :

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3D modeling (Ⅰ)

Creating a new model :

Generates two-sided mesh

Physical simulation

Updates the 2D mesh

Repeats adjustment process and the physical simulation until convergence

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3D modeling (Ⅱ)

Updates the 2D mesh

Laplacian smoothing (c)→(d) Ni is the one ring neighbor of vi

B is the boundary

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3D modeling (Ⅲ)

Examples in which our algorithm successfully found appropriate 2D patches that yielded the desired 3D shapes

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3D modeling (Ⅳ)

Cut : The right-hand side of the cutting stroke is

removed and a new mesh is created on the cross-section.

Creation of a Part :

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3D modeling (Ⅴ)

Pull :

Insertion and Deletion of Seam Lines : Insertion ： Cuts the patch along the added

seam line and updates the meshes Deletion ： Merges the patch

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Results (Ⅰ)

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Results (Ⅱ)

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Limitations and future work

Limitations

Future work Prepare several predefined material

parameters and allow the user to choose Incorporate more domain knowledge into the

system

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~The End~

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Creating a new model (Ⅰ)

Finding the spine

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Creating a new model (Ⅱ)

Pruning

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Cut

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Creation of a Part (Ⅰ)

Extrusion algorithm

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Creation of a Part (Ⅱ)

Sweeping the base ring

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Future work

More sophisticated, off-line algorithms for texture atlas generation [Milenkovic 1999; Bruno et al. 2002] and cloth simulation [Grinspun et al. 2002; Choi and Ko 2002; Breen et al. 1994] have been studied in textile industry.

It is our future work to explore a way to apply these sophisticated methods to interactive setting.