1. CGM NTUST An Interactive Design System for Plush Toys Plushie Yuki Mori* Takeo Igarashi*

2. 2 Outline  Introduction  User interface  3D modeling operations  Operations on the 2D pattern view  Implementation  Physical simulation  3D modeling  Results  Limitations and future work

3. 3 Introduction( Ⅰ )  Characters  Runs simulation concurrently with modeling.  Incorporates physical simulation into an interactive design process.  Combines a sketching interface and integrated physical simulation.

4. 4 Introduction( Ⅱ )  Related work  Shatz et al. [2006]  Mitani and Suzuki[2004]  Julius et al. [2005]  Mori and Igarashi’s [2006]

5. 5 Introduction( Ⅲ )

6. 6 User Interface

7. 7 3D modeling operations ( Ⅰ )  Creating a new model  Cut  Creation of a part  Pull  Insertion and deletion of seam lines

8. 8 3D modeling operations ( Ⅱ )  Creation of a part  Pull

9. 9 3D modeling operations ( Ⅲ )  Insertion and deletion of seam lines

10. 10 Operations on 2D pattern view

11. 11 Implementation  Physical simulation  Mimics the effect of internal pressure  Formula :  Figure :

12. 12 Physical simulation ( Ⅰ )  Adjusts each edge length to preserve the integrity of the cloth material  Formula :  Figure :

13. 13 Physical simulation ( Ⅱ )  Formula :  t ij :The forces from the neighboring edges (E i )  l ij : represents the rest length of an edge e ij  Figure :

14. 14 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

15. 15 3D modeling ( Ⅱ )  Updates the 2D mesh  Laplacian smoothing (c)→(d)  N i is the one ring neighbor of v i  B is the boundary

16. 16 3D modeling ( Ⅲ )  Examples in which our algorithm successfully found appropriate 2D patches that yielded the desired 3D shapes

17. 17 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 :

18. 18 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

19. 19 Results ( Ⅰ )

20. 20 Results ( Ⅱ )

21. 21 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

22. 22 ~The End~

23. 23 Creating a new model ( Ⅰ )  Finding the spine

24. 24 Creating a new model ( Ⅱ )  Pruning

25. 25 Cut

26. 26 Creation of a Part ( Ⅰ )  Extrusion algorithm

27. 27 Creation of a Part ( Ⅱ )  Sweeping the base ring

28. 28 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.