ViSurf: Virtual Surface Modeler Project

ViSurf is a virtual surface modeler that enables users to intuitively deform virtual surfaces. With haptic feedback device, 3-dimensional cursor input as well as 3-dimensional force feedback is provided and users can actually feel touching free-formed surfaces. Direct, 3D manipulation of free-formed surfaces is a challenging research topic and has such application fields as CAD & surgical simulation.

Papers

Yamashita, J. and Y. Fukui: "A Direct Deformation Method", Proc. of IEEE VRAIS'93 (Virtual Reality Annual International Symposium '93), pp. 499 - 504, 1993.
Yamashita, J., Y. Fukui: "DDM: A Direct Deformation Method -- Two Dimensional DDM --," Transactions of IEICE D-II, Vol. J76-D-II, 1993. (in Japanese)
"ViSurf: A Tool-Based Virtual Surface Modeler with Force Feedback" (Handout of SIGGRAPH'94 Technical Sketches, 1994.)
Yamashita, J., H. Yokoi, Y. Fukui, and M. Shimojo : "A Virtual Surface Modeler for Direct and Regional Free Form Manipulation", Proc. of ICAT '94 (The Fourth International Conference on Artificial Reality and Tele-Existence), pp. 35 - 42, 1994.
Yamashita, J., H. Yokoi, Y. Fukui, and M. Shimojo : "The Concept of Tool-Based Direct Deformation Method for Networked Cooperative CAD Interface", IEICE Transactions on Information and Systems, Vol. E77-D, No.12, pp. 1350-1334, 1994.
Yamashita, J., Y. Fukui, H. Yokoi, and M. Shimojo : "3D-DDM: A Three-Dimensional Direct Manipulation Method of B-Spline Surfaces," Transactions of IEE Japan, Vol. 115-C, No.2, 1995. (in Japanese)
Yamashita, J. and Y. Fukui : "Virtual Surface Modelling with "Loosely Coupled" Force Feedback Device", Salisbury, J.K. and Srinivasan, M.A., Eds., The Proceedings of the First PHANToM Users Group Workshp, published as M.I.T. Artificial Intelligence Laboratory Technical Report AITR-1596 and M.I.T. Research Laboratory for Electronics Technical Report No. 612, December 1996. [ PDF file (45K) ] (in English)
Yamashita, J., Y. Cai, and Y. Fukui: "Feature-Based Haptic Rendering -- Architecture, Protocol, and Application," in Visual Proc. of SIGGRAPH '97, 1997. [ PDF file (23K) ] (in English)
Yamashita, J., Y. Cai, and Y. Fukui: "Feature-Based Haptic Rendering and the Protocol," in Proc. of VRSJ Annual Conf. '97, 1997. [ Japanese compressed PS file (69K) ] [ Japanese PDF file (19K) ] [ English PDF file (15K) ]
Yamashita, J., R. W. Lindeman, Y. Fukui, Y. Cai, and O. Morikawa: "Plane-Shape Perception Using Point-Contact Type Force Feedback Device," in Visual Proc. of SIGGRAPH '98, 1998. [ compressed PS file (27K) ] [ PDF file (20K) ] (in English)
Yamashita, J., Y. Fukui, O. Morikawa, and S. Sato : "On Plane Shape Perception by Displacement with a Point-Contact Type Force Feedback Device," Journal of IPSJ, Vol. 41, No. 5, 2000. (in Japanese)
Yamashita, J., R. W. Lindeman, Y. Fukui, O. Morikawa, and S. Sato: "On Determining the Haptic Smoothness of Force Shaded Surfaces," in Conference Abstracts and Applications of ACM SIGGRAPH 2000, p. 240, 2000. [ compressed PS file (67K) ] [ PDF file (20K) ] (in English)
[ Japanese PDF file on the same topic (presented at HIS2000) (48K) ]
Yamashita, J., Y. Fukui, O. Morikawa, and S. Sato: "Design of A Minimal Haptic Scene Description Library (HSlib)," in Proc. of VRSJ Annual Conference, 2000. [ PDF file (53K) ] (in Japanese)
Yamashita, J., Y. Fukui, O. Morikawa, and S. Sato : "Haptic "Smoothness" of Force-Shaded, Plygonized Cylindrical Surface," Transactions of VRSJ, Vol. 6, No. 1, pp. 3-9, 2001. (in Japanese)
Yamashita, J., Y. Fukui, O. Morikawa, and S. Sato : "Spatial Resolution in Haptic Rendering," in Conference Abstracts and Applications of ACM SIGGRAPH 2001, p. 264, 2001. [ PDF file (32K) ] (in English)
Han, H., J. Yamashita, and I. Fujishiro : "3D Haptic Shape Perception using a 2D Device," in Conference Abstracts and Applications of ACM SIGGRAPH 2002, p. 135, 2002. [ PDF file (98K) ] (in English)

Patents

USP-5,412,770 : Juli Yamashita and Yukio Fukui: "CAD Free-Form Reshaping Method," (Filed: Sep. 24, 1993, Date of Patent: May 2, 1995) [ PDF file (1.2MB) ] (in English)

Figures

Fig. A. A 2D trowel deforms a dotted curve (NU B-Spline of degree 3) into a solid curve. Thin dotted lines are control polygons. The ViSurf system automatically inserts knots to realize appropriate deformation.

Fig. B-1. Deformation with curving tools of different size.

Fig. B-2. Automatic knot insertion of a curving tool. The size of a tool shows the region it affects. UP: A B-Spline surface is shown by its knot vector values. DOWN: The curving tool pushed the surface and deformed it. Since there was not enough knots, the system automatically inserts them.

Fig. C. Effect of a twisting tool.

Fig. D. An input device with force feedback. A user takes the handle and moves it in 6 D.O.F. The device works as a 3D cursor and transmits forces to the user's hand as well. Users feel as if they are holding the handle of a real tool and pushing a form.

Fig. E. A sequence of deformation by the 6DOF I/O device. A sheet of B-Spline surface is deformed by the "pushing" operation of the device. The user feels the surface by the feedback force from the device, when the 3D cursor touches/pushes it.

Back to the AIST Home Page . Juli's home page

Last updated : Aug. 13, 2002