Mathieu Desbrun
California Institute of Technology, USA

Mark Pauly
ETH, Switzerland

Takeo Igarashi
University of Tokyo , Japan

Invited Talk1

Mathieu Desbrun
Department of Computer Science, California Institute of Technology, USA

TITLE: Designing Tetrahedral Meshes and Putting Them To Good Use

ABSTRACT: Meshing lies at the heart of many computational techniques across a wide range of fields. The meshing task consists of finding a set of simple elements (typically vertices, edges, triangles, tetrahedra) which best partition a given domain while approximating its boundaries. However, meshing a domain is complicated by requirements on the "quality" of its elements: badly shaped elements (too flat, too stretched, etc.) must be avoided as the presence of even a single one can ruin the convergence and/or accuracy of a computational method. In this talk, we will focus on the simple yet common case of isotropic tetrahedral meshing, and present new results linking Delaunay/Voronoi tessellations to approximation theory. We will then briefly mention recent work on developing a geometry-based, principled approach to computational modeling that benefits from such meshes. Examples ranging from processing of scanned geometry to simulation of incompressible fluids will be used to illustrate the numerical benefits.

SHORT BIOGRAPHY: Mathieu Desbrun is an Associate Professor at the California Institute of Technology (Caltech). After receiving his Ph.D. from the National Polytechnic Institute of Grenoble (INPG), he spent a year as a post-doctoral researcher at Caltech in the Multires Modeling Group before joining the Computer Science faculty at the University of Southern California from 2000 to 2004. He now leads the Applied Geometry lab at Caltech, focusing on discrete differential modeling---the development of differential, yet readily discretizable foundations for computational modeling---and a wide spectrum of applications, ranging from discrete geometry processing to solid and fluid mechanics and field theory. Desbrun is an Associate Editor for the ACM Transactions on Graphics, and regularly serves on program committees of international graphics venues. He is the recipient of an ACM SIGGRAPH New Significant Researcher award, and of a NSF CAREER award. Visit for more information.

Invited Talk2

Mark Pauly
Department of Computer Science, ZTH Zurich, Swiss

TITLE: The Symmetry of Things

ABSTRACT: In this talk I will look at symmetry as one of the fundamental principles in nature, art, and engineering, and illustrate the potential of symmetry for shape modeling. After a brief historic overview, I will discuss mathematical models of symmetry and introduce computational tools for structure discovery and symmetry enhancement in 3D geometric models. The talk concludes with an outline of future research opportunities in symmetry-aware geometric processing.

SHORT BIOGRAPHY: Mark Pauly is an assistant professor at the CS department of ETH Zurich. From August 2003 to March 2005 he was a postdoctoral scholar at Stanford University, where he also held a position as visiting assistant professor during the summer of 2005. He received his Ph.D. degree (with distinction) in 2003 from ETH Zurich and his M.S. degree (with honors) in 1999 from TU Kaiserslautern. His research interests include computer graphics and animation, geometry processing, and computational geometry. He was recipient of a full-time scholarship of the German National Merit Foundation, received the ETH medal for outstanding dissertation, and was awarded the Eurographics Young Researcher Award in 2006. Visit for more infromation.

Invited Talk3

Takeo Igarashi
Department of Computer Science, University of Tokyo, Japan

TITLE: Interactive "smart" computers

ABSTRACT: Current user interfaces are not very "smart" in that computers dumbly do what the user explicitly commands it to do via buttons or menus. As the computers become more capable and applications become complicated, more "smart" user interfaces are desired. We are exploring possible "smart" user interfaces in the domain of pen-based computing and interactive 3D graphics. The idea is to allow the user to intuitively express his/her intention by combining sketching and direct manipulation, and have the computer take appropriate actions without explicit commands. This talk consists of many live demonstrations to illustrate the idea of interactive "smart" interfaces. I plan to show 2D geometric drawing program, electronic whiteboard system, sketch-based 3D modeling, automatic zooming, clothing manipulation interfaces, and other interesting systems.

SHORT BIOGRAPHY: Takeo Igarashi is an Associate Professor at CS department, the University of Tokyo. He was a post doctoral research associate at Brown University Computer Graphics Group during June 2000 ĘC February 2002. He received PhD from Dept of Information Engineering, the University of Tokyo in 2000. He also worked at Xerox PARC, Microsoft Research, and CMU as a student intern. His research interest is in user interface in general and current focus is on interaction techniques for 3D graphics. He received The Significant New Researcher Award at SIGGRAPH 2006. Visit for more information.