Smooth spline surface generation over meshes of irregular topolo.ppt

Smooth spline surface generation over meshes of irregular topology J.J. Zheng, J.J. Zhang, H.J.Zhou, L.G. Shen The Visual Computer(2005) 21:858-864 Pacific Graphics 2005 Reporter: Chen Wenyu Thursday, Mar 2, 2006 About the author Introduction Zheng-Ball surface patch Irregular closed mesh Irregular open mesh Conclusions About the author 郑津津, professor 中国科学技术大学精密机械与精密仪器系. He received his Ph.D. in computer aided geometric modelling from the University of Birmingham, UK, in 1998. His research interests include CAGD,computer-aided engineering design, microelectro-mechanical systems and computer simulation. About the author 张建军, professor Bournemouth Media School, Bournemouth University. Ph.D. 1987, 重庆大学. His research interests include computer graphics, computer-aided design and computer animation.. About the author H.J. Zhang, 高级工程师 中国科大国家同步辐射实验室. She received her M.Sci. from the University of Central England Birmingham, UK.. Her research interests include mechanical design, micro-electro-mechanical systems and vacuum technology. About the author 沈连婠, professor 中国科学技术大学精密机械与精密仪器系. Her research interests include e-design, e-manufacturing, e-education and micro-electromechanical systems About the author Introduction Zheng-Ball surface patch Irregular closed mesh Irregular open mesh Conclusions Introduction Regular mesh: each of the mesh points is surrounded by four quadrilaterals Introduction generate surfaces over regular meshes: B-spline surfaces…. generate surfaces over irregular meshes:final surface be  ---subdivision surfaces ---spline surface Introduction subdivision surfaces C-C subdivision C2Doo-sabin subdivision C1 Spline surface Spline surfaces Peter(CAGD 93); Loop(sig94) 1. Doo-Sabin subdivision 2. a patch for a pointregular mesh : bi-quadratic B-splineirregular area : bi-cubic surface or triangular patch Spline surfaces Loop,De