Chongyang Bai(拜重阳)

Graduate in Computational Mathematics and Computer Science and Technology (Dual) , University of Science and Technology of China (USTC)

Interested in Computer Graphics and Computer Vision

RM 366-501, East Campus USTC
Hefei, Anhui 230026, P.R.China

Email: bchy1023@gmail.com

Efficient Volumetric PolyCube-Map Construction

Xiaoming Fu , Chongyang Bai , and Yang Liu
Computer Graphics Forum (Pacific Graphics) 35(7), 2016

PolyCubes provide compact representations for closed complex shapes and are essential to many computer graphics applications. Existing automatic PolyCube construction methods usually suffer from poor quality or time-consuming computation. In this paper, we provide a highly efficient method to compute volumetric PolyCube-maps. Given an input tetrahedral mesh, we utilize two novel normal-driven volumetric deformation schemes and a polycube-allowable mesh segmentation to drive the input to a volumetric PolyCube structure. Our method can robustly generate foldover-free and low-distortion PolyCube-maps in practice, and provide a flexible control on the number of corners of Polycubes. Compared with state-of-the-art methods, our method is at least one order of magnitude faster and has better mapping qualities. We demonstrate the efficiency and efficacy of our method in PolyCube construction and all-hexahedral meshing on various complex models.

Project Page

Word Reciting Module of Microsoft Bing Dictionary UWP(V2.0.0)

Chongyang Bai , Renqian Luo , Wei Zhang , Liyuan Liu , and Shuo Ren
Microsoft Store, 2016

In word reciting module of this app, we substitute the discrete choice between 'known' and 'unknown' for a continue metric of familiarity of a word(calculated by the time of recall), algorithm 'MemReflex' is employed to compute the reminder time of next word review. Based on the concept, we design a refreshing and friendly user interaction: when the user presses a button, a word is shown and clocking starts, when the user remembers the word and releases the button, the clocking ends. Our app has the following features: i.adapted in mobile, tablet and PC ii.add/remove user dictionary list iii.recting both user-created and system dictionary iv.night mode v.tag easy/hard words conveniently vi.repeal wrong operation vii.user teaching mode.

Download, Video (YouTube), Algorithm: MemReflex

Generalized PolyQuad Aided Planar Quadrilateral Mesh Generation

Chongyang Bai and Yang Liu (advisor)
Dissertation for Bachelor's Degree, 2016

Recently, various planar quadrilateral mesh generation methods are either not fully automatic and robust enough, or will produce too many singularities for complex and irregular planar domains. To solve this problem, our idea is simplifying the boundary of input triangle mesh first, i.e. deforming it to a generalized PolyQuad, and computing an inversion-free mapping between them at the same time, then using existed algorithms to generate a quadrilateral mesh of good quality, finally mapping the mesh back to the initial domain. In addition, an advanced mesh optimization algorithm is employed to improve mesh quality after the topology is determined. A medial axis based geometry decomposition method is used to prove our algorithm, which generates singularity controllable planar quadrilateral meshes efficiently and robustly.

PDF (Chinese version), Video (YouTube)

3D Action Game: Dhammapala

Wenjie Qin , Chongyang Bai , and Yuan Chang
Course Project of Computer Graphics, 2014

The game is created by Unity 3D and 3D MAX, with basic scene elements and character actions. We built the game scene and implemented the movements and fight of characters. We also implemented the mini map and different difficulty levels.

Video (YouTube)

12/2016 - now

Graphics Algorithm Developer, Oppen Future Technologies LLC.

07/2016 - 09/2016

Teaching Assistant for Software Enjineering, University of Science and Technology of China.

Instructor: Dr. Hongping Deng

09-2012 - 06/2016

Bachelor of Science in Information and Computational Science (Computational Mathematics), University of Science and Technology of China.

GPA: 3.66/4.30, Average Scores: 86.90/100

09/2014 - 02/2016

Bachelor of Engineering in Computer Science and Technology (Dual), University of Science and Technology of China.

June 2016

Stars of Tomorrow in Microsoft Research Asia Internship Program.

May 2016

Outstanding Undergraduate in University of Science and Technology of China(Top 20%).

October 2015

Outstanding Student Scholarship in University of Science and Technology of China (Top 20%).

November 2014

National Endeavor Fellowship (Top 10%).

October 2014

Kwang-Hua Scholarship (Top 10%).

October 2012

Oustanding Freshman Scholarship in University of Science and Technology of China (Top 30%).