About me

I am an Associate Professor in the School of Computing at Clemson University and director of the Motion Planning Lab. My research revolves around robotics, AI, and computer graphics focusing primarily on the development of motion planning algorithms for autonomous agents in both virtual and physical settings. Such algorithms have important real-world applications from designing safer public spaces and immersive virtual worlds to improving autonomous navigation for self-driving cars, household robotics, and automated warehouses.

Before joining Clemson, I was a postdoctoral researcher in the Department of Computer Science & Engineering at the University of Minnesota. I received my PhD in computer science from Utrecht University, where I developed motion planning algorithms for crowd simulation purposes working under the supervision of Prof. Mark Overmars and Prof. Frank van der Stappen. I am a recipient of the NSF CAREER award and an Amazon Research award and I have been serving on the editorial board of IEEE Robotics and Automation Letters and Elsevier's Robotics and Autonomous Systems.

Research

My main research interests include motion planning, crowd simulation, character animation, data analysis, and reinforcement learning. I am particularly interested in the development of motion planning algorithms for autonomous robots, physically simulated humans, and crowds of virtual characters.

Teaching

• Spring 2023: CPSC 8810 - Motion Planning. After a 2-year of hiatus, I'm excited to be offering again Motion Planning! CECAS grad students from all 3 campuses are welcome to register. We will cover motion planning techniques with applications to robotics and interactive computer graphics. The course will involve programming assignments, guest lectures from experts in the field, and a final project. More to follow.
• Fall 2022: CPSC 4040/6040. I am teaching Computer Graphics Images this fall. See the course website for details.
• Spring 2021: CPSC 8810 - Deep Reinforcement Learning. This is a newly designed graduate course aimed to expose students to state-of-the-art deep reinforcement learning algorithms and provide them experience with implementing such methods in the contexts of robotics and interactive computer graphics. The course involves synchronous lectures via Zoom.
• Fall 2020: CPSC 4420/6420 - Artificial Inteligence. The course will involve both synchronous lectures via Zoom, as well as pre-recorded lectures followed by live Q&A.
• Spring 2020: CPSC 8810 - Motion Planning . I am thrilled to be teaching motion planning this semester across three campuses (Clemson, ICAR, CURI-Charleston). This year will have a number of assignments on local collision avoidance, sampling-based planning (PRM, RRT), and RL-based control. See the course website for details.
• Fall 2019: Intro to AI, and Computer Graphics Images.
• Spring 2019: I'm teaching Motion Planning (CPSC 8810), and Intro to AI (CPSC 4820/6820). CPSC4820/6820 is a new course with the goal of providing an introduction to the fundamental concepts of Artificial Intelligence and Machine Learning. Topics will include: agents, uninformed and informed search techniques, reinforcement learning, perceptrons, and supervised learning. The course is suitable for undergraduate and young graduate students to gain a solid technical background and as a preparation for more advanced work in AI. See the course website for details.
• Fall 2018: CPSC 4040/6040. I am teaching Computer Graphics Images this fall. See the course website for details.
• Spring 2018: CPSC 8810. I am teaching motion planning this semester. We will cover different techniques with applications to robotics, and interactive computer graphics. The class will involve programming assignments, as well as a final project, either simulation-based or on a Turtlebot. See the course website for details.
• Fall 2017: CPSC 4040/6040. The class will focus on the theory and practice behind the generation and manipulation of digital images. Topics include image representation and storage, color systems, affine and general warps, compositing, morphing, and non-photorealistic transformations. See the course website for details.
• Spring 2017: CPSC 8050. The class will focus on motion planning techniques for robotics and computer graphics with topics that include A*, dynamic programming, local collision avoidance, kalman filtering, numerical optimization, etc. See the course website and here for more details.
• Fall 2016: CPSC 6040 - Computer Graphics Images.

Recent Projects

NH-TTC Robot Steering

Multi-agent Navigation
Under Uncertainty

Interactive Crowd Analysis

Planning Under Uncertainty

News

• New paper at IEEE RA-L on multi-modal vehicle trajectory prediction, extending our SocialVAE work to account for both social and environmental context in a unified manner. Congrats to Dr. Pei Xu!
• New paper at SIGGRAPH'23/TOG in collaboration with Roblox and UC Merced on synthesizing composite motions for physically simulated humanoids. Congrats to Pei Xu and Xiumin Shang!
• Congrats to Pei Xu for successfully defended his PhD proposal. Looking forward to his dissertation defense in Spring 2023!
• New paper at ECCV 2022 on human trajectory prediction. Congrats to Pei Xu.
• New lab website available here.
• Congrats to Zachary Russ for getting his BS in Computer Science! If you're looking for a software engineer with a graphics and artistic background, you should consider hiring him.
• We will present our latest work on human-inspired multi-agent navigation at the upcoming IROS 2021 conference. See here for paper version and related code.
• New paper at SCA 2021 on interactive control of physically simulated characters. Congrats to Pei Xu!
• Excited to serve once more as a program committee member for AAAI. AAAI-22 is scheduled to take place in Vancouver.
• Congrats to Avishek Biswas and Foram Joshi for successfully defending their MS theses! Congrats to DN Cherry for getting her MFA in Digital Production Arts!
• Awarded the NSF CAREER Award! April 20, 2021.
• MIG 2020 is a couple of days away! We are excited to announce five outstanding keynote talks revolving around robotics, physics, machine learning, and computer graphics. Consider registering for the virtual conference. Registration is free!
• New paper at Robotics and Autonomous Systems on distributed coordination between robots navigating in shared spaces. See here for the article and here for related code.
• New paper at IROS 2020 on learning policies for a continuum manipulator. Congrats to Chase Frazelle.
• New paper at RSS 2020 on non-holonomic time-to-collision robot steering. Details and example code is available here.
• Delighted to receive the Amazon Research Awards. Big thanks to Amazon Science.
• We are organizing the ACM/SIGGRAPH MIG 2020 conference in Charleston, SC (virtual).
• I'm on the program committee of IJCAI 2020. We'll be in Yokohama this year!
• I'm on the program committee of AAAI 2020. See you in NY!
• Real-time, high-quality navigation of mobile robots having arbitrary motion models? Check our recent work for more details.
• The Deep Orange 10 project concluded earlier this summer. Congrats to all students and research scholars! Check here for some cool videos of a golf cart performing autonomous parking based on the work of Adityaveer Raswan, Rohith Krishnan, and Solomon Pizzocaro. More videos will follow.
• I'm on the program committee of IJCAI-19. This year we will be in Macao!
• New paper at SIGGRAPH Asia 2018 on learning a representative space of local navigation scenarios from pedestrian data, and automatically recommending appropriate crowd navigation methods for a scenario in hand.
• I'm on the program committee of AAAI-19. The conference will take place in Hawaii.
• Funded postdoc in character/humanoid control and planning. See here for details. Feel free to contact me if you're interested.
• New paper at SCF 2018 on controlling material properties of textile using embroidery-based stitching. Congratulations to Ella Moore.
• I've finally had some time to put the Implicit Crowds code online.
• New paper on adaptive learning for multi-agent navigation will appear on Autonomous Robots.
• Thrilled to give an ivited talk on "Human Data and Learning for Multi-Agent Navigation" at CIMAT - Computer Science seminar series in Guanajuato, 12/07/2017.
• I'm on the AAMAS - Robotics track program committee. This year AAMAS is part of the Federated AI Meeting that takes place in Stockholm July 9-19.
• I'm on the program committee of AAAI-18. See everybody in New Orleans!
• Gave an invited talk at the College of Charleston - Computer Science Research Speaker series, 11/14/2017.
• New paper on local collision avoidance under sensing uncertainty will be presented at RSS 2017. Congratulations to Zahra Forootaninia.
• Gave an invited talk at “Pedestrian Dynamics: Modeling, Validation and Calibration” topical workshop, organized by ICERM - Brown University , 08/22/2017.
• New paper on implicit integration for crowd dynamics will be presented at SIGGRAPH 2017. More information is available here.
• Congratulations to Devin Lange for his paper at EuroVis 2017.
• Some advice on how to act if you get caught up in a crowd.
• I'm on the program committee of IJCAI 2017. Consider submitting a paper!
• I've recently been appointed as an associate editor for Elseviers' Robotics and Autonomous Systems journal.
• We are expanding the DPA program to the city of Charleston! Students and post-graduates interested in the areas of robotics, animation, and graphics feel free to contact me.
• Our new paper on inferring agent types for navigation problems will appear at IJCAI.
• Our paper on coverage planning under sensing and localization uncertainty will appear at IEEE Robotics and Automation Letters and be presented at ICRA 2016.
• Our paper on implicit coordination in multi-agent navigation has been accepted at AAAI-16.
• The new Game AI Pro2 book, which includes our chapter about anticipatory collision avoidance, is out.
• Our new analysis of a large corpus of pedestrian data reveals the existence of a universal power law governing pedestrian interactions. See here for details and related code.
• Code for the Predictive Avoidance Model developed during my PhD is available here.