Funding for this research was provided by:
Zhejiang Provincial Natural Science Funding (Q19F020034)
State Key Laboratory of Novel Software Technology (KFKT2019B18)
National Natural Science Foundation of China (61902097)
State Key Laboratory of Virtual Reality Technology and Systems (VRLAB2020B03)
Article History
Received: 17 March 2017
Accepted: 14 July 2020
First Online: 25 July 2020