Virtual Reality Applications Center, Iowa State University, Ames, IA 50010, USA. linyongmao@gmail.com|Virtual Reality Applications Center, Iowa State University, Ames, IA 50010, USA. linyongmao@gmail.com|Virtual Reality Applications Center, Iowa State University, Ames, IA 50010, USA. linyongmao@gmail.com|Virtual Reality Applications Center, Iowa State University, Ames, IA 50010, USA. linyongmao@gmail.com