Figure 3. The “Path Development” custom game mode for therapist movement implementation. The right picture showcases a researcher using the iVR control to trace the path of the butterfly. The left picture indicates the movement’s path, traced in red, so the researcher can see where exactly the path is located

From

OpenButterfly: Multimodal Rehabilitation Analysis of Immersive Virtual Reality for Physical Therapy

Michael Ora Powell, Aviv Elor, Mircea Teodorescu, Sri Kurniawan

American Journal of Sports Science and Medicine. 2020, 8(1), 23-35 doi:10.12691/ajssm-8-1-5