A Comparative Study of Collider Types & Input Methods for Interaction with Nested Holograms

Mixed reality-based medical holography is expected to have powerful applications in many surgical fields through easy and intuitive interaction with anatomic holograms using gestures. However, interaction with nested holograms using default gesture interaction, as is the case in visualized complex anatomic structures, is found to be challenging. This work develops, implements, and compares two modes of interaction with nested holograms, using native gestures and 3D SpaceMouse. Each of this mode uses ray casting and either Box Collider (BC) or Mesh Collider (MC) techniques to select target hologram. The use of SpaceMouse is found to have superior control over the selection of nested holograms irrespective of the mode of interaction, while a combination of native gestures and BC mode seems to most improve the efficiency of interaction of a selected nested hologram.