Also known as gaze-based cursor. If we set the cursor to be fuse-based, the cursor will trigger a click if the user gazes at an entity for a set amount of time. Imagine a laser strapped to the user’s head, and the laser extends out into the scene. If the user stares at an entity long enough (i.e., the fuseTimeout), then the cursor will trigger a click.
The advantage of fuse-based interactions for VR is that it does not require extra input devices other than the headset. The fuse-based cursor is primarily intended for Google Cardboard applications. The disadvantage of fuse-based interactions is that it requires the user to turn their head a lot.