3D Selection Vault

Cone&Bubble

Also known as Cone and Bubble, GazeHand (Cone&Bubble)

Two pointers at once: one modality casts a cone that pre-selects the few nearest candidates, and a second casts a bubble ray that picks the final target among them.

How it works

A cone pointer (from gaze, head or controller) adapts its width so that a preset number of candidates (four in the study) fall inside it; these are highlighted. A second modality casts a bubble ray that selects the candidate closest to it, so even tightly packed candidates can be told apart by aiming toward the cone's edge. Both pointers move in parallel without a mode switch, and a button confirms. All six permutations of gaze, head and controller were compared (N=12, HTC Vive Pro Eye, targets 5–25 m away in a dense scene): gaze worked best for the cone and the hand controller for the bubble ray (GazeHand was fastest).

Papers