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Virtual Force Feedback (VFF)

This feature gives the user the feeling to interact with a solid virtual object: it helps to overcome the lack of haptic feedback. When interacting with a virtual object, the hand avatar will split into two hand representations. The ghost hand (from user's hand behavior) will continue its movement while the main one will stay stuck on the virtual element (constrained by physics).

Main hand​

avatar_hand

The hand avatar in the VFF context also represents the behavior of the user's real hand, but the hand stays against an object with which there is a collider to create the feeling of a virtual haptic feedback.

Ghost hand​

ghost_hand_blue

The purpose of the ghost hand is to represent the real-time behavior of the user’s hand. It appears when the hand avatar collides with an object. Its appearance is made gradually and discreetly so as not to disturb the user.

Physics settings for VFF​

Because the VFF feature requires physics, it is crucial to configure Physics in Project Settings as follows:

Project_Settings_Physics