Kinetics: A Mathematical Model for an On-Screen Gamepad Controllable by Finger-Tilting

Abstract

With the rise of smartphones and mobile games, a new interaction model is in demand to allow rapid and fine-grained control of a player character. This paper presents an on-screen gamepad with a novel touchpoints analytics that enables a user to input both direction and velocity by changing only the angle of the finger, while a user keeps his/her finger placed on the almost same place of the touchscreen. The unique feature of this gamepad, called Kinetics, is a mathematical model to measure an intentional finger motion and acceleration from a continuous sequence of touch events obtained when a user changes thumb angle, by suppressing the effects of ambiguous and noisy activities. Kinetics allows a user to play a smartphone game almost as if there were an invisible pointing stick on the screen. This paper shows practical system implementation and empirical evaluation studies.

Info

URL: CHI PLAY – 2019

DOI: 10.1145/3341215.3356289

Citation: .bib format