3D Virtual Pad: Intuitive User Interface for Inputting Seamlessly Movement Directions and Actions of a Game Character Using a Pressure Sensor
The aim of this invention is to enhance an existing virtual d-pad-like UI for allowing a user to input a fast movement command, such as running, of characters, without occupying large area on a touchscreen. The latest smartphones equip force sensors or pressure sensors behind of a touch screen, to capture force/pressure (z-axis) of a touch event with its position information (x-axis and y-axis) when a user touches the screen strongly. This invention utilizes this force sensor’s value as parameters for acceleration of character’s movement. Concretely, this invention configures the character’s speed according to the force detected by the sensor, when a user inputs a speed of character’s movement by pushing the screen strongly, after inputting movement direction by using d-pad. The inventive step of this invention is in “ratchet function” that keeps the current speed of character movement as long as a user is holding his/her finger on the screen (namely the user keeps on inputting character movement command), even if the force sensor’s value decreases. In addition this invention provides two different types of motions according to continuous force and very short period force. For example, a user accelerates by putting the continuous force, and the user decelerates by putting the force within very short moment (e.g.100 milliseconds). We call such short moment operation as “interruption”. Thus, this invention realizes both acceleration and deceleration operation by applying the novel two functions, the ratchet function and the interruption function, to the force sensors.
Full Text: Google Patents