Immersive Gesture Interfaces for Navigation of 3D Maps in HMD-Based Mobile Virtual Environments

Algorithm 1

Recognition of navigation gestures and their magnitude.

A: left/right angle

D: up/down angle

HL: horizontal threshold

R: right hand

L: left hand

CA: left/right magnitude

VL: vertical threshold

CD: up/down magnitude

MD: distance threshold

(1)  if A > HL

(2)   if R > L

(3)         CA = −A;

(4)   else CA = A;

(5)  if D > VL

(6)   if R > L

(7)         CD = −D;

(8)   else CD = D;

(9)  else CD = 0;

(10) if Distance - MD > SpeedUp

(11)   accelerate;

(12) else if Distance - MD < SpeedDown

(13)   break;