Intro

As long ago as 30 years, graphic researchers were well on their way to moulding what we now term virtual reality (VR). At that time we saw our first head/ceiling mounted display for interactive stereoscopic wire frame viewing, and had appropriated flight simulator technologies to develop tracking devices for human motion. Twenty years ago, some of the same pioneers gave us the invaluable ‘walking algorithm’: a code to describe the gait of a human walk which was then transcribed into a computer graphic stick figure. We have been working ever since to really make it a reality.