In April 2008, European researchers will demonstrate that walking through virtual environments is set to be a reality.
“In the virtual environment you have flight simulators, car simulators, but the most natural way of locomotion for humans is walking and this was practically impossible,” says Marc Ernst, the coordinator of the CyberWalk project at the Max Planck Institute for Biological Cybernetics.
To make virtual walking a reality, the CyberWalk researchers had to address five key issues: providing a surface to walk on, controlling the surface in a way that minimised forces on the user, developing a non-intrusive tracking system, displaying a high-quality visualisation, and ensuring a natural human perception of the virtual environment.
This month, at a special workshop in Tuebingen, Germany, the EU-funded researchers will demonstrate their treadmill allowing unconstrained walking in all directions (omni-directional) through large-scale virtual environments.
“Walking through a virtual city was impossible before,” Ernst says. “We are the first to demonstrate that you can walk through a virtual city or any type of extended environment.”Be natural
“A key feature is that you need a relatively large treadmill to simulate natural walking,” explains Ernst. “The one that will be demonstrated is 6m by 6m, with an active walking area of 4.5m by 4.5m.”
According to Ernst, this is the minimum size necessary for 'natural walking'.
The treadmill, or CyberCarpet, incorporates several new mechanical solutions, which ensure smooth and safe operation. The key to the CyberCarpet is a platform with a big chain drive. The chain elements are made of conventional treadmills.
The chain moves in one direction whereas the movement direction of the belts is orthogonal to that. Summing the two directions of the chain and the belts provides the omni-directional actuation principle and so the treadmill motion opposing the motion of the walker can be in any direction.
“Theoretically there is no limit to the size of treadmill. In fact, the bigger the better,” says Ernst. “But practicalities dictate that the size of the CyberCarpet is limited to the size of the room, the mechanical constraints of the construction and the money you have to spend.”
To track the walker, CyberCarpet wanted to dispense with the Hollywood-style suits covered in reflective marker balls. Its unique system uses cameras to track the position and posture of the individual. This helps control the velocity of the treadmill and interactions with the virtual environment.
Visualising the virtual environment is achieved courtesy of a commercial head-mounted display, which does have markers on it, says Ernst, because you “simply need a fast and accurate system”.Real-life applications for virtual reality
Combining the CityEngine with CyberWalk will allow people to go beyond strolling through the streets of ancient Pompeii and Rome. Architects, for example, could transport customers into the future, and allow them to walk through buildings even before they have been built.
ETHZ is considering exploiting CityEngine as a tool for the gaming industry. Talks with some game production houses are already underway.
Beyond the obvious use in entertainment, the achievements of the CyberWalk project could extend to training for firemen in dangerous scenarios, while keeping them well out of harm’s way. It could also help with medical rehabilitation for people after a stroke, people with Parkinson’s disease, or to help them overcome phobias.
The developments have also created exciting new academic possibilities for research into behavioural science and the biomechanics of human locomotion.
But the showcase demonstration is pure escapism, bringing Pompeii to life again after nearly two millennia.
Ahmed ElAmin | alfa
First machine learning method capable of accurate extrapolation
13.07.2018 | Institute of Science and Technology Austria
A step closer to single-atom data storage
13.07.2018 | Ecole Polytechnique Fédérale de Lausanne
For the first time ever, scientists have determined the cosmic origin of highest-energy neutrinos. A research group led by IceCube scientist Elisa Resconi, spokesperson of the Collaborative Research Center SFB1258 at the Technical University of Munich (TUM), provides an important piece of evidence that the particles detected by the IceCube neutrino telescope at the South Pole originate from a galaxy four billion light-years away from Earth.
To rule out other origins with certainty, the team led by neutrino physicist Elisa Resconi from the Technical University of Munich and multi-wavelength...
For the first time a team of researchers have discovered two different phases of magnetic skyrmions in a single material. Physicists of the Technical Universities of Munich and Dresden and the University of Cologne can now better study and understand the properties of these magnetic structures, which are important for both basic research and applications.
Whirlpools are an everyday experience in a bath tub: When the water is drained a circular vortex is formed. Typically, such whirls are rather stable. Similar...
Physicists working with Roland Wester at the University of Innsbruck have investigated if and how chemical reactions can be influenced by targeted vibrational excitation of the reactants. They were able to demonstrate that excitation with a laser beam does not affect the efficiency of a chemical exchange reaction and that the excited molecular group acts only as a spectator in the reaction.
A frequently used reaction in organic chemistry is nucleophilic substitution. It plays, for example, an important role in in the synthesis of new chemical...
Optical spectroscopy allows investigating the energy structure and dynamic properties of complex quantum systems. Researchers from the University of Würzburg present two new approaches of coherent two-dimensional spectroscopy.
"Put an excitation into the system and observe how it evolves." According to physicist Professor Tobias Brixner, this is the credo of optical spectroscopy....
Ultra-short, high-intensity X-ray flashes open the door to the foundations of chemical reactions. Free-electron lasers generate these kinds of pulses, but there is a catch: the pulses vary in duration and energy. An international research team has now presented a solution: Using a ring of 16 detectors and a circularly polarized laser beam, they can determine both factors with attosecond accuracy.
Free-electron lasers (FELs) generate extremely short and intense X-ray flashes. Researchers can use these flashes to resolve structures with diameters on the...
13.07.2018 | Event News
12.07.2018 | Event News
03.07.2018 | Event News
16.07.2018 | Physics and Astronomy
16.07.2018 | Life Sciences
16.07.2018 | Earth Sciences