> Motivation
> Example Movie
> Comment
> Conclusion
> Related Experiments
> Setup


Performance Photo

Screenshot

> Top

 

Motivation

A flat surface close to the observer is a bad carrier of spatial information. Rather than supporting a spatial impression, the information attached to it makes it noticeable as a flat object, which lets us quite plainly perceive the antagonism. Stereoscopic projections overcome that problem by presenting a different image to each eye. If done well, the carrier surface is not noticeable anymore. The other way around the carrier looses importance if it does not show an image at all. We wanted to show selected pieces of an image representing a space and link the visibility to the body's motion, thus letting the observer construct a memorized conception of the space.

 

> Top

 

Example Movie

Stage View
Computer Image
The sensor on the left hand of the dancer is moving a light source inside the virtual space in which a table, two chairs and a column are placed. The movements of the dancer put light on a certain section within the virtual space, thus the movements become an exploration of the space.

 

> Top

 

Comment

The essence of this experiment was to get beyond the point of purely exploring the digital room with the light, but also to acknowledge that initial movements would create different kinds of lighting. We considered trying to position the sensor to other places than the hand, maybe even attaching two sensors and combining their directions into one light (or having two simultaneously moving lights).

The movement was strongly guided by the exploring aspect of this set-up. The first, simple idea of attaching a virtual light to a body part and having this person explore the surroundings of the virtual room does not hold a viewers attention for very long. The movement could separate itself from the basic exploring quality and become more independent.

The fact that what Thomas was attempting to do was new to him made him alter the way he would put his body into reduced shapes. Those shapes were informed by and formed in regard to the objects in the room like the table, the chairs or the walls.

 

> Top

 

Conclusion

Apart from the fact that the displayed space is not very interesting (which is not the focus of our experiments), the idea of letting the spectator construct a mental model of a space seem to work. Showing the complete perspective projection on a plane flattens the visual impression. Showing just details of a consistent space exploits our mechanism to create a mental model of the space surrounding us by looking around.

Of course the visual impression at any moment is still not three dimensional like with a stereoscopic display, but not showing the complete flat image gives our brain the freedom to retain its hypothesis of the space.

 

> Top

 

Related Experiments:

 

> Top

 

Setup


 

Hardware:

  • Graphics PC
  • Projector
  • Polhemus tracking system: 1 Sensor

 

Configuration:

  • The Sensor is attached to the dancer's left hand. The position of the sensor is controlling the position and orientation of a directional light source. The Technical Screenshot below shows the sensor as a green wireframe sphere and the directional light source as a white wireframe cone.

 


Technical Setup

Spatial Setup

Technical Screenshot

Performance Photo
> Top