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2.03B Common Types and Interface Devices and Systems of Virtual Reality

2.03 Explore virtual reality design and use.

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Types of Virtual Realities

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Types of Virtual Realities Desktop

Uses 3-D Graphics

Does not require additional equipment.

Immersive

Requires additional equipment.

Is the most effective of Virtual Reality technologies.

Eyes, ears, or other body senses are isolated from real environment and fed information that is generated by the computer.

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Types of Virtual Realities

Telepresence

Allows a person to interact with another live, real place at a different physical location other than their actual location.

Involves life-size images.

In some situations, participants may be able to manipulate devices or the environment in the remote location.

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Common Interface Devices

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Interface Devices

Head-mounted display (HMD)

http://youtu.be/3T9kfbcRrQ8

Facial sensor/body suit

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Interface Devices

Wand

Data glove

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Head-Mounted Display (HMD)

Device on top of helmet signals head movements.

A computer continually updates the simulation to reflect new perspectives.

Its viewing screen adds depth to flat pictures.

Blocks out surrounding environment.

Is popular with the entertainment industry.

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Data Glove

Programs the computer to change modes in response to gestures made with data gloves.

Some use fiber optic cables.

Some use strain sensors over joints.

Facial sensor/body suit

Sensors read facial expressions/body movements and transfer information to the computer for animation purposes.

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Wand

Is simplest of interface devices.

Most have on/off buttons.

Some have knobs, dials, or joy sticks.

Example of Use: Biologists use wands like scalpels to slice tissue samples from virtual brains.

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Wand

Wands operate with six degrees of freedom.

By pointing a wand at an object, its position and orientation can be changed in any of six directions forward or backward, up or down, or left or right

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Interface Systems

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Interface Systems

Three common systems: HMD – Head-mounted Display

BOOM – Binocular Omni Orientation Monitor

CAVE – Automatic Virtual Environment

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BOOM (Binocular Omni Orientation Monitor)

Is similar to HMD – but no helmet.

Viewing box suspended from rotating arm.

Uses handles on box sides to move image around.

Buttons on handles allow user to interact with object.

Can also hook up data gloves.

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CAVE

One of the newest, most "immersive" virtual environments.

10 x 10 x 9-foot darkened cubicle.

Is like climbing into the computer’s screen.

Display enables user to experience the. sensation of being "inside" the data.

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Advantages of CAVE

Only need special glasses and a wand instead of clunky equipment.

Has a large field of view of data that is projected in stereoscopic images onto the walls and floor of the CAVE.

Multiple users can be in CAVE at same time.

Sound can be added to images.

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Shared Virtual Environments

In this illustration, three networked users at different locations (anywhere in the world) meet in the same virtual world by using a BOOM device, a CAVE system, and a Head-mounted Display.

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Shared Virtual Environments

•The users can see each other, communicate with each other, and interact with the virtual world as a team.

•All users see the same virtual environment from their respective points of view.

•Each user is presented as a virtual human (avatar) to the other participants.

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Review

Common virtual reality Types

Interface devices

Interface systems

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