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Digistar


Published on Dec 17, 2015

Abstract

Evans & Sutherland's star projection system, Digistar II, is a real-time, computer graphics based system intended to entertain and educate large audiences. Show producers can create environments that completely immerse audiences in 3D real-time computer generated images.

Digistar II is a special-purpose computer graphics system that can do everything a conventional planetarium system can do in addition to other advanced features. Besides simulating traditional planetarium objects, Digistar II generates new special effects, such as dynamic proper motion and travel through three-dimensional space.

Digistar II can display these kinds of images and effects:

· Stars
· Planets and moons
· Asteroids and comets
· Eclipses and transits
· Constellations
· Coordinate lines
· Nebulous objects
· Meteors and comets
· Mathematical models
· Chemical structures
· Architectural models
· Movement through 3D space
· Movement through time
· Classic planetarium motions
· Proper and space motions
· Stellar Parallax

A Digistar II show can be designed to run completely preprogrammed or use live input. Real-time manipulation of show segments, objects, dates, and eyepoint locations is possible.

System Components

The major components of a Digistar II system, as described in following sections, are as follows:

· Workstation

· Graphics processor

· Projector

· Peripheral input devices

· SMPTE time controller

· Graphics monitor

· Isolation transformer

· Optional Sun/Moon projectors

· Software

· Documentation

Digistar II star projector is located in the center of the theater. The isolation transformer is typically located in a control room adjacent to the console. The remainder of the equipment can be located at the theater control console.














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