Larry Cuba's Star Wars work is based on semi-automated filming of a GRASS system running on a Vector General 3D terminal. In 1977 another member of the Habitat, Nola Donato, re-designed many of GRASS's control structures into more general forms, resulting in the considerably cleaner GRASS3. In order to make the system more useful, DeFanti and Sandin added all sorts of "one-off" commands to the existing GRASS system, but these changes also made the language considerably more idiosyncratic. ĭeFanti added the existing GRASS system as the input to the IP, creating the GRASS/Image Processor, which was used throughout the mid-1970s. He described it as the video version of a Moog synthesizer.
#ROTATE RASTER GRASS GIS TV#
The IP was an analog computer which took two video inputs, mixed them, colored the results, and then re-created TV output.
Sandin had joined the university in 1971 and built the Sandin Image Processor, or IP. There he joined up with Dan Sandin and together they formed the Circle Graphics Habitat (today known as the Electronic Visualization Laboratory, or EVL). Īfter graduation, DeFanti moved to the University of Illinois, Chicago Circle. GRASS included a number of vector-drawing commands, and could organize collections of them into a hierarchy, applying the various animation effects to whole "trees" of the image at once (stored in arrays). As the name implies, this was a purely vector graphics machine. It was developed on a PDP-11/45 driving a Vector General 3DR display. The original version of GRASS was developed by Tom DeFanti for his 1974 Ohio State University Ph.D.
0 kommentar(er)
