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LDS-1 (Line Drawing System-1) was an attached calligraphic (computer graphics) processor with a workstation terminal created by Evans & Sutherland. It was controlled by a variety of host computers. Straight lines were smoothly rendered in real-time animation. General principles of operation were similar to the systems used today - 4x4 transformation matrices, 1x4 vertices... Possible uses included flight simulation (in the product brochure there are screenshots of landing on a carrier), scientific imaging and GIS systems.
The first LDS-1 was shipped to the customer (BBN) in August 1969.
Only a few of these systems were ever built. One was used by the Los Angeles Times as their first typesetting/layout computer. One went to NASA Ames Research Center for Human Factors Research. Another was bought by the Port Authority of New York to develop a tugboat pilot trainer for navigation in the harbor.
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