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doi:10.1016/0097-8493(75)90007-2 
Copyright © 1975 Published by Elsevier Science Ltd.
GRAPHEX68 Graphical language features in ALGOL 68*1
Available online 2 July 2003.
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Abstract
The facilities of ALGOL 68 for defining new data types and operations are used for the description and manipulation of pictures. Starting with points, polygons and strings as primitives, more complex pictures may be built up with operations such as uniting of pictures, positioning, scaling, and rotating. The use of the various interactive devices is shortly discussed and a sketch of the procedure, which translates the data structure being created by a GRAPHEX68 program into a graphical assembly language, is given.
