The Raster-scan Intelligent Graphics Engineering Language (RIGEL) is a high-level command language which greatly simplifies the task of programming real-time color graphic displays. The RIGEL language is must easier to learn than a conventional subroutine graphics package, is nearly free-format, and is easy to maintain. In addition, it enables the user to define his own symbol library, and incorporates a mechanism for decreasing picture-generation overhead, which is very important in real-time applications.The RIGEL language works as an extension to the ANSI-standard FORTRAN language, which is a language familiar to most engineers and supported on most computers. A preprocessor translates the graphics commands to FORTRAN statements, and an assembler produces Ramtek object code from the compiled FORTRAN source. This object code is transmitted to the display processor, which generates the display on the monitor.
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