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The oplot input

  The input for oplot is a description of three dimensional objects to be plotted. The input consists of keywords followed by values. Keywords and values are separated by spaces, newlines or tabs. The input is completely free format, as the parser sees the input as a stream of tokens. The parser automatically converts integer values to floating point, but not vice versa. All oplot commands must be lower case.

The syntax of the oplot input is strict. Drawing commands, such as move, line or text may only be present inside an open object. If oplot discovers a syntax error, it simply stops, with an indication of which input line the error occured (usually, the next line is where the problem lies). However, the syntax is also simple, so hopefully it should be easy to debug input files. The oplot input syntax is very similar to the O graphics descriptor language, but not completely identical.