Method parameterExpression

This is the primary driver of the RPN (reverse Polish notation) expression processor. It handles all math outside of a "traditional" Jmol SELECT/RESTRICT context. [Object atomExpression() takes care of that, and also uses the RPN class.] @param pt token index in statement start of expression

(int pt, int ptMax, String key,
                                     boolean ignoreComma, boolean asVector,
                                     int ptAtom, boolean isArrayItem,
                                     Map<String, SV> localVars,
                                     String localVar,
                                     boolean isSpecialAssignment)