FuncPars - a Java function parser

• A given mathematical formula is given a string.
• It is then parsed and converted into a RPN expression (reversed polnish notation).
• After this, it can be calculated as often as needed, with better speed as when parsing the formula again for every calculation (RPN uses a simple stack for evaluation).
• Changing values can be held in up to 3 variables (called x,y,z), but this can be extended
• Currently, the only function (besides +,- etc.) supported is sin(x), but FuncPars is easy to extend with new functions.
• It is even possible to add new operators (this is the same as adding new functions), so it is possible to even support boolean function (e.g. if you want to write a preprocessor like cpp and need to evaluate #IF expressions)

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