Installing Papervision3D on Flash and Flex

There are quite a few articles out there discussing Papervision3D and sharing source code, etc. but very few explain in plain English how to actually get started with PV3D. For those of us that aren’t geeky enough to guess our way into getting it to work we are usually left in a dust of confusion. Papervision3D, if you aren’t familiar with it, is a way to do 3D inside Flash – it’s extensive, cutting edge and very well laid out. More and more sites are popping up on the web utilizing this technology… so what are you waiting for?

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Runtime expression evaluation in ActionScript

A simple Actionscript library that can be used to parse mathematical expressions: it has support for function calls, for variables and it is able to convert the expression into a postfix rappresentation if you may need it. The expression parser is quite simple and have been built manually following some concepts related to programming language compilers; it includes a Scanner (or lexer – however you want to call it) to tokenize the expression, a Parser that convert the expression into an Abstract Syntax Tree and a simple routine that evaluates that AST using a Symbol Table as evaluation context.

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