Nice illustration of the Dot product technique, now I know it’s officially called Barycentric Technique, with flash animation

http://www.blackpawn.com/texts/pointinpoly/default.html

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Browsing the internet today I found an impressive piece of Open Source. By Eric Bergman-Terrel, the Open Source C# Programmable Calculator lets you program functions for the calculator using C#. It compiles the code you write it on the fly; now I know what I will use when I need a scripting system for my applications.

http://www.personalmicrocosms.com/pages/cspcalc.aspx

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