Here are slides linked from that page with a reformatted version with 202 lines:

https://drive.google.com/file/d/0B8g97JkuSSBwUENiWTJXeGtTOHF...

Here's the source from those slides (I don't know who put it there).

http://codepad.org/ZWbF9yrY

I had to remove these two lines to make it compile.

    double M_PI = 3.14159265358979;
    double M_1_PI = 1.0/M_PI;