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Progamming...

These utilities are written using Richard Russell’s BBC Basic for Windows. A free demo version is available from his site which is fully functional but for the ‘Compile’ command  to create free standing executable files and limited to 8Kb (256Mb for full version!) programming memory.

Quaternion Maths...

The rotations use quaternions  a topic about which I was totally unaware until I read the posting by  Luis Peiro in the Chaoscope mailing list. The are ‘very complex’ numbers in that they contain not one but three square roots of -1. If you wish to know more, Google gives over half a million hits for quaternion multiplication.

Web construction,,,

Just about my first venture beyond hand coded html -- using Serif’s WebPlus.