Category

Computers & Programming

AutoResponder

New PHP AutoResponder

The AutoResponder, described in more detail here, is a program, a set of web pages, and some scripts, that automatically respond to email and SMS text messages. I wrote the AutoResponder a few years ago for a puzzle race. During a race, it is handy for teams to…

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Computers & Programming

Circle Intersection in JavaScript

I updated the geometric constructions page to have a circle intersection demo. Circle Intersection Demo I also added a few links to see the HTML/PHP code for the page as well as the javascript for the page. PHP is nice enough to supply a function for displaying the…

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Linkage Program

New Linkage 2.11 Available

The latest version of Linkage 2 is available here. New or Different The arrow keys will now step the simulation forwards and backwards. The old [ and ] keys still work. Holding the shift key while pressing a left or right arrow will step the simulation 10 steps…

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Linkage Program

Fixed DXF Export in Linkage Program

I discovered that my code was using the screen zoom in one of the DXF export calculations, and that the math used to guess at a good connector radius was not quite right. After fixing those two issues, I also made a change to improve the solid link…

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Linkage Program

Weird Sliding Connector Bug

The Linkage program is showing a really weird bug. Bug In the picture, it is obvious that the dotted line that is the arc between two connectors A & C, is not passing through the sliding connector D. This gets worse with time until the triangle shaped link…

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