Monthly Archives

January 2013

Linkage Program

Stephenson Valve Gear?

Upon further inspection, A Stephenson value gear mechanism cannot be built with the Linkage program. I don’t have the necessary simulation code to handle the complexity of the links. The problem comes from the connection of the “Link” to the rest of the mechanism. The position of that…

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Linkage Program

Curved Slider Path

A user asked me about curved links in the Linkage program. I think that it is safe to say that curved slider paths is the desired feature because the visual representation of a link is fairly meaningless. It is the connectors that matter. Straight Sliding Connector The straight…

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Linkage Program

Cartesian Coordinates

Computer monitors, the old CRT kind, scan from top to bottom like a TV. Before computers, that didn’t cause any problems but when people started accessing the screen, a new coordinate system (variation) was born. It was the “inverted” Cartesian coordinate system. Well, I don’t think that there…

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Linkage Program

Linkage Main Menu Sample Gallery

It turns out that moving the sample gallery into the main menu was only a little bit troublesome and only took an hour for me to figure out how to fix. The problem appeared to be that the MFC code created a new gallery window of some sort…

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Linkage Program

New Linkage Features

I was contacted by a very helpful person who tried the Linkage program and had some very good suggestions. I fixed a few bugs and then implemented a few of the less complicated features that we discussed. Fixed a problem where I had added , and . shortcut…

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Linkage Program

Locking Link Lengths – Logically

Someone suggests adding the ability to lock the length of a link. After giving this some thought, I can think of a few ways to handle it. There are some complications though and I’m not sure how to handle them. First, the questions: If someone moves a connector…

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