Tag Archives: Computer

Part III: Nuts & Bolts

This is an unfinished draft for a book I wrote back in 1999 on the topic of motion control. Tomorrow I will publish the final part, just as it was written and with lots of gaps in the text (I told you it was unfinished).

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Part II: Principles of Motion Control

This is an unfinished draft for a book I wrote back in 1999 on the topic of motion control. Over the next couple of days I will publish the next two parts, just as it was written and with lots of gaps in the text (I told you it was unfinished).

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Part I: Introduction to Motion Control

This is an unfinished draft for a book I wrote back in 1999 on the topic of motion control. Over the next couple of days I will publish the next three parts, just as it was written and with lots of gaps in the text (I told you it was unfinished).

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Moving Picture, Motion Control

This is an unfinished draft for a book I wrote back in 1999 on the topic of motion control. Over the next couple of days I will publish it in four parts, just as it was written and with lots of gaps in the text (I told you it was unfinished). Following is the original […]

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Verhoeff’s Dihedral Group D5 Check

I just finished implementing the Verhoeff checksum algorithm in PHP, you can download it as verhoeff.zip. Yes, mathematically it’s a bit more elaborate than other checksum algorithms, but with look-up tables it’s fairly simple and lightweight. The implementation provides two functions calcsum($number) and checksum($number). The first one return a check digit for the decimal number […]

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Wings 3d

I must say that Wings 3d are THE polygon and subdivision mesh modeler.

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DVD Author Primer

Traditionally, DVD authoring has been an expensive affair. Full- featured professional applications or hardware costs big sums of money, while low-budget products often come with severe limitations in features. However, it’s now possible to author professional DVDs on Linux thanks to a group of open-source packages. Even if they do not yet support all features of the DVD specification new features are being added with each release.

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DVD Author

I successfully authored my first DVD on Linux today, with the mjpegtool and dvdauthor suites of commandline tools. Not that my creation is very content rich, it’s just some menus and slideshows with audio. I’ve started to compile all infomation I have into a long and detailed note regarding how to use the various tools […]

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That Python Is Strangling Me!

I’ve given up on implementing Python classes using C API since I couldn’t get instancing in the C API to work properly. No helpfull error messages, either segfault or “wrong arguments in Objectsclassobjects.cpp line 504″, no helpfull documentation, and me to tired to even type gdb. I’m going back to write a simple module and […]

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And Now Something Completely Different …

I finally figured out how to implement classes in Python using C API — the right way. Namely as a new type using the PyTypeObject complete with get and set attribute calls and plain members. But I tought my previous hack for building a class at runtime is still slim enough to share, especially if […]

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