Welcome to Changhai Lu's Homepage

I know nothing except the fact of my ignorance.

- Socrates

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Changhai Lu's Homepage

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I was born in HangZhou - a tourist city in east China - and had my early educations there. I went to Shanghai for college study in 1991. After then, I entered the Physics Department of Columbia University and obtained a Ph.D degree in May 2000.


This is the 4.0 version of my homepage, it works with all major browsers that support CSS, JavaScript and UTF-8 character encoding.

Those who are curious about previous versions can take a look at some dynamic screenshots from version 1.0, 2.0 and 3.0. Among those old versions, 1.0 and 2.0 are IE oriented, you will need a version of IE (5.0+) to view some of the VBScript and page transition effects.


This website is written mainly in Chinese. If you know Chinese, there's no need to follow the roadmap here, you won't miss anything navigating through the main menu on the top. If you don't know Chinese or just want to collectively check out all the English or language neutral contents on this site, follow the links below.

  • A few photos I took during various trips can be found here (the titles and captions are all in Chinese, but the images themselves - as you know - are language neutral).
  • The research works I did at Columbia University are briefly described here. Read it on your own risk though, be prepared to fall to sleep ...
  • If you would like to see a more chronological description of a segment of my life, here is something to read. It is the non-technical (char* non-technical = "no formula";) part of a technical diary I wrote in 1997. Depending on your experience at the previous stop, feel free to skip this one.
  • Online Sudoku Solver is a little web tool I wrote for solving Sudoku.
  • Simple Arithmetic Web Quiz is a web page I wrote for kids (my 7 year old daughter in particular) to practice simple arithmetics. If you have kids in similar age, or - in the almost impossible senario - if you yourself are a kid, feel free to use it.
  • OpenGL Tutorial 1, 2, 3 and 4 are the first four articles in a tutorial series I plan to write. The reason I wrote my own tutorials is to overcome a problem I saw on existing textbooks/tutorials: examples (sample code) are often unnecessarily complicated. In many cases, ridiculously long examples are used to demonstrate trivially simple concepts. Such an over-complication is, in my opinion, not only distracting, but may drive beginners away from the tutorials (or even worse, from the whole subject).
  • Sometimes I spend part of my spare time writing little programs. EasyAddress is one such toy, it is a unicode-based address book program, easy and intuitive to use. EasyAddress stores data in XML format for interoperability and comes with an HTML export utility.
  • In the very rare case if you are a Tcl/Tk programmer, please check out another program I wrote: Tcl2Html. This is an HTML converter for Tcl/Tk, and is probably the only such utility in the world that comes with a graphical user interface (at least by the time I wrote it). You are also welcome to check out an article I wrote: Selected Topics in Tcl/Tk.
  • I have also done websites other than my own homepage, here is an example: a website designed for GlobalTalk LLC (internal links disabled).