Where there is a Will

I pride myself in my ability to make decisions. If I have all the variables and criteria then I can typically select the best course of action, or at least a good choice of action. As an engineer, this is invaluable because most problems in software development are of this type; you have all the facts and a desired outcome. If you meet the desired outcome, then you can safely say that you made the right decision. If not you can go back and try again. continue reading…

Just uploaded a new version of Postmarkup (1.0.5), my bbcode parsing engine. The only significant change was a fix to a potential thread safety issue. It would only have occurred if you used the [list] tag, and even then only rarely (if at all). I figured it would be worthwhile since many people are using it in the context of a multi-threaded web application.

I decided not to bother with a win32 installer since its only a single Python file, and can be installed with easy_install. Use the following command line to install, or upgrade, Postmarkup.

If anyone really wants a win32 installer then let me know, I'll probably oblige.

See the Postmarkup homepage on Google Code for more information.

What do you mean its not the new year? Yesterday was 32 AW, today is 33 AW. That's After Will. Which also makes it my birthday. continue reading…

After my previous post regarding the the is_power_of_2 and next_power_of_2 functions, Richard Jones pointed out that Pyglet has an implementation that used the bit-twiddling method. Since I had something to do a direct comparison with, I wrote a script to test the run time of the two methods.

This produced the following results on my humble PC.

The results are conclusive - bit-twiddling is still a big win in Python. I figured that the bit-twiddling is_power_of_2 function would be faster than the float math version, but I was surprised by the next_power_of_2 result. It pays to profile!

I also tested it with Psyco, and got the following results. continue reading…

Added a few functions to gameobjects.util that seemed worth sharing. The first two are two-dimensional versions of range and xrange. When iterating over something 2 dimensional (such as pixels in an image) you typically have an outer loop for the y coordinate, and an inner loop for the x coordinate. The range2d and xrange2d functions combine these two loops in to one and take range iterables as parameters.

Here's how you might use range2d to iterate over the coordinates in an image.

The xrange2d function returns a generator rather than a list, but works the same. continue reading…

I've moved Game Objects to Google Code. It's new home is http://code.google.com/p/gameobjects/. There are source and Win32 packages available.

Game Objects is intended to be a collection of classes to assist with the creation of games, or other realtime applications. Currently there is a 2D and 3D Vector class, and a well optimized 4x4 Matrix class, but eventually Game Objects will contain code for general route finding, entity management, AI and other cool stuff. I'm happy to take suggestions, and if you would like to submit code - even better! All classes should following these commandments.