I recently posted a path finding demo that uses a breadth-first algorithm to route a sprite around a map. Kamilche has taken the basic idea and created a new demo with many improvements. Fugu has been replaced with an animated turtle that uses the A* algorithm to do the path finding. A* (pronounced "A star") generally performs better than breadth-first search because it directs the search towards the target, rather than have it expand evenly.

Kamilche is the author of Incarnation, an impressive RPG written in Python & PyGame. I highly recommend checking it out!

So you are writing a game in PyGame and you come up with the most beautiful particle effect. But when you implement it, you find that the particles seem to jitter between pixels, and it spoils the effect. This is because PyGame can only render sprites at integer coordinates, even if you give it float values. OpenGL or other 3D APIs don't suffer from this because they can apply filtering and effectively render images between pixels (or sub-pixel). But you can't do that with a 2D blitter.

Until now that is! :-) I've written a small module that pre-calculates sub-pixel sprites so that you can render a PyGame surface at fractional coordinates. It's nice and easy to use, and is almost a drop in replacement. Here's an example: continue reading…

I have written a demonstration of a simple path-finding algorithm (in Python), for use in grid-based computer games. It used a breadth-first search to route a sprite from one part of a map to another, avoiding obstacles in between. The code is a listing taken from my forthcoming book, Beginning Game Development with Python and Pygame

To run it, you will need PyGame, and of course Python. The code is completely public domain, use it for whatever purpose you want and you don't owe me a penny. Here be a screenshot...

My sister sent me this (hi Jen), it is a lesson in not taking computers literally. According to Google, if you want to go from New York to Edinburgh you must swim across the Atlantic ocean. Nice going egg-heads!

It must have been a slow news day in Chester yesterday. Front page on the Chester Chronicle is an article about a painting of Adam and Even hanging in the Cathedral. Apparently some locals were grossly offended at the sight of Eve's buttocks and breast. I'm tempted to get all militant atheist here, but I know its just a handful of stuffy prudes. Personally I think Eve looks quite good, and no cellulite in sight! Judge for yourself...