I had a look at the stats for what people look at on this site. I was amazed at the drop off rate from the popular ones to posts that have only ever had one view (probably me checking that it posted properly!).

After the front page and the tutorials, centroid of points on the surface of a sphere got the most hits by a long way, and it also has the most comments. I’m in the process of writing a summary of the comments and some example code to show the results, but in the mean time, here’s the graph.

If you zoom in on the elbow of that (cropping off home and tutorials at the top and anything below 100 views at the bottom) you get this.