"For one of my projects I wanted to calculate the areas that are visible from the player. In a 2d top-down game or an isometric game you can calculate visibility and lighting in 2 dimensions and store it in a bitmap. As usual I got distracted by writing about the algorithm. I've spent too much time on writing it up so I'm going to publish it even though I'm not quite happy with the explanation." - Amit Patel from Bookmarklet

(Weird — FF lost the image from the bookmarklet! :( ) - Amit Patel