Deadeye is... dead on. It was a quick plugin to draw lines. Intersecting lines with pixel-perfect masks in our current collision engine would be kind of tricky and take a while to code - and it's a bit of a corner case anyway. The accepted way to do lines before the Line object was a wide, narrow sprite with the hotspot at the middle left. Then you set its position to the start of the line, set its width to distance(startx, starty, endx, endy), and set its angle to angle(startx, starty, endx, endy). Bingo, sprite line with collisions.