Syco: Like Grey Alien said: "draw the lines with rect (1 pixel wide) as it's quicker"
Drawing a rectangle 1 pixel high (or wide) is faster than drawing a line, since the algorithm is much simpler -- it doesn't have to do any calculations for angles, but can just fill a straight chunk of memory with your color value.
Drawing a rectangle 1 pixel high (or wide) is faster than drawing a line, since the algorithm is much simpler -- it doesn't have to do any calculations for angles, but can just fill a straight chunk of memory with your color value.