Cheers plinkie/bad Mario.
But why does that piece of code work. What and how is it doing exactly?
Sorry to be a laymen. Also why is not player.x, player .y? Why player.x, player.x?
thats simple, because the distance measured there is for horizontal distance
you can simply put distance(x1,0,x2,0) as well and would work the same, you can also put distance(x1,y1,x2,y2) but that would mean distance would count the difference of pixels from Y1 to Y2 also, so locking the Y1,Y2 to player.x does the same type of job as saying 0 or 1 or 2 or 100 to 100 which is 0., and only distance that is measured is the enemy.x, player.x the other variables don't count.
distance(x1,y1,x2,y2) calculates the distance of position X1 to X2 and Y1 to Y2 if you lock any of those and say distance(x1,0,x2,0) then you would only get the distance from x1 to x2 if you lock the x1 and x2 then it will use the other variables.
hope it makes sense.