/traderous

local accelLimit = 300 * 2 -- same as the player, yes?

local velLimit = 600 -- same as player

Enemy = Tile:extend {

   image = 'data/enemy.png',

   maxVelocity = {x=velLimit,y=velLimit},

   minVelocity = {x=-velLimit, y=-velLimit},

   onUpdate = function(self)

                 -- find where player is relative to us

                 local dx = the.player.x - self.x

                 local dy = the.player.y - self.y

                 local ax, ay = dx, dy

                 if math.abs(dx) > math.abs(accelLimit) then

                    ax = accelLimit * util.signOf(dx)

                    ay = accelLimit * math.abs(dx) / dy

                 elseif math.abs(dy) > math.abs(accelLimit) then

                    ay = accelLimit * util.signOf(dy)

                    ax = accelLimit * math.abs(dy) / dx

                 end

                 self.acceleration.x = ax

                 self.acceleration.y = ay

                 self.rotation = math.atan2(self.velocity.y, self.velocity.x)

              end

}