/traderous

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Viewing changes to enemy.lua

  • Committer: Josh C
  • Date: 2013-05-04 22:53:27 UTC
  • Revision ID: josh@9ix.org-20130504225327-dsc1gi3ri96h50s2
trying some movement styles.  derivatives on crystal quest movement.

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enemy.lua
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local accelLimit = 300 * 2 -- same as the player, yes?
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local velLimit = 600 -- same as player
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Enemy = Tile:extend {
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   image = 'data/enemy.png',
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   maxVelocity = {x=velLimit,y=velLimit},
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   minVelocity = {x=-velLimit, y=-velLimit},
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   onUpdate = function(self)
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                 -- find where player is relative to us
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                 local dx = the.player.x - self.x
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                 local dy = the.player.y - self.y
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                 local ax, ay = dx, dy
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                 if math.abs(dx) > math.abs(accelLimit) then
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                    ax = accelLimit * util.signOf(dx)
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                    ay = accelLimit * math.abs(dx) / dy
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                 elseif math.abs(dy) > math.abs(accelLimit) then
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                    ay = accelLimit * util.signOf(dy)
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                    ax = accelLimit * math.abs(dy) / dx
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                 end
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                 self.acceleration.x = ax
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                 self.acceleration.y = ay
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                 self.rotation = math.atan2(self.velocity.y, self.velocity.x)
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              end
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}
 
 
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