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Viewing changes to enemy.lua

  • Committer: Josh C
  • Date: 2013-05-13 20:41:14 UTC
  • Revision ID: josh@9ix.org-20130513204114-wtg735gs4b38wad4
extract wrapping behavior, wrap bullets

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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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}
 
 
b'\\ No newline at end of file'