Mothback/data/scripts/entities/fairy.lua

Fairy = Entity:New(x,y)

 function Fairy:New(x,y)
 	local o = Entity:New(x,y)

 	o.pos = {x = x, y = y}
  o.speed = 0.23
  o.range = 20
  o.target = {x = x, y = y}

  -- animations
  o.body = Animation:New(animation.fairy.flying)
  o:centerOffset(o.body)
  o:getBoundingBox(o.body)


  o.lightRange = 55
	o.light = CreateLight(o.pos.x,o.pos.y,o.lightRange)

 	setmetatable(o, self)
 	self.__index = self

 	return o
 end

function Fairy:Smart()
  self.light.pos.x = self.pos.x-self.target_offset.x
  self.light.pos.y = self.pos.y-self.target_offset.y

  self.target.x = main_Player.pos.x - main_Player.target_offset.x
  self.target.y = main_Player.pos.y - main_Player.target_offset.y - 10
  local distance_x = self.target.x - self.pos.x
  local distance_y = self.target.y - self.pos.y
  local distance = math.sqrt(distance_x ^ 2 + distance_y ^ 2)
  local angle = GetAngleFromVector(distance_x,distance_y)
  if distance < self.range then
    self.vel.x = 0
    self.vel.y = 0
  else
    self.vel.x = math.cos(angle)*self.speed*distance/(8*game.scale)
    self.vel.y = math.sin(angle)*self.speed*distance/(8*game.scale)
  end
end

function Fairy:HandleAnimation()
  self.body:Animate()
  --if self:isCollidingWith(main_Player) then self.sprite_tint = {1,0,0} else self.sprite_tint = {1,1,1} end
  self:Draw(self.body)
end

function Fairy:DoPhysics()

  local random_x = math.random(-4, 4)/100
  local random_y = math.random(-4, 4)/100
  self.vel.x = self.vel.x + random_x
  self.vel.y = self.vel.y + random_y
  -- move
  if not self:isCollidingAt(self.pos.x + self.vel.x, self.pos.y, objects.collisions) then
    self.pos.x = self.pos.x + self.vel.x
  end
  if not self:isCollidingAt(self.pos.x, self.pos.y + self.vel.y, objects.collisions) then
    self.pos.y = self.pos.y + self.vel.y
  end
end