sample-groupGore/data/particle/spark.lua

local Spark = {}

Spark.name = 'Spark'
Spark.code = 'spark'

Spark.activate = function(self)
  self.speed = love.math.random(200, 300)
  self.alpha = .6 + love.math.random() * .4
  self.length = love.math.random(4, 12)
  self.angle = 0
  self.depth = -8
  ctx.view:register(self)
end

Spark.update = function(self)
  self.alpha = self.alpha - 2 * tickRate
  if self.alpha <= 0 then return true end

  self.x = self.x + math.dx(self.speed * tickRate, self.angle)
  self.y = self.y + math.dy(self.speed * tickRate, self.angle)
end

Spark.draw = function(self)
  local function doDraw()
    love.graphics.setColor(255, 255, 200, self.alpha * 255)
    love.graphics.line(self.x, self.y, self.x + math.dx(self.length, self.angle), self.y + math.dy(self.length, self.angle))
  end

  doDraw()
  ctx.effects:get('bloom'):render(doDraw)
end

return Spark