Particle = Core.class(Sprite)
particlesArray = {'woodPiece.png','woodPiece2.png','woodPiece3.png'}

function Particle:init(x, y, pressed, parent, type)

local drop

if (type == "wood") then

--If we recive wood as a parameter for type, then we create a Wood particle.
local bitmap = math.random(1,3)
drop = bitmapHandler:getBitmap(particlesArray[bitmap])
local woodscale = math.random(1,8)/10
local rotation = math.random(0,360)
drop:setRotation(rotation)
drop:setScale(1+woodscale)

--If we recive water as a parameter for type, then we create a Water particle.
else if (type == "water") then
drop = bitmapHandler:getBitmap('waterDrop2.png')

--If we recive finish as a parameter for type, then we create an Star particle that indicates the finish.
else if (type =="finish") then
drop = bitmapHandler:getBitmap('particleSprite.png')
drop:setScale(0.5+(math.random(1,8)/10))
drop:setRotation(math.random(0,360))
local r=255
local g=math.random(220,255)/255
local b=math.random(0,140)/255
drop:setColorTransform(r,g,b)

--If we recieve erase as a parameter for type, then we create a particle for erasing the hole.
else if (type == "erase") then
drop = bitmapHandler:getBitmap('particleSprite.png')
drop:setScale(0.5+(math.random(1,8)/10))
drop:setRotation(math.random(0,360))
else if (type == "magic") then
drop = bitmapHandler:getBitmap('waterDrop.png')
local r=math.random(100,250)/255
local g=math.random(100,200)/255
local b=math.random(100,200)/255
drop:setColorTransform(r,g,b)
end
end
end
end
end

--We add the particle to the sprite.
self:addChild(drop)

--This is in order to make the particles appear in different places, so they don't look one over another.
local separationx = math.random(-15,15)
self:setX(x + separationx)
local separationy = math.random(-5,5)
self:setY(y + separationy)
------------
--We set the scale of the particle.
self.scale = math.random(8,10)/10
if (type == "wood") then
self:setScale(1+self.scale)
else
self:setScale(self.scale)
end
self.degree = math.random(1,359)
self.parent = parent
self.pressed = pressed
self.type = type

if (pressed == false) then
self.speed = math.random(150,300)
self.life = math.random(100,150)
else
self.speed = math.random(800,1000)
self.life = math.random(350,500)
end
self.xspeed = math.cos(self.degree)*self.speed
self.yspeed = math.sin(self.degree)*self.speed
self.xmax = math.abs(math.cos(self.degree)*self.life)
self.ymax = math.abs(math.sin(self.degree)*self.life)
self.totalx = 0
self.totaly = 0
if (self.pressed) then
self.size = 3 --The size of the drop when pressed
else
self.size = 10 -- The size of the drop when not pressed
end
if (self.type == "finish") then
self.size = 3
end
end

function Particle:update(ts)
if (self.type == "finish") then
ts = 1
end
if (self.type == "wood") then
ts = ts*3
end
local dx = (self.xspeed/60)*ts
local dy = (self.yspeed/60)*ts
self:setX(self:getX() + dx)
self:setY(self:getY() + dy)
self.totalx = self.totalx + math.abs(dx)
self.totaly = self.totaly + math.abs(dy)

---Doing a math formula to simulate the water from being from small to big to small again, depending it's life cycle.

if (self.xmax > self.ymax) then
actual = (self.totalx/self.xmax)*self.size
else
actual = (self.totaly/self.ymax)*self.size
end
local scaleChange = (-1*(1/45)*(math.pow(actual,2))) + ((10/45)*actual)

self:setScale(self.scale + (scaleChange*2))
if (self.type == "finish") then
self:setAlpha(1-scaleChange)
end
-----------------------------------------
end

--This function tells if the particle needs to be killed.
function Particle:deleteOld()
if (self.totalx > self.xmax and self.totaly > self.ymax) then
answer = true
else
answer = false
end
return answer
end