Snow

Snow.lua

--# Main
-- Snow

function setup()
    displayMode(FULLSCREEN)
    instances={}
    currentIndex=0
    table.insert(instances,SnowMaker(0,1))
end


function draw()
    background(31, 68, 104, 255)
    strokeWidth(5)
    fill(255, 255, 255, 255)
    rect(0,0,WIDTH,50)
    sprite("Small World:Tree Cone",500,50)
    sprite("Small World:House White",550,50)
    for i,obj in ipairs(instances) do
        currentIndex = i
        obj:draw()
    end
end


--# SnowMaker
SnowMaker = class()

function SnowMaker:init(delay,amount)
    self.delay=delay
    self.counter=0
    self.amount=amount
end

function SnowMaker:draw()
    self.counter = self.counter + 1
    if self.counter > self.delay then
        self.counter = 0
        for i=1,self.amount do
            local x=math.random(0,WIDTH)
            local y=HEIGHT
            newSnow=SnowFlake(x,y)
            table.insert(instances,newSnow)
        end
    end
end

--# SnowFlake
SnowFlake = class()

function SnowFlake:init(x,y)
    self.x=x
    self.y=y
    self.yspeed=-math.random(5,6)
    self.size=math.random(4,5)
end

function SnowFlake:draw()
    self.y = self.y + self.yspeed
    self.x = self.x + math.random(-1,1) + Gravity.x*4
    if self.x<0 then
        self.x = self.x + WIDTH
    end
    if self.x>WIDTH then
        self.x = self.x - WIDTH
    end
    if self.y<0 then
        table.remove(instances,currentIndex)
    end
    noStroke()
    fill(255, 255, 255, 255)
    ellipse(self.x,self.y,self.size,self.size)
end