52 lines
1023 B
Lua
52 lines
1023 B
Lua
-- Snow
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local gc=love.graphics
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local ellipse=gc.ellipse
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local rnd=math.random
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local max,min=math.max,math.min
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local ins,rem=table.insert,table.remove
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local back={}
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local t
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local snow
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function back.init()
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t=0
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snow={}
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end
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function back.update()
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t=t+1
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if t%(t%626>260 and 3 or 6)==0 then
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ins(snow,{
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x=SCR.w*rnd(),
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y=0,
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vy=1+rnd()*.6,
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vx=rnd()*2-.5,
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rx=2+rnd()*2,
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ry=2+rnd()*2,
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})
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end
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for i=#snow,1,-1 do
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local P=snow[i]
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P.y=P.y+P.vy
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if P.y>SCR.h then
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rem(snow,i)
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else
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P.x=P.x+P.vx
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P.vx=P.vx-.02+rnd()*.04
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P.rx=max(min(P.rx+rnd()-.5,4),2)
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P.ry=max(min(P.ry+rnd()-.5,5),3)
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end
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end
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end
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function back.draw()
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gc.clear(.08,.08,.084)
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gc.setColor(.7,.7,.7)
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for i=1,#snow do
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local P=snow[i]
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ellipse('fill',P.x,P.y,P.rx,P.ry)
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end
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end
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function back.discard()
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snow=nil
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end
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return back
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