82 lines
1.8 KiB
Lua
82 lines
1.8 KiB
Lua
--Flying cubes
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local gc=love.graphics
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local gc_clear=gc.clear
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local gc_setColor,gc_setLineWidth=gc.setColor,gc.setLineWidth
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local gc_rectangle=gc.rectangle
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local rnd=math.random
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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 squares
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function back.init()
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t=26
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squares={}
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end
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function back.update(dt)
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t=t-1
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if t==0 then
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local size=SCR.rad*(2+rnd()*3)/100
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local S={
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x=(SCR.w-size)*rnd(),
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y=(SCR.h-size)*rnd(),
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vx=0,vy=0,
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size=size,
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color=COLOR.random_dark(),
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}
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local speed=SCR.rad*(1+rnd()*2)/6
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if rnd()<.5 then
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S.vy=26*(.5-rnd())
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S.vx=speed
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if rnd()<.5 then
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S.x=-S.size
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else
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S.x=SCR.w
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S.vx=-S.vx
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end
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else
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S.vx=26*(.5-rnd())
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S.vy=speed
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if rnd()<.5 then
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S.y=-S.size
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else
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S.y=SCR.h
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S.vy=-S.vy
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end
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end
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ins(squares,S)
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t=rnd(6,16)
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end
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for i=#squares,1,-1 do
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local S=squares[i]
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if
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S.vx>0 and S.x>SCR.w or
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S.vx<0 and S.x+S.size<0 or
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S.vy>0 and S.y>SCR.h or
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S.vy<0 and S.y+S.size<0
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then
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rem(squares,i)
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else
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S.x=S.x+S.vx*dt
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S.y=S.y+S.vy*dt
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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(.1,.1,.1)
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gc_setLineWidth(6)
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for i=1,#squares do
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local S=squares[i]
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local c=S.color
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gc_setColor(c[1],c[2],c[3],.2)
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gc_rectangle('line',S.x,S.y,S.size,S.size)
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gc_setColor(c[1],c[2],c[3],.3)
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gc_rectangle('fill',S.x+3,S.y+3,S.size-6,S.size-6)
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end
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end
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function back.discard()
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squares=nil
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end
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return back
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