新背景：blockfall

parts/backgrounds/blockfall.lua

@@ -0,0 +1,55 @@
+--Block rain
+local gc=love.graphics
+local rnd=math.random
+local ins,rem=table.insert,table.remove
+local back={}
+
+local t
+local mino
+function back.init()
+	t=0
+	mino={}
+end
+function back.update()
+	t=t+1
+	if t%26==0 then
+		local r=rnd(7)
+		local B=BLOCKS[r][rnd(0,3)]
+		local k=(1+rnd()*2)*SCR.rad/1000
+		ins(mino,{
+			block=B,
+			texture=SKIN.curText[SETTING.skin[r]],
+			k=k,
+			x=(SCR.w)*rnd()-15*#B[1],
+			y=0,
+			vy=k*2,
+		})
+	end
+	for i=#mino,1,-1 do
+		local M=mino[i]
+		M.y=M.y+M.vy
+		if M.y-M.k*#M.block*30>SCR.h then rem(mino,i)end
+	end
+end
+function back.draw()
+	gc.clear(.15,.15,.15)
+	gc.push("transform")
+	gc.origin()
+	gc.setColor(1,1,1,.4)
+	for i=1,#mino do
+		local M=mino[i]
+		local b=M.block
+		for y=1,#b do
+			for x=1,#b[1]do
+				if b[y][x]then
+					gc.draw(M.texture,M.x+(x-1)*30*M.k,M.y-y*30*M.k,nil,M.k)
+				end
+			end
+		end
+	end
+	gc.pop()
+end
+function back.discard()
+	mino=nil
+end
+return back