重构模式环境的dropPiece和task事件为更强大的自定义和未来联网任意模式做准备

整理出所有模式的这两个事件独立到一个文件夹并整理所有模式引用它们的方式
警告：很可能有错误，需要他人帮助测试

parts/eventsets/master_n.lua

@@ -0,0 +1,67 @@
+local rush_lock={20,18,16,15,14, 14,13,12,11,11}
+local rush_wait={12,11,11,10,10, 10,10, 9, 9, 9}
+local rush_fall={18,16,14,13,12, 12,11,11,10,10}
+
+return{
+    dropPiece=function(P)
+        local D=P.modeData
+
+        local c=#P.clearedRow
+        if c==0 and D.pt%100==99 then return end
+        local s=c<3 and c+1 or c==3 and 5 or 7
+        if P.combo>7 then s=s+2
+        elseif P.combo>3 then s=s+1
+        end
+        D.pt=D.pt+s
+
+        if D.pt%100==99 then
+            SFX.play('blip_1')
+        elseif D.pt>=D.target then--Level up!
+            s=D.target/100
+            local E=P.gameEnv
+            E.lock=rush_lock[s]
+            E.wait=rush_wait[s]
+            E.fall=rush_fall[s]
+
+            if s==2 then
+                E.das=8
+                BG.set('rainbow')
+            elseif s==4 then
+                BG.set('rainbow2')
+            elseif s==5 then
+                if P.stat.frame>260*60 then
+                    D.pt=500
+                    P:win('finish')
+                    return
+                else
+                    P.gameEnv.freshLimit=10
+                    E.das=7
+                    BG.set('glow')
+                    BGM.play('secret8th remix')
+                end
+            elseif s==7 then
+                E.das=6
+                BG.set('lightning')
+            elseif s==9 then
+                E.bone=true
+            elseif s==10 then
+                D.pt=1000
+                P:win('finish')
+                return
+            end
+            D.target=D.target+100
+            P:_showText(text.stage:gsub("$1",s),0,-120,80,'fly')
+            SFX.play('reach')
+        end
+    end,
+    task=function(P)
+        P:set20G(true)
+        P.lockDelay=rush_lock[1]
+        P.gameEnv.lock=rush_lock[1]
+        P.gameEnv.wait=rush_wait[1]
+        P.gameEnv.fall=rush_fall[1]
+
+        P.modeData.pt=0
+        P.modeData.target=100
+    end,
+}