Snow Falling

 

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this is a chinese-version,if anyone cannot understand it or have other trouble,just tell in Forum, I will help.

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property SnowList,OldPic,MyImage,MySnowType,MySnow,MySpeed,SnowCount,SnowWidth,SnowHeight,SnowColor,UseCustomSnow,MySnowMember property BlendSnow,tblend on getBehaviorDescription   tt="雪花飘落"   tt=tt&return&return&"本行为适用于bitmap精灵"   tt=tt&return&       "注意事项:"   tt=tt&return&       "    当选用默认雪花时，默认雪花颜色不要设成纯白!"   tt=tt&return&return&"    本行为你可以直接使用或修改源代码，如需转载或刊登、演示教学请著名版权作者！必要时请联系作者！"   tt=tt&return&return&"          版权所有：   Sbljx"   return tt end getBehaviorDescription ------------ on beginSprite me   OldPic=sprite(the currentspritenum).member.image.duplicate()   MyImage=sprite(the currentspritenum).member.image   MySnow=image(SnowWidth, SnowHeight, 16)   case MySnowType of     "矩形":MySnow.fill(MySnow.rect, [#shapeType: #rect, #lineSize: 0, #color: SnowColor])     "圆形":MySnow.fill(MySnow.rect, [#shapeType: #oval, #lineSize: 0, #color: SnowColor])     end case   if UseCustomSnow then MySnow=MySnowMember.image     case BlendSnow of       "渐显":tblend=0       "渐隐":tblend=255       "显隐显":tblend=255             "隐显隐":tblend=0       "总显":tblend=255     end case   tr=rect(0,0,MySnow.width,MySnow.height)   SnowList=[[#CurRect:tr,#NextRect:tr,#Pic:MySnow,#HChange:1,#CurrentBlend:255]]   SnowList=[]   repeat with i=1 to SnowCount     tth=random(MyImage.width)     ttv=random(MyImage.height)-MyImage.height     SnowList.add([#CurRect:tr+rect(tth,ttv,tth,ttv),#NextRect:tr+rect(tth,ttv,tth,ttv),#Pic:MySnow,#HChange:1,#CurrentBlend:tblend])   end repeat   -- end on exitFrame me   FallSnow end on endSprite me   sprite(the currentspritenum).member.image=OldPic end ------ on FallSnow   repeat with i=1 to SnowList.count     if random(20)=1 then SnowList[i].HChange=-SnowList[i].HChange     tspeed=MySpeed     SnowList[i].CurRect=SnowList[i].NextRect     if SnowList[i].CurRect[2]>MyImage.rect[4] then       tr=rect(0,0,MySnow.width,MySnow.height)       tth=random(MyImage.width)       ttv=0       SnowList[i].NextRect=tr+rect(tth,ttv,tth,ttv)       SnowList[i].CurrentBlend=tblend     else       SnowList[i].NextRect=SnowList[i].NextRect+rect(SnowList[i].HChange,tspeed,SnowList[i].HChange,tspeed)            end if     case BlendSnow of       "渐显":         if SnowList[i].CurRect[4]>0 and SnowList[i].CurRect[4]          -- SnowList[i].CurrentBlend=255*(MyImage.height-SnowList[i].CurRect[4])/(MyImage.height*1.00)           SnowList[i].CurrentBlend=255*(SnowList[i].CurRect[4])/(MyImage.height*1.00)         end if       "渐隐":         if SnowList[i].CurRect[4]>0 and SnowList[i].CurRect[4]          SnowList[i].CurrentBlend=255*(MyImage.height-SnowList[i].CurRect[4])/(MyImage.height*1.00)         end if       "显隐显":         if SnowList[i].CurRect[4]>0 and SnowList[i].CurRect[4]          SnowList[i].CurrentBlend=abs(255*(MyImage.height/2.00-SnowList[i].CurRect[4])/(MyImage.height*0.50))         end if               "隐显隐":         if SnowList[i].CurRect[4]>0 and SnowList[i].CurRect[4]          SnowList[i].CurrentBlend=255-abs(255*(MyImage.height/2.00-SnowList[i].CurRect[4])/(MyImage.height*0.50))         end if         "总显":         SnowList[i].CurrentBlend=255     end case     MyImage.copyPixels(OldPic,SnowList[i].CurRect,SnowList[i].CurRect)     MyImage.copyPixels(SnowList[i].Pic,SnowList[i].NextRect, SnowList[i].Pic.rect,[#ink:36,#blendLevel: SnowList[i].CurrentBlend])     end repeat end ------- on getPropertyDescriptionList   vPDList = [:]   setaProp vPDList, #UseCustomSnow, [#comment: "自定义雪花",     #format:#boolean, #default:false]   setaProp vPDList, #MySnowMember, [#comment: "自定义雪花演员",     #format:#Bitmap, #default:member(1)]   setaProp vPDList, #MySnowType, [#comment: "默认雪花图案",     #format:#string, #default:"圆形",#range: ["矩形","圆形"]]   setaProp vPDList, #SnowWidth, [#comment: "默认雪花宽度",     #format:#integer, #default:2,#range: [#min:2, #max:10]]     setaProp vPDList, #SnowHeight, [#comment: "默认雪花高度",     #format:#integer, #default:2,#range: [#min:2, #max:10]]   setaProp vPDList, #SnowColor, [#comment: "默认雪花颜色",     #format:#color,#default:rgb(247,247,247)  ]   setaProp vPDList, #MySpeed, [#comment: "向下飘落速度",     #format: #float, #default:2, #range: [#min:0, #max:25]]   setaProp vPDList, #SnowCount, [#comment: "雪花数目",   #format: #integer, #default:30, #range: [#min:1, #max: 100]]   setaProp vPDList, #BlendSnow, [#comment: "默认雪花图案",     #format:#string, #default:"总显",#range: ["总显","渐显","渐隐","隐显隐","显隐显"]]   return vPDList end getPropertyDescriptionList on isOKToAttach (me, aSpriteType, aSpriteNum)   case aSpriteType of     #graphic:       return getpos([#bitmap], sprite(aSpriteNum).member.type) <> 0     #script:       return FALSE   end case end isOKToAttach