Forked from: taka_oza's flash on 2010-8-25 diff:149 Falling Sand With English Comments Abarrow forked:0favorite:2lines:156license : MIT License modified : 2010-08-28 03:39:13 Embed Tweet package { import com.bit101.components.*; import flash.display.*; import flash.events.*; import flash.geom.*; [SWF ( width = 465, height = 465, frameRate = 70 )]; public class Main extends Sprite { private var _CANVAS:BitmapData = new BitmapData ( stage.stageWidth , stage.stageHeight , false , 0 ) ; private var _ERA:PushButton ; private var _WAL:PushButton ; private var _SAN:PushButton ; private var _WAT:PushButton ; private var _CLICK:Boolean = false ; private var _COLOR:uint = 0x836034; private var _BX:int = 0 ; private var _BY:int = 0 ; public function Main():void { addChild ( new Bitmap ( _CANVAS ) ) ; _ERA = new PushButton ( this, 10 , 20, "ERA" ) ; _WAL = new PushButton ( this, 120 , 20, "WAL" ) ; _SAN = new PushButton ( this, 230 , 20, "SAN" ) ; _WAT = new PushButton ( this, 340 , 20, "WAT" ) ; _WAL.enabled = false ; _ERA.addEventListener ( MouseEvent.CLICK , function ():void { _COLOR = 0x000000 ; _ERA.enabled = false ; _WAL.enabled = true ; _SAN.enabled = true ; _WAT.enabled = true ; } ) ; _WAL.addEventListener ( MouseEvent.CLICK , function ():void { _COLOR = 0x836034 ; _ERA.enabled = true ; _WAL.enabled = false ; _SAN.enabled = true ; _WAT.enabled = true ; } ) ; _SAN.addEventListener ( MouseEvent.CLICK , function ():void { _COLOR = 0xF7E779 ; _ERA.enabled = true ; _WAL.enabled = true ; _SAN.enabled = false ; _WAT.enabled = true ; } ) ; _WAT.addEventListener ( MouseEvent.CLICK , function ():void { _COLOR = 0x80A2F0 ; _ERA.enabled = true ; _WAL.enabled = true ; _SAN.enabled = true ; _WAT.enabled = false ; } ) ; stage.addEventListener ( MouseEvent.MOUSE_DOWN , function ():void { _CLICK = true ; } ) ; stage.addEventListener ( MouseEvent.MOUSE_UP , function ():void { _CLICK = false; } ) ; addEventListener ( Event.ENTER_FRAME , RUN ) ; } public function RUN ( e:Event ):void { //locks the canvas enabling many changes _CANVAS.lock() ; //sand from the top for ( var I:int = 200 ; I < 250 ; ++ I ) { if ( Math.random() < .1 ) { _CANVAS.setPixel ( I , 60 , 0xF7E779 ) ; } } //draws if (_CLICK && 60 < mouseY && 60 < _BY ) { for(var hx=-3;hx<4;hx++){ for(var hy=-3;hy<4;hy++){ line(_BX+hx,_BY+hy,mouseX+hx,mouseY+hy,_COLOR); } } /*for ( var J:int = 0 ; J < 20 ; ++ J ) { var R:Number = J / 20 ; _CANVAS.fillRect ( new Rectangle ( _BX * R + mouseX * ( 1 - R ) , _BY * R + mouseY * ( 1 - R ) , 5 , 5 ) , _COLOR ) ; }*/ } _BX = mouseX ; _BY = mouseY ; //cycle through pixels from bottom left to top right for ( var X:int = 0 ; X < _CANVAS.width ; ++ X ) { for ( var Y:int = _CANVAS.height - 1 ; Y >= 0 ; -- Y ) { var C:uint = _CANVAS.getPixel ( X , Y ) ; //the pixel if ( C == 0 ) { //air //nothing happens continue ; }else if ( C == 0xF7E779 ) { //sand var T:uint ; var TX:int ; { T = _CANVAS.getPixel ( X , Y + 1 ) ;//pixel bellow if ( T == 0 ) { //there is air bellow us //fall down _CANVAS.setPixel ( X , Y , T ) ; _CANVAS.setPixel ( X , Y + 1 , C ) ; continue ; }else if ( T == 0x80A2F0 && Math.random() < .5 ) { //there is water bellow us //half of the time the water goes above the sand _CANVAS.setPixel ( X , Y , T ) ; _CANVAS.setPixel ( X , Y + 1 , C ) ; continue ; } } { TX = X + Math.floor ( Math.random() * 7 ) - 3 ; //tx=x + or - 1 to 3 T = _CANVAS.getPixel ( TX , Y ) ; //a pixel near the pixel aka a wall or no wall if ( T == 0 ) { //no wall lets go _CANVAS.setPixel ( X , Y , T ) ; _CANVAS.setPixel ( TX , Y , C ) ; continue ; }else if ( T == 0x80A2F0 && Math.random() < .8 ) { //water between us //lets switch spots _CANVAS.setPixel ( X , Y , T ) ; _CANVAS.setPixel ( TX , Y , C ) ; continue ; } } }else if ( C == 0x80A2F0 ) { //water { T = _CANVAS.getPixel ( X , Y + 1 ) ; //the pixel bellow us if ( T == 0 ) { //there is air bellow us //fall down _CANVAS.setPixel ( X , Y , T ) ; _CANVAS.setPixel ( X , Y + 1 , C ) ; continue ; } } { TX = X + Math.floor ( Math.random() * 7 ) - 3 ; //tx=x + or - 1 to 3 T = _CANVAS.getPixel ( TX , Y ) ; //a pixel near the pixel aka a wall or no wall if ( T == 0 ) { //no wall lets go _CANVAS.setPixel ( X , Y , T ) ; _CANVAS.setPixel ( TX , Y , C ) ; continue ; } } } } } //great we're done _CANVAS.unlock() ; } public function line ( x0:int, y0:int, x1:int, y1:int, color:uint ):void { var dx:int; var dy:int; var i:int; var xinc:int; var yinc:int; var cumul:int; var x:int; var y:int; x = x0; y = y0; dx = x1 - x0; dy = y1 - y0; xinc = ( dx > 0 ) ? 1 : -1; yinc = ( dy > 0 ) ? 1 : -1; dx = dx < 0 ? -dx : dx; dy = dy < 0 ? -dy : dy; _CANVAS.setPixel32(x,y,color); if ( dx > dy ) { cumul = dx >> 1; for ( i = 1 ; i <= dx ; ++i ) { x += xinc; cumul += dy; if (cumul >= dx) { cumul -= dx; y += yinc; } _CANVAS.setPixel32(x,y,color); } }else { cumul = dy >> 1; for ( i = 1 ; i <= dy ; ++i ) { y += yinc; cumul += dx; if ( cumul >= dy ) { cumul -= dy; x += xinc ; } _CANVAS.setPixel32(x,y,color); } } } } } Code Fullscreen Preview Fullscreen jat32 code setPixel enabled getPixel color setPixel32 mouseY MouseEvent.CLICK mouseX Math.floor unlock lock MouseEvent.MOUSE_UP addEventListener MouseEvent.MOUSE_DOWN width height stageWidth BitmapData Bitmap stageHeight