// forked from ABA's DefeatMe // DefeatMe.as // Defeat black ships. // (To restart from stage 1, reload the page.) // <Operation> // Movement : Arrow or [WASD] keys. // Fire / Start : [Z], [X], [.] or [/] key. package { import flash.display.Sprite; [SWF(width="465", height="465", backgroundColor="0xdddddd", frameRate="30")] public class DefeatMe extends Sprite { public function DefeatMe() { main = this; initialize(); } } } import flash.display.*; import flash.geom.*; import flash.text.*; import flash.events.*; const SCREEN_WIDTH:int = 465, SCREEN_HEIGHT:int = 465; var main:Sprite, g:Graphics; var messageField:TextField = new TextField; var keys:Vector.<Boolean> = new Vector.<Boolean>(256); // Initialize UIs. function initialize():void { g = main.graphics; main.stage.addEventListener(KeyboardEvent.KEY_DOWN, function(e:KeyboardEvent):void { keys[e.keyCode] = true; } ); main.stage.addEventListener(KeyboardEvent.KEY_UP, function(e:KeyboardEvent):void { keys[e.keyCode] = false; } ); messageField = createTextField(SCREEN_WIDTH - 360, SCREEN_HEIGHT - 20, 360, 20, 0); main.addChild(messageField); goToNextStage(); ships[1].exists = false; startGameOver(); gameOverTicks = 1; main.addEventListener(Event.ENTER_FRAME, update); } // Update the game frame. function update(event:Event):void { g.clear(); g.lineStyle(5, 0, 0.8); var isStageOver:Boolean = true; for each (var s:Ship in ships) { s.update(); if (!s.isPlayer && s.exists) isStageOver = false; } for (var i:int = 0; i < shots.length; i++) if (!shots[i].update()) { shots.splice(i, 1); i--; } if (isInGame) { if (isStageOver) goToNextStage(); } else { if (gameOverTicks > 0) { gameOverTicks--; messageField.y = SCREEN_HEIGHT - 20 + gameOverTicks; } else if (isFirePressed()) { isInGame = true; resetStage(); } } } var firePressedFlag:Boolean; function isFirePressed():Boolean { if (keys[0x5a] || keys[0xbf] || keys[0x58] || keys[0xbe]) { if (!firePressedFlag) { firePressedFlag = true; return true; } } else { firePressedFlag = false; } return false; } // Ships. var ships:Vector.<Ship> = new Vector.<Ship>; class Ship { public var pos:Vector3D; public var isPlayer:Boolean; public var posRecord:Vector.<Vector3D>; public var fireRecord:Vector.<Boolean>; public var recordIndex:int = 0; public var exists:Boolean = true; public var speed:Number = 5, shotSpeed:Number = 10; public var fireWay:int = 1, fireWayAngle:Number = PI / 5; public function update():void { if (!exists) return; if (isPlayer) { updatePlayer(); return; } pos = posRecord[recordIndex]; if (fireRecord[recordIndex]) addShot(pos, shotSpeed, fireWay, fireWayAngle, false); recordIndex++; if (recordIndex >= fireRecord.length) recordIndex = 0; g.moveTo(pos.x, pos.y + 10); g.lineTo(pos.x - 7, pos.y - 4); g.lineTo(pos.x + 7, pos.y - 4); g.lineTo(pos.x, pos.y + 10); return; } public function updatePlayer():void { var vx:Number = 0, vy:Number = 0; if (keys[0x25] || keys[0x41]) vx = -1; if (keys[0x26] || keys[0x57]) vy = -1; if (keys[0x27] || keys[0x44]) vx = 1; if (keys[0x28] || keys[0x53]) vy = 1; var isFiring:Boolean = isFirePressed(); if (isFiring) addShot(pos, shotSpeed, fireWay, fireWayAngle, true); if (vx != 0 && vy != 0) { vx *= 0.7; vy *= 0.7; } pos.x += vx * speed; pos.y += vy * speed; if (pos.x < 10) pos.x = 10; else if (pos.x > SCREEN_WIDTH - 10) pos.x = SCREEN_WIDTH - 10; if (pos.y < 10) pos.y = 10; else if (pos.y > SCREEN_HEIGHT - 10) pos.y = SCREEN_HEIGHT - 10; g.moveTo(pos.x, pos.y - 10); g.lineTo(pos.x - 7, pos.y + 4); g.lineTo(pos.x + 7, pos.y + 4); g.lineTo(pos.x, pos.y - 10); var p:Vector3D = new Vector3D(pos.x, -(pos.y - SCREEN_HEIGHT * 0.5) + SCREEN_HEIGHT * 0.5); posRecord.push(p); fireRecord.push(isFiring); } public function checkHit(p:Vector3D):Boolean { if (!exists) return false; var isHit:Boolean = (Vector3D.distance(p, pos) < 15); if (isHit) { exists = false; if (isPlayer) startGameOver(); } return isHit; } } function goToNextStage():void { var s:Ship; if (ships.length > 0) { ships[ships.length - 1].isPlayer = false; } else { s = new Ship; var p:Vector3D = new Vector3D(SCREEN_WIDTH * 0.5, SCREEN_HEIGHT * 0.25); s.posRecord = new Vector.<Vector3D>; s.fireRecord = new Vector.<Boolean>; s.posRecord.push(p); s.fireRecord.push(false); ships.push(s); } var sn:int = ships.length; s = new Ship; s.pos = new Vector3D; if (sn % 3 == 0) s.shotSpeed += 3; if (sn % 5 == 0) s.shotSpeed += 2; if (sn % 3 == 2) s.fireWay += 2; if (sn % 4 == 0) s.fireWay++; if (sn % 5 == 4) s.fireWay++; if (sn % 2 == 0) s.fireWayAngle *= 0.7; if (sn % 4 == 2) s.fireWayAngle *= 0.8; if (sn % 4 == 3) s.speed *= 1.4; s.isPlayer = true; ships.push(s); resetStage(); } function resetStage():void { var sn:int = ships.length - 1; var s:Ship; for each (s in ships) { s.recordIndex = 0; s.exists = true; } shots = null; shots = new Vector.<Shot>; s = ships[ships.length - 1]; s.pos.x = SCREEN_WIDTH * 0.5; s.pos.y = SCREEN_WIDTH * 0.75; s.posRecord = null; s.posRecord = new Vector.<Vector3D>; s.fireRecord = null; s.fireRecord = new Vector.<Boolean>; for (var x:int = 0; x <= SCREEN_WIDTH; x += 15) { addShot(new Vector3D(x, 30), 5.0 / (sn + 1), 1, 0, false); } messageField.y = 0; messageField.text = "Stage " + sn; } // Shots. var shots:Vector.<Shot>; class Shot { public var pos:Vector3D = new Vector3D, vel:Vector3D = new Vector3D; public var isPlayersShot:Boolean; public function update():Boolean { pos.incrementBy(vel); g.moveTo(pos.x, pos.y - 10); g.lineTo(pos.x, pos.y + 10); if (isPlayersShot) { for each (var s:Ship in ships) if (!s.isPlayer) if (s.checkHit(pos)) return false; } else { ships[ships.length - 1].checkHit(pos); } return (pos.x >= 0 && pos.x < SCREEN_WIDTH && pos.y >= 0 && pos.y < SCREEN_HEIGHT); } } function addShot(p:Vector3D, shotSpeed:Number, fireWay:int, fireWayAngle:Number, isPlayer:Boolean):void { var s:Shot, a:Number = 0, ai:Number; if (fireWay > 1) { a = -fireWayAngle; ai = fireWayAngle * 2 / (fireWay - 1); } for (var i:int = 0; i < fireWay; i++) { s = new Shot; s.pos.x = p.x; s.pos.y = p.y; var sa:Number = a; if (isPlayer) sa = PI - a; s.vel.x = shotSpeed * sin(sa); s.vel.y = shotSpeed * cos(sa); s.isPlayersShot = isPlayer; shots.push(s); a += ai; } } // Handle the game lifecycle. var isInGame:Boolean, gameOverTicks:int; function startGameOver():void { isInGame = false; gameOverTicks = 20; messageField.text = "GAME OVER"; } // Utility functions and variables. var sin:Function = Math.sin, cos:Function = Math.cos, PI:Number = Math.PI; function createTextField(x:int, y:int, width:int, size:int, color:int):TextField { var fm:TextFormat = new TextFormat, fi:TextField = new TextField; fm.font = "_typewriter"; fm.bold = true; fm.size = size; fm.color = color; fm.align = TextFormatAlign.RIGHT; fi.defaultTextFormat = fm; fi.x = x; fi.y = y; fi.width = width; fi.selectable = false; return fi; }