Изучаю AS3. Пытаюсь перевести игру Atary Asteroids из AS2 на AS3.
Вот класс Asteroids:
Код AS3:
package
{
import flash.display.Sprite;
import flash.events.Event;
import flash.utils.setTimeout;
/**
* ...
* @author Volodin Alexandr Sergeevich
*/
public class Asteroid extends Sprite
{
public static var THIS:Asteroid = null;
public var velX:Number = Math.random() * 6 - 3;
public var velY:Number = Math.random() * 6 - 3;
public var rotSpeed:Number = Math.random() * 3;
public var rotDir:Number = chooseDir();
public var frame:Number = 0;
public function Asteroid()
{
graphics.beginFill(0xabc098);
graphics.lineStyle(1);
graphics.moveTo(-50, -50);
graphics.lineTo(50, -50);
graphics.lineTo(50, 50);
graphics.lineTo(-50, 50);
graphics.lineTo(-50, -50);
graphics.endFill();
addEventListener(Event.ENTER_FRAME, onAstMove);
}
private function onAstMove(e:Event = null):void
{
this.x += this.velX;
this.y += this.velY;
if (this.x > Main.THIS.StageX + this.width) this.x = 0 - this.width;
if (this.y > Main.THIS.StageY + this.width) this.y = 0 - this.width;
if (this.x < 0 - this.width) this.x = Main.THIS.StageX + this.width;
if (this.y < 0 - this.width) this.y = Main.THIS.StageY + this.width;
this.rotation += this.rotDir * this.rotSpeed;
frame++;
if (frame % 10 == 0)
{
//Main.THIS.graphics.beginFill(0x00ffaa);
//Main.THIS.graphics.drawCircle(this.x, this.y, 3);
//Main.THIS.graphics.endFill();
}
if (this.hitTestPoint(Main.THIS.ship.x, Main.THIS.ship.y, true))
{
Main.THIS.isDead = true;
Main.THIS.shipDestroy();
}
}
private function chooseDir():Number
{
var rnd:Number = Math.random();
if (rnd > 0.5){return 1;} else return -1;
}
}
}
Вот класс Main:
Код AS3:
package
{
import flash.display.Sprite;
import flash.events.Event;
import flash.events.KeyboardEvent;
/**
* ...
* @author Volodin Alexandr Sergeevich
*/
public class Main extends Sprite
{
public static var THIS:Main = null;
public var rotate:Number = 0;
public var thrust:Number = 0;
public var StageX:Number = 800;
public var StageY:Number = 600;
public var frame:Number = 0;
public var isDead:Boolean = false;
public function Main()
{
if (stage) init();
else addEventListener(Event.ADDED_TO_STAGE, init);
}
public var ship:Ship = new Ship();
private var ast_sprite:Sprite = new Sprite();
private function init(e:Event = null):void
{
THIS = this;
removeEventListener(Event.ADDED_TO_STAGE, init);
// entry point
ship.x = StageX / 2;
ship.y = StageY / 2;
addChild(ship);
stage.addEventListener(KeyboardEvent.KEY_DOWN, shipControl);
stage.addEventListener(KeyboardEvent.KEY_UP, shipDecontrol);
ship.addEventListener(Event.ENTER_FRAME, onShipMove);
addChild(ast_sprite);
frame++;
for (var i:int = 0; i < 5; i++ )
{
var ast:Asteroid = new Asteroid();
addChild(ast);
}
}
private function shipDecontrol(e:KeyboardEvent):void
{
rotate = 0;
thrust = 0;
}
private function shipControl(e:KeyboardEvent):void
{
switch(e.keyCode)
{
case 37:
rotate = -1;
break;
case 38:
thrust = 0.3;
break;
case 39:
rotate = 1;
break;
case 40:
thrust = -0.3;
break;
}
}
private function onShipMove(e:Event = null):void
{
if (rotate) ship.rotation += rotate * 5;
if (Math.abs(thrust) > 0)
{
var rad:Number = ship.rotation * Math.PI / 180;
ship.thrustX = Math.cos(rad) * thrust;
ship.thrustY = Math.sin(rad) * thrust;
ship.velX += ship.thrustX;
ship.velY += ship.thrustY;
}
ship.x += ship.velX;
ship.y += ship.velY;
if (ship.x > StageX + ship.width) ship.x = 0 - ship.width;
if (ship.x < 0 - ship.width) ship.x = StageX + ship.width;
if (ship.y > StageY + ship.width) ship.y = 0 - ship.width;
if (ship.y < 0 - ship.width) ship.y = StageY + ship.width;
}
public function shipDestroy()
{
removeChild(ship);
}
}
}
Вот класс Ship:
Код AS3:
package
{
import flash.display.Sprite;
import flash.events.Event;
import flash.events.KeyboardEvent;
/**
* ...
* @author Volodin Alexandr Sergeevich
*/
public class Ship extends Sprite
{
//private var spr : Sprite = new Sprite();
public var velX : Number = 0;
public var velY : Number = 0;
public var thrustX : Number = 0;
public var thrustY : Number = 0;
public function Ship()
{
if (stage) init();
else addEventListener(Event.ADDED_TO_STAGE, onStageShip);
}
private function onStageShip(e:Event = null):void
{
/*spr.graphics.beginFill(0x00ff00);
spr.graphics.lineStyle(1);
spr.graphics.moveTo(-20,-20);
spr.graphics.lineTo(20, 0);
spr.graphics.lineTo(-20, 20);
spr.graphics.endFill();*/
graphics.beginFill(0x00ff00);
graphics.lineStyle(1);
graphics.moveTo(-20,-20);
graphics.lineTo(20, 0);
graphics.lineTo(-20, 20);
graphics.endFill();
//addChild(spr);
}
public function shipDead():void
{
removeChild(this);
}
}
}
При соприкосновении астероида и корабля возникает такая ошибка:
Цитата:
ArgumentError: Error #2025: The supplied DisplayObject must be a child of the caller.
at flash.display: isplayObjectContainer/removeChild()
at Main/shipDestroy()[Main.as:113]
at Asteroid/onAstMove()[Asteroid.as:58]
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Что не так?
04.11.2015, 01:19
Проблема с доступом к объекту при вызове removeChild
Линейный вид
