[Ёлочка]

Вот так можно:

import flash.display.MovieClip;
import flash.events.KeyboardEvent;
import flash.ui.Keyboard;
import flash.events.Event;
 
var ship:MovieClip;
var rotation_speed:Number = 0;
var motion_speed:Number = 0;
var motion_switch:int = 0;
var rotation_switch:int = 0;
 
const MAX_ROTATION_SPEED:Number = 3;
const MAX_MOTION_SPEED:Number = 5;
const ROTATION_ACCELERATION:Number = 0.2;
const MOTION_ACCELERATION:Number = 0.3;
const RESISTANCE:Number = 0.98;
 
 
stage.addEventListener(KeyboardEvent.KEY_DOWN, keyDownUpHandler);
stage.addEventListener(KeyboardEvent.KEY_UP, keyDownUpHandler);
stage.addEventListener(Event.ENTER_FRAME, update);
 
function update(e:Event):void
{
	rotateShip();
	moveShip();
	frameLimits();
}
 
function keyDownUpHandler(e:KeyboardEvent):void
{
	switch (e.keyCode)
	{
		case Keyboard.UP:
			if ( e.type == KeyboardEvent.KEY_DOWN )
				motion_switch = 1;
			else
				motion_switch = 0;
			break;
 
		case Keyboard.DOWN:
			if ( e.type == KeyboardEvent.KEY_DOWN )
				motion_switch = -1;
			else
				motion_switch = 0;
			break;
 
		case Keyboard.LEFT:
			if ( e.type == KeyboardEvent.KEY_DOWN )
				rotation_switch = -1;
			else
				rotation_switch = 0;
			break;
 
		case Keyboard.RIGHT:
			if ( e.type == KeyboardEvent.KEY_DOWN )
				rotation_switch = 1;
			else
				rotation_switch = 0;
			break;
	}
}
 
function rotateShip():void
{
	rotation_speed += rotation_switch * ROTATION_ACCELERATION;
	if ( Math.abs( rotation_speed ) > MAX_ROTATION_SPEED )
		rotation_speed = MAX_ROTATION_SPEED * rotation_switch;
	ship.rotation += rotation_speed;
	rotation_speed *= RESISTANCE;
}
 
function moveShip():void
{
	motion_speed += motion_switch * MOTION_ACCELERATION;
	if ( Math.abs( motion_speed ) > MAX_MOTION_SPEED )
		motion_speed = MAX_MOTION_SPEED * motion_switch;
	ship.x -= Math.sin( ship.rotation * Math.PI / 180 ) * motion_speed;
	ship.y += Math.cos( ship.rotation * Math.PI / 180 ) * motion_speed;
	motion_speed *= RESISTANCE;
}
 
function frameLimits():void
{
	if ( ship.x > stage.stageWidth )
		ship.x = 0;
	else if ( ship.x < 0 )
		ship.x = stage.stageWidth;
 
	if ( ship.y > stage.stageHeight )
		ship.y = 0;
	else if ( ship.y < 0 )
		ship.y = stage.stageHeight;
}

ship.swf   (1.7 Кб)