我正在尝试为我的敌人阶级创造一个视野。现在它会在向他们移动之前检查玩家是否在半径范围内，如果不在，它会随机移动。我想给它视野，这样敌人就不会总是朝着玩家旋转。
敌人等级
package
{
import flash.automation.ActionGenerator;
import flash.events.Event;
import flash.geom.Point;
public class Enemy extends GameObject
{
var isDead:Boolean = false;
var speed:Number = 3;
var originalValue:Number = 50;
var changeDirection:Number = originalValue;
var checkDirection:Number = 49;
var numberGen:Number;
//var startTime:int = getTimer();
//var $timer = getTimer();
//var myTimer:int = getTimer();
//var moveTimer:int = timer - $timer;
public function Enemy()
{
super();
target = target_mc;
}
override public function update():void
{
movement();
}
private function movement():void
{
if (changeDirection >= 0)
{
if (changeDirection > checkDirection)
{
numberGen = (Math.random() * 360) / 180 * Math.PI;
}
var velocity:Point = new Point();
var $list:Vector.<GameObject > = getType(Player);
var $currentDistance:Number = Number.MAX_VALUE;
for (var i:int = 0; i < $list.length; i++)
{
var currentPlayer:GameObject = $list[i];
if (MathUtil.isWithinRange(currentPlayer.width,currentPlayer.x,currentPlayer.y,width,x,y))
{
var $delta:Point = new Point ;
$delta.x = currentPlayer.x - x;
$delta.y = currentPlayer.y - y;
if ($currentDistance > $delta.length)
{
$currentDistance = $delta.length;
velocity = $delta;
velocity.normalize(speed);
}
}
}
if(velocity.length == 0)
{
velocity = Point.polar(2, numberGen);
}
changeDirection--;
if (changeDirection == 0)
{
changeDirection = originalValue;
}
}
velocity.x = Math.floor(velocity.x * 10) * .1;
velocity.y = Math.floor(velocity.y * 10) * .1;
moveBy([Wall, Door], velocity.x, velocity.y, collides_mc);
var $collides:GameObject = collision([Player]);
if ($collides != null)
{
destroy();
}
if ($collides == null)
{
$collides = collision([Player],this);
if ($collides != null)
{
$collides.destroy();
}
}
rotation = (Math.atan2(velocity.y, velocity.x) * 180 / Math.PI);
collides_mc.rotation = -rotation;
trace($collides);
}
override public function onCollideX($collision:GameObject):void
{
}
override public function onCollideY($collision:GameObject):void
{
}
}
}
GameObject 类，其中包含所有功能，并且 Enemy 对其进行了扩展
package
{
import flash.display.DisplayObject;
import flash.events.Event;
import flash.ui.Keyboard;
import flash.events.KeyboardEvent;
import flash.display.MovieClip;
import flash.display.Sprite;
import flash.sensors.Accelerometer;
import flashx.textLayout.elements.ListElement;
public class GameObject extends MovieClip
{
static public var list:Vector.<GameObject> = new Vector.<GameObject>;
protected var hitBox:Sprite;
public var target:MovieClip;
public function GameObject()
{
target=this;
list.push(this);
}
public function update():void
{
}
public function collision(typesColliding:Array, $target:DisplayObject = null):GameObject
{
if($target == null)
$target = target;
for (var i:int = list.length - 1; i >= 0; i--)
{
var item:GameObject = list[i], found:Boolean = false;
for (var f:int = typesColliding.length - 1; f >= 0; f--)
{
if (item is typesColliding[f])
{
found = true;
break;
}
}
if (found && $target.hitTestObject(item.target) && this != item)
{
return item;
}
}
return null;
}
public function moveBy(typesColliding:Array, $x:Number = 0, $y:Number = 0, $target:DisplayObject = null):void
{
var $collision:GameObject;
x += $x;
if (($collision = collision(typesColliding, $target)) != null)
{
x -= $x;
onCollideX($collision);
}
y += $y;
if (($collision = collision(typesColliding, $target)) != null)
{
y -= $y;
onCollideY($collision);
}
}
public function onCollideX($collision:GameObject):void
{
}
public function onCollideY($collision:GameObject):void
{
}
public function getType($class:Class):Vector.<GameObject>
{
var $list:Vector.<GameObject> = new Vector.<GameObject>;
for (var i:int = 0; i < list.length; i++)
{
if (list[i] is $class)
{
$list.push(list[i]);
}
}
return $list;
}
public function destroy():void
{
var indexOf:int = list.indexOf(this);
if (indexOf > -1)
list.splice(indexOf, 1);
if (parent)
parent.removeChild(this);
trace("removing item: "+this+" list: " + list.length + ": " + list);
}
}
}
任何帮助将不胜感激，谢谢。