Question

我仍在努力as3。我的敌人不会从右向左移动。另一方没问题。有人不知道我做错了吗？跟踪goleft是工作。

package  {
    import flash.display.MovieClip;
    import flash.events.Event;

    public class mcEnemy extends MovieClip {

        public var sDirection:String;

        private var nSpeed:Number; 

        public function mcEnemy() 
        {
            addEventListener(Event.ADDED_TO_STAGE, onAdd);
        }

        private function onAdd (e:Event): void 
        {
            removeEventListener(Event.ADDED_TO_STAGE, onAdd);
            init();
        }

        //radom enemy's worden gekozen
        private function init ():void
        {
            // 3 frames
            var nEnemies:Number = 3;
            // pick random number between 1 and number of enemies
            var nRandom:Number = randomNumber (1, nEnemies);
            // Setup our playhead of this enemy clip to a random number
            // Stop op frame 1,2 of 3
            this.gotoAndStop(nRandom);
            // Setup our enemys start position
            setupStartPosition();
        }

        private function setupStartPosition (): void
        {
            // pick a random speed for the enemy
            nSpeed = randomNumber (5,10); 
            // Pick random number for left or right, tussen 1 en 2, start position
            var nLeftOrRight:Number = randomNumber (1,2);
            // if our nLeftOrRight == 1 , enemy is on the left
            if (nLeftOrRight == 1)
            {
                // start enemy on the left side
                this.x =  - (this.width/2);
                sDirection = "R";
                //trace ("right");
            } else
            {
                // start enemy on the right side
                this.x = stage.stageWidth + (this.width/2);
                sDirection = "L";
                //trace("left");
            }
            // set a random hoogte for our enemy
            // set a 2 varibele for min and max hoogte
            var nMinAltitude: Number = stage.stageHeight/2;
            var nMaxAltitude: Number = 720 - (this.height/2);

            // Setup our enemies altitude to a random point between our min and max altitudes
            this.y = randomNumber (nMinAltitude, nMaxAltitude);

            // move our enemy
            startMoving ();
        }

        private function startMoving (): void
        {
            addEventListener(Event.ENTER_FRAME, enemyLoop)
        }

        private function enemyLoop (e:Event ): void
        {
            // test in what direction our enemy is moving
            // if our enemy is moving right
            if (sDirection == "R")
            {
                // move our enemy right
                this.x += nSpeed;
                //trace ("goright");
            } else
            {
                // move our enemy left
                this.x -= nSpeed;
                //trace ("goleft");
            }
        }

        // geeft random nummer tussen 0 en 1 en stuurt het terug
        function randomNumber (low:Number=0, high:Number=1) : Number
        {
            return Math.floor (Math.random() * (1+high-low)) + low;
        }

            public function destroyEnemy (): void
        {
            // remove enemys from the stage
            if (parent) {
            parent.removeChild(this);   
            }
            // remove any eventlisteners from enemy
            removeEventListener(Event.ENTER_FRAME, enemyLoop);
        }

    }

}

我希望有人可以帮助我。抱歉我的英语不好。

Answer 1

当它向左移动时会发生什么？是不是总是向右移动，或者它有时是正确的，有时根本不移动？

Answer 2

据我所知和所想，是＆＃34; var nLeftOrRight：Number = randomNumber（1,2）;＆＃34;创建一个介于1和2之间的随机数，带有分贝（例如1.2929291），然后你将它变成一个int，这使得1真的很高的可能性，以及2真的很低的几率...，如果这是case不要使randomNumber（1,2），但randomNumber（1,3），然后抓住可能的＆＃39; 3你需要制作一个if for 3，然后把它变成e 1或2 ......

关于随机数生成问题，我可能会错，但是如果我提供错误的信息，请原谅我

将敌人移到左边

2 个答案: