Question

我正在尝试创建一个屏幕保护程序，在内容中它有一个让我们称之为'主要的鱼'只是游来游去。我设法做了主要鱼只游泳的编码部分。现在我已经添加了较小的鱼跟随我能够做的主要鱼类，但是我怎样才能使小鱼留在主鱼后面，因为它不会与它或主鱼之后的其他鱼类发生碰撞。这就是我到目前为止所做的事情

这是鱼类（跟随的鱼类）

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

    public class Fish extends MovieClip
    {
        var speed:Number = 3;
        var target:Point;

        public function Fish()
        {
            // constructor code
            addEventListener(Event.ENTER_FRAME, update);
        }

        function update(e:Event)
        {
            //Point fish at main fish
            var dx = MovieClip(parent).mainfish01.x - x;
            var dy = MovieClip(parent).mainfish01.y - y;
            var angle = Math.atan2(dy,dx) / Math.PI * 180;
            rotation = angle;

            //Move in the direction the fish is facing
            x = x+Math.cos(rotation/180*Math.PI)*speed;
            y = y+Math.sin(rotation/180*Math.PI)*speed;

            //Calculate the distance to target
            var hyp = Math.sqrt((dx*dx)+(dy*dy));
        }
    }
}

Answer 1

设置最大距离，然后检查更新位置之前的距离

    function update(e:Event)
    {
        //Point fish at main fish
        var dx = MovieClip(parent).mainfish01.x - x;
        var dy = MovieClip(parent).mainfish01.y - y;
        var angle = Math.atan2(dy,dx) / Math.PI * 180;
        rotation = angle;


        //Calculate the distance to target
        var hyp = Math.sqrt((dx*dx)+(dy*dy));

        // calculate based on size
        var minDist = 10;
        if(hyp > minDist){
            //Move in the direction the fish is facing
            x = x+Math.cos(rotation/180*Math.PI)*speed;
            y = y+Math.sin(rotation/180*Math.PI)*speed;
        }
    }

AS3：避免碰撞

1 个答案: