parallax scrolling down with ActionScript 3.0

Question

i want create road parallax scrolling down with flash in as3, when i run the script, the parallax moving up. and this my code

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

public class kelas extends MovieClip{

this i create variable

    public var road:road1;
    public var road2:road1;
    public var roadContainer:MovieClip;
    public var roadBreadth:Number;
    public var car:Car;

    public function kelas(){

and this create car , road and container

        car = new Car();
        road = new road1();
        road2 = new road1();
        roadBreadth = 653.7;

        car.y = 10.0;
        car.x = 10;
        road.y = 10.0;
        road.x = 10;
        road2.y = road.y + roadBreadth;
        road2.x = road.x;

        //* add child object
        roadContainer = new MovieClip();
        roadContainer.addChild(road);
        roadContainer.addChild(road2);
        this.addChild(roadContainer);

        this.addEventListener(Event.ENTER_FRAME, onEnterFrame);

public function onEnterFrame(event:Event):void
    {

        car.y = car.y + 15;
        roadContainer.y = 10 - car.y + 10;

        if (road.y + roadBreadth + roadContainer.y < 0)
        {
            road.y = road.y + (2 * roadBreadth);
        }
        if (road2.y + roadBreadth + roadContainer.y < 0)
        {
            road2.y = road2.y + (2 * roadBreadth);
        }
    }
}

i want this backgroung moving down is not moving up, please help me

This line.. if (road.y + roadBreadth + roadContainer.y < 0) is most likely not doing what you think it is. Here it says if (10.0 + 653.7 + (-5) is smaller than ZERO) { then make road.y = 10 + (1307.4) }. What are you trying to achieve here exactly?? What object in your code is the background exactly? Is it road? or roadContainer? — VC.One
Read this link scroll down to "Logical Operators" section to understand how to check thing-A AND thing-B using && or also thing-A OR thing-B using || — VC.One

Iggy Iggy · Accepted Answer · 2014-10-18T00:27:04

Have a look at this sample, it's a pretty simple idea to wrap an object around. Make sure your multiplier is set to the amount of roads that you're wrapping.

if (road.y > 600) {
    road.y -= road.y * 2;
} else {
    road.y++;
}

parallax scrolling down with ActionScript 3.0

2 Answers