playPlane/assets/script/moving-scene-bg.ts

import { _decorator, Component, Node } from 'cc';
const { ccclass, property } = _decorator;

@ccclass('game_manger')
export class game_manger extends Component {
    @property(Node)
    bg01: Node = null;

    @property(Node)
    bg02: Node = null;

    // 移动速度
    private _bgSpeed = 10;
    // 偏移量
    private _bgMovingRange = 50;

    onLoad() {

    }
    start() {
        this._init()
    }

    update(deltaTime: number) {
        this._moveBackground(deltaTime)
    }


    private _init() {
        this.bg01.setPosition(0, 0, 0);
        this.bg02.setPosition(-this._bgMovingRange, 0, 0);
    }

    private _moveBackground(deltaTime: number) {
        this.bg01.setPosition(this.bg01.position.x + this._bgSpeed * deltaTime, 0, 0)
        this.bg02.setPosition(this.bg02.position.x + this._bgSpeed * deltaTime, 0, 0)
        if (this.bg01.position.x > this._bgMovingRange) {
            this.bg01.setPosition(this.bg02.position.x - this._bgMovingRange, 0, 0)
        } else if (this.bg02.position.x > this._bgMovingRange) {
            this.bg02.setPosition(this.bg01.position.x - this._bgMovingRange, 0, 0)
        }
    }
}