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界面上的Node节点： 背景 警戒线 三面墙 初始位置节点 水果容器

先分组吧，墙 地板 水果

创建预制体 先挂一个脚本 刚体碰撞器先弄上再说

import { _decorator, Component, Node } from 'cc';
const { ccclass, property } = _decorator;@ccclass('FruitData')
export class FruitData extends Component {//水果的Id 区分哪一种水果的fruitId: number = 0;//水果的碰撞次数 主要记录水果的状态用的contactNum: number = 0;//是否合成isSynthesis: boolean = false;
}

再建一个脚本，开始折腾走起

    @property({ type: Node, displayName: "水果生成的位置" })fruitStart: Node = null;//大小随便，位置合理就行，不行就大小[0,0]@property({ type: Node, displayName: "水果的父节点" })fruitRoot: Node = null;//水果容器@property({ type: [Prefab], displayName: "水果的预制体" })fruitPrefabs: Prefab[] = [];//一堆水果的预制体//存储临时节点，方便计算用currentFruit: Node = null;@property({ type: Node, displayName: "警告" })WarnningLine: Node = null;

开始游戏了

    start() {//创建一个随机水果，前两前三的this.createRadomFruit();//加上触摸监听 看api好像input比node监听使用范围广input.on(Input.EventType.TOUCH_START, this.onTouchStart, this);input.on(Input.EventType.TOUCH_END, this.onTouchEnd, this);}

创建水果了

    createRadomFruit() {const fruitId: number = Math.floor(Math.random() * 3);const fruitNode: Node = instantiate(this.fruitPrefabs[fruitId]);fruitNode.setPosition(this.fruitStart.position);//禁用刚体，用来监听移动事件后再开启fruitNode.getComponent(RigidBody2D).enabled = false;fruitNode.getComponent(RigidBody2D).gravityScale = 2;//赋值fruitNode.getComponent(FruitData).fruitId = fruitId;fruitNode.getComponent(FruitData).contactNum = 0;//监听碰撞const collider2D: Collider2D = fruitNode.getComponent(Collider2D);collider2D.on(Contact2DType.BEGIN_CONTACT, this.onBeginContact, this);fruitNode.setParent(this.fruitRoot);//用一个临时的Node来存储这个节点，方便操作this.currentFruit = fruitNode;}

两个监听

    //收到点击事件后，水果位置平移onTouchStart(event: EventTouch) {//放置连续点击if (!this.currentFruit) return;//可以看看这个https://blog.csdn.net/weixin_44053279/article/details/129568612//获取 UI 坐标系下的触点位置const touchPos = event.getUILocation();//记住 是父节点 可以搜一下坐标空间转换const parentPos = this.fruitRoot.getComponent(UITransform).convertToNodeSpaceAR(v3(touchPos.x, touchPos.y, 0));//这是个节点位置 position现在是个静态的 拿不到.xconst fruitPos = this.currentFruit.getPosition();fruitPos.x = parentPos.x;// 防止穿透，还是用tween动画吧// this.currentFruit.setPosition(fruitPos);tween(this.currentFruit).to(.3, { position: fruitPos }).start();}onTouchEnd(event: EventTouch) {//放置连续点击if (!this.currentFruit) return;this.currentFruit.getComponent(RigidBody2D).enabled = true;this.currentFruit = null;//延时一下 生成下一个this.scheduleOnce(this.createRadomFruit, 2);//用来检测是否超过预期位置没this.scheduleOnce(this.checkGameOver, 2);}

碰撞检测

    //3.8 .d.ts中没给监听的参数//https://forum.cocos.org/t/topic/158425onBeginContact(selfCollider: Collider2D, otherCollider: Collider2D, contact: IPhysics2DContact | null) {const selfFruitData = selfCollider.getComponent(FruitData);const otherFruitData = otherCollider.getComponent(FruitData);if (otherCollider.group === Math.pow(2, 1)) {selfCollider.getComponent(FruitData).contactNum += 1;otherCollider.getComponent(FruitData).contactNum += 1;}if (otherCollider.group === Math.pow(2, 3)) {selfCollider.getComponent(FruitData).contactNum += 1;}if (otherCollider.group !== Math.pow(2, 1)) return;//Id相同 未合成 否则也返回if (selfFruitData.fruitId !== otherFruitData.fruitId) return;if (selfFruitData.isSynthesis || otherFruitData.isSynthesis) return;selfFruitData.isSynthesis = true;otherFruitData.isSynthesis = true;//合成后的新水果const synthesisFruitId = selfFruitData.fruitId + 1;const synthesisFruitPos = selfCollider.node.position;//https://blog.csdn.net/loveyoulouyou/article/details/127583198this.scheduleOnce(() => {otherCollider.getComponent(RigidBody2D).enabled = false;selfCollider.getComponent(RigidBody2D).enabled = false;tween(otherCollider.node).to(.2, { position: synthesisFruitPos }).to(.2, { scale: new Vec3(1.2, 1.2, 1) }).parallel().call(() => {//碰撞后立即实例化会报错，给一个延时器，tween动画都可以this.createSynthesisFruit(synthesisFruitId, synthesisFruitPos);}).call(() => {selfCollider.node.destroy();otherCollider.node.destroy();}).start();}, 0.1);};

 合成的逻辑

createSynthesisFruit(synthesisFruitId: number, synthesisFruitPos: Vec3) {const SynthesisNode: Node = instantiate(this.fruitPrefabs[synthesisFruitId]);//刚体碰撞 回弹可能造成穿透效果synthesisFruitPos.y += 10;SynthesisNode.setPosition(synthesisFruitPos);SynthesisNode.getComponent(RigidBody2D).enabled = false;SynthesisNode.getComponent(FruitData).contactNum = 0;SynthesisNode.getComponent(RigidBody2D).gravityScale = 2;//赋值SynthesisNode.getComponent(FruitData).fruitId = synthesisFruitId;//监听碰撞SynthesisNode.getComponent(Collider2D).on(Contact2DType.BEGIN_CONTACT, this.onBeginContact, this);SynthesisNode.setParent(this.fruitRoot);this.scheduleOnce(() => {//立即改变刚体状态也会报错，给一个延时SynthesisNode.getComponent(RigidBody2D).enabled = true;SynthesisNode.getComponent(FruitData).contactNum += 1;if (synthesisFruitId === this.fruitPrefabs.length - 1) {// if (synthesisFruitId === 3) {console.log("=====================胜利了=====================");this.reStartGame();}}, .1);}

检测是否要结束游戏

    //遍历所有水果，比较高度checkGameOver() {const warnningLinePos = this.WarnningLine.getPosition();for (let i = 0; i < this.fruitRoot.children.length; i++) {const element = this.fruitRoot.children[i];//水果没下落呢if (element.getComponent(FruitData).contactNum === 0) continue;if (element.getPosition().y >= warnningLinePos.y - 300) {console.log("=====================游戏警告=====================");}if (element.getPosition().y >= warnningLinePos.y) {console.log("=====================游戏结束=====================");break;}}}

重新开始

    //重新开始reStartGame() {this.fruitRoot.removeAllChildren();this.createRadomFruit();}

就这样了，没写其它的逻辑，刚体有点乱，不要立即改变一些东西，总之就是要么用计时器，要么tween一下。