tanqiu/assets/scripts/test/Ball.ts

import { _decorator, Component, Node, RigidBody2D, Vec2, Collider2D, Contact2DType, IPhysics2DContact } from 'cc';
import { Block } from './Block';
const { ccclass, property } = _decorator;

@ccclass('Ball')
export class Ball extends Component {
    @property
    initialSpeed: number = 200;

    private _rigidBody: RigidBody2D = null;

    start() {
        // 获取刚体组件
        this._rigidBody = this.getComponent(RigidBody2D);
        
        // 延迟设置初始速度，确保物理世界已初始化
        this.scheduleOnce(() => {
            if (this._rigidBody) {
                // 设置初始随机方向
                const angle = Math.random() * Math.PI * 2;
                const directionX = Math.cos(angle);
                const directionY = Math.sin(angle);
                
                // 施加初始力
                this._rigidBody.linearVelocity = new Vec2(
                    directionX * this.initialSpeed,
                    directionY * this.initialSpeed
                );
            }
        }, 0.1);
        
        // 注册碰撞事件
        const collider = this.getComponent(Collider2D);
        if (collider) {
            collider.on(Contact2DType.BEGIN_CONTACT, this.onBeginContact, this);
        }
    }

    onBeginContact(selfCollider: Collider2D, otherCollider: Collider2D, contact: IPhysics2DContact) {
        // 检测是否与方块碰撞
        if (otherCollider.node.name === 'Block') {
            // 触发方块的武器发射
            const block = otherCollider.node.getComponent(Block);
            if (block) {
                block.fireBullet();
            }
        }
    }
}