294 lines
9.7 KiB
TypeScript
294 lines
9.7 KiB
TypeScript
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import { _decorator, Component, Node, Label } from 'cc';
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import {
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BehaviorTreeBuilder,
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BehaviorTree,
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Blackboard
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} from '@esengine/ai';
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const { ccclass, property } = _decorator;
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/**
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* 行为树示例用法
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* 展示如何在Cocos Creator中加载并执行行为树
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*/
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@ccclass('BehaviorTreeExampleUsage')
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export class BehaviorTreeExampleUsage extends Component {
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@property(Label)
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statusLabel: Label = null;
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@property(Label)
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logLabel: Label = null;
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private behaviorTree: BehaviorTree<any> = null;
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private blackboard: Blackboard = null;
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private isRunning: boolean = false;
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private logs: string[] = [];
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private executionContext: any = null;
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onLoad() {
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this.setupBehaviorTree();
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}
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private setupBehaviorTree() {
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try {
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// 行为树配置（通常从JSON文件加载）
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const behaviorTreeConfig = {
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"nodes": [
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{
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"id": "root_1",
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"type": "root",
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"name": "AI智能体行为树",
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"children": ["selector_main"]
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},
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{
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"id": "selector_main",
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"type": "selector",
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"name": "主选择器",
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"properties": {
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"abortType": "LowerPriority"
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},
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"children": ["sequence_combat", "sequence_patrol", "sequence_idle"]
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},
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{
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"id": "sequence_combat",
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"type": "sequence",
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"name": "战斗序列",
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"children": ["condition_enemy", "action_attack"]
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},
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{
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"id": "condition_enemy",
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"type": "condition-random",
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"name": "发现敌人",
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"properties": {
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"successProbability": 0.3
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}
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},
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{
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"id": "action_attack",
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"type": "log-action",
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"name": "攻击敌人",
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"properties": {
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"message": "发动攻击！当前生命值: {{health}}, 能量: {{energy}}",
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"logLevel": "warn"
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}
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},
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{
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"id": "sequence_patrol",
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"type": "sequence",
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"name": "巡逻序列",
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"children": ["action_move", "wait_patrol"]
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},
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{
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"id": "action_move",
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"type": "set-blackboard-value",
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"name": "移动巡逻",
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"properties": {
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"variableName": "lastAction",
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"value": "巡逻中"
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}
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},
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{
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"id": "wait_patrol",
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"type": "wait-action",
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"name": "巡逻等待",
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"properties": {
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"waitTime": 2
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}
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},
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{
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"id": "sequence_idle",
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"type": "sequence",
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"name": "闲置序列",
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"children": ["action_idle", "wait_idle"]
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},
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{
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"id": "action_idle",
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"type": "log-action",
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"name": "闲置状态",
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"properties": {
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"message": "当前状态: 闲置中，生命值: {{health}}"
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}
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},
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{
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"id": "wait_idle",
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"type": "wait-action",
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"name": "闲置等待",
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"properties": {
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"waitTime": 1
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}
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}
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],
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"blackboard": [
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{
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"name": "health",
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"type": "number",
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"value": 100,
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"description": "角色生命值"
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},
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{
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"name": "energy",
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"type": "number",
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"value": 80,
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"description": "角色能量值"
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},
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{
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"name": "lastAction",
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"type": "string",
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"value": "待机",
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"description": "最后执行的动作"
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},
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{
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"name": "enemyDetected",
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"type": "boolean",
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"value": false,
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"description": "是否检测到敌人"
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}
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]
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};
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// 创建执行上下文
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this.executionContext = {
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node: this.node,
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component: this,
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// 添加日志方法供行为树节点使用
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log: (message: string, level: string = 'info') => {
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this.addLog(`🤖 [${level.toUpperCase()}] ${message}`);
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}
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};
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// 🎯 使用 @esengine/ai 的 BehaviorTreeBuilder API - 一行代码完成所有初始化！
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const result = BehaviorTreeBuilder.fromBehaviorTreeConfig(behaviorTreeConfig, this.executionContext);
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this.behaviorTree = result.tree;
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this.blackboard = result.blackboard;
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this.executionContext = result.context;
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this.updateStatus('行为树加载完成');
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this.addLog('✅ 行为树初始化成功');
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this.addLog(`📊 节点总数: ${behaviorTreeConfig.nodes.length}`);
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this.addLog(`📋 变量总数: ${behaviorTreeConfig.blackboard.length}`);
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// 自动开始执行
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this.startBehaviorTree();
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} catch (error) {
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console.error('行为树设置失败:', error);
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this.updateStatus('设置失败: ' + error.message);
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this.addLog('❌ 行为树设置失败: ' + error.message);
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}
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}
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private startBehaviorTree() {
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this.isRunning = true;
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this.behaviorTree.reset();
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this.updateStatus('执行中...');
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this.addLog('🚀 开始执行行为树');
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}
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private stopBehaviorTree() {
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this.isRunning = false;
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this.updateStatus('已停止');
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this.addLog('⏹️ 行为树执行已停止');
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if (this.behaviorTree) {
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this.behaviorTree.reset();
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}
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}
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update(deltaTime: number) {
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if (!this.isRunning || !this.behaviorTree) {
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return;
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}
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try {
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// 每帧执行行为树
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this.behaviorTree.tick(deltaTime);
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} catch (error) {
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console.error('行为树执行出错:', error);
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this.addLog('❌ 执行出错: ' + error.message);
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this.stopBehaviorTree();
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}
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}
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private updateStatus(status: string) {
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if (this.statusLabel) {
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this.statusLabel.string = status;
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}
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console.log('[BehaviorTree] 状态:', status);
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}
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private addLog(message: string) {
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this.logs.push(`[${new Date().toLocaleTimeString()}] ${message}`);
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// 只保留最新的20条日志
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if (this.logs.length > 20) {
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this.logs.shift();
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}
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if (this.logLabel) {
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this.logLabel.string = this.logs.join('\n');
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}
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console.log('[BehaviorTree]', message);
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}
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// 手动控制方法（可以绑定到UI按钮）
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onStartButtonClick() {
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if (!this.isRunning) {
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this.startBehaviorTree();
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}
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}
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onStopButtonClick() {
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if (this.isRunning) {
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this.stopBehaviorTree();
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}
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}
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// 修改黑板变量的示例方法
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onModifyHealthClick() {
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if (this.blackboard) {
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const currentHealth = this.blackboard.getValue('health', 100);
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const newHealth = Math.max(0, currentHealth - 10);
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this.blackboard.setValue('health', newHealth);
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this.addLog(`🩺 生命值变更: ${currentHealth} -> ${newHealth}`);
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}
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}
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onModifyEnergyClick() {
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if (this.blackboard) {
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const currentEnergy = this.blackboard.getValue('energy', 80);
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const newEnergy = Math.max(0, currentEnergy - 5);
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this.blackboard.setValue('energy', newEnergy);
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this.addLog(`⚡ 能量变更: ${currentEnergy} -> ${newEnergy}`);
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}
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}
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onDestroy() {
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this.stopBehaviorTree();
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}
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}
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/**
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* 使用说明：
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*
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* 1. 安装依赖：
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* npm install @esengine/ai
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*
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* 2. 将此脚本挂载到场景中的节点上
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*
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* 3. 在属性检查器中设置：
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* - statusLabel: 用于显示当前状态的Label组件
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* - logLabel: 用于显示日志信息的Label组件
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*
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* 4. 运行场景，观察行为树的执行效果
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*
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* 5. 可以添加按钮并绑定控制方法：
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* - onStartButtonClick(): 开始执行
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* - onStopButtonClick(): 停止执行
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* - onModifyHealthClick(): 修改生命值
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* - onModifyEnergyClick(): 修改能量值
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*/
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