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虚拟机 API

蓝图虚拟机负责执行蓝图图:

import { BlueprintVM } from '@esengine/blueprint';
// 创建 VM
const vm = new BlueprintVM(blueprintAsset, entity, scene);
// 启动(触发 BeginPlay)
vm.start();
// 每帧更新(触发 Tick)
vm.tick(deltaTime);
// 停止(触发 EndPlay)
vm.stop();
// 暂停/恢复
vm.pause();
vm.resume();
// 触发事件
vm.triggerEvent('EventCollision', { other: otherEntity });
vm.triggerCustomEvent('OnDamage', { amount: 50 });
// 调试模式
vm.debug = true;
interface ExecutionContext {
blueprint: BlueprintAsset; // 蓝图资产
entity: Entity; // 当前实体
scene: IScene; // 当前场景
deltaTime: number; // 帧间隔时间
time: number; // 总运行时间
// 获取输入值
evaluateInput(nodeId: string, pinName: string, defaultValue: unknown): unknown;
// 设置输出值
setOutput(nodeId: string, pinName: string, value: unknown): void;
// 变量访问
getVariable<T>(name: string): T;
setVariable(name: string, value: unknown): void;
}
interface ExecutionResult {
outputs?: Record<string, unknown>; // 输出值
nextExec?: string | null; // 下一个执行引脚
delay?: number; // 延迟执行(毫秒)
yield?: boolean; // 暂停到下一帧
error?: string; // 错误信息
}
import { Scene, Core } from '@esengine/ecs-framework';
import { BlueprintSystem, BlueprintComponent } from '@esengine/blueprint';
// 添加蓝图系统到场景
const scene = new Scene();
scene.addSystem(new BlueprintSystem());
Core.setScene(scene);
// 为实体添加蓝图
const entity = scene.createEntity('Player');
const blueprint = new BlueprintComponent();
blueprint.blueprintAsset = await loadBlueprintAsset('player.blueprint.json');
entity.addComponent(blueprint);
// 从实体获取蓝图组件并触发事件
const blueprint = entity.getComponent(BlueprintComponent);
if (blueprint?.vm) {
blueprint.vm.triggerEvent('EventCollision', { other: otherEntity });
blueprint.vm.triggerCustomEvent('OnPickup', { item: itemEntity });
}
import { validateBlueprintAsset } from '@esengine/blueprint';
function saveBlueprint(blueprint: BlueprintAsset, path: string): void {
if (!validateBlueprintAsset(blueprint)) {
throw new Error('Invalid blueprint structure');
}
const json = JSON.stringify(blueprint, null, 2);
fs.writeFileSync(path, json);
}
async function loadBlueprint(path: string): Promise<BlueprintAsset> {
const json = await fs.readFile(path, 'utf-8');
const asset = JSON.parse(json);
if (!validateBlueprintAsset(asset)) {
throw new Error('Invalid blueprint file');
}
return asset;
}