Method update

packages/core/src/ECS/Scene.ts:513–530

* 更新场景

()

     * 更新场景
     */
    public update() {
        this.epochManager.increment();
        ProfilerSDK.beginFrame();
        const frameHandle = ProfilerSDK.beginSample('Scene.update', ProfileCategory.ECS);

        try {
            ComponentPoolManager.getInstance().update();
            this.entities.updateLists();
            const systems = this.systems;

            this._runSystemPhase(systems, 'update', 'Systems.update');
            this._runSystemPhase(systems, 'lateUpdate', 'Systems.lateUpdate');
            this.flushCommandBuffers(systems);
        } finally {
            ProfilerSDK.endSample(frameHandle);
            ProfilerSDK.endFrame();
        }
    }

    /**
     * @zh 执行系统的指定阶段