Method queryChangedSince

packages/core/src/ECS/Core/QuerySystem.ts:573–605

* 查询自指定 epoch 以来发生变更的实体 * * 返回拥有指定组件且该组件在 sinceEpoch 之后被修改过的实体。 * 用于实现增量更新，只处理发生变化的实体。 * * Query entities with components changed since the specified epoch. * Returns entities that have the specified component type(s) and that component * was modified after sinceEp

(sinceEpoch: number, ...componentTypes: ComponentType[])

     * ```
     */
    public queryChangedSince(sinceEpoch: number, ...componentTypes: ComponentType[]): QueryResult {
        const startTime = performance.now();
        this._queryStats.totalQueries++;
        this._queryStats.dirtyChecks++;

        // 先获取所有拥有这些组件的实体
        const baseResult = this.queryAll(...componentTypes);
        const changedEntities: Entity[] = [];

        // 过滤出组件发生变更的实体
        for (const entity of baseResult.entities) {
            let hasChanged = false;

            for (const componentType of componentTypes) {
                const component = entity.getComponent(componentType);
                if (component && component.lastWriteEpoch > sinceEpoch) {
                    hasChanged = true;
                    break;
                }
            }

            if (hasChanged) {
                changedEntities.push(entity);
            }
        }

        return {
            entities: changedEntities,
            count: changedEntities.length,
            executionTime: performance.now() - startTime,
            fromCache: false
        };
    }

    /**
     * 按单个组件类型查询实体