@polygonjs/polygonjs/dist/src/engine/poly/ScenesRegister.js

node-based WebGL 3D engine https://polygonjs.com

"use strict";
export class ScenesRegister {
  constructor() {
    this._scenes = /* @__PURE__ */ new Set();
    this._registerTimeByScene = /* @__PURE__ */ new Map();
  }
  registerScene(scene) {
    if (this._scenes.has(scene)) {
      console.warn("scene was already registered");
      return;
    }
    this._scenes.add(scene);
    this._registerTimeByScene.set(scene, performance.now());
    this._updateCache();
  }
  deregisterScene(scene) {
    this._scenes.delete(scene);
    this._registerTimeByScene.delete(scene);
    this._updateCache();
  }
  dispose() {
    const scenes = this.scenes();
    for (const scene of scenes) {
      scene.dispose();
    }
  }
  lastRegisteredScene() {
    return this._lastRegisteredScene;
  }
  scenes() {
    const scenes = [];
    this._scenes.forEach((scene) => scenes.push(scene));
    return scenes;
  }
  _updateCache() {
    this._lastRegisteredScene = void 0;
    this._registerTimeByScene.forEach((registerTime, scene) => {
      if (this._lastRegisteredScene == void 0) {
        this._lastRegisteredScene = scene;
      } else {
        const lastRegisterTime = this._registerTimeByScene.get(this._lastRegisteredScene);
        if (registerTime != null && lastRegisterTime != null) {
          if (registerTime > lastRegisterTime) {
            this._lastRegisteredScene = scene;
          }
        }
      }
    });
  }
}