@polygonjs/polygonjs/dist/src/engine/nodes/obj/utils/HelperController.js

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

"use strict";
export class HelperController {
  constructor(node, _helperConstructor, _name) {
    this.node = node;
    this._helperConstructor = _helperConstructor;
    this._name = _name;
  }
  initializeNode() {
    this.node.flags.display.onUpdate(() => {
      this.update();
    });
  }
  visible() {
    return this.node.flags.display.active() && this.node.pv.showHelper;
  }
  _createHelper() {
    const helper = new this._helperConstructor(this.node, this._name);
    helper.build();
    return helper;
  }
  update() {
    if (this.visible()) {
      if (!this._helper) {
        this._helper = this._createHelper();
      }
      if (this._helper) {
        this.node.light.add(this._helper.object);
        this._helper.update();
      }
    } else {
      if (this._helper) {
        this.node.light.remove(this._helper.object);
      }
    }
  }
}