polygonjs-engine/dist/src/engine/scene/utils/CamerasController.js

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

export class CamerasController {
  constructor(scene) {
    this.scene = scene;
    this._masterCameraNodePath = null;
  }
  setMasterCameraNodePath(camera_node_path) {
    this._masterCameraNodePath = camera_node_path;
  }
  masterCameraNodePath() {
    return this._masterCameraNodePath;
  }
  masterCameraNode() {
    if (this.masterCameraNodePath) {
      const path = this.masterCameraNodePath();
      if (!path) {
        return this._find_any_camera();
      }
      const camera_node = this.scene.node(path);
      return camera_node;
    } else {
      console.warn("master camera node not found");
      return this._find_any_camera();
    }
  }
  _find_any_camera() {
    const root = this.scene.root();
    return root.nodesByType("perspectiveCamera")[0] || root.nodesByType("orthographicCamera")[0];
  }
}