@giro3d/giro3d/core/OBB.js

A JS/WebGL framework for 3D geospatial data visualization

import { Box3, Object3D, Vector3 } from 'three';
class OBB extends Object3D {
  isHelper = true;
  type = 'OBB';
  constructor(min, max) {
    super();
    this.box3D = new Box3(min.clone(), max.clone());
    this.natBox = this.box3D.clone();
    this.z = {
      min: 0,
      max: 0
    };
    this.topPointsWorld = [new Vector3(), new Vector3(), new Vector3(), new Vector3()];
    this.update();
  }
  clone() {
    const cOBB = new OBB(this.natBox.min, this.natBox.max);
    cOBB.position.copy(this.position);
    cOBB.quaternion.copy(this.quaternion);
    return cOBB;
  }
  updateMinMax(min, max) {
    this.box3D.min.copy(min);
    this.box3D.max.copy(max);
    this.natBox.copy(this.box3D);
    this.update();
  }
  update() {
    this.updateMatrixWorld(true);
    this._cPointsWorld(this._points(this.topPointsWorld));
  }
  updateZ(min, max) {
    this.z = {
      min,
      max
    };
    this.box3D.min.z = this.natBox.min.z + min;
    this.box3D.max.z = this.natBox.max.z + max;
    this.update();
  }
  _points(points) {
    // top points of bounding box
    points[0].set(this.box3D.max.x, this.box3D.max.y, this.box3D.max.z);
    points[1].set(this.box3D.min.x, this.box3D.max.y, this.box3D.max.z);
    points[2].set(this.box3D.min.x, this.box3D.min.y, this.box3D.max.z);
    points[3].set(this.box3D.max.x, this.box3D.min.y, this.box3D.max.z);
    // bottom points of bounding box
    if (points.length > 4) {
      points[4].set(this.box3D.max.x, this.box3D.max.y, this.box3D.min.z);
      points[5].set(this.box3D.min.x, this.box3D.max.y, this.box3D.min.z);
      points[6].set(this.box3D.min.x, this.box3D.min.y, this.box3D.min.z);
      points[7].set(this.box3D.max.x, this.box3D.min.y, this.box3D.min.z);
    }
    return points;
  }
  _cPointsWorld(points) {
    const m = this.matrixWorld;
    for (let i = 0, max = points.length; i < max; i++) {
      points[i].applyMatrix4(m);
    }
    return points;
  }
}
export default OBB;