pers = [];
          this.octreeHelpers = [];
          this.coordinatesHelper = null;

          this.ohIndexToPhName = [];
          this.ohIndexToPhIndex = [];
          this.phIndexMap = {};
          this.ohIndexMap = {};

          this.min = [Number.MAX_VALUE, Number.MAX_VALUE, Number.MAX_VALUE];
          this.max = [-Number.MAX_VALUE, -Number.MAX_VALUE, -Number.MAX_VALUE];
          this.maxRadius = -Number.MAX_VALUE;

          this.coords = {
            show: false,
            grid: false,
    