code: function Region() {
  
          this.subRegions = [];
  
          this.nSubRegions = 0;
  
          this.node = null;
  
          this.mass = 0;
  
          this.centerOfMass = null;
  
          this.bbox = new Float32Array(4);
  
          this.size = 0;
      }
docs: **************************
  Class: Region
  *************************