code: function IsoSurface(numOfGridPts, size) {
    size = size || 1;
    this.numOfGridPts = numOfGridPts || 16;
  
    this.tresholdValue = 1;
  
    this.makeGrid(size);
  
    Geometry.call(this, { vertices: true, normals: true, texCoords: true, faces: true });
  }
docs: ### IsoSurface ( numOfGridPts, size ) `numOfGridPts` - number of grid pooints *{ Number/Int = 16 }* `size` - grid bounding box size *{ Number = 1 }*