     z * (1 << @BUCKET_SIZE_P * 2)
 
 
-  getBucketDataByZoomedAddress : (address, createIfNull = false) ->
+  getBucketDataByZoomedAddress : (address, createIfUndefined = false) ->
 
     if address[3] >= @ZOOM_STEP_COUNT
       return null

      bucket = cube[bucketIndex]
      if bucket? and bucket != @LOADING_PLACEHOLDER
        return bucket
      else if createIfNull
        return cube[bucketIndex] = new Uint8Array(@BUCKET_LENGTH)

    return null

    return null


  getBucketAndVoxelIndex : (voxel, zoomStep, createBucketIfUndefined = false ) ->

    address     = @positionToZoomedAddress( voxel, zoomStep )
    voxelOffset = @getVoxelOffset( voxel )

    return {
      bucket : @getBucketDataByZoomedAddress(address, createBucketIfUndefined)
      voxelIndex : @BYTE_OFFSET * @getVoxelIndexByVoxelOffset(voxelOffset) }


