VoxelSpace-class.RdClass that holds the state variables of every voxel of the voxel
space in a data.table::data.table object, plus metadata from the
voxel space header.
An object of class VoxelSpace.
filethe path of the voxel file (.vox).
datathe voxels hold in a data.table.
headera list of parameters associated to this voxel file.