Currently not implemented.
bounds similar to the bounding box, specifies the box within which data is visible.
center the center of the bounding box.
length the length of the bounding box from the minimum point to the maximum, i.e., length along the diagonal.
bbox? Get the bounding box.
bounds= (xmin,ymin,zmin, xmax,ymax,zmax) Set the box within which data is visible.
bounds? Get the visible bounds of the data.
center= (x,y,z) Set the center of the data.
center? Get the center of the data.
compute_bbox! Compute the bounding box for the data.
compute_center! Compute the center of the bounding box.
compute_bbox! Compute the length of the bounding box.
compute_properties! Compute the properties for this data (bounding box, center, length).