This is a very simple toy-object: it takes 2 vertices and draws a (hyper-) cube which is the bounding box of the two vertices.
Syntax:
BBOX
x[0] y[0] z[0]
x[1] y[1] z[1]
or
4BBOX
x[0] y[0] z[0] w[0]
x[1] y[1] z[1] w[1]
or
nBBOX
Ndim # > 3
x[0] y[0] z[0] w[0] ...
x[1] y[1] z[1] w[1] ...
or
4nBBOX
Ndim # > 3
d[0] x[0] y[0] z[0] w[0] ...
d[0] x[1] y[1] z[1] w[1] ...
There is no BBOX binary format. The 4 modifyer has different
meanings depending on the dimension of the bounding box: 4BBOX
means that the 4 components of the vertices make up a 4-dimensional
bounding-box. Using 4 in conjunction with n –
4nBBOX NDim – means that the vertices specified in the
file have NDim+1 components, but the component at index 0 is the
homogeneous divisor (in contrast to the ordinary 3d case where the
homogeneous divisor would be the w – the third – component).