4.2.3 BBOX: simple bounding boxes

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-dimensionional 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).