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-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).