navigating the box

[Gilles Dubois]

The data members of the 'box' objects are rather strange, the referential that we can form from them is very different from the usual 'local referential' attached to a moving solid. Honestly I was a little lost first time to locate specific or generic point of a box. So I decided to write a simple program illustrating the construction of an orthonormal basis from axis and up and using it to locate specific points like the vertices.

[Bruce Sherwood]

I'm not sure I understand your comment, but I'll point out that missing from the documentation is the bounding_box function:

b = box()
b.rotate(axis=vec(0,0,1), angle=pi/4)
print(b.bounding_box())

Bruce

[Gilles Dubois]

Thank you Bruce. But in which order the points coordinates are listed ???

Let's make my comment simpler :

Why b.up is unitary ans b.axis is not ? It would be much simpler (length is given anyway)
Some box data is redundant length is norm of axis, no ?

[Gilles Dubois]

Maybe like this

[Bruce Sherwood]

The bounding_box() function simply provides the details of the bounding box of the object; no order is specified. Yes, there is some redundant information, essentially to provide flexibility in how one thinks about the object; sometimes you want the length, and sometimes you want that information in the form of a vector.

Bruce