functional language for computing with geometry
Currently, all libraries are loaded at set-up by the interpreter. All visible symbols, i.e. those listed in this appendix, are protected and cannot be redefined by the user.
It is easy to see when a symbol is protected: (a) it is colored blue by the Xplode editor, and (b) a false value is returned by the interpreter when asking for the evaluation of a redefinition of some protected symbol. The user may easily change this behavior, by either preventing the loading of some libraries, or by loading them as non-protected at set-up, or by loading some needed library on request during the work session. Let remember that the language is not case-sensitive.
useful set of functions used to produce a graphical representation of a hierarchy, i.e, to perform some tree drawing. In particular, we assume here that every tree node is associated with a string
Drawtree returns a 2D complex giving a
picture of the input hierarchical structure
Pre/Post conds (levels::isseqof:isseq) => (ispol)
Example drawtree:< < < 1 >>,< < 2 , 3 , 4 , 5
>>, < < 6 , 7 >,< >,< 8 , 9 , 10 >,< 11
>>>