Hi,
When I try to do something in Factor:
1. I look in libraries if a word do what I want (not always simple,
and sometimes really hard)
2. I try to do it by myself if it is easy
3. I look at examples in extra vocabs and try to understand what is
done (a great hand parsing job !)
When I began 4DNav I defined my own camera movements. I then
discovered opengl.camera and I refactored my code to use this vocab
(Self always looks magical for me but it woks).
When turtle disappeared due to delegation incompatibility I tried to
rewrite it. The only solution I found was to merge into a single file
turtle pos and ori. Not very nice but that works.
Make-matrix was easy to understand and do the job well.
Of course your new Rz code is simpler to read and reusable
everywhere. It is what I always looked for.
But I am not sure that the gap between:
> : make-matrix ( quot width -- matrix ) >r { } make r> group ; inline
> (oups sorry, [ { } make ] dip group )
and
> :: [deep-cleave-quots] ( SEQ -- quot )
> [let | QUOTS [ SEQ [ quotation? ] deep-
filter ]
> RECIPE [ SEQ [ dup quotation? [ drop , ] [ ] if ] deep-
map ] |
> [ QUOTS cleave RECIPE bake ] ] ;
> MACRO: deep-cleave-quots ( seq -- quot ) [deep-cleave-quots] ;
is easy to cross for a newbie. Slava's solution is more readable for
me, but the most difficult point is to discover that words like deep-
map and deep-filter exist.
By the way I also used make-matrix for my 4D rotations, I will
rewrite my code with deep-cleave-quots. Also with this new word I
would now be able to implement a word for a rotation in a N
dimensional space in order to factor Rx Ry Rz, 4D-Rxy, 4D-Ryw...
thanks for your precious advices
Jeff
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