#!/usr/bin/ucblogo
;; Copyright 2012, 2014 Kevin Ryde
;;
;; This file is part of Math-PlanePath.
;;
;; Math-PlanePath is free software; you can redistribute it and/or modify it
;; under the terms of the GNU General Public License as published by the Free
;; Software Foundation; either version 3, or (at your option) any later
;; version.
;;
;; Math-PlanePath is distributed in the hope that it will be useful, but
;; WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
;; or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
;; for more details.
;;
;; You should have received a copy of the GNU General Public License along
;; with Math-PlanePath. If not, see .
;; hexagons overlapping much but slowly expanding
to fibbinary.next :n
localmake "filled bitor :n (lshift :n -1)
localmake "mask lshift (bitxor :filled (:filled + 1)) -1
output (bitor :n :mask) + 1
end
; to print.binary :n
; do.while [
; type bitand :n 1
; make "n lshift :n -1
; ] [:n <> 0]
; print "
; end
; make "n 0
; for [i 0 21 1] [
; print "n
; print :n
; print.binary :n
; make "n fibbinary.next :n
; ]
to fib.hex :steps
; right 90
; left 45
; penup
; back 300
; right 90
; pendown
localmake "step.len 10
localmake "n 0
for [i 0 :steps 1] [
forward :step.len
if (bitand :n 1)=0 [left 60] [right 60]
make "n fibbinary.next :n
]
end
fib.hex 210000