- XLogo Recursion
Many plants exhibit recursive properties in their structures. Ferns are a good example. Each branch is a smaller replica of the whole fern leaf.
To New
# set default screen, pen and turtle values
ResetAll SetScreenSize [400 400] HideTurtle
SetSC Black SetPC Green SetPS 1 PenUp
End
To Hue :Angle
# Green from 187 to 252
Make "Green 0.18*:Angle + 187
Output ( List 215 :Green 88 )
End
To Fern :Size
If :Size < 5 [Stop]
SetPC Hue Heading
Forward :Size / 20
Left 80 Fern :Size * 0.3
Right 82 Forward :Size / 20
Right 80 Fern :Size * 0.3
Left 78 Fern :Size * 0.9
Left 2 Back :Size / 20
Left 2 Back :Size / 20
End
To Go
New SetPos [-50 -170] PenDown Fern 440
End
For less detail, increase the size limit (shown in red). See editing procedures.
Also see Fractal Fern created by Chaos Game dot plotting.