Circular Path Example
Model was written in NetLogo 5.0.4
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globals [radius] to setup clear-all set radius max-pxcor - 2 ;; make 12 turtles, equally spaced in heading create-ordered-turtles 12 [ ;; move to edge of circle fd radius ;; turn to face clockwise rt 90 ;; bigger turtles are easier to see set size 3 ;; thicker line is easier to see set pen-size 3 ;; leave a trail pen-down ] reset-ticks end to go-distance ask turtles [ arc-forward-by-dist step-size ] tick end to go-angle ask turtles [ arc-forward-by-angle arc-angle ] tick end ;; This is the core procedure. It moves the turtle to the next point ;; on the circle, the given distance along the curve. to arc-forward-by-dist [dist] ;; turtle procedure ;; calculate how much of an angle we'll be turning through ;; (essentially converting radians to degrees) let theta dist * 180 / (pi * radius) ;; turn to face the next point we're going to rt theta / 2 ;; go there fd dist ;; turn to face tangent to the circle rt theta / 2 end to arc-forward-by-angle [angle] ;; turn to face the next point we're going to rt angle / 2 ;; calculate the distance we'll have to move forward ;; in order to stay on the circle. Go there. fd 2 * radius * sin (angle / 2) ;; turn to face tangent to the circle rt angle / 2 end ; Public Domain: ; To the extent possible under law, Uri Wilensky has waived all ; copyright and related or neighboring rights to this model.
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Attached files
File | Type | Description | Last updated | |
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Circular Path Example.png | preview | Preview for 'Circular Path Example' | over 11 years ago, by Uri Wilensky | Download |
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