globals [ number ; number of turles increment ; define which turtle to face colorlist ; list of color colorvalues ] turtles-own [ target ; ID number of the turtle to target catch ; true when turtle try to catch target, false when turtle try to escape from target dist-away ; distance from target close ; min distance to target ( distance to reach) far ; max distance to target ] to setup ca set colorlist ( list "black" "gray" "white" "red" "orange" "brown" "yellow" "green" "lime" "turquoise" "cyan" "sky" "blue" "violet" "magenta" "pink") set colorvalues (list black gray white red orange brown yellow green lime turquoise cyan sky blue violet magenta pink) ifelse ( number-of-turtles = Facing_turtle_Who_+ ) ; turtle0 will face turtle0 and so on...not allowed [user-message "Please change your setting. With this value each turle is facing itself !!! "] [ set number number-of-turtles set increment Facing_turtle_Who_+ set-default-shape turtles "circle" cct number [ set size 1.5 set catch true set target ((who + increment ) mod number) ] initiate-sliders update-param if start-from = "center"[ask turtles [ fd 0.4 pd]] if start-from = "far0,far1...from center" [ask turtles [ fd far pd]] if start-from = "random points" [ask turtles [ rt random-float 360 jump random-float screen-edge-x pd]] ] end to initiate-sliders if number < 7 [set close6 1 set far6 15] if number < 6 [set close5 1 set far5 15] if number < 5 [set close4 1 set far4 15] if number < 4 [set close3 1 set far3 15] end to update-param if same [ set close0 close-all set close1 close-all set close2 close-all set close3 close-all set close4 close-all set close5 close-all set close6 close-all set far0 far-all set far1 far-all set far2 far-all set far3 far-all set far4 far-all set far5 far-all set far6 far-all ] ask turtle 0 [ set close close0 set far far0 set color item ( position color0 colorlist) colorvalues] ask turtle 1 [ set close close1 set far far1 set color item ( position color1 colorlist) colorvalues] ask turtle 2 [ set close close2 set far far2 set color item ( position color2 colorlist) colorvalues] if number > 3 [ask turtle 3 [ set close close3 set far far3 set color item ( position color3 colorlist) colorvalues]] if number > 4 [ask turtle 4 [ set close close4 set far far4 set color item ( position color4 colorlist) colorvalues]] if number > 5 [ask turtle 5 [ set close close5 set far far5 set color item ( position color5 colorlist) colorvalues]] if number > 6 [ask turtle 6 [ set close close6 set far far6 set color item ( position color6 colorlist) colorvalues]] ask patches [set pcolor background ] ; color the patches end to go every 0.05 [ update-param ask turtles [ set dist-away distance turtle (target) ifelse catch [ifelse dist-away > close [ set heading towards turtle (target) fd 0.5] [set catch false] ] [ifelse distance turtle (target ) < far [set heading (towards turtle (target) + 180 ) fd 0.5] [set catch true] ] ] ] end to copy-view let file user-choose-new-file if (file != false) [ ifelse ( file-exists? file ) [ export-view file] [ export-view (file + ".png")] ] end ; (C) 2004 Uri Wilensky. This code may be freely copied, distributed, ; altered, or otherwise used by anyone for any legal purpose. ; ; THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ; "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT ; LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR ; A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT ; OWNERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, ; SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT ; LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, ; DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY ; THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT ; (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE ; OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. @#$#@#$#@ GRAPHICS-WINDOW 379 15 793 450 50 50 4.0 1 10 1 1 1 0 1 1 1 CC-WINDOW 5 526 802 621 Command Center 0 BUTTON 256 12 311 45 NIL setup NIL 1 T OBSERVER T NIL BUTTON 315 12 370 45 go go T 1 T OBSERVER T NIL SLIDER 11 206 135 239 close0 close0 0 5 1.7 0.1 1 NIL SLIDER 11 253 135 286 close1 close1 0 5 1.7 0.1 1 NIL SLIDER 12 301 137 334 close2 close2 0 5 1.7 0.1 1 NIL SLIDER 11 346 136 379 close3 close3 0 5 1.7 0.1 1 NIL SLIDER 142 206 279 239 far0 far0 1 30 30 1 1 NIL SLIDER 142 254 279 287 far1 far1 1 30 30 1 1 NIL SLIDER 143 301 281 334 far2 far2 1 30 30 1 1 NIL SLIDER 142 346 281 379 far3 far3 1 30 30 1 1 NIL SLIDER 387 457 559 490 background background 0 140 86 1 1 NIL SLIDER 9 390 136 423 close4 close4 0 5 1.7 0.1 1 NIL SLIDER 11 435 138 468 close5 close5 0 5 1.7 0.1 1 NIL SLIDER 10 479 138 512 close6 close6 0 5 1.7 0.1 1 NIL SLIDER 141 391 281 424 far4 far4 1 30 30 1 1 NIL SLIDER 142 435 281 468 far5 far5 1 30 30 1 1 NIL SLIDER 141 479 281 512 far6 far6 1 30 30 1 1 NIL SLIDER 4 12 118 45 number-of-turtles number-of-turtles 3 7 5 1 1 NIL CHOOSER 281 193 373 238 color0 color0 "black" "gray" "white" "red" "orange" "brown" "yellow" "green" "lime" "turquoise" "cyan" "sky" "blue" "violet" "magenta" "pink" 3 CHOOSER 281 241 373 286 color1 color1 "black" "gray" "white" "red" "orange" "brown" "yellow" "green" "lime" "turquoise" "cyan" "sky" "blue" "violet" "magenta" "pink" 6 CHOOSER 282 288 374 333 color2 color2 "black" "gray" "white" "red" "orange" "brown" "yellow" "green" "lime" "turquoise" "cyan" "sky" "blue" "violet" "magenta" "pink" 2 CHOOSER 282 333 374 378 color3 color3 "black" "gray" "white" "red" "orange" "brown" "yellow" "green" "lime" "turquoise" "cyan" "sky" "blue" "violet" "magenta" "pink" 0 CHOOSER 283 377 375 422 color4 color4 "black" "gray" "white" "red" "orange" "brown" "yellow" "green" "lime" "turquoise" "cyan" "sky" "blue" "violet" "magenta" "pink" 4 CHOOSER 283 422 375 467 color5 color5 "black" "gray" "white" "red" "orange" "brown" "yellow" "green" "lime" "turquoise" "cyan" "sky" "blue" "violet" "magenta" "pink" 0 CHOOSER 283 467 375 512 color6 color6 "black" "gray" "white" "red" "orange" "brown" "yellow" "green" "lime" "turquoise" "cyan" "sky" "blue" "violet" "magenta" "pink" 0 CHOOSER 6 48 182 93 Start-from Start-from "center" "far0,far1...from center" "random points" 1 BUTTON 258 52 371 85 Change minds ask turtles [set catch not(catch)] NIL 1 T OBSERVER T NIL BUTTON 564 458 685 491 Change Background set pcolor background T 1 T PATCH T NIL BUTTON 696 458 790 491 Copy View copy-view NIL 1 T OBSERVER T NIL SWITCH 94 104 184 137 Same Same 0 1 -1000 SLIDER 13 140 138 173 close-all close-all 0 5 1.7 0.1 1 NIL SLIDER 141 140 280 173 far-all far-all 1 30 30 1 1 NIL TEXTBOX 192 103 360 136 If On all turles share the same values for close and far distances TEXTBOX 31 186 269 204 Individual values for each turtles (if same is Off) SLIDER 121 12 249 45 Facing_turtle_Who_+ Facing_turtle_Who_+ 1 6 1 1 1 NIL @#$#@#$#@ WHAT IS IT? ----------- This is the following model of "Good morning turtles". Now each turtle can have its own values for close,far,and color. see "Good morning turles" Each turtle is facing a single turlte. Each turle moves toward the turtle it is facing until it reachs a distance define by its "close" value, then it changes its mind and escapes in the opposite direction until the distance is equal to its "far" value. Then back again to try to reach the targeted turtle. HOW TO USE IT ------------- Each turle has its values defined by two sliders, "close", "far", and one chooser for its color.All those values can be changed when running the simulation. The initial position of the turle is set by a chooser "Start-from".It may be random.... There is also a "go once" button which when hit, changes the mind of all turtles... Of course you can simulate the previous model by just setting the "same" switch On The "background" slider allows you to change the background color when running. The "change background" allow the same thing but when go button is off. And the "Copy View " does exactly what its name suggests... THINGS TO TRY ------------- ...Set "same" swith On. ...Set the sliders : number of turtles to 5, facing slider to 1, close-all to 0.5, far-all to 30 then run the model.... watch what happens....You can change while running the model the sliders close-all and far-all to see what happens... ... set the sliders : number to 7, increment to 1 and change when running close value to 0.5 or less and then back again to 1 or more ....some settings seems very unstable ... set the sliders : number to 7, increment to 3 and change when running close and far sliders ....some settings seems very stable Play with different settings , modifying close and far values to get different drawings.... ... set close value to 0.5 or less, wait a few seconds and move it back over 0.5, if it doesn't seems chaotic, move back to 0.5 or less ...until the path seems unpredictable then just watch ...you can also change far value. In fact I don't know why this is happening ..... ...Set "same" swith off and play with the different settings to get nice drawings CREDITS AND REFERENCES ---------------------- The idea of this model is comming from a math Puzzle you can find at://plus.maths.org/issue2/puzzle/beetles.html You can have the mathematical solution of the original puzzle in this very very interesting site: http://plus.maths.org this model is related to Good morning turtles author: Michel Viacroze (michel.viacroze@holcim.com) @#$#@#$#@ default true 0 Polygon -7500403 true true 150 5 40 250 150 205 260 250 airplane true 0 Polygon -7500403 true true 150 0 135 15 120 60 120 105 15 165 15 195 120 180 135 240 105 270 120 285 150 270 180 285 210 270 165 240 180 180 285 195 285 165 180 105 180 60 165 15 arrow true 0 Polygon -7500403 true true 150 0 0 150 105 150 105 293 195 293 195 150 300 150 box false 0 Polygon -7500403 true true 150 285 285 225 285 75 150 135 Polygon -7500403 true true 150 135 15 75 150 15 285 75 Polygon -7500403 true true 15 75 15 225 150 285 150 135 Line -16777216 false 150 285 150 135 Line -16777216 false 150 135 15 75 Line -16777216 false 150 135 285 75 bug true 0 Circle -7500403 true true 96 182 108 Circle -7500403 true true 110 127 80 Circle -7500403 true true 110 75 80 Line -7500403 true 150 100 80 30 Line -7500403 true 150 100 220 30 butterfly true 0 Polygon -7500403 true true 150 165 209 199 225 225 225 255 195 270 165 255 150 240 Polygon -7500403 true true 150 165 89 198 75 225 75 255 105 270 135 255 150 240 Polygon -7500403 true true 139 148 100 105 55 90 25 90 10 105 10 135 25 180 40 195 85 194 139 163 Polygon -7500403 true true 162 150 200 105 245 90 275 90 290 105 290 135 275 180 260 195 215 195 162 165 Polygon -16777216 true false 150 255 135 225 120 150 135 120 150 105 165 120 180 150 165 225 Circle -16777216 true false 135 90 30 Line -16777216 false 150 105 195 60 Line -16777216 false 150 105 105 60 car false 0 Polygon -7500403 true true 300 180 279 164 261 144 240 135 226 132 213 106 203 84 185 63 159 50 135 50 75 60 0 150 0 165 0 225 300 225 300 180 Circle -16777216 true false 180 180 90 Circle -16777216 true false 30 180 90 Polygon -16777216 true false 162 80 132 78 134 135 209 135 194 105 189 96 180 89 Circle -7500403 true true 47 195 58 Circle -7500403 true true 195 195 58 circle false 0 Circle -7500403 true true 0 0 300 circle 2 false 0 Circle -7500403 true true 0 0 300 Circle -16777216 true false 30 30 240 cow false 0 Polygon -7500403 true true 200 193 197 249 179 249 177 196 166 187 140 189 93 191 78 179 72 211 49 209 48 181 37 149 25 120 25 89 45 72 103 84 179 75 198 76 252 64 272 81 293 103 285 121 255 121 242 118 224 167 Polygon -7500403 true true 73 210 86 251 62 249 48 208 Polygon -7500403 true true 25 114 16 195 9 204 23 213 25 200 39 123 cylinder false 0 Circle -7500403 true true 0 0 300 dot false 0 Circle -7500403 true true 90 90 120 face happy false 0 Circle -7500403 true true 8 8 285 Circle -16777216 true false 60 75 60 Circle -16777216 true false 180 75 60 Polygon -16777216 true false 150 255 90 239 62 213 47 191 67 179 90 203 109 218 150 225 192 218 210 203 227 181 251 194 236 217 212 240 face neutral false 0 Circle -7500403 true true 8 7 285 Circle -16777216 true false 60 75 60 Circle -16777216 true false 180 75 60 Rectangle -16777216 true false 60 195 240 225 face sad false 0 Circle -7500403 true true 8 8 285 Circle -16777216 true false 60 75 60 Circle -16777216 true false 180 75 60 Polygon -16777216 true false 150 168 90 184 62 210 47 232 67 244 90 220 109 205 150 198 192 205 210 220 227 242 251 229 236 206 212 183 fish false 0 Polygon -1 true false 44 131 21 87 15 86 0 120 15 150 0 180 13 214 20 212 45 166 Polygon -1 true false 135 195 119 235 95 218 76 210 46 204 60 165 Polygon -1 true false 75 45 83 77 71 103 86 114 166 78 135 60 Polygon -7500403 true true 30 136 151 77 226 81 280 119 292 146 292 160 287 170 270 195 195 210 151 212 30 166 Circle -16777216 true false 215 106 30 flag false 0 Rectangle -7500403 true true 60 15 75 300 Polygon -7500403 true true 90 150 270 90 90 30 Line -7500403 true 75 135 90 135 Line -7500403 true 75 45 90 45 flower false 0 Polygon -10899396 true false 135 120 165 165 180 210 180 240 150 300 165 300 195 240 195 195 165 135 Circle -7500403 true true 85 132 38 Circle -7500403 true true 130 147 38 Circle -7500403 true true 192 85 38 Circle -7500403 true true 85 40 38 Circle -7500403 true true 177 40 38 Circle -7500403 true true 177 132 38 Circle -7500403 true true 70 85 38 Circle -7500403 true true 130 25 38 Circle -7500403 true true 96 51 108 Circle -16777216 true false 113 68 74 Polygon -10899396 true false 189 233 219 188 249 173 279 188 234 218 Polygon -10899396 true false 180 255 150 210 105 210 75 240 135 240 house false 0 Rectangle -7500403 true true 45 120 255 285 Rectangle -16777216 true false 120 210 180 285 Polygon -7500403 true true 15 120 150 15 285 120 Line -16777216 false 30 120 270 120 leaf false 0 Polygon -7500403 true true 150 210 135 195 120 210 60 210 30 195 60 180 60 165 15 135 30 120 15 105 40 104 45 90 60 90 90 105 105 120 120 120 105 60 120 60 135 30 150 15 165 30 180 60 195 60 180 120 195 120 210 105 240 90 255 90 263 104 285 105 270 120 285 135 240 165 240 180 270 195 240 210 180 210 165 195 Polygon -7500403 true true 135 195 135 240 120 255 105 255 105 285 135 285 165 240 165 195 line true 0 Line -7500403 true 150 0 150 300 line half true 0 Line -7500403 true 150 0 150 150 pentagon false 0 Polygon -7500403 true true 150 15 15 120 60 285 240 285 285 120 person false 0 Circle -7500403 true true 110 5 80 Polygon -7500403 true true 105 90 120 195 90 285 105 300 135 300 150 225 165 300 195 300 210 285 180 195 195 90 Rectangle -7500403 true true 127 79 172 94 Polygon -7500403 true true 195 90 240 150 225 180 165 105 Polygon -7500403 true true 105 90 60 150 75 180 135 105 plant false 0 Rectangle -7500403 true true 135 90 165 300 Polygon -7500403 true true 135 255 90 210 45 195 75 255 135 285 Polygon 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true true 116 41 127 Circle -7500403 true true 45 90 120 Circle -7500403 true true 104 74 152 triangle false 0 Polygon -7500403 true true 150 30 15 255 285 255 triangle 2 false 0 Polygon -7500403 true true 150 30 15 255 285 255 Polygon -16777216 true false 151 99 225 223 75 224 truck false 0 Rectangle -7500403 true true 4 45 195 187 Polygon -7500403 true true 296 193 296 150 259 134 244 104 208 104 207 194 Rectangle -1 true false 195 60 195 105 Polygon -16777216 true false 238 112 252 141 219 141 218 112 Circle -16777216 true false 234 174 42 Rectangle -7500403 true true 181 185 214 194 Circle -16777216 true false 144 174 42 Circle -16777216 true false 24 174 42 Circle -7500403 false true 24 174 42 Circle -7500403 false true 144 174 42 Circle -7500403 false true 234 174 42 turtle true 0 Polygon -10899396 true false 215 204 240 233 246 254 228 266 215 252 193 210 Polygon -10899396 true false 195 90 225 75 245 75 260 89 269 108 261 124 240 105 225 105 210 105 Polygon -10899396 true false 105 90 75 75 55 75 40 89 31 108 39 124 60 105 75 105 90 105 Polygon -10899396 true false 132 85 134 64 107 51 108 17 150 2 192 18 192 52 169 65 172 87 Polygon -10899396 true false 85 204 60 233 54 254 72 266 85 252 107 210 Polygon -7500403 true true 119 75 179 75 209 101 224 135 220 225 175 261 128 261 81 224 74 135 88 99 wheel false 0 Circle -7500403 true true 3 3 294 Circle -16777216 true false 30 30 240 Line -7500403 true 150 285 150 15 Line -7500403 true 15 150 285 150 Circle -7500403 true true 120 120 60 Line -7500403 true 216 40 79 269 Line -7500403 true 40 84 269 221 Line -7500403 true 40 216 269 79 Line -7500403 true 84 40 221 269 x false 0 Polygon -7500403 true true 270 75 225 30 30 225 75 270 Polygon -7500403 true true 30 75 75 30 270 225 225 270 @#$#@#$#@ NetLogo 3.0.2 @#$#@#$#@ setup repeat 100 [ go wait 0.05 ] @#$#@#$#@ @#$#@#$#@ @#$#@#$#@