breed [pages page] ; breed [users user] ; directed-link-breed [pagelinks pagelink ] ; directed-link-breed [uplinks uplink] users-own [impact readlist votelist reading writing erasing linking editing protecting voting age retirement active? status limp] ; ;; impact ;; readlist - list of pages which user has read ;; votelist - list of pages which user has voted ;;; ;; reading - ability te read the page ;; writing - ability to create new page ;; erasing ;; linking ;; editing ;; protecting ;; voting ;; age ;; retirement ;; active? ;; status - can be user or moderator ;; limp - length of impact pages-own [history text_size edit? protected? pro contra vote_history inlinks] ; ;; History - list of agents which has edit or create this page ;; text_size - ðàçìåð ñòðàíèöû ;; edit? ;;protected? ;; pro ;;contra ;;vote_history ;;inlinks - äëÿ ãèñòîãðàììû to setup ca set-default-shape users "person" set-default-shape pages "box" ;; Main page create-pages 1 [ set color white set text_size 2 set size text_size set history lput 0 [] ; set pro 5 ; set contra 0 set edit? true ; set text_size 1 set protected? true ; ;; set vote_history [] ] end to go if ticks >= 5000 [ stop ] if OpenWiki = true [arrival_of_user] ask users with [active? = true] [gowrite] ; ; ask pages [ move ifelse PollsShow = "Yes" [ set label se word "+" pro word "-" contra] [ set label ""] ] ask pages [set inlinks count my-in-links] ask pages with [protected? = false] [ if contra - pro > 1 [ ask users [ set impact filter [? != ([who] of myself)] impact set readlist filter [? != ([who] of myself)] readlist] ; die ] ] ; layout-spring pages links 0.4 1 1 layout-circle users (world-width / 2 - 2) ; display tick update-plot end to gowrite if age > retirement [set active? false ht stop] run one-of shuffle (se n-values reading ["read_page"] n-values writing ["write_page"] n-values editing ["edit_page"] n-values linking ["link_page"] n-values erasing [ "erase_page" ] n-values voting ["vote_page"] n-values protecting ["protect_page"] ) set age age + 1 end ;;; One of abilities to read_page let unread filter [not member? ? readlist] agency-to-list pages if not empty? unread [set readlist lput probablyfirst pages-by-out-links unread readlist ] ;; !!! â ñïèñîê ïðî÷èòàííûõ äîáàâëÿþòñÿ íîâûå â çàâèñèìîñòè îò ÷èñëà ññûëîê-âî-âíå end to write_page let my_own_preference_list [] ifelse OneVers = true ;; [set my_own_preference_list pages-by-size agency-to-list pages with [(first history) != [who] of myself ]] [set my_own_preference_list pages-by-size agency-to-list pages with [color = white]] [ set my_own_preference_list (se pages-by-size agency-to-list pages with [(first history) = [who] of myself ] reverse impact pages-by-in-links readlist ) ] if not (empty? my_own_preference_list) [ let parent_page probablyfirst my_own_preference_list hatch 1 [ set breed pages set protected? false set edit? true set text_size 1 set size text_size ; set label who set pro 0 set contra 0 set history lput [who] of myself [] ask myself [ set impact lput [who] of myself impact set readlist lput [who] of myself readlist ] move-to page parent_page create-pagelink-from page parent_page ] ] end to edit_page let my_own_preference_list (se agency-to-list pages with [(first history) = [who] of myself ] reverse impact pages-by-size readlist ) if not (empty? my_own_preference_list) [ let temp_page probablyfirst my_own_preference_list ask page temp_page [ ifelse random 4 > 0 [set text_size text_size + 0.1] [set text_size text_size - 0.1] set size text_size ;; set color [color] of myself set history lput [who] of myself history ask myself [set impact lput [who] of myself impact ] ] ] end to link_page let my_own_preference_list (se agency-to-list pages with [(first history) = [who] of myself ] reverse impact readlist) if length my_own_preference_list > 1 [ repeat length my_own_preference_list [ let A_page one-of my_own_preference_list let B_page one-of my_own_preference_list if (A_page != B_page) and not is-directed-link? pagelink A_page B_page [ask page A_page [create-pagelink-to page B_page ] stop ] ] ] end to protect_page let my_own_preference_list pages-by-votes readlist if not (empty? my_own_preference_list) [ let temp_page probablyfirst my_own_preference_list if ([pro] of page temp_page) - ([contra] of page temp_page) > VotesForProtection [ ask page temp_page [ ; set protected? true ; set label "protected" ] ] ] end ;; Óäàëåíèå ñòðàíèöû + to erase_page let my_own_preference_list pages-by-votes agency-to-list StrangePages if not (empty? my_own_preference_list) [ let er_page probablyfirst my_own_preference_list if [protected?] of page er_page = false [ ask users [ set impact filter [? != er_page] impact set readlist filter [? != er_page] readlist ] ask page er_page [ die ] ] ] end ;; Ãîëîñîâàíèå ñòðàíèöû to vote_page let my_own_preference_list pages-by-size filter [ [who] of self != first [history] of page ? ] filter [not member? ? votelist ] readlist if not (empty? my_own_preference_list) [ let vo_page probablyfirst my_own_preference_list set votelist lput vo_page votelist ifelse ;; [color] of page vo_page = 15 [color] of page vo_page < 50 ;; ([text_size] of page vo_page + [count my-in-links] of page vo_page + [pro] of page vo_page - [contra] of page vo_page) > 2 [ ask page vo_page [set pro pro + 1]] [ask page vo_page [set contra contra + 1] ] ] end ;;; Parish ;;; to arrival_of_user if count pages > random 100 [ create-users 1 [ set age 0 set color party_colors set active? true set status "user" set retirement random RetirementAge fd 1 + random max-pycor set heading random 360 set impact [] ; set readlist [] ; set votelist [] ; set reading Readability ; set writing Writability ; set linking Linkability ; set editing Editability ; set protecting Protectability ; set erasing Erasability ; set voting Votability ] ] end to invite create-users NumberOfAdmins[ set status "Administrator" set age 0 set color white set size 2 set active? true ; set retirement RetirementAge set retirement 5000 fd 1 + random max-pycor set heading random 360 set impact [] ; set readlist [] ; set votelist [] ; ;; abilities set reading Readability ; set writing Writability ; set linking Linkability ; set editing Editability ; set protecting Protectability ; set erasing Erasability ; set voting Votability ] layout-circle users (world-width / 2 - 2) end to expel ask users with [status = "Administrator"] [die] end ;;;; ;;; REPORTERS ;;;; ;; Agentset converted to the list to-report agency-to-list [agency] report [who] of agency end ;; list converted to the agentset of pages to-report list-to-pages [list1] report pages with [ member? [who] of self list1] end ;;; Ìû óìååì ïåðåâîäèòü àãåíòñòâà â ñïèñêè ;;; Ñîðòèðîâùèêè ñòðàíèö ;;; ;; ïî ðàçìåðó òåêñòà ñòðàíèöû, ïî êîëè÷åñòâó ññûëîê, ïî êîëè÷åñòâó backlinks to-report pages-by-size [list1] report sort-by [ [text_size] of page ?1 > [text_size] of page ?2] list1 end to-report pages-by-in-links [list1] report sort-by [ [count my-in-links] of page ?1 > [count my-in-links] of page ?2] list1 end to-report pages-by-out-links [list1] report sort-by [ [count my-out-links] of page ?1 > [count my-out-links] of page ?2] list1 end to-report pages-by-votes [list1] report sort-by [ [pro] of page ?1 - [contra] of page ?1 > [pro] of page ?2 - [contra] of page ?2 ] list1 end to-report party_colors report one-of [15 25 45 55 65 75 85 95 105 125 ] ;; end ;;; ;;;; to-report probablyfirst [list1] if empty? bf list1 [ report first list1 ] if random 2 > 0 [report first list1] set list1 but-first list1 report probablyfirst list1 end to-report DeadendPages ;; The following pages do not link to other pages report pages with [count my-out-links = 0] end to-report LonelyPages ;; The following pages are not linked from or transcluded into other pages report pages with [count my-in-links = 0] end to-report StrangePages ;; The following pages are not linked from or do not link to other pages report (turtle-set DeadendPages LonelyPages) end ;;;;;;; ;;;;; Layout ;;;;; to collab_diagram ask pagelinks [hide-link] ask users [ foreach impact [ ifelse is-link? uplink who ? [ask uplink who ? [set thickness thickness + 0.05]] [create-uplink-to page ? ;; ask uplink who ? [set color red] ] ] ] ;; ask uplinks [set color white] repeat 70 [layout-spring (turtle-set users pages) uplinks 0.2 5 1 ] end to restore_wiki ask uplinks [die] ask pagelinks [show-link] repeat 70 [layout-spring pages pagelinks 0.2 5 1 ] end ;;;;;;;;;;;;;;;;;;;;;;; ;;; Plotting ;;; ;;;;;;;;;;;;;;;;;;;;;;; to update-plot if count pages > 2 [ set-current-plot "Statistic" set-plot-y-range 0 1 + count pages set-current-plot-pen "links" plot count pagelinks set-current-plot-pen "a_users" plot count users with [active? = true] set-current-plot-pen "pages" plot count pages set-current-plot-pen "articles" plot count pages with [count my-out-links > 0 ] ] ;; set-current-plot "InLinksHystogram" clear-plot if count pages > 0 [ ;; set-plot-x-range 0 count pages set-plot-y-range 0 1 + [inlinks] of max-one-of pages [inlinks] ] histogram [inlinks] of pages ;;; Ðàñïðåäåëåíèå ïî impacts ask users [set limp length impact] set-current-plot "UsersImpacts" set-current-plot-pen "impact" clear-plot if count users > 1 [ ; set-plot-y-range 0 1 + length [impact] of max-one-of users [limp] set-plot-y-range 0 10 set-plot-x-range 0 count users ;; set-histogram-num-bars count users ] histogram [limp] of users end @#$#@#$#@ GRAPHICS-WINDOW 362 15 853 527 18 18 13.0 1 10 1 1 1 0 1 1 1 -18 18 -18 18 0 0 1 ticks BUTTON 58 13 121 46 NIL setup NIL 1 T OBSERVER NIL NIL NIL NIL BUTTON 57 49 120 82 NIL go T 1 T OBSERVER NIL NIL NIL NIL SLIDER 24 487 203 520 NumberOfAdmins NumberOfAdmins 1 24 1 1 1 NIL HORIZONTAL SLIDER 156 120 328 153 Writability Writability 0 10 5 1 1 NIL HORIZONTAL SLIDER 157 160 329 193 Editability Editability 0 10 0 1 1 NIL HORIZONTAL SLIDER 156 197 328 230 Linkability Linkability 0 10 0 1 1 NIL HORIZONTAL BUTTON 19 453 126 486 Invite Admins invite NIL 1 T OBSERVER NIL NIL NIL NIL SLIDER 161 369 333 402 Protectability Protectability 0 10 0 1 1 NIL HORIZONTAL SLIDER 160 405 332 438 Erasability Erasability 0 10 0 1 1 NIL HORIZONTAL SLIDER 155 291 327 324 RetirementAge RetirementAge 50 5000 2667 1 1 NIL HORIZONTAL SLIDER 155 325 327 358 VotesForProtection VotesForProtection 0 10 1 1 1 NIL HORIZONTAL BUTTON 128 453 227 486 Expel Admins expel NIL 1 T OBSERVER NIL NIL NIL NIL SLIDER 157 237 329 270 Votability Votability 0 10 0 1 1 NIL HORIZONTAL PLOT 861 16 1132 146 Statistic NIL NIL 0.0 10.0 0.0 10.0 true true PENS "pages" 1.0 0 -10899396 true "a_users" 1.0 0 -2674135 true "links" 1.0 0 -13791810 true "articles" 1.0 0 -6459832 true SLIDER 156 82 328 115 Readability Readability 0 10 1 1 1 NIL HORIZONTAL SWITCH 185 10 293 43 OpenWiki OpenWiki 0 1 -1000 BUTTON 33 216 137 249 Collaboration collab_diagram NIL 1 T OBSERVER NIL NIL NIL NIL PLOT 861 353 1157 526 UsersImpacts length of impact numbersOfUsers 1.0 5.0 0.0 5.0 true false PENS "Impact" 1.0 1 -2674135 true PLOT 863 158 1147 329 InLinksHystogram LinksPerPage NumbersOfPages 1.0 10.0 0.0 10.0 true true PENS "Links" 1.0 1 -16777216 false BUTTON 49 267 124 300 Restore restore_wiki NIL 1 T OBSERVER NIL NIL NIL NIL SWITCH 223 492 342 525 OneVers OneVers 1 1 -1000 @#$#@#$#@ WHAT IS IT? ----------- Wikis are collaborative platforms for text creation. The original idea of hypertext, expressed by V.Bush, D.Engelbart and T.Bernes-Lee treated it as an extension not only of individual, but of collective capabilities. Wiki is a simple and radical instance of a collective hypertext, in which every community member can create and edit pages. Wikis are often referred to as tools for conducting collective activities. Wiki philosophy implies aiming the efforts of the whole group at creating a collective final product. A group of wiki users can elaborate a collective hypertext and not bother with maintaining links. Usually wikis are regarded as encyclopedias consisting of multiple interconnected entries or as a multi-agent network community. In this paper we refer to wikis as ecological systems which consist of multiple human and programmed agents, following certain rules and an environment of various objects, pages, templates and categories and links between them. All the elements of the wiki environments can be reused. The transclusion mechanism allows to use wikis as building blocks and construct complicated metabolic chains. Well known wiki examples are collections of entries created by the community and are indicative examples of ecological systems. HOW IT WORKS ------------ The model is based on three simple rules. • The system contains only participants, pages and links. • Participants can act over pages. • All participants’ actions over the pages are recorded and used for the wiki system dynamics analysis. Participants possess the following properties: Age and status. Every participant has an age which is equal to 0 at his birth. At every cycle it increases by 1. He also possesses a “retirement” property on achieving which he leaves the system. When the age overpasses retirement, the participant ceases his actions. Every participant has a “status” which can be a user or an administrator. Administrators are painted white, they are larger, they never retire. Every participant has active? property. If a participant becomes older than the retirement age his active? status is switched to “false”. Each participant can be connected to several lists: impact – is a list which allows to find all pages edited by the participant. readlist – is a list of pages read by the author. votelist – is a list of pages for which the participant voted. Each participant can vote for a page only once. He can not vote for the pages which he has created himself. Each participant has the following abilities: • The ability to read pages. After the agent has read a page, it can link it to other pages, grow other pages from it and link it to other pages. • The ability to create new pages. A participant creates his page, writes its ID number to his impact list and writes his ID to the page history. The new page receives a directed pagelink from the parent page. • The ability to edit existing pages. A participant changes the “size” property of the page, adds its ID to his impact list and adds his ID to the history of the page edits. • The ability to link pages. A participant creates a directed link between pages. One page becomes a parent, the other becomes an offspring. • The ability to evaluate pages. A participant can evaluate pages, created by other participants and read by him. Pages can have their own properties inside the system. • History is a list of edits and participants who edited the page. • Page links to the page and from the page. Two types of directed links are maintained in the system: • Pagelinks are links between pages, established at the creation of a page and as a result of linking two existing pages. • Uplinks are pages between participants and pages. These links are created as a result of the system analysis. For creating those links “Collaboration” button is used. Uplinks may vary in thickness, which depends on the contribution of the participant to editing the page. HOW TO USE IT ------------- The setup button clears off all the content from the system and creates the initial page, protected from erasing. It is a size 2 white page. The On/Off switch controls the OpenWiki variable. The system can be closed. In this case all the content is published by the administrator. The system can be open. In this case new users can come and create new pages. Sliders control abilities of the participants. • reading is the ability to read pages • writing is the ability to write pages • linking is the ability to link pages • editing is the ability to edit pages • voting is the ability to vote for and against pages • erasing - is the ability to delete pages • protecting - is the ability to protect THINGS TO NOTICE ---------------- Collaboration button creates a graph, connecting participants and pages which they edited. Links between pages are hidden. The thickness of the page depends on the number of edits that the participant made THINGS TO TRY ------------- Set On/Off OpenWiki to Off. Run it with a small number of administrators (like 5) and watch the plot and hystograms. Then Set On/Off OpenWiki to On and watch the plot. EXTENDING THE MODEL ------------------- More sliders and hystograms can be added for wiki-system analysis. NETLOGO FEATURES ---------------- Both users and pages are turtles. Pagelinks and uplinks are links. Lists are used heavily in this model. Each page maintains a list of its editors. Each users maintains a list of pages he has edit. nodes. RELATED MODELS -------------- See other models in the Networks section of the Models Library, such as Preferential Attachment. CREDITS AND REFERENCES ---------------------- This model is based on http://letopisi.ru experience @#$#@#$#@ 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 -7500403 true true 165 255 210 210 255 195 225 255 165 285 Polygon -7500403 true true 135 180 90 135 45 120 75 180 135 210 Polygon -7500403 true true 165 180 165 210 225 180 255 120 210 135 Polygon -7500403 true true 135 105 90 60 45 45 75 105 135 135 Polygon -7500403 true true 165 105 165 135 225 105 255 45 210 60 Polygon -7500403 true true 135 90 120 45 150 15 180 45 165 90 sheep false 0 Rectangle -7500403 true true 151 225 180 285 Rectangle -7500403 true true 47 225 75 285 Rectangle -7500403 true true 15 75 210 225 Circle -7500403 true true 135 75 150 Circle -16777216 true false 165 76 116 square false 0 Rectangle -7500403 true true 30 30 270 270 square 2 false 0 Rectangle -7500403 true true 30 30 270 270 Rectangle -16777216 true false 60 60 240 240 star false 0 Polygon -7500403 true true 151 1 185 108 298 108 207 175 242 282 151 216 59 282 94 175 3 108 116 108 target false 0 Circle -7500403 true true 0 0 300 Circle -16777216 true false 30 30 240 Circle -7500403 true true 60 60 180 Circle -16777216 true false 90 90 120 Circle -7500403 true true 120 120 60 tree false 0 Circle -7500403 true true 118 3 94 Rectangle -6459832 true false 120 195 180 300 Circle -7500403 true true 65 21 108 Circle -7500403 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 4.1.2 @#$#@#$#@ @#$#@#$#@ @#$#@#$#@ @#$#@#$#@ @#$#@#$#@ default 0.0 -0.2 0 1.0 0.0 0.0 1 1.0 0.0 0.2 0 1.0 0.0 link direction true 0 Line -7500403 true 150 150 90 180 Line -7500403 true 150 150 210 180 @#$#@#$#@ 0 @#$#@#$#@