Hyesop Shin_Shortest W Distance.nlogo

globals
[
  grid-x-inc               ;; the amount of patches in between two roads in the x direction
  grid-y-inc               ;; the amount of patches in between two roads in the y direction
  intersections ;; agentset containing the patches that are intersections
  roads         ;; agentset containing the patches that are roads

]

breed[people person]

patches-own
[

  father
  visited?   ; has the path been visited previously? That is,
             ; at least one path has been calculated going through this patch
  active?    ; is the patch active? That is, we have reached it, but
             ; we must consider it because its children have not been explored
  Heuristic
  step
  total-cost
  is-intersection?
]

people-own
[
  origin
  destination
  h-distance
  path

]

to setup
  clear-all
  setup-globals
  setup-patches
  setup-people
  reset-ticks
end

to setup-globals
  set grid-x-inc world-width / grid-size-x
  set grid-y-inc world-height / grid-size-y

  ask patches
  [
    set father nobody
    set visited? false
    set active? false
    set total-cost 0
  ]
end


to setup-patches
  ;; initialize the patch-owned variables and color the patches to a base-color
  ask patches [ set pcolor brown + 3 ]

  ;; initialize the global variables that hold patch agentsets
  set roads patches with
    [(floor((pxcor + max-pxcor - floor(grid-x-inc - 1)) mod grid-x-inc) = 0) or
    (floor((pycor + max-pycor) mod grid-y-inc) = 0)]
  set intersections roads with
    [(floor((pxcor + max-pxcor - floor(grid-x-inc - 1)) mod grid-x-inc) = 0) and
    (floor((pycor + max-pycor) mod grid-y-inc) = 0)]
  ask roads [ set pcolor white ]

  ask intersections [ set is-intersection? true
    ask neighbors [ set is-intersection? true ]]

end




to setup-people
    create-people 1
  [
    set shape "person"
    set size 1
    setxy random-xcor random-ycor
    set color black
    if [pcolor] of patch-here = brown + 3 [move-to one-of patches with [pcolor != brown + 3]]
    set origin patch-here
    set destination one-of patches with [pcolor != brown + 3 and is-intersection? != true]
    set h-distance distance destination
  ]

ask people [
    let current [origin] of self
    let target [destination] of self
    if target != nobody [

      ask current [
        set pcolor red
        set visited? true
        set step 0
      ]
      ask target [set pcolor green set visited? false]
    ]
  ]

  let allroads [self] of patches with [pcolor = white]
  let d one-of patches with [pcolor = green]


  foreach allroads [ road_patch ->
    ask road_patch [set Heuristic distance d]
    ]
end


to set-path

  repeat 50 [
  ask patches with [pcolor = white and pcolor != yellow] [
    if any? neighbors4 with [ pcolor = red ] or
       any? neighbors4 with [ pcolor = yellow ]
    [ set pcolor yellow
      let laststep [step] of one-of neighbors4 with [pcolor = yellow or
                                                            pcolor = red]
        ifelse [plabel] of patches != nobody [
          set step laststep + 1
          set plabel step
          set father step
          set total-cost father + heuristic
          set plabel-color black + 1][set plabel ""]
  ]]]
end


to shortest-path
  ask patches with [pcolor = red] [
  let maxsteps 0
  ask patches with [pcolor = green]
  [ let check-steps min-one-of neighbors4 with [pcolor != brown + 3 and pcolor != white][step]
    set maxsteps [step] of check-steps
  ]

  let num (range maxsteps 0 -1)
  let paths []

  foreach num [ navigation ->
  ask patches with [pcolor = green] [
    let nav-patch min-one-of neighbors4 with
        [step = navigation and pcolor != brown + 3][step]
    if nav-patch != nobody [ask nav-patch [set pcolor green set paths fput self paths]]
    ]]
  ask person 0 [set path paths]
    ]
  ask patches with [pcolor = yellow][set pcolor white set plabel ""]
end





to move

  ;if all? [destination] of people  [pcolor = green][stop]

  ask people [
    let tt [destination] of self
    let target-patch min-one-of neighbors4 with [pcolor = green and
      step > [step] of myself] [total-cost]
    ;output-print target-patch

    let target-patch2 min-one-of neighbors4 with [pcolor = green ] [total-cost]
    ;print [step] of target-patch2

    ifelse distance destination <= 1
       [ move-to destination ]
    [ ifelse target-patch != nobody
       [ move-to target-patch ]
       [ move-to target-patch2 ]
  ]


    set h-distance distance destination

  ]

  let temp []
  ask people [
    ask [neighbors4] of patch-here [
      if pcolor != brown + 3 [set temp lput self temp]
  ]]
end
@#$#@#$#@
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@#$#@#$#@
## WHAT IS IT?



## HOW IT WORKS


## HOW TO USE IT



### Buttons



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## THINGS TO NOTICE



## THINGS TO TRY



## EXTENDING THE MODEL


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NetLogo 6.0.4
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@#$#@#$#@
@#$#@#$#@
@#$#@#$#@
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