jfutrell_urbance/src/netlogo/main.nlogo
;;    This file is part of URBANCE
;;
;;    Foobar is free software; you can redistribute it and/or modify
;;    it under the terms of the GNU General Public License as published by
;;    the Free Software Foundation; either version 2 of the License, or
;;    (at your option) any later version.
;;
;;    Foobar is distributed in the hope that it will be useful,
;;    but WITHOUT ANY WARRANTY; without even the implied warranty of
;;    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;;    GNU General Public License for more details.
;;
;;    You should have received a copy of the GNU General Public License
;;    along with Foobar; if not, write to the Free Software
;;    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

breed [ roadlinks link ]
breed [ nodes node ]
breed [ buildingblocks buildingblock]

turtles-own [ explored? ]
globals
[
  component-size          ;; number of roadnodes explored so far in the current component
  giant-component-size    ;; number of roadnodes in the giant component
  giant-start-node        ;; node from where we started exploring the giant component
  contour-data
  buildable-data
  heightlevel
]

;; Set up as the name implies sets up the scenario
;; It calls mainly the load-countour-data function which sets up the contour and paints
;; the apporpriate patches green
;; make-nodes , find-all-components and color-giant-component functions are related to
;; the road network generation
to setup
  ca
  setxyz 150 150 100
  set heightlevel 1
  load-contour-data
  set-default-shape turtles "circle"
  make-nodes
  find-all-components
  color-giant-component
end

;; Clear is a simple function which is similar to the setup function but unlike it does
;; not load a contour. This is helpful as a button during the development process
;; and also considering the fact that various observations could be made on a plain
;; terrain as well

to clear
  ca
  setxyz 150 150 100
  set heightlevel 1
  set-default-shape turtles "circle"
  make-nodes
  find-all-components
  color-giant-component
  ask patches with [pzcor = 0 ] [set pcolor green + (random-float 2 ) - 1]
end

;; load-contour-data uses the standard netlogo primitives for loading a file and reading
;; the data. As of now contour data is stored as [ x y z] which basically gives
;; the height of various locations (x,y)

to load-contour-data
  let file user-new-file

  ifelse ( file != false )
  [
    set contour-data []
    file-open file

    while [ not file-at-end? ]
      [ set contour-data sentence contour-data (list (list file-read file-read file-read)) ]

    user-message "Loading template file specified"
    file-close
    no-display
    foreach contour-data [ draw-contour first ? item 1 ? last ? ]
    ask patches with [pzcor = 0 ] [set pcolor green + (random-float 2 ) - 1]
    display
    user-message "Contour loading complete!"
  ]
  [ user-message "No contour file specified. Loading plain terrain"
    ask patches with [pzcor = 0 ] [set pcolor green + (random-float 2 ) - 1] ]
end

;; eventually to be replaced with the bezier curves and surfaces  this is a primitive and simple spiraling contour drawing algorithm

to draw-contour [cx cy cz]
       if ( cz >= 1 and cz < max-pycor and cx < max-pxcor - 2 and cy < max-pycor - 2 and cx > min-pxcor + 2 and cy > min-pycor + 2 )
       [
       let planstep  1
       let zstep  1
       set pcolor-of patch cx cy cz lime + (random-float 2 ) - 1
       if (( pcolor-of patch (cx - planstep) cy (cz + zstep ))  = 0 ) [ draw-contour cx - planstep cy cz - zstep ]
       if (( pcolor-of patch (cx - planstep) (cy - planstep) (cz + zstep)) = 0 ) [ draw-contour cx - planstep cy - planstep cz - zstep ]
       if (( pcolor-of patch (cx - planstep) (cy + planstep) (cz + zstep) ) = 0 ) [ draw-contour cx - planstep cy + planstep cz - zstep ]
       if (( pcolor-of patch cx (cy - planstep) (cz + zstep)) = 0 ) [ draw-contour cx cy - planstep cz - zstep ]
       if (( pcolor-of patch cx (cy + planstep) (cz + zstep)) = 0 ) [ draw-contour cx cy + planstep cz - zstep ]
       if (( pcolor-of patch (cx + planstep) (cy + planstep) (cz + zstep)) = 0 ) [ draw-contour cx + planstep cy + planstep cz - zstep ]
       if (( pcolor-of patch (cx + planstep) cy (cz + zstep)) = 0 ) [ draw-contour cx + planstep cy cz - zstep ]
       if (( pcolor-of patch (cx + planstep) (cy - planstep) (cz + zstep)) = 0 ) [ draw-contour cx + planstep cy - planstep cz - zstep ]     
       ]
end


;; nodes in this program context stands for the transportation network
   
to make-nodes
  create-nodes num-nodes
  [
    setxy random-xcor random-ycor
    set zcor 0
  ]
end

;; typical go function
;; some functions to be changed : randheighter

to go
  ;; we don't want the display to update while we're in the middle
  ;; of updating stuff, so we use no-display/display to freeze/unfreeze
  while [ (2 * count roadlinks ) <= connectedness * ( (count nodes) * (count nodes - 1) ) ]
  [
  no-display
  add-edge
  find-all-components
  color-giant-component
  ask roadlinks [ set color color-of __end1 ]  ;; recolor all edges
  ]
  display
  drawroadpatch
  user-message "Road Network Generation complete"
  ;randheighter
  ;user-message "Random Height Building Generation complete"
end

;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;; Network Exploration ;;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;

;; to find all the connected components in the network, their sizes and starting roadnodes
to find-all-components
  ask nodes [ set explored? false ]
  ;; keep exploring till all roadnodes get explored
  loop
  [
    ;; pick a node that has not yet been explored
    let start one-of nodes with [ not explored? ]
    if start = nobody [ stop ]
    ;; reset the number of roadnodes found to 0
    ;; this variable is updated each time we explore an
    ;; unexplored node.
    set component-size 0
    ;; at this stage, we recolor everything to light gray
    ask start [ explore (gray + 2) ]
    ;; the explore procedure updates the component-size variable.
    ;; so check, have we found a new giant component?
    if component-size > giant-component-size
    [
      set giant-component-size component-size
      set giant-start-node start
    ]
  ]
end

;; Finds all roadnodes reachable from this node (and recolors them)
to explore [new-color]  ;; node procedure
  if explored? [ stop ]
  set explored? true
  set component-size component-size + 1
  ;; color the node
  set color new-color
  ask __link-neighbors [ explore new-color ]
end

;; color the giant component red
to color-giant-component
  ask nodes [ set explored? false ]
  ask giant-start-node [ explore red ]
end

to add-edge
  let node1 one-of nodes
  let node2 one-of nodes
  ask node1 [
    ifelse __link-neighbor? node2 or node1 = node2
    [ add-edge ]
    [ __create-link-with node2 ]
  ]
    
end

;; Drawing the Road
;; identifies the link elements / agents and traverses along them marking the region black as of now. This leaves us
;; with the buildable green patch

to drawroadpatch

  ask roadlinks [ 
      repeat size / 2 [ fd 1
                        set pcolor black
                        ;let x xcor
                        ;let y ycor
                        ;ask patches with [ pxcor = x and pycor = y and pcolor != black ] [ set pcolor black]
                        lt 90
                        fd 1
                        set pcolor black
                        ;set x xcor
                        ;set y ycor
                        ;ask patches with [ pxcor = x and pycor = y and pcolor != black ] [ set pcolor black]
                        bk 1
                        rt 90
                      ]
      bk size / 2
      repeat size / 2 [ bk 1
                        set pcolor black
                        ;let x xcor
                        ;let y ycor
                        ;ask patches with [ pxcor = x and pycor = y and pcolor != black ] [ set pcolor black]
                        lt 90
                        fd 1
                        set pcolor black
                        ;set x xcor
                        ;set y ycor
                        ;ask patches with [ pxcor = x and pycor = y and pcolor != black ] [ set pcolor black]
                        bk 1
                        rt 90
                      ]
      jump size / 2
      ]   
end   

;; Bezier Exploits
;; Still to be finished and optimized are the bezierblend functions which would
;; eventually take the place of the countour drawing function


to-report bezierblend [ k mu n]
  let nn n
  let kn k
  let nkn n - k
  let blend 1.0
  
  while [ nn >= 1]
  [
    set blend  blend * nn
    set nn  nn - 1
    if ( kn > 1) 
      [ set blend  blend / kn
        set kn  kn - 1
      ]
    if ( nkn > 1)
      [ set blend  blend / nkn
        set nkn nkn - 1
      ]
  ]
  if ( k > 0) [ set blend  blend * ( mu ^ k )]
  if ( n - k > 0 ) [ set blend  blend * ( ( 1 - mu ) ^ ( n - k)) ]
  report blend
end

to bezierpoint
  foreach contour-data 
    [ 
      draw-contour first ? item 1 ? last ?
    ]
end


;; random height playing
;; temporary testing function for the vertical growth

to randheighter

  ;ask patches with [ pzcor = 0 ]
  ;            [ if (pcolor != black and random 3 = 1) [
  ;              let tempvar 1
  ;              repeat random 14 [ 
  ;                           ask patch pxcor pycor ( pzcor + tempvar ) [ set pcolor blue ]
  ;                           set tempvar tempvar + 1
  ;                           ]
  ;              ]
  ;           ]
  make-buildingblocks
  grow-buildingblocks
end

;; generates random building blocks into the growable patch left after the roadpatches
;; have been drawn Further modifications: Non random positioning. Affinity to nodes

to make-buildingblocks

  repeat 300 [ 
              let inputx 0
              let inputy 0
              let makeblocks 0
              ask patch-at random-xcor random-ycor 0 [
              if ( pcolor != black) [
                                    set inputx  pxcor
                                    set inputy  pycor
                                    set makeblocks 1
                                    ]
              ]
            if ( makeblocks = 1 )[ make-block inputx inputy ]
            ]
end

to make-block [inputx inputy]
  create-buildingblocks 1 [ setxy inputx inputy
                            set zcor 1
                            set shape "square"
                            set size 1
                            set color blue
                            set pcolor red]
end

;; Growth of the building blocks in the horizontal plane
to grow-buildingblocks
  ask buildingblocks [ set pcolor red]
  ask patches  with [ pzcor = 1 and pcolor = red ]
  [ paint-agents neighbors ]
  ;foreach ( patches with [ pcolor = blue ])
  ;  [ make-block pxcor pycor ]
    
end

;; Grows till all the green patch which is simply connected is filled

to grow-till-limit
  loop [
  let beforegrowth  count patches with [ pzcor = 1 and pcolor = red ]
  grow-buildingblocks
  if ( beforegrowth = count patches with [ pzcor = 1 and pcolor = red ] )
    [
      user-message "Maximum growth reached"
      stop ]
  ]
end

to paint-agents [agents]
  ask agents with [pzcor = 1 and pcolor-of  patch-at 0  0 -1 != black ][ set pcolor red ]
end

;; clears all the patches but this does not remove the block agents as such

to clear-buildingblocks
  ask patches with [ pzcor = 1 and pcolor = red ] [ set pcolor black ]
end

;; Grow-percentage function: Allowing the user to specify the amount / extent of growth
;; in the horizontal plane
to grow-percentage
end

;; Growth in the vertical plane : Eventual form would be of artificial life-sque style

to raise-blocks
  ask patches with [ pcolor = red and pzcor = heightlevel ] 
          [ 
          let rn 0;
          set rn count neighbors with [pcolor = red ]
          if ( rn > 4 )
              [ ifelse ( rn = 5 )
                        [ if( pzcor != 1 ) [ ask patch-at 0 0 -1 [set pcolor black]
                          set pcolor black ]
                        ]
                        [ ifelse ( rn = 6 )
                              [ ask patch-at 0 0 1  [set pcolor red ] ]
                              [ ifelse ( rn = 7 )
                                   [ ask patch-at 0 0 1 [set pcolor red] ]
                                   []
                              ]
                        ]
              ]
          ]
  set heightlevel heightlevel + 1
end
@#$#@#$#@
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@#$#@#$#@
WHAT IS IT?
-----------
Urbance is an agent-based approach to simulating urban systems which would thus help understand evolutionary traits in an urban scenario.


HOW IT WORKS
------------



HOW TO USE IT
-------------


THINGS TO NOTICE
----------------


THINGS TO TRY
-------------


EXTENDING THE MODEL
-------------------
This section could give some ideas of things to add or change in the procedures tab to make the model more complicated, detailed, accurate, etc.


NETLOGO FEATURES
----------------
This section could point out any especially interesting or unusual features of NetLogo that the model makes use of, particularly in the Procedures tab.  It might also point out places where workarounds were needed because of missing features.


RELATED MODELS
--------------



CREDITS AND REFERENCES
----------------------
Under Development by Dawn Thomas mentored by Dr. Rick L. Riolo of Centre for Study of  Complex Systems funded by Google Inc. under the Google Summer of Code program ( 2007 )
@#$#@#$#@
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@#$#@#$#@
NetLogo 3D Preview 4
@#$#@#$#@
@#$#@#$#@
@#$#@#$#@
<experiments>
  <experiment name="SimpleTest" repetitions="1" runMetricsEveryTick="false">
    <setup>setup</setup>
    <go>go</go>
    <metric>count turtles</metric>
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    <enumeratedValueSet variable="num-nodes">
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    <enumeratedValueSet variable="growth-percentage">
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  </experiment>
</experiments>
@#$#@#$#@
