globals [acidity]

breed [sugars sugar]
breed [bacteria bacterium]

bacteria-own [
  energy
  generation-time-counter
]

to setup
  clear-all
  create-sugars initial-sugars [
    set shape "dot"
    set color white
    setxy random-xcor random-ycor
  ]
  create-bacteria 15 [
    set shape "circle 2"
    set color pink
    set energy random 100
    setxy random-xcor random-ycor
    set generation-time-counter random generation-time + 1
  ]
  set acidity 0
  reset-ticks
end

to go
  ifelse ticks > 10
  [
    ask bacteria [
      consume
      move
      divide
      expire
      set generation-time-counter generation-time-counter + 1
    ]
  ]
  [
    ask bacteria [move]
  ]
  if count bacteria = 0 [stop]
  ask sugars [
    right random 360
    forward 5
  ]
  tick
end

to consume
  if any? sugars in-radius 2 and energy < 100 [
    ask one-of sugars in-radius 2 [die]
    set energy energy + 5
    set acidity acidity + 1
  ]
end

to move
  right random 360
  forward 5
  set energy energy - 1
end

to divide
  if energy >= 100 and generation-time-counter >= generation-time [
    set energy energy / 2
    set generation-time-counter 0
    hatch 1 [right random 360 forward 1]
  ]
end

to expire
  if energy <= 0 [die]
  if random-float 1 < acidity / (500 * initial-sugars) [die]
end
@#$#@#$#@
GRAPHICS-WINDOW
240
50
677
488
-1
-1
13.0
1
10
1
1
1
0
1
1
1
-16
16
-16
16
0
0
1
ticks
30.0

BUTTON
5
25
71
58
NIL
setup
NIL
1
T
OBSERVER
NIL
NIL
NIL
NIL
1

BUTTON
85
25
148
58
NIL
go
NIL
1
T
OBSERVER
NIL
NIL
NIL
NIL
1

PLOT
15
65
215
215
Bacterial Growth Curve
time
bacterial count
0.0
10.0
0.0
10.0
true
false
"" ""
PENS
"default" 1.0 0 -2064490 true "" "plot count bacteria"

MONITOR
15
225
117
270
NIL
count bacteria
17
1
11

BUTTON
160
25
223
58
NIL
go
T
1
T
OBSERVER
NIL
NIL
NIL
NIL
1

PLOT
15
280
215
430
Log Bacterial Growth Curve
time
log bact count
0.0
10.0
0.0
1.0
true
false
"" ""
PENS
"default" 1.0 0 -2064490 true "" "plot log count bacteria 10"

MONITOR
125
225
217
270
NIL
count sugars
17
1
11

SLIDER
30
440
202
473
initial-sugars
initial-sugars
0
20000
10000.0
1000
1
NIL
HORIZONTAL

SLIDER
30
480
202
513
generation-time
generation-time
1
500
20.0
1
1
NIL
HORIZONTAL

@#$#@#$#@
## WHAT IS IT?

(a general understanding of what the model is trying to show or explain)

## HOW IT WORKS

(what rules the agents use to create the overall behavior of the model)

## HOW TO USE IT

(how to use the model, including a description of each of the items in the Interface tab)

## THINGS TO NOTICE

(suggested things for the user to notice while running the model)

## THINGS TO TRY

(suggested things for the user to try to do (move sliders, switches, etc.) with the model)

## EXTENDING THE MODEL

(suggested things to add or change in the Code tab to make the model more complicated, detailed, accurate, etc.)

## NETLOGO FEATURES

(interesting or unusual features of NetLogo that the model uses, particularly in the Code tab; or where workarounds were needed for missing features)

## RELATED MODELS

(models in the NetLogo Models Library and elsewhere which are of related interest)

## CREDITS AND REFERENCES

(a reference to the model's URL on the web if it has one, as well as any other necessary credits, citations, and links)
@#$#@#$#@
default
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airplane
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flag
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house
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leaf
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line
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line half
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pentagon
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person
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Polygon -7500403 true true 105 90 60 150 75 180 135 105

plant
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Polygon -7500403 true true 135 255 90 210 45 195 75 255 135 285
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sheep
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square
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triangle
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triangle 2
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truck
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Rectangle -7500403 true true 181 185 214 194
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Circle -7500403 false true 24 174 42
Circle -7500403 false true 144 174 42
Circle -7500403 false true 234 174 42

turtle
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wheel
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wolf
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x
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@#$#@#$#@
NetLogo 6.0.2
@#$#@#$#@
@#$#@#$#@
@#$#@#$#@
@#$#@#$#@
@#$#@#$#@
default
0.0
-0.2 0 0.0 1.0
0.0 1 1.0 0.0
0.2 0 0.0 1.0
link direction
true
0
Line -7500403 true 150 150 90 180
Line -7500403 true 150 150 210 180
@#$#@#$#@
1
@#$#@#$#@