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NetLogo 3.0.2 User Manual ♦ fixed bug where is−turtle? and is−agent? sometimes returned true even if the input was nobody (if a turtle died) ♦ fixed Windows−only problem where the sound extension didn't always work on some Java VM's newer than 1.4.2_05 ♦ import and export world now include the observer perspective and contents of the output area ♦ the sizing and positioning of turtle shapes in 2D, especially very small ones, is now more accurate, and more consistent cross−platform • interface fixes: ♦ right/control−clicking to pick a turtle in the 2D view is now much easier because it takes the size and position of the turtle into account ♦ removed now useless checkbox for turning off "Exact turtle positions & sizes" ♦ smaller changes in turtle heading are now visible onscreen, particularly when the patch size is large ♦ turtle sizes 1.5 and 2.0 are now accelerated graphically in the 2D view (before, only size 1.0 was accelerated) ♦ improved some error messages, and improved the pinpointing of runtime error locations ♦ you can now use the keyboard shortcuts for undo and redo when editing the code in a button or monitor ♦ fixed bug where if a chooser had lots of choices, some would disappear off the edges of the screen ♦ fixed bug where deleting a button or monitor with a syntax error halted the model ♦ in saved applets, you can now copy from an output area on all web browsers (as far as we know) ♦ fixed bug where a generated movie file could disappear when you quit NetLogo ♦ editing a slider, switch, or choice no longer halts the model (unless you change the variable name) ♦ general miscellaneous improvements to look and feel • HubNet changes: ♦ new activity: Dice Stalagmite ♦ improved activity: Beer Game Alternate 2 ♦ in computer HubNet, the "Graphics Window" tag for receiving mouse events from clients has changed to "View"; existing activities that use this feature must be updated in order to work ♦ hubnet−message−waiting? sleeps, so HubNet activities don't hog the CPU • Java API changes: ♦ controlling API can now run BehaviorSpace experiments ♦ controlling API now includes new resizeWorld(), getDrawing(), getGraphics(), halt() methods ♦ fixed bug in extensions API where the unload() method was not being called ♦ the LogoList and LogoException classes have been relocated to the org.nlogo.api package ♦ in the extensions API, the runOnce() method in the ClassManager now takes an ExtensionManager which allows the extension to specify that it uses HubNet and also to store an Object that is kept even across multiple loads of the extension • system: ♦ on Windows, bundled Java version is now 1.4.2_08 (was 1.4.2_05) 10 What's New?
Version 2.1 (December 2004) • much larger and higher quality library of turtle shapes • runs models "headless", with no GUI, from the command line • editor now highlights matching parentheses and brackets • "action keys" let buttons be triggered by keypresses • makes Quicktime movies of models • redesigned Command Center for greater usability • optional "output area" in models • greatly improved shapes editor • easy capture of images from Interface tab • multilevel "Undo" in editor • new let command for easy creation of local variables • new carefully command for trapping runtime errors • computer HubNet: ♦ substantially improved reliability ♦ "server discovery" is now fully supported ♦ you may serve multiple activities simultaneously from the same computer ♦ improved client interface and Control Center Version 2.0.2 (August 2004) • new, experimental "extensions" API lets users write new commands and reporters in Java • NetLogo can now make sounds and music; this is done with a new, experimental sound extension that is also an example of how to use the extensions API • new "controlling" API lets users control NetLogo from external Java code (such as for automating multiple runs) Version 2.0 (December 2003) NetLogo 3.0.2 User Manual • full support for Mac OS X; improved Linux support • minimum Java version is now 1.4.1; Windows 95, MacOS 8, MacOS 9 no longer supported • increased overall reliability • improved look and feel throughout the application • faster and more flexible graphics (labels, turtle sizes, exact turtle positions all now fast, reliable, and flicker−free) • suite of primitives for reading and writing external files • "strict math" mode now always on, for reproducible results • export graphics window or interface tab as image file • revamped BehaviorSpace (various improvements made; some old features are missing) • Mersenne Twister random number generator • many new primitives • computer HubNet: ♦ improved reliability; no longer alpha or beta ♦ improved graphics window mirroring features and performance What's New? 11
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Page 22 and 23: NetLogo 3.0.2 User Manual For graph
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Page 28 and 29: Version 1.3 (June 2003) • graphic
Page 30 and 31: System Requirements: Saved Applets
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Page 34 and 35: • On Mac OS X 10.2 only, opening
Page 36 and 37: NetLogo 3.0.2 User Manual 20 Contac
Page 38 and 39: 5. Press the "open" button. 6. Wait
Page 40 and 41: tolerance level, more mixed groups
Page 42 and 43: • Press the "setup" button. What
Page 44 and 45: Another type of setting is called a
Page 46 and 47: Let's experiment with the effect of
Page 48 and 49: NetLogo 3.0.2 User Manual In Wolf S
Page 50 and 51: Sample Models The Sample Models sec
Page 52 and 53: In Traffic Basic: • Press the "se
Page 54 and 55: • Choose "Turtles" from the popup
Page 56 and 57: To get a color that doesn't have it
Page 58 and 59: other way is to type inspect turtle
Page 60 and 61: NetLogo 3.0.2 User Manual 44 Tutori
Page 62 and 63: Now you have a button called 'setup
Page 64 and 65: Then add its procedure to the Proce
Page 66 and 67: The setup−patches procedure sets
Page 68 and 69: that. Write: to setup−patches ask
Page 70 and 71: Another common tool to see what's g
Page 72 and 73: in the code. Even one extra space w
Page 74 and 75: What's Next? So now you have a nice
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NetLogo 3.0.2 User Manual 60 Tutori
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Edit Tools Export Interface Save a
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The buttons in the toolbar are desc
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NetLogo 3.0.2 User Manual • The o
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Some shapes have true 3D counterpar
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NetLogo 3.0.2 User Manual To determ
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We recommend reading the Informatio
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NetLogo 3.0.2 User Manual 74 Interf
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The total number of patches is dete
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If a variable is a global variable,
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NetLogo 3.0.2 User Manual You can a
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Usually, the observer uses ask to a
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Code Example: Ask Agentset Example
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Example #3: The user has two foreve
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The Primitives Dictionary has a sec
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foreach [1 2 3] [ ask turtles [ fd
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When entering a number, the letter
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Plotting NetLogo's plotting feature
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with the set−plot−pen−interva
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Output This section is about output
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The user−choose−directory, user
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NetLogo 3.0.2 User Manual 102 Progr
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Shapes library And here are the sha
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Other buttons The "Rotate Left" and
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Historical Note Old versions of Net
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Go commands: These commands will be
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The −−experiment argument is us
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encoding than us−ascii, such as U
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Computer HubNet Activities The foll
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particular, networks that use the I
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NetLogo 3.0.2 User Manual 120 HubNe
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If you are using Computer HubNet, y
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When using Calculator HubNet the hu
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CC−WINDOW 323 339 638 459 Command
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NetLogo 3.0.2 User Manual 128 HubNe
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Just use the URL where you have sto
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as getIntegerValue(). • Throw org
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NetLogo 3.0.2 User Manual The exten
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} } } catch( java.io.IOException ex
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The two forms of runExperiment that
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succesfully use them, or run into p
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output−port−coast output−port
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set−output−port−power set−o
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play−drum play−drum drum veloci
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NetLogo 3.0.2 User Manual 17. Drawb
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• Can I use the mouse to "paint"
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Is the source code to NetLogo avail
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Will NetLogo and NetLogo 3D remain
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Can a model saved as an applet use
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• Use the freeze switch in the vi
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un across multiple computers, but y
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The NetLogo world is a torus, that
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I'm getting numbers like 0.10000000
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[ ask ? [ ... ] ] NetLogo 3.0.2 Use
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Color primitives color extract−hs
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Constants Mathematical Constants e
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If you are not sure how NetLogo wil
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eep beep Emits a beep. Note that th
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The error−message reporter can be
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color This is a built−in turtle v
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date−and−time date−and−time
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Unlike "distance−nowrap", turtles
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empty? empty? list empty? string Re
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values" (.csv) format. CSV files ca
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file−close−all file−close−a
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file−read−characters file−rea
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first first list first string On a
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Most often, globals is used to defi
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histogram−from turtles [color] ;;
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hubnet−message−source hubnet−
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Future versions of HubNet will supp
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import−world import−world filen
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is−string? is−turtle? is−turt
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left lt left number The turtle turn
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M map map [reporter] list (map [rep
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min−one−of min−one−of agent
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movie−grab−view movie−grab−
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neighbors neighbors4 Reports an age
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Note that nsum/nsum4 are equivalent
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See also patch−at. patch−ahead
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patches−own patches−own [var1 v
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plot−name plot−name Reports the
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pxcor pycor pxcor pycor These are b
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;; mean of 3.4 random−int−or−
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=> 8 show length read−from−stri
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emove−item remove−item index li
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ide ride turtle Set the perspective
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screen−edge−x screen−edge−y
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set−current−directory string Se
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• 2 (point mode): the plot pen dr
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=> [5 2 4 1 3] show shuffle [1 2 3
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startup startup User−defined proc
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that high in practice may vary from
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=> 40 If the name of a breed is sub
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The calling agent is not printed be
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show user−input "What is your nam
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while [reporter] [ commands ] If re
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show word "tur" "tle" => "turtle" w
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NetLogo 3.0.2 User Manual 256 Primi
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