lobo/lobo.nlogo

;; lobo: Logo Bolo
;; (c) Ben Kurtovic, 2011
;;
;; Logo Bolo is a re-envisioning of the classic tank game by Stuart Cheshire in NetLogo.
;;

;; ============
;; Declarations
;; ============

globals [
  last-tick-time
  max-fps
  mouse-was-down?
  player
  player-accelerate-for
]

breed [bullets bullet]
breed [crosshairs crosshair]
breed [tanks tank]

bullets-own [
  max-travel-distance
  speed
  travel-distance
]

tanks-own [
  acceleration
  friction
  is-accelerating?
  max-speed
  max-turn
  speed
  team
]

;; ===========================
;; Button-initiated procedures
;; ===========================

to setup
  clear-all
  no-display
  setup-defaults
  ask patches [
    set pcolor random 3
  ]
  spawn-player
  display
  no-display
  set last-tick-time timer
end

to go
  ask player [
    do-player-logic
  ]
  ask tanks [
    do-tank-logic
  ]
  ask bullets [
    do-bullet-logic
  ]
  render
  keep-time
end

to player-fire
  ask player [
    fire
  ]
end

;; ================
;; Other procedures
;; ================

to setup-defaults
  set-patch-size 30
  resize-world -8 8 -8 8
  set max-fps 30
  set mouse-was-down? false
  set player-accelerate-for 0
end

to spawn-player
  create-ordered-tanks 1 [
    set player (tank who)
    set color (get-tank-color "player")
    set acceleration 0.05
    set friction 0.01
    set is-accelerating? false
    set max-speed 0.3
    set max-turn 24
    set speed 0
    set team 0
  ]
end

to fire
  hatch-bullets 1 [
    set color white
    set size 1
    set max-travel-distance 8
    set speed 2
    set travel-distance 0
  ]
end

to do-player-logic
  if mouse-inside? [
    if mouse-down? and not mouse-was-down? [
      set player-accelerate-for player-accelerate-for + 5
      if player-accelerate-for > 30 [
        set player-accelerate-for 30
      ]
    ]
    set mouse-was-down? mouse-down?
    let old-heading heading
    facexy mouse-xcor mouse-ycor

    if subtract-headings old-heading heading > max-turn [
      set heading old-heading - max-turn
    ]
    if subtract-headings old-heading heading < 0 - max-turn [
      set heading old-heading + max-turn
    ]
  ]

  ifelse player-accelerate-for > 0 [
    set player-accelerate-for player-accelerate-for - 1
    set is-accelerating? true
  ] [
    set is-accelerating? false
  ]
end

to do-tank-logic
  if is-accelerating? [
    set speed speed + acceleration
    if speed > max-speed [
      set speed max-speed
    ]
  ]
  fd speed
  set speed speed - friction
  if speed < 0 [
    set speed 0
  ]
end

to do-bullet-logic
  fd speed
  set travel-distance travel-distance + speed
  if travel-distance > max-travel-distance [
    die 
  ]
end

to render
  display
  no-display
end

to keep-time
  let time-since-last-tick timer - last-tick-time
  let wait-time (1 / max-fps) - time-since-last-tick
  wait wait-time
  tick
  set last-tick-time timer
end

;; =================
;; Monitor reporters
;; =================

to-report player-speed
  report [speed] of player
end

;; ===============
;; Other reporters
;; ===============

to-report get-tank-color [affiliation]
  if affiliation = "player" [ report gray ]
  if affiliation = "enemy"  [ report red ]
  if affiliation = "ally"   [ report green ]
  report black
end
@#$#@#$#@
GRAPHICS-WINDOW
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MONITOR
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Player Accel Time
player-accelerate-for
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11

@#$#@#$#@
WHAT IS IT?
-----------
This section could give a general understanding of what the model is trying to show or explain.


HOW IT WORKS
------------
This section could explain what rules the agents use to create the overall behavior of the model.


HOW TO USE IT
-------------
This section could explain how to use the model, including a description of each of the items in the interface tab.


THINGS TO NOTICE
----------------
This section could give some ideas of things for the user to notice while running the model.


THINGS TO TRY
-------------
This section could give some ideas of things for the user to try to do (move sliders, switches, etc.) with the model.


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
--------------
This section could give the names of models in the NetLogo Models Library or elsewhere which are of related interest.


CREDITS AND REFERENCES
----------------------
This section could contain a reference to the model's URL on the web if it has one, as well as any other necessary credits or references.
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