cacatoo
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Building, exploring, and sharing spatially structured models
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/*-----------------------Start user-defined code ---------------------*/
// Aapjes is a simulations where "aapjes" (Dutch for monkeys) are roaming
// around for food. When a monkey is too far from the group, it will get
// scared and run back to the group. Otherwise, it can run into a random
// direction looking for fruit. When it has found a certain number of fruit
// items, the monkey will stand still and eat the fruit. Only after the
// monkey is done eating will it run back to the group. Interestingly,
// the parameter "time spent eating" helps the group find more food!
let sim;
var time_spent_eating = 0
function cacatoo() {
let simconfig = {
title: "Aapjes", // The name of your cacatoo-simulation
description: "Foraging in groups", // And a description if you wish
maxtime: 50000, // How many time steps the model continues to run
// (note, the onscreen FPS may drop below 60 fps when using fast mode, although many more timesteps may be handled per second)
ncol: 300, // Number of columns (width of your grid)
nrow: 300, // Number of rows (height of your grid)
scale: 2, // Scale of the grid (nxn pixels per grid point)
sleep: 0,
seed: 2,
wrap: [true,true],
fpsmeter: true,
statecolours: {
'type': {
'grass': '#14782f',
'fruit': '#DDDD00'
}
},
}
let flockconfig = {
// Flock parameters
num_boids: 0, // Starting number of boids (flocking individuals)
shape: 'png', // Shape of the boids drawn (options: bird, arrow, line, rect, dot, ant)
click: 'none',
max_speed: 1, // Maximum velocity of boids
max_force: 0.1, // Maximum steering force applied to boids (separation/cohesion/alignment rules)
friction: 0.0, // Frictionless monkeys, ofc
// Mouse parameters
mouse_radius: 30, // Radius of boids captured by the mouse overlay
draw_mouse_radius: true, // Show a circle where the mouse is
// Steering behaviour
alignment: {strength:0, radius:30}, // Alignment parameters (uses default neighbour radius of 30)
cohesion: {strength:0, radius:50}, // Cohesion parameters (uses default neighbour radius of 30)
separation:{strength:0, radius:4}, // Separation radius is smaller
size: 20, // Size of the boids (scales drawing and colision detection)
// Optimalisation (speed) parameters
//qt_colour: 'white', // Show quadtree (optimalisation by automatically tessalating the space)
qt_capacity: 5, // How many boids can be in one subspace of the quadtree before it is divided further
}
sim = new Simulation(simconfig) // Initialise the Cacatoo simulation
sim.makeGridmodel("biome") // Initialise a gridmodel where the fruit will be
sim.initialGrid(sim.biome, 'type', 'grass', 'fruit', 0.15)
sim.addPatches = function(){
for(let i=0; i<10;i++){
sim.initialSpot(sim.biome, 'type', 'fruit', 100, Math.floor(sim.rng.random()*sim.ncol), Math.floor(sim.rng.random()*sim.nrow),background_state=false)
}
}
sim.createGridDisplay("biome", "type", "")
sim.makeFlockmodel("flock", flockconfig) // Add a flockmodel, which contains invidiuals (boids) in continuous space
sim.createFlockDisplay("flock",{addToDisplay:sim.canvases[0]}) // Alias for old 'createDisplay' function, makes distinction with new flocks clearer
sim.flock.populateSpot(50,sim.nrow/2,sim.ncol/2,1)
for(boid of sim.flock.boids) {
boid.png = "images/aapje_normal.png"
boid.velocity.x = sim.rng.random()*2-1
boid.velocity.y = sim.rng.random()*2-1
boid.food = 0
}
/*
2. DEFINING THE RULES. Below, the user defines the nextState function. This function will be applied for each grid point when we will update the grid later.
*/
sim.biome.nextState = function(x, y) {
}
sim.biome.update = function() {
this.synchronous() // Applied as many times as it can in 1/60th of a second
}
let food_gathered = 0
sim.flock.update = function(){
let i = 0
for(let boid of this.boids) {
if(boid.food>=10){ // If the monkey has food, lock it in space and set a different icon
boid.locked = true
boid.png = "images/aapje_eating.png"
}
if(boid.locked){
boid.food -= (1/time_spent_eating)
if(boid.food <= 0) {
boid.locked=false
boid.png = "images/aapje_normal.png"
}
else continue // Eating monkeys are not scared
}
for(let i of sim.flock.getNearbyGridpoints(boid,sim.biome,8)){
if(i.type == 'fruit') {
boid.food++
food_gathered++
i.type = 'grass'
}
}
//boid.velocity = this.rotateVector(boid.velocity,*sim.rng.random()-7.5)
let numneighs = this.getIndividualsInRange(boid.position, 20).length -1
if(numneighs < 10) {
boid.cohesionstrength = 1.0
boid.png = "images/aapje_scared.png"
}
else {
boid.cohesionstrength = 0.0
boid.png = "images/aapje_normal.png"
}
}
this.plotArray(["Total fruit gathered"], [food_gathered],
["gold"], "Total fruit gathered")
}
sim.start()
sim.addSlider("time_spent_eating",0,100,1,"Time spent eating")
sim.addButton("pause/continue", function () { sim.toggle_play() })
sim.addButton("step", function () { sim.step(); sim.display() })
sim.addButton("add patches", sim.addPatches)
sim.addHTML("form_holder","<br>")
}
</script>
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<h1 class="page-title"><a href="https://github.com/bramvandijk88/cacatoo"><img src="images/elephant_cacatoo_small.png"></a> <b>Aapjes (monkeys)</b> </img></h1>
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