cacatoo
Version:
Building, exploring, and sharing spatially structured models
130 lines (102 loc) • 4.98 kB
HTML
<html>
<script src="../../dist/cacatoo.js"></script> <!-- Include cacatoo library (compiled with rollup) -->
<script src="../../lib/all.js"></script> <!-- Load other packages -->
<link rel="shortcut icon" type="image/jpg" href="../../patterns/cacatoo.png"/>
<link rel="stylesheet" href="../../style/cacatoo.css"> <!-- Set style sheet -->
<script>
/*-----------------------Start user-defined code ---------------------*/
let sim;
var draw_cells = 1
var range_helping = 50
var strength_helping = 0.02
var range_competition = 10
var strength_competition = 0.0005
function cacatoo() {
let simconfig = {
title: "Turing patterns in population growth", // The name of your cacatoo-simulation
description: "", // And a description if you wish
maxtime: 10000, // 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: 200, // Number of columns (width of your grid)
nrow: 200, // Number of rows (height of your grid)
scale: 2, // Scale of the grid (nxn pixels per grid point)
sleep: 0,
wrap: [false,false],
fpsmeter: true
}
// FLOCKCONFIG EXAMPLE
// This example sets up a boid simulation with specific values for the currently implemented parameters
// Note however, all these parameters have defaults, so not all need to be set by the user.
let flockconfig = {
// Flock parameters
num_boids: 0, // Starting number of boids (flocking individuals)
shape: 'dot', // Shape of the boids drawn (options: bird, arrow, line, rect, dot, ant)
click: 'kill', // Clicking the boids pushes them away from the mouse
max_speed: 1, // Maximum velocity of boids
max_force: 0.2, // Maximum steering force applied to boids (separation/cohesion/alignment rules)
init_velocity:0,
friction: 0.5, // Them ants are darn slippery :)
brownian: 0.1,
// Mouse parameters
mouse_radius: 30, // Radius of boids captured by the mouse overlay
draw_mouse_radius: 'true', // Show a circle where the mouse is
draw_mouse_colour: 'blue',
// Collision behaviour
collision_force: 0.5,
size: 3, // Size of the boids (scales drawing and colision detection)
// Optimalisation (speed) parameters
qt_visible: false, // Show quadtree (optimalisation by automatically tessalating the space)
qt_capacity: 3, // 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.makeFlockmodel("flock", flockconfig) // Add a flockmodel, which contains invidiuals (boids) in continuous space
sim.reset = function(){
sim.flock.boids = []
sim.flock.populateSpot(10,sim.nr/2,sim.nc/2,10)
for(let boid of sim.flock.boids) boid.fill="blue"
}
sim.reset()
sim.createFlockDisplay("flock", {legend: true,
legendlabel: "internal resources",
strokeStyle: "white",
strokeWidth: 1,
minval:0, maxval:100, num_colours: 200, nticks:3, decimals:0})
sim.flock.update = function(){
for(let boid of this.boids) {
if(this.boids.length <= 1000) {
let numhelpers = this.getIndividualsInRange(boid.position, range_helping).length
let birthrate = numhelpers*strength_helping
if(sim.rng.random() < birthrate){
let newboid = this.copyBoid(boid)
let angle = sim.rng.random()*Math.PI*2
newboid.position.x+= 0.5*boid.size*Math.cos(angle)
newboid.position.y+= 0.5*boid.size*Math.sin(angle)
if(this.inBounds(newboid))
this.boids.push(newboid)
}
}
let numcomp = this.getIndividualsInRange(boid.position, range_competition).length
let deathrate = numcomp*strength_competition
if(sim.rng.random() < deathrate){
const index = this.boids.indexOf(boid);
this.boids.splice(index,1)
}
}
if(sim.time %50 == 0) console.log(`Simulation step ${sim.time} has ${sim.flock.boids.length} cells`)
}
sim.start()
sim.addButton("Restart", function () { sim.reset() })
sim.addSlider("range_helping",2,50,1,"Range helping")
sim.addSlider("range_competition",2,50,1,"Range killing")
}
</script>
<body onload="cacatoo()">
<div class="header" id="header">
<h2>Cacatoo </h2>
</div>
<div class="content" id="canvas_holder"></div>
<div class="content" id="form_holder"></div>
<div class="content" id="graph_holder"> </div>
<div class="footer" id="footer"></div>
</body>
</html>