HelloModel.js

import Model from '/src/Model.js'
import World from '/src/World.js'
import * as util from '/src/utils.js'

// Subclass class Model to create our new model, HelloModel
class HelloModel extends Model {
 population = 10 // number of turtles
 speed = 0.1 // step size in patch units
 wiggleAngle = 10 // wiggle angle in degrees
 linksToo = true // handy to show just turtles if false
 atEdge = 'bounce' // when turtle at edge: wrap bounce die clamp random
 startAtCenter = true

 // worldOptions: patches -16 to 16 or 33 x 33 with 0,0 origin
 constructor(worldOptions = World.defaultOptions(16)) {
 super(worldOptions)
 }

 setup() {
 // Have turtles "bounce" at the Patches edges. Default is to wrap
 this.turtles.setDefault('atEdge', this.atEdge)

 // create "population" turtles placed on random patches
 this.turtles.create(this.population, t => {
 if (!this.startAtCenter) t.moveTo(this.patches.oneOf())
 })

 // If links.too is true, create a link from every turtle to another turtle
 if (this.linksToo) {
 this.turtles.ask(t => {
 this.links.create(t, this.turtles.otherOneOf(t))
 })
 }
 }

 step() {
 // change heading randomly, moving forward by "speed"
 this.turtles.ask(t => {
 t.heading += util.randomCentered(this.wiggleAngle)
 t.forward(this.speed)
 })
 }
}

export default HelloModel