Predator Prey

// Define some constants

const ANT_COUNT = 1000;

const FOOD_COUNT = 100;

const PRED_COUNT = 1;

​

// Define arrays to hold ants and food

let ants = [];

let food = [];

let preds = [];

​

// Define a hill object

let hill = {

  x: 200,

  y: 200,

  diameter: 50,

  foodCount: 0,

  display: function() {

    fill(0, 100, 0);

    stroke(0, 255, 0);

    ellipse(this.x, this.y, this.diameter);

    noStroke();

    fill(255);

    textSize(16);

    text("Food: " + this.foodCount, this.x - this.diameter / 2, this.y + this.diameter / 2 + 20);

  }

};

​

function setup() {

  createCanvas(1000, 800);

  // Create ants

  for (let i = 0; i < ANT_COUNT; i++) {

    let ant = new Ant(hill.x, hill.y, hill);

    ants.push(ant);

  }

  // Create food

  for (let i = 0; i < FOOD_COUNT; i++) {

    food.push(new Food(random(width), random(height)));

  }

  for (let i = 0; i < PRED_COUNT; i++) {

    let pred = new Predator(random(width), random(height));

    preds.push(pred);

  }

}

​

function draw() {

  background(255);

  // Display the hill

  hill.display();

  // Move and display ants

  for (let ant of ants) {

    ant.move();

    ant.display();

    ant.live();

    if(!ant.living){

      ants.splice(ants.indexOf(ant), 1);

    }

  }

  for (let pred of preds) {

    pred.move();

    pred.display();

    pred.live();

    if(!pred.living){

      preds.splice(preds.indexOf(pred), 1);

    }

  }

  // Display food

  for (let f of food) {

    f.display();

  }

  if(food.length < 50){

    for (let i = 0; i < abs(random(50,200)); i++) {

    food.push(new Food(random(width), random(height)));

    }

  } 

}