let enemyPadding = 5;

​

// config ^

​

let triesPerRadius = 2;

let enemySize = 10;

let searchRadiusInterval = 3;

let startingSearchRadius = 5;

let tryIncrease = 5;

​

let searchRadius = startingSearchRadius;

let tryCount = 0;

​

let enemies = [];

​

let slider;

​

function setup() {

  createCanvas(400, 400);

  noStroke();

  angleMode(DEGREES);

  rectMode(CENTER);

}

​

function draw() {

  update();

  background(220);

  push();

  translate(width/2, height/2);

  fill(255, 0, 0, 50);

  if (enemies.length < targetEnemyCount) ellipse(0, 0, searchRadius*2);

​

  fill(255, 0, 0);

  for (let i = 0; i < enemies.length; i++) {

    let enemy = enemies[i];

    ellipse(enemy.x, enemy.y, enemySize);

  }

  pop();

}

​

function update() {

  if (enemies.length == targetEnemyCount) return;

  let attempt = createVector(searchRadius, 0);

  attempt.setHeading(random(360));

  if (isViablePlacement(attempt)) addEnemy(attempt);

  tryCount++;

  if (tryCount >= triesPerRadius) {

    tryCount = 0;

    searchRadius += searchRadiusInterval;

    triesPerRadius += tryIncrease;

  } 

}

function addEnemy(attempt) {

  enemies.push({x:attempt.x, y:attempt.y});

}

​

function isViablePlacement(attempt) {

  let viable = true;

  for (let i = 0; i < enemies.length; i++) {

    let enemy = enemies[i];

    let distance = dist(attempt.x, attempt.y, enemy.x, enemy.y);

    if (distance < enemySize + enemyPadding) {

      viable = false;

      break;

    }

  }

  if (viable) return true;

}

​