JSFiddle - React, Tailwind, and code Playground

by adamholdenyall

HTML

<div id="out"></div>

JavaScript

var player = {
    x: Math.random() * 200,
    y: Math.random() * 200
};
var enemiesInRange = [];
var count = 1000000;
var range = 50;
var date = new Date();
var beforeTime = date.getTime(); 

for (var i = 0; i < count; i++) {
    var enemy = {
        x: Math.random() * 200,
        y: Math.random() * 200
    };
    var distanceToPlayerX = Math.abs(enemy.x - player.x);
    var distanceToPlayerY = Math.abs(enemy.y - player.y);
    if((distanceToPlayerX > range) || (distanceToPlayerY > range)){
        continue;
    }
    var distance = Math.sqrt(Math.pow(distanceToPlayerX,2) + Math.pow(distanceToPlayerY, 2));
    if (distance <= range) {
        enemiesInRange.push(enemy);
    }
}

var date = new Date();
var afterTime = date.getTime(); 

$("#out").text (enemiesInRange.length + " - " + (afterTime - beforeTime) + "ms");