// Random Distribution Bell Curve
// With 2 Random Distributions in
// a Cartesian Coordinate View
// by John Clavin - April 2, 2017

var dots_X = [];
var PolarDots = [];
var numOfDots = 200;
var bellHeight = 151;
var loopCount = 0;

function setup() {
  createCanvas(600, 600);
  noStroke();
  background(176);
  for (var a = 0; a < numOfDots; a++) {
    var aa = new PolarDot();
    PolarDots.push(aa);
  }
  for (var b = 0; b < numOfDots; b++) {
    dots_X[b] = 0;
  }
}

function draw() {
  background(176, 8);
  var i;
  for (i = 0; i < 200; i++) {
    calculate_X(flipCoin());
  }
  for (i = 0; i < 140; i++) {
    var k = PolarDots[i];
    k.calcX_point(flipCoin());
    k.calcY_point(flipCoin());
  }
  for (i = 0; i < numOfDots; i++) {
    fill(0);
    ellipse(i * 3, height - dots_X[i], 3, 3);
  }
  for (i = 0; i < numOfDots; i++) {
    var j = PolarDots[i];
    fill(254);
    ellipse(j.xLocation * 3, j.yLocation * 3, 3, 3);
  }
  if (loopCount < bellHeight) {
    loopCount++;
  } else {
    noLoop();
  }
}

function calculate_X(hds) {
  var heads = hds;
  var xLocation;
  xLocation = heads - 900; // adjust to window
  dots_X[xLocation] += 1;
}

function flipCoin() {
  var rand;
  var headCount = 0;
  for (var c = 0; c < 2000; c++) {
    rand = random(1000);
    if (rand >= 500) {
      headCount += 1;
    }
  }
  return headCount;
}

function PolarDot() {
  this.xLocation;
  this.yLocation;
  
  this.calcX_point = function(hds) {
    this.heads = hds;
    this.xLocation = this.heads - 900;
  }
  this.calcY_point = function(hds) {
    this.heads = hds;
    this.yLocation = this.heads - 900;
  }
}