var y1;

var x2;

var y2;

​

​

function setup() {

  createCanvas(600, 600);

  initPoints();

}

​

function draw() {

  background(220);

  noFill();

  ellipse(x1, y1, 10, 10);

  ellipse(x2, y2, 10, 10);

  ellipse(mouseX, mouseY, 10, 10);

  line(x1, y1,mouseX, mouseY);

  line(x2, y2,mouseX, mouseY);

  var x_mag = abs(mouseX-x1);

  var y_mag = abs(mouseY-y1);

  var x_mag2 = abs(mouseX-x2);

  var y_mag2 = abs(mouseY-y2);

  var dotProduct = (x_mag * x_mag2) + (y_mag * y_mag2);

  var disOne = dist(x1, y1,mouseX, mouseY);

  var disTwo = dist(x2, y2,mouseX, mouseY);

  var angle = degrees(acos(dotProduct/(disOne * disTwo)));

  textSize(20);

  fill('black');

  text(angle, 300, 500);

}

​

function initPoints() {

  x1 = random(0, width);

  y1 = random(0, height);

  x2 = random(0, width);

  y2 = random(0, height);

​

}