let y = [3];

let pos_x, pos_y;

let trigger;

​

function setup() {

  createCanvas(400, 400);

  x[0] = 0;

  y[0] = 0;

  x[1] = int(random(width));

  y[1] = int(random(height));

}

​

function draw() {

  background(0);

  stroke(255);

line(x[0], y[0], x[1], y[1]);

  x[2] = mouseX;

  y[2] = mouseY;

stroke(150, 0, 0);

line(x[0], y[0], x[2], y[2]);

stroke(0, 150, 0);

line(x[2], y[2], x[1], y[1]);

let distanzaPB =  sqrt(((x[2] - x[1]) *  (x[2] - x[1])) +  ((y[2] - y[1]) * (y[2] - y[1])));

let distanzaPA =  sqrt(((x[2] - x[0]) *  (x[2] - x[0])) +  ((y[2] - y[0]) * (y[2] - y[0])));

let distanzaAB =  sqrt(((x[1] - x[0]) *  (x[1] - x[0])) +  ((y[1] - y[0]) * (y[1] - y[0])));

  if ((distanzaPA + distanzaPB)  - distanzaAB <= 0.1) {

     trigger = 1;

  }

   else {

      trigger = 0;

   }

​

 print(trigger);

​

}