let led;

let velocity;

let gravity;

let position;

let acceleration;

let wind;

let drag = 0.99;

let mass = 50;

​

function setup() {

  createCanvas(640, 360);

  noFill();

  position = createVector(width/2, 0);

  velocity = createVector(0,0);

  acceleration = createVector(0,0);

  gravity = createVector(0, 0.5*mass);

  wind = createVector(0,0);

}

​

function draw() {

  background(255);

  applyForce(wind);

  applyForce(gravity);

  velocity.add(acceleration);

  velocity.mult(drag);

  position.add(velocity);

  acceleration.mult(0);

  ellipse(position.x,position.y,mass,mass);

  if (position.y > height-mass/2) {

      velocity.y *= -0.9;  // A little dampening when hitting the bottom

      position.y = height-mass/2;

    if(serialActive){

      writeSerial("bounced\n");

    }

    }

  // Check for collisions with the left wall

  if (position.x < mass / 2) {

    velocity.x =0; // Reverse horizontal velocity (bounce)

    position.x = mass / 2; // Correct position

  }

​

  // Check for collisions with the right wall

  if (position.x > width - mass / 2) {

    velocity.x =0; // Reverse horizontal velocity (bounce)

    position.x = width - mass / 2; // Correct position

  }

}

​

function applyForce(force){

  // Newton's 2nd law: F = M * A

  // or A = F / M

  let f = p5.Vector.div(force, mass);

  acceleration.add(f);

}

​

​

​

​

function keyPressed() {

  if (key == " ") {

    // important to have in order to start the serial connection!!

    setUpSerial();

  }

  if (keyCode==DOWN_ARROW){

    //mass=random(15,80);

    position.y=-mass;

    velocity.mult(0);

  }

}

​

​

function readSerial(data){

  if (data != null){

    wind.x=int(data);

    console.log("working");

​

  }

}

​