let gravity;

let position;

let acceleration;

let wind;

let drag = 0.99;

let mass = 50;

let LED_value; 

​

function setup() {

  createCanvas(840, 560);

  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);

  if (!serialActive) {

    fill(0,0,0);

    textSize(20);

    text("Press Space Bar to select Serial Port", 20, 30);

  } else {

    text("Connected", 20, 30);

    applyForce(wind);

    applyForce(gravity);

    velocity.add(acceleration);

    velocity.mult(drag);

    position.add(velocity);

    acceleration.mult(0);

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

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

    }

    else if (position.x < mass/2){

      velocity.x *= -0.9;

      position.x = mass / 2;

      ellipse(mass/2,position.y,mass,mass);

    }

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

      velocity.x *= -0.9;

      position.x = width - mass / 2;

      ellipse(width - mass/2,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;

    }

    LED_value = (position.y == height - mass/2) ? 1: 0; 

  }

}

​

function keyPressed() {

  if (key === " ") {

    setUpSerial();  // Initiate serial connection when spacebar is pressed

  }

    if (key=='m'){ // mass

    mass=random(15,80);

    position.y=-mass;

    velocity.mult(0);

  }

}

​

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 readSerial(data) {

  if (data) {

    let fromArduino = int(map(int(data), 0, 1023, -3, 3));  // Adjust the scale for smoother wind force

​

    // Gradually adjust the wind.x force with lerp

    let targetWindX = fromArduino * 0.5;  // Scale down wind force for smoother effect

    wind.x = lerp(wind.x, targetWindX, 0.1);  // Smoothly adjust wind

​

    let sendToArduino = `${LED_value}\n`;

    console.log(fromArduino, sendToArduino);

    writeSerial(sendToArduino);  // Send control data to Arduino

  }

}