let gravity;

let position;

let acceleration;

let wind;

let drag = 0.99;

let mass = 50;

let led = 0;

​

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(position.y == height-mass/2 && (velocity.y > 0.5 || velocity.y < -0.5)){ 

    led = 1;

  }else{

    led = 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 keyPressed(){

  if (key == "n") {

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

    setUpSerial();

  }

  if (key==' '){

    mass=random(15, 80);

    position.y=-mass;

    velocity.mult(0);

  }

}

​

function readSerial(data) {

​

  if (data != null) {

    // make sure there is actually a message

    // split the message

    wind.x = data;

​

    //////////////////////////////////

    //SEND TO ARDUINO HERE (handshake)

    //////////////////////////////////

    let sendToArduino = led + "\n";

    writeSerial(sendToArduino);

  }

}

​

///Arduino COde

​

/*

​

int ledPin = 9;

​

void setup() {

  // Start serial communication so we can send data

  // over the USB connection to our p5js sketch

  Serial.begin(9600);

  pinMode(ledPin, OUTPUT);

}

​

void loop() {

  int sensor = analogRead(A0);

  int wind = map(sensor, 0, 1023, -2, 2);

  Serial.println(wind);

  delay(10);

  if (Serial.available() > 0) {

    // Read the brightness value from p5.js

    int touch = Serial.parseInt();

    // Set the LED brightness

    digitalWrite(ledPin, touch);

  }

}

*/