let gravity;

let position;

let acceleration;

let wind;

let drag = 0.99;

let mass = 50;

let windSpeed;

let LEDbrightness=false;

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);

  if (!serialActive) {

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

  } else {

    text("Connected", 20, 30);

  }

  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;

      LEDbrightness=1;

    }

  else{

  LEDbrightness=0;

  }

  if(windSpeed<500){

  wind.x=-1;

  }

  else if(windSpeed>700){

    wind.x=1;

  }

  else{

    wind.x=0;

  }

  print(windSpeed);

}

​

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==' '){

    mass=random(15,80);

    position.y=-mass;

    velocity.mult(0);

  }

  if(keyCode==RIGHT_ARROW){

  setUpSerial();

  }

}

​

function readSerial(data) {

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

  //READ FROM ARDUINO HERE

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

​

  if (data != null) {

    windSpeed=data;

    }

​

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

    //SEND TO ARDUINO HERE (handshake)

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

    let sendToArduino = LEDbrightness+"\n";

    writeSerial(sendToArduino);

}

​

//Arudino Code

/*

void setup() {

  Serial.begin(9600);

  pinMode(2, OUTPUT);

  // start the handshake

  while (Serial.available() <= 0) {

    Serial.println("0,0"); // send a starting message

    delay(300);            // wait 1/3 second

  }

}

​

void loop() {

  // wait for data from p5 before doing something

  while (Serial.available()) {

    int LEDstate = Serial.parseInt();

      digitalWrite(2, LEDstate);

      int sensor=analogRead(A0);

      Serial.println(sensor);

  }

}

*/

​

​