let gravity;

let position;

let acceleration;

let wind;

let wmap;

let drag = 0.99;

let mass = 50;

let bounce = 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);

  // setUpSerial(); 

}

​

function draw() {

  background(255);

  wind = createVector(wmap, 0);

  // if (!serialActive) {

  //   fill(0);

  //   text("Click the mouse to select Serial Port", 20, 30);

  // } else {

  //   text("Connected", 20, 30);

  // }

  if (!serialActive) {

    text("Press p 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);

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

​

    if (position.x > width) {

      position.x = 0;

    }

​

    if (position.y > height - mass / 2) {

      if (bounce == 0) {

        bounce = 1;

      } else {

        bounce = 0;

      }

    }

​

  if (position.y > height - mass / 2) {

    velocity.y *= -1.25; // A little dampening when hitting the bottom

    position.y = height - mass / 2;

  }

}

​

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 (keyCode == LEFT_ARROW) {

    wind.x = -1;

  }

  if (keyCode == RIGHT_ARROW) {

    wind.x = 1;

  }

  if (key == " ") {

    mass = random(15, 80);

    position.y = -mass;

    velocity.mult(0);

  }

}

​

function keyPressed() {

  if (key == "p") {

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

    setUpSerial();

  }

}

​

function readSerial(data) {

  if (data != null) {

    wmap = int(data);

    console.log(wmap);

  }

​

  //////////////////////////////////

  //SEND TO ARDUINO HERE (handshake)

  //////////////////////////////////

  let sendToArduino = bounce;

  console.log("bounce " + bounce);

  writeSerial(sendToArduino);

}

​

// arduino code

​

// void setup() {

//   Serial.begin(9600);

//   pinMode(2, OUTPUT);

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

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

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

//   }

// }

// void loop() {

//   while (Serial.available() > 0) {

//     // read the incoming byte:

//     int inByte = Serial.read();

//     analogWrite(2, inByte);

//     int WindPower = analogRead(A0);

//     Serial.println(WindPower);

//   }

// }

​

​

​