​

//handshake 

let rVal = 0;

let alpha = 255;

let left = 0;

let right = 0;

​

//adding a dimension

let yoff = 0;

​

function setup() {

  createCanvas(600, 600);

  createCanvas(windowWidth, windowHeight);

}

​

function draw() {

  translate(width / 2, height / 2);

    //rotate(PI / 2);

​

    stroke(255);

    fill(rVal, 162, 245);

    strokeWeight(1);

​

  //delta angle - each side of butterfly is PI 

  //points

    let da = PI / 150;

  //noise value

    let dx = 0.04;

  //perlin noise

    let xoff = 0;

  //butterfly wings 

    beginShape();

    for (let a = 0; a <= TWO_PI; a += da) {

      //using perlin noise to randomize the shape of butterfly

        let n = noise(xoff, yoff);

        let r = sin(2 * a) * map(n, 0, 1, 50, 300);

      //make it look like the wings are flapping

        let x = sin (frameCount*0.01) * r * cos (a);

        let y = r * sin(a);

        if (a < PI) {

            xoff += dx;

        } else {

            xoff -= dx;

        }

      //continous shape 

        vertex(x, y);

    }

    endShape();

​

  //animating the butterfly 

    yoff += 0.01;

  // if (!serialActive) {

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

  // } else {

  //   text("Connected", 20, 30);

  // }

  print(rVal);

}

  function keyPressed() {

  if (key == " ") {

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

    setUpSerial();

  }

}

​

function mousePressed() {

  if (mouseX > 0 && mouseX < windowWidth && mouseY > 0 && mouseY < windowHeight) {

    let fs = fullscreen();

    fullscreen(!fs);

  }

}

​

function windowResized() {

  resizeCanvas(windowWidth, windowHeight);

}

  function readSerial(data) {

  //READ FROM ARDUINO HERE

​

  if (data != null) {

    // make sure there is actually a message

    // split the message

    let fromArduino = split(trim(data), ",");

    // if the right length, then proceed

    if (fromArduino.length == 1) {

      // only store values here

      // do everything with those values in the main draw loop

      rVal = fromArduino[0];

      //alpha = fromArduino[1];

    }

    //SEND TO ARDUINO HERE (handshake)

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

   // let sendToArduino = left + "," + right + "\n";

    writeSerial("\n");

  }

}