let gravity;

let position;

let acceleration;

let wind;

let drag = 0.99;

let mass = 50;

let sensorValue = 0; // Variable to store wind value from Arduino

let windStrength = 0; // Wind force determined by the sensor

​

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);

​

  // Initialize serial communication

  if (!serialActive) {

    setUpSerial();

  }

}

​

function draw() {

  background(255);

​

  // Apply gravity

  applyForce(gravity);

​

  // Apply wind (continuously updated from sensor)

  wind.x = map(sensorValue, 0, 1023, -2, 2); // Map sensor value to a stronger wind range

  applyForce(wind);

​

  // Update position and velocity

  velocity.add(acceleration);

  velocity.mult(drag);

  position.add(velocity);

  acceleration.mult(0);

​

  // Draw the ball

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

​

  // Check for bounce

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

    velocity.y *= -0.9; // A little dampening when hitting the bottom

    position.y = height - mass / 2;

​

    // Notify Arduino about the bounce

    sendBounce();

  }

}

​

function applyForce(force) {

  // Newton's 2nd law: F = M * A

  let f = p5.Vector.div(force, mass);

  acceleration.add(f);

}

​

// Notify Arduino when the ball bounces

function sendBounce() {

  if (writer) {

    writer.write('1\n'); // Send the bounce signal

  }

}

​

// Read wind control value from Arduino

function readSerial(data) {

  if (data != null) {

    // Parse the sensor value directly into a variable for wind force

    sensorValue = int(trim(data));

  }

}

​

// Handle serial setup (using the serial.js file)

function keyPressed() {

  if (key === " ") {

    setUpSerial();

  }

}

​

​

// ARDUINO CODE

​

// const int ledPin = 9;      // LED connected to pin 9

// const int sensorPin = A0;  // Analog sensor for wind control

// int sensorValue = 0;       // Variable to store sensor value from analog pin

​

// void setup() {

//   Serial.begin(9600);  // Start serial communication

//   pinMode(ledPin, OUTPUT);  // Set LED pin as output

// }

​

// void loop() {

//   // Read the sensor value and send it to p5.js

//   sensorValue = analogRead(sensorPin);

//   Serial.println(sensorValue);

​

//   // Check if a bounce signal is received

//   if (Serial.available() > 0) {

//     char command = Serial.read();

//     if (command == '1') {

//       // Turn on the LED

//       digitalWrite(ledPin, HIGH);

//       delay(100);  // Keep the LED on briefly

//       digitalWrite(ledPin, LOW);  // Turn off the LED

//     }

//   }

// }

​

​