Week 11: In-class Activity (by Taskin & Zavier)

Arduino:

 
void setup() {
	Serial.begin(9600);
	pinMode(A0, INPUT);
}

void loop() {
	Serial.println(analogRead(A0));
	delay(10);
}
 

p5:

 
let xPos = 0;

function setup() {
	createCanvas(600, 600);
	noFill();
}

function draw() {
	background(32, 64);
	
	stroke("white")

	ellipse(map(xPos, 0, 1023, 0, width), height/2, 100, 100);
	
	// Turn the screen red to make it very clear that we aren't connected to the Arduino
	if (!serialActive)
		background(128, 0, 0);
}

function keyPressed() {
	if (key == " ")
		setUpSerial(); // Start the serial connection
}

function readSerial(data) {
	if (data != null) // Ensure there's actually data
		xPos = int(data);
}			
 

Arduino:

 
void setup() {
	Serial.begin(9600);
	pinMode(3, OUTPUT);
}

void loop() {
	analogWrite(3, Serial.parseInt());
	Serial.println();
	delay(10);
}
 

p5:

 
let xPos = 0;
let LEDBrightness = 0; // 0 - 255

function setup() {
	createCanvas(600, 600);
}

function draw() {
	if (keyIsDown(UP_ARROW) && LEDBrightness < 255) LEDBrightness += 1; else if (keyIsDown(DOWN_ARROW) && LEDBrightness > 0)
		LEDBrightness -= 1;
	
	// Just a visual indicator of the brightness level on p5
	background(LEDBrightness);
	fill(LEDBrightness < 128 ? 'white' : 'black')
	text(LEDBrightness, 25, 25);
	
	// Turn the screen red to make it very clear that we aren't connected to the Arduino
	if (!serialActive)
		background(128, 0, 0);
}

function keyPressed() {
	if (key == " ")
		setUpSerial(); // Start the serial connection
}

function readSerial(data) {
	writeSerial(LEDBrightness);
}
 

Arduino:

 
const int LED_PIN = 3;
const int POT_PIN = A0;

void setup() {
	Serial.begin(9600);
	pinMode(LED_PIN, OUTPUT);
	pinMode(POT_PIN, INPUT);

	// Start the handshake
	while (Serial.available() <= 0) {
		Serial.println("0"); // Send a starting message
		delay(300); // Wait ~1/3 second
	}
}

void loop() {
	while (Serial.available()) {
		int LEDState = Serial.parseInt(); // 0 or 1
		
		if (Serial.read() == '\n') {
			digitalWrite(LED_PIN, LEDState);
			Serial.println(analogRead(POT_PIN));
		}
	}
}
 

p5:

 
let position, velocity, acceleration, gravity, wind; // vectors
let drag = 0.99, mass = 50, hasBounced = 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);
	
	textAlign(CENTER);
	textSize(18);
}

function draw() {
	background(255);
	applyForce(wind);
	applyForce(gravity);
	velocity.add(acceleration);
	velocity.mult(drag);
	position.add(velocity);
	acceleration.mult(0);
	fill(hasBounced ? 'green' : 'white')
	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 (!hasBounced && abs(velocity.y) > 1) {
			hasBounced = true;
			setTimeout(() => hasBounced = false, 100); // Set hasBounced to false after 0.1 s
		}
	}  
	
	if (!serialActive) {
		background(8);
		fill('white');
		text("Press c to connect to the Arduino", width/2, height/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 (key == ' '){
		mass = random(15,80);
		position.set(width/2, -mass);
		velocity.mult(0);
		gravity.y = 0.5*mass;
		wind.mult(0);
		
	} else if (key == 'c') {
		setUpSerial(); // Start the serial connection
	}
}

function readSerial(data) {
	if (data != null) { // Ensure there's actually data
		wind.x = map(int(data), 0, 1023, -2, 2);
		writeSerial((hasBounced ? 1 : 0) + '\n');
	}
}