WIP PCom project, generating sounds by gravity balls + readings for this week

ArrayList <Ball> balls = new ArrayList<Ball>();
float ballsize = 25;
float speedChange = 0.01;
boolean firstContact = false;
float boundary = 300;
int counter;
import processing.serial.*; // import the Processing serial library
Serial myPort; // The serial port


void setup() {
size(1000, 700);

String portName = Serial.list()[10];
myPort = new Serial(this, portName, 9600);
// read bytes into a buffer until you get a linefeed (ASCII 10):

void draw() {

for (int i = 0; i< balls.size() ; i++) {


for (int i=0; i < balls.size(); i++) {

// balls.get(i).beat();
if (!balls.get(i).selected) {

void serialEvent(Serial myPort) {
// read the serial buffer:
String myString = myPort.readStringUntil(‘\n’);
// if you got any bytes other than the linefeed:
if (myString != null) {

myString = trim(myString);

if (firstContact == false) {
if (myString.equals(“hello”)) {
myPort.clear(); // clear the serial port buffer
firstContact = true; // you’ve had first contact from the microcontroller
myPort.write(‘A’); // ask for more

else {
// split the string at the commas
// and convert the sections into integers:
int sensors[] = int(split(myString, ‘,’));

// print out the values you got:
for (int sensorNum = 0; sensorNum < sensors.length; sensorNum++) {
print(“Sensor ” + sensorNum + “: ” + sensors[sensorNum] + “\t”);

if (sensors.length > 0) {
ballsize = map(sensors[0], 0, 1023, 0, 99);
speedChange = map(sensors[1], 0, 1023, 0, 2);

if (sensors[2] == 1) {
counter = 0;
if(counter == 1){
balls.add(new Ball(255, 0, 0, random(0, width), 0, speedChange, ballsize, balls.size()-1));

// when you’ve parsed the data you have, ask for more:


void drawBgColor() {


fill(230, 230, 230, 80);
rect(0, 0, width, boundary);
fill(255, 255, 255, 80);
rect(0, boundary, width, 600);

rect(0, 600, width, height);

The final interface
The accelerometer changes the size, the speed and the number of the balls to generate. The simple interface is just a button. This project will be linked with sounds.

photo-3 copy 2

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