Making a Game With Arduino and Processing - arduino

Question

I am trying to form a two player game which requires an audio reflex to a visual. by using littebits sound trigger for sound input and littbits arduino to connect it to the computer. But I am new to this and don't know how to connect arduino to processing and use the input from sound trigger to effect the score when a black square appears.
here is my code in processing and a sample arduino code I have taken from littlebits website and tried to modify a little.
thanks in advance!
float dice;
int playerOne = 0; //player 1 score (left paddle)
int playerTwo = 0; //player 2 score (right paddle)
boolean oneWins = false;
boolean twoWins = false;
void setup(){
size(500, 500);
smooth();
noStroke();
frameRate(2.5);
}
void draw() {
background(255);
showGUI();
dice = random(0, 3);
if (dice < 1.000001 && dice > 0.1){
fill ((0), (255), (0));
ellipse (250,250,100,100);
} else if (dice < 2.000001 && dice > 1.000001){
rectMode(RADIUS);
fill ((255), (0), (0));
rect (250,250,50,50);
} else if (dice < 3.000000 && dice > 1.000000){
rectMode(RADIUS);
fill ((0), (0), (255));
rect (250,250,50,50);
} else if (dice < 0.1){
rectMode(RADIUS);
fill(0);
rect(250,250,50,50);
}
}
----------arduino------
void setup() {
Serial.begin(9600); //Establish rate of Serial communication
establishContact(); //See function below
}
void loop() {
if (Serial.available() > 0) {
int inByte = Serial.read();
int leftTrigger = analogRead(A0);
Serial.print(leftTrigger, DEC);
Serial.print(",");
int rightTrigger = analogRead(A1);
Serial.println(rightTrigger, DEC);
}
}
void establishContact() {
while (Serial.available() <= 0) {
Serial.println("hello");
delay(300);
}
}

Answer 1

You need two pieces of code for this to work: one on the Arduino that sends commands, and one for Processing to receive and parse those commands.
I haven't used the littlebits modules, but here's a button example from this very detailed tutorial.
Arduino code:
int switchPin = 4; // switch connected to pin 4
void setup() {
pinMode(switchPin, INPUT); // set pin 0 as an input
Serial.begin(9600); // start serial communication at 9600bps
}
void loop() {
if (digitalRead(switchPin) == HIGH) { // if switch is ON,
Serial.print(1, BYTE); // send 1 to Processing
} else { // if the switch is not ON,
Serial.print(0, BYTE); // send 0 to Processing
}
delay(100); // wait 100 milliseconds
}
And the matching Processing code:
import processing.serial.*;
Serial port; // create object from Serial class
int val; // data received from the serial port
void setup() {
size(200, 200);
frameRate(10);
// open the port that the board is connected to
// and use the same speed (9600bps)
port = new Serial(this, 9600);
}
void draw() {
if (0 < port.available()) { // if data is available,
val = port.read(); // read it and store it in val
}
background(255); // set background to white
if (val == 0) { // if the serial value is 0,
fill(0); // set fill to black
} else { // if the serial value is not 0,
fill(204); // set fill to light gray
}
rect(50, 50, 100, 100);
}
Notice that the Arduino sends a value that Processing looks for and interprets. You can also look at the PhysicalPixel example from the Arduino IDE for an example on sending data from Processing to Arduino.